I’ve got free charger Zanflare C4 for review purposes. Then I started to digg at BLF and found there are already four reviews:

http://budgetlightforum.com/node/55185
http://budgetlightforum.com/node/55720
http://budgetlightforum.com/node/55609
http://budgetlightforum.com/node/55835

“Dammn”, what to do now. Then I’ve got an idea to say few words about some differencies I could observed comparing with well known Opus BT-C3100 (C3100 in short). There is a lot of quite good chargers out there but not so many with analyzing features. Will try to concentrate on that feature.

Main difference between the two is the power they can use during charge and discharge. Since C3100 is using more power it has to use fan to cool down eletronics. Most of us has some sort of problems with C3100 fans. I have already to replace it. Fan is pretty loud and can be anoying if you want to run it in living room, specialy when you want to monitor behavior.
On the other hand C4 has no fan so it is completly quiet. Of course the power used has to be lower, specilay during discharge. Otherwise resistors would be burned quite quickly. So if you are satisfied with slower dischage C4 is good choice.

On discharge/test features I’ve noticed both chargers gives to high readings. Wanted to know why. I’ve studied HKJs reviews and hopefuly found out the reason for this. It might be obvious for some but most people probbaly won’t know. Discharge is not using constant current and it stops for short time to check the voltage. This time is not extracted from the capacity calculation. Longer is the pause higher is the capacity reading.

For test I’ve used brand new Samsung 26L M cells discharged/tested at 0.5A and got C4 on left, C3100 on right

Capacity readings for some LSD AA cells

Looks like C4 has to have longer period of pauses during discharge but it is more consistent. Will see how they are doing with internal resistance.

What do you think? Can we get some percentage to correct capacity readings?

I received a free sample of this charger from Miboxer to do this review

They sent me this charger with DHL express.

The charger comes in a cardbox, that is slightly damaged at an edge.

The box contains:
- Charger
- 230V EU power cable
- 12V 5A PSU
- Manual

The manual is in English.

The UI is quite easy and good described in the manual so I don’t go further into it.

This review is long enough, for specifications look for them on their “website”:http://www.miboxer.com/eng/p6.html.
I made a time-lapse to show how the charger operates.

At 12 minutes I change the current from automatic range to 3A per cell.

The charger has a conservative automatic selected current, it does not provide too much current to any of my cells, but on some with PCB it charges very slow.
Better use manual charge current.

It charges all types of lithium batteries and NiCd/NiMh with the proper CC/CV and delta V charge curves.
Good charge characteristics for lithium and NiMh.

The charger also is capable to run as a powerbank from slot 4.

The charger design seems similar to my Nitecore D4 or my Klarus CH4S just it is bigger so it can charge 4 26650 at the same time.

It comes with a EU plug to my destination, easily to change the cable to other sockets.

The first thing was opening the charger to look inside, how well it is build.

It looks very similar to the C2-6000 that has also 3A per slot.

The charger uses rails with sliders to make contact, all contacts and rails are made of coated steel,
copper would be nicer but being steel seems not to affect the voltage readings much.

The Chargers plastic is durable and also is reinforced.
Both parts of the shell snap in as addition to the 4 screws.

The resistance measurement with the charger seems consistant, just empty cells have higher value than it shows when fully charged

First thing was to bypass the rails with 4 different wires to test this compared to the stock charger.

The display comes with a protective film that is also labeled as such, often it’s hard to see if there is a protection film on the charger
so people don’t remove it.
The overall looking is better than my Klarus CH4S charger.

The charger weights 615g with PSU so it is heavier than most other 4 slot chargers,
definitely not a travel charger.

The PSU is heavy and seems of good quality, I do not open it as it is sealed.

The SMD parts are all lined up perfectly and soldering is good.
There is one resistor that has a 2. stacked on top, soldered by hand there.

The charger board is single sided the rails are soldered well.

The springs are not soldered like in many charger so there is no risk that it gets loose.

The charger board is really clean the contacts are made of plated steel.

The battery contacts have 3 raised points to make contact to 10440, 18650 and 32650 sized cells.
The slider has 2 raised points.

The Charger uses low ESR capacitors the inductors are glued with silicone for mechanical stability.

The charger has temperature probes for each slot individually.

The microcontroller is the same than in the other Miboxer chargers.

The slots have each 2 0.068Ohms sense resistors parallel.

On the right side of the board is the USB output boost converter for slot 4.

Near the DC power socket there is a claw chip like AMC7135s.

The power socket is high quality

Display board looks good.

It is possible to charge 2 D sized cells but not really fitting.



If the side would be shallower at the battery positive side it would fit.

This was better in the C2-6000.

Conclusion

Pros:
- high quality build
- 3A each slot
- proper charge characteristic
- can charge 4 26650 at the same time
- good electrical safety
- easy UI
- slowly ramping up charge current
- temperature control for each slot

Neutral:
- only NiMh and 4.2V lithium batteries supported

Cons:
- 2 D-cell sized batteries do not fit in well, a minor change in the case design could fix this

SODA Dual Battery Charger 2017





This is a dual cell mains and 12V powered LiIon charger with a switch to select charge current.



It arrived in a small cardboard box with specifications on it.



The box included the charger, a mains cable, a warranty card and the instruction sheet.



The charger has a mains socket with universal power (100-240VAC 50/60Hz) and a 12V DC connector.
The current selector is placed between the two power input.



The only user interface is a led light for each channel, it is red when charging and green at other times.



Specifications are on the bottom.



The slots uses the classical slider construction and it works fine.
The slots can work from 29 mm to 70.2mm. This will give problems with long protected xx650 batteries.







The charger can handle 70 mm long batteries including flat top cells.



Measurements

• When not connected to power it will discharges with less than 0.3mA.
  
• Below 0.8V the charger will not detect a battery
  
• Between 0.8V and 2.9V the charger will charge with about 50mA to 100mA
  
• Above 2.9V the charger will use regular charging.
  
• Charger will restart silent when voltage drops slightly.
  
• It will restart charging on reinsertion of the battery or power cycling.
  
• Power consumptions when idle without battery is 0.4 watt in 1A and 0.3 watt in 0.5A setting.
  
• From 12V it need 19mA when idle without battery in 1A and 15mA in 0.5A.
  

Efest LUSH Q4 Charger 2017





This is a simple quad cell mains powered LiIon charger without any settings.



It arrived in a small cardboard box with specifications on it.



The box included the charger, a mains cable, a warranty card and the instruction sheet.



The charger has a mains socket for power and is universal power (100-240VAC 50/60Hz).



The only user interface is a led light for each channel, white when charging and blue when finished.



Specifications are on the bottom, but not very easy to read.



The slots uses the classical slider construction and it works fine.
The slots can work from 27 mm to 70mm. This means that it will handle most 18650/26650 batteries, except the longest ones.







The charger can handle 70 mm long batteries including flat top cells.
The charger current is on the high side for many regular cells, but fine for IMR batteries



Measurements

• When not connected to power it will discharges with about 8mA.
  
• Below 0.55V the charger will not detect a battery
  
• Between 0.55V and 2.8V the charger will charge with about 600mA to 1.2A
  
• Above 2.8V the charger will use regular charging.
  
• When one cell is full, the others will be charged with the higher current.
  
• Charger will restart silent when voltage drops slightly.
  
• It will restart charging on reinsertion of the battery or power cycling.
  
• Power consumptions when idle without battery is 0.2 watt
  

PortaPow AA+AAA usb battery charger





Portapow has usb chargers, cables, power banks, solar panels, usb meters, etc.. Here I have found a simple usb powered charger for AA/AAA batteries. I can charge from 1 to 4 NiMH batteries and is specified to use -dv/dt termination.



I got the charger in a plain white cardboard box.



The pack contains the charger, a A-A usb cable and a instruction sheet.



The charger has a usb-A connector for power input, this do not fit the normal usb cables, but requires a special USB-A to USB-A cable (it is supplied). I would have preferred a micro usb input, then it could have used the same cables as most phones and other usb equipment.



At the back the charger has a red led to show when power is connected.



The display has four animated battery symbols when charging.
Pressing the refresh button will stop the animation and slowly discharge the cells. When the cells are empty they will be charged again.



The charger has a flip down spacer to select between AA/AAA batteries.



The other end is just normal connections, but not in very good quality. I had to bend them a bit to get enough tension on the batteries.



One AA and one AAA.







Measurements

• Power consumption when idle is 21mA from usb.
  
• At 0.3V or below the charger will report error (The battery symbol flashes).
  
• Above 0.3V the charger will use normal charge current.
  
• Trickle charge is about 13mA (Good).
  
• When not powered it will discharge batteries with about 0.1mA
  
• Charge will restart charging after power loss, or battery insertion.
  

The opus BT-C3100 V2.2 is an intelligent 4 slot lithium-ion battery charger with a easily readable backlit LCD display. This charger supports up to 2Ax2 or 1Ax4 charging current. The BT-C3100 is a great choice for charging multiple 18650s at once and especially testing different cell’s capacitys with its numerous functions.

This charger can be found on amazon for $37.99

https://www.amazon.com/Opus-BT-Intelligent-Compatible-Batteries/dp/B0185...

Specifications Listed by Manufacturer

Main Features:
The charger integrates the minus delta voltage for NiCd or NiMh battery charging termination, and for Li-ion batteries charging to 4.2V with pre-selected constant current. ( 3.7 Li-FeO4 and 4.35 type high voltage batteries charging mode can be selected through switch on board )
Easy to read LCD with back light Showing Battery Voltage, Charge / Discharge Current, Charging Time, Battery Capacity etc.
Operating temperature: 0 – 40 deg.C
Max charging capacity: Up to 20000mAh
Power adapter: DC 12V, 3.0A ( Output ), 100 – 240V, 50 / 60Hz ( Input )
Highlight:
1. Voltage update rate is 30s instead of 60s.
2. 4.35V charging time can be very long because charging current is regulated in entering the CV stage at 4.12V, which is same as 4.2V type. Now
3.35V charging algorithm is changed to 4.27V.
4. New fan cover make better protection for cooling fan.
5. Charging current range ( mA ): 200, 300, 500, 700, 1000, 1500, 2000
6. Discharge current range ( mA ):200, 300, 500, 700, 1000 ( li-ion cell battery only )
7. Max. charging capacity: 20000mAh
8. Voltage deviation: max 0.03V 4.2V
9. Current deviation: max 5%
Type: Charger
Brand: Opus
Model: BT-C3100 V2.2
Rechargeable Battery Qty: 4
Input Voltage: AC 100~240V 50/60HZ
Output Voltage: DC 12V, 3.0A
LCD Screen: YES
Auto Circuit Detection: YES
Built-in Protected Circuit: YES
Over Voltage Protection: YES
Short-Circuit Protection: YES
Over-Charging Protection: YES
Over-Discharging Protection: YES
Battery Quantity: 4

Packaging

Package weight: 0.558 kg
Product size (L x W x H): 14.4 × 9.8 × 3.9 cm / 5.66 × 3.85 × 1.53 inches
Package size (L x W x H): 16 × 22 × 5 cm / 6.29 × 8.65 × 1.97 inches

Contents

1 x Opus BT – C3100 Battery Charger
1 x US Power Adapter
1 x English User Manual

Included AC-DC adapter outputs 12v 3A Max

Physical Attributes

The Opus BT-C3100 is made out of ABS plastic and feels like is has a very sturdy structure and is built well. The buttons below the LCD feel very solid and have a nice click to them when used. The charging bays adjustable negative poll is attached via spring which also is very strong and holds the battery in place very well.

This charger holds 4 18650 cells comfortably and is very easy to extract them from the bays when they are done charging. Protected versions of all compatible cells fit snugly inside the charger except for protected 26650’s.



The negative end of the cell is just barely not connecting thus the problem with this charger and holding protected 26650’s

Cooling The unit
The charger has a cooling fan built in to cool down the internal components when charging at high currents
The fan is somewhat loud but not loud enough to be bothersome when in listening vicinity

Measurements
The unit is approximately 4“x 5.75” or 10cm x 14.5cm

Display and Selectable Modes

The BT-C3100 has multiple different modes (Charge, Discharge, Test, Quick test, Refresh) and charging currents to choose from including 200,300,500,700,1000,1500,2000 mAH

Operating the Unit
Pressing the mode button will cycle you through the 5 selectable modes (Charge, Discharge, Test, Quick test, Refresh)
Pressing the display button will cycle you through the 4 different informational displays (Voltage, Current, Capacity, Charge time)
Pressing the current button will allow you to select the desired charging/discharging currents
Pressing the slot button will cycle through the 4 slots in the charger

Volatge

Current

Capacity

Charge Time

The Modes

The unit has 5 selectable modes including Charge, Discharge, Test, Quick test, and Refresh.

Charge Mode: The rechargeable battery is charged up to its maximum capacity. Accumulated charging capacity is displayed at mAH display mode.
The charger will charge 4 cells at once charging each at 1 amp. But if you are charging only 2 batteries you should put them in the outer slots (slots 1 and 4) to increase the charging rate to 2 amps a piece. This is especially good for charging 2 26650’s at the same time

Discharge Mode: Discharge mode is used to reduce memory effect, The rechargeable battery is discharged to a preset battery voltage (0.9v for Ni-Cd & Ni-Mh, 2.8v for Li-ion batteries). Once discharge is finished, total accumulated discharging capacity is displayed at mAH display mode.

Refresh Mode: The rechargeable battery is charged and discharged repeatedly to optimize to its maximum capacity. Old rechargeable batteries or rechargeable batteries that have not been used for a long period of time can be restored to their rated capacity

Test mode: Checks the present capacity of a rechargeable battery. The maximum capacity is determined by discharging the rechargeable battery after it was fully charged.

Quick Test mode: The charger will analyze the dynamic internal battery resistance by applying a load and the current reading is referred to the voltage drop detected on the battery. Within 10s, the tested battery resistance will be displayed in the unit of milliohm.

Supported Batteries/ Technical Data

This charger can only hold 2 26650’s in the outer slots

Final Thoughts

The Opus BT-C3100 V2.2 is a great all around charger option for all those who want to charge multiple cells at a time and for those who want to test the capacities of their cells. This charger can be used by anyone with any experience level due to the simplicity of the operation of the device. My favorite aspect of this charger is its ability to discharge your cells to get the exact readout of mA to see if your cells capacity is infact true to what the label says. The charger also fully charges all cells to a even voltage of 4.2 volts and trickle charges them to keep the cells topped off if you leave them on the charger after they are done charging.

The only thing I would have liked to see in this charger would be a higher charging current when charging 4 cells at a time, especially for high capacity 18650s it will take about 3.5 hours for them to fully charge at 1A

All in all I highly recommend this charger to anyone who wants a well built, multi mode charger that will act true to its specifications.

Charger Efest LUC V6 2017





This is one of the larger chargers from Efest with 6 slots and Bluetooth connection.



The charger comes in a cardboard box.



In the box is the charger, a mains cable, a instruction sheet and a warrant card.



The charger is powered from mains with universal voltage input (100-240VAC 50-60Hz).



The front has the display, a button and 6 slots with a led each. The led is red when charging and green when done. It is off when no battery is in the slot.



The button can be used to select what slot to display and change between 0.5A, 1A and 2A charging on some slots.
A fast press will change slot, hold down to change current.



Display during power on with all segments shown.
The display will turn off rather fast, to turn it on again press the button.



0.5A charging is supported on all slots. One slot digit will flash, this is the slot the voltage is shown for.
Current is common for all slots.



1A current is supported in slot 2-5, the current selected slot do not have a battery in it (Voltage=0).



2A current is only supported in slot #1 and #6 (The ones supporting 26650 cells).



As usual there is some specifications on the back of the charger



The sliders for the battery work smoothly and can accept batteries from 29mm to 70.5mm. This means the new xx700 batteries will fit, but some long protected xx650 will not.







The charger is rated for 10440 batteries, but due to the charger current it is only recommended to charge IMR 10440.



Bluetooth app.

A charger with build in Bluetooth need an app before the Bluetooth is interesting.
I found it in the Google play app. store.



It did connect to the charger and it looks fairly good, but it never shows any data or allow any control of the charger.
I.e. it is NOT WORKING.



Measurements

• When not connected to power it will discharges with up to 0.08mA.
  
• Power cycling or reinsertion of the battery will restart charging.
  
• At about 0.6 volt the charger will detect a battery and start charging with 50mA
  
• At 3V the charger will apply full charge current.
  
• The charger will silent keep the cell charged.
  
• The voltmeter is limited to 4.2 volt
  
• The voltmeter starts showing a value at about 0.6V, but it shows around 1V
  
• Generally the voltmeter is within 0.3V
  
• Power consumption when idle is 0.4 watt
  

GyrFalcon All-88 2017 (Enova)





Enova has updated their universal 8 slot charger.






The cardboard box lists a lot of specifications for the charger.



The box included the charger, a power supply, some accessories for special battery sizes and a instruction sheet.



The accessories are spacers for handling small batteries and some extensions for the plus connection for handling C, D and 32xxxx size batteries



The extension in use.



The DC input is the usual barrel connector and it is rated for 12V input at 4A.



The display has many elements on it, because the charger can handle many types of cells.



One this image the charger is in automatic mode, i.e. it is not possible to select voltage, that will be done automatic and only NiMH and 4.2V LiIon can be charged. (Hold down Fn and CV for some time to switch between manual and automatic)

In manual mode it is possible to select both voltage and current for each slot:
Press button for slot to select it.
Press button for slot again to select voltage.
Press CV to select current setting.
Press button for slot to select current.
Press CV to select voltage setting again.
Hold button for slot down to start charging.

Start a slot (Method 2):
Press button for slot to select it.
Press button for slot again to select voltage.
Hold button for slot down to start charging.
Press CV to select current setting.
Press button for slot to select current.

The above methods are rather long if you want to charge many cells, the charger has some shortcuts to handle that:
Hold button for charging slot down and tap button for other channel will copy the settings and start charging on the other channel.
Hold Fn down and press CV will select 1A and 4.2V charge voltage for all idle slots, pressing multiple times on CV will change voltage.

These short-cuts means that charging any number of (4.2V) 18650, 26650, 32650 can be started by holding Fn down and tapping once on CV.
Charging any number of AA can be starting by holding Fn down and tapping CV twice.



The C.A line shows selected current and is also used to select current when the “>>” marking is at this line.
The V.V line shows selected charge voltage and is also used to the select voltage when the “>>” marker is flashing at this line.
The battery icon is animated when the charger is charging.
The display will automatic dim after some time, any button press will bring it back to full brightness.



In this image adjustment of current is select (>> is at the C.A. line).



The sliders work very smooth and can handle from 30.2mm to 71.7mm, up to ø26mm cells can be placed in each slot and it is possible to use ø32mm cells in each other slot when the extension is used (Only two supplied). For NiMH extension must be used for both C and D cell.
Due to the wide slots, care has to be taken with thinner batteries to get a connection.



Using the “Extensions” both C and D cell can be charged.











With 10180 cell the 100mA charge current is on the high side, but because most 10180 are high current cell it will usual be acceptable.
C, D & 32xxx cells can have trouble with the plus connection, using the small extender will fix this.



Measurements on charger

• Power consumption when idle is 0.8 watt with display off (1.4 watt with display on).
  
• Will discharge a LiIon with 0.1mA when not charging.
  
• Will discharge a NiMH with 0.15mA when not charging.
  
• Will not charge at 0 volt.
  
• LiIon charging start at about 1.0 volt with a few mA.
  
• NiMH charging start at 0.7 volt with selected current.
  
• Ib automatic mode it will assume LiIon above 2V
  
• From about 1.5 volt to 3.0 volt it will charge with 50mA (72mA for 0.5 and 1A charge current), this is the same for all LiIon chemistries.
  
• Above 3.0 volt the select current will be used
  
• Meter starts working at 0.7 volt, but is first precise at around 1 volt.
  
• Meter is within 0.03 volt.
  
• Meter stops updating when battery is full.
  
• Meter will not reduce reading.
  
• Charger will restart silent if LiIon battery voltage drops below 4.1 volt (4.2V charging).
  
• Power cycling and insertion of a battery requires button press to start charging in manual mode.
  

Charger Miboxer C4-12





Miboxer is a new brand in chargers, this model is a four slot universal charger with automatic current selection.





I got the charger in a cardboard box



The pack included the charger, a power supply, a mains cable and a instruction sheet.



The charger requires 12V 5A power and has a usb power bank output.



The user interface is a single button and a large display.
A short press on the button will switch between slots.
A long press on the button will allow adjustment of charge current for the selected channel (with short presses).
The interface is easy to use, but it is a lot of presses to select current for all slots.



During power on all segments are shown.



Charger is idle.
The background light will turn off after a short time, the first button press will turn it on again.




During charge the display will show voltage, charge current and internal resistance.



WHen using usb output the usb current is shown on the display.



The charger has the usual slider construction. It can handle from 31mm to 73mm, this means even the longest cells. The large plus connection also means it can handle D and 32xxx cells.












Measurements charger

• Power consumption when idle is 0.26 watt (Background light off).
  
• Without power it will discharge a LiIon battery with 1-3mA depending on voltage.
  
• Without power it will discharge a NiMH battery with about 0.2mA
  
• A full LiIon battery will be pulsed with a few mA.
  
• At 0V battery voltage the charger will charge with 1.5mA.
  
• Above 2V the charger assumes LiIon
  
• The charger will restart when a battery is inserted or power is cycled.
  
• The meter is within 0.01V and works from 0.02V
  

• Without power it will discharge a LiIon battery with 1-3mA depending on voltage.
  
• Usb output is coded as DCP
  
• Usb output uses slot #4 for power.
  
• Usb output will turn off after 30 seconds with below 75mA load.
  
• Usb output turns off when power is connected to the charger.
  
• To keep display and usb power on requires about 42mA from the battery (17mA when background light is off).
  

The flashlight was provided directly from Miboxer for review.
Here's the product's page: Miboxer C4-12

Starting from the packaging, the charger comes in a nice cardboard box.

The charger itself is firmly seated inside the box.
In order to protect the LCD screen from scratches, a plastic film is installed over it.

The contents of the box are the bare essentials to get you started.
In total, you get the charger, a power brick and a detailed user manual.

The design of the charger is minimal.
It accepts up to 4 cells and is utilizing a spring loaded negative terminal mechanism. 

The back side of the charger houses the air vent hole as well as four anti-slip pads.
Speaking of the air vent, it's worth noting that the operation of the charger is very quiet.
The fan doesn't turn on unless the system detects a raised body or cell temperature.

The back side also has a small table that lists the supported cell types.
As seen, the charger supports pretty much all of the common sized Ni-MH and Li-Ion cells.

The top of the charger houses the 12V input port and a USB output port.
The USB port is utilized once the charger is turned into a powerbank - We will see more about it down the review.

The LCD display is quite bright and provides a whole lot of information once a cell is inserted in the charging slot.
The backlight will dim out after about a minute of the charger being inactive.

The picture below demonstrates the charging of four different cells: 26650, 18650, 14500 and AAA.
As seen, the spring loaded terminal system can accept pretty long batteries (up to around 76-77mm in length)

A nicely designed featured that I observed is the three raised tabs that each slot has.
Thanks to the multiple bumps, the manufacturer ensures that any type of battery can make good contact with the charging plates.

At any given time, the charger displays information about only one cell.
The user can scroll through all the 4 slots by pressing the 'Slot' button.
By default, the charger automatically selects the charging speed considering the internal resistance and the voltage of the battery.
A constant press of the 'Slot' button enters the manual mode, which enables the user to selects the preferred  charging current (up to 3A per cell! ). 

Every 5 seconds, the information that's being displayed will be cycled through (Cell Voltage -> Charging Current -> Internal Resistance)
Here are a few pictures that will help you understand the whole deal.

Being a fast charger, the Miboxer C4-12 needs quite a bit of power to push a total of 12A through the cells.
The integrated power supply unit is 'AOK' branded and comes with some nice, long cables (Both EU and US plug models are available).
According to the engravings, its rated for 60 Watts of constant power and can work both on both USA's and EU's power grid.

For ease of carry, the power cord is detachable from the power supply unit.

In case of an emergency, the 4th slot of the charger can be turned into a powerbank by simply inserting
a cell while the PSU is disconnected. The USB slot is rated for a maximum of 1A current, which I found
to be pretty accurate.

To sum everything up, I have really enjoyed using the charger.
It automatically selects the best charging current, it allows you to use fast charging and its operation
is very simple and automated.
Another bonus point goes for the nice amount of information that the LCD displays.

XTAR Over 4 Slim Fast Charger

Notice!
The XTAR Over 4 Slim was provided free by Xtar for my honest and unbiased review no other payments are received other then the charger provided.

Introduction

I have several XTAR Chargers namely ANT MC1 Plus and MC1 all are small traveler friendly chargers with small form factor and also small charging current, what i like about the MC1 is that it is powered by your phone charger but it’s charging current is not something to bring home about.
I have been eyeing a more powerful charger that can charge bigger battery “properly” such as the 26650 most cheap charger can only charge at 1 amps or 2 amps for the more expensive one so when XTAR contacted me if i want to test their new charger with 4.1A charging per slot i was excited to say the least. I have several big boy charger that can charge at 1000w or more but that is what we call a hobby charger, i have been using my hobby charger to charge my 18650 at a higher current if the need arises but such charger is an overkill for this kind of purposes. My smaller ISDT with 8A charging ability can happily charge 4×18650 at 2A each and that is what i have been having so i know that my 18650 Samsung is HOT when charged at 4A.
so now on to the XTAR Over 4 Slim.

Positive:
High 4.1A current charging.
UI is really simple with only 2 buttons for adjusting current.
Charging current can be changed anytime, choices are 4.1A, 2A, 1A
No changing or scrolling information on the LCD, only the Internal Resistance measuring at the beginning of the charging process, so the information you need is there on the LCD without having to wait for it to appear.
Displays the voltage, not the battery voltage tough but a charging voltage as the charger doesn’t have voltage sense.
Function as USB output device, can charge your mobile phone, gopro or any devices powered by USB port.
Nice soft touch material on the outside.
No spinning fan inside so no fan noise which usually audible in quite room.
Reversed protection protected.
2 USB output ports, i think 1 port is enough but i think XTAR is being generous that they gives us 2 Ports.
12v 4A Adapter is provided.
Temperature probe, you know how hot your batteries are and the temperature reading are also available on the LCD.
Bright and sharp LCD and good viewing angle, also has auto dim function. to wake it up just press either CH/CH2 buttons.
Nice white with blue fresh design different compared to other tired all black design, look different and interesting.

Negative:
No Accumulative capacity so you dont know how much capacity you put back into the battery.
Ringing sound when charging probably the inductor, really subtle no intrusive or annoying.
No incremental charging current you stuck with 3 current options.
No discharge function and measure capacity.
External power supply, this could be cumbersome.

Neutral
Cannot charge Ni-MH or Ni-CD to be fair this charger probably meant for Vaping or Flashlight communities so lacking Ni-MH charging is probably a decision made by XTAR to reduce the cost somewhat, but this make the charger not the ultimate charging solution. I still have use for AA Ni-MH such as my camera speedlite but all of my flashlights are lithium powered.

Positive contact toward the front of the charger, for some this could be annoying as most charger has negative on the front side thankfully charger is protected from reversed insertion so no harm done.

Some observation i made.

Notice: this is just some measurement and observation made with amateur tool.
Ampere draws from the AC outlet when charging. as you can see the 48watts is just enough that is if the power rating is true. On the right side is a measure vs stated charging current that the charger is outputting.

When charging 2 slots at 4.1A and 1 USB output is use one of the Charging port will reduce the current to 2A. if two USB output is use both Charging will reduce to 2A. There are 2 USB ports and each port is tied to each charging ports. So in total the charger will not draw more than 40 watts from the wall.

the big gun, but probably to much even for parallel charging 18650 battery. Each can charge 30A and 40A without braking sweat.

I have been using this ISDT to charge my 18650 at 4A

Charging my 18650 at 4A, hot i tell you.

The white box, the material is excellent feels expensive, the same feel as the box you got from the more expensive smartphone and also has weight to it thanks to 4A power supply/adapter. On the lower left there is XTAR counterfeit scratch code. I haven’t test if mine is genuine

The box on the front side

Text on the back of the Box

Battery sizes and the chemistry that this charger accept, no 14500 and no 16350. Notice the 20700 and 21700.

This charger will activate your over-discharged batteries by charging it slowly.

The right side of the box

Another box inside the outer sleeve box with XTAR name on it.

What inside the Box, 12v 4A adapter and the charger.

The charger itself

The included adapter has pilot lamp but doesnt seems to work/light up, but the adapter itself is working just fine.

DC Jack to power the charger with center positive on the back side.

Underneath the charger, no fans just vent holes

The sliding mechanism only small travels that is why it wont charge a smaller battery. i found it to be smoother than most.

Temperature probe made of metal that is curved to match the curvature of the cylindrical batteries.

LCD when battery is inserted, there is 5 seconds delay before the charger recognize the battery and start charging.

When the charger is start charging then it displays the information

In the beginning of the charging and only in the start of the process, the charger will displays iInternal resistance of the battery and it cycles through between battery percentage and IR then it only displays the percentage.

Samsung 30B charging.

Notice how hot the batteries are at 4A and this is charging 26650 at 1C now imagine charging 18650 at 4A i’ll probably stick to charging at 2A for 18650s good to have extra power when needed.

Charging 2×26650 at 4A each, it shows 100% and green light when full.

What it is look like when charging 2×26650.

Summary

Overall this is a really nice charger, with different look compared to all other tired black design. The UI is simple, choose your current and set your are done. Adapter is supplied so you are ready to go. LCD is bright and sharp with good viewing angle. Despite its lack of charging smaller battery and other chemistry such as Ni-MH/Ni-CD and no small increment in charging current its simplicity and its power what makes this rally an interesting charger. I am really liking this charger.

Charging at 4A is making the batteries really hot, i think adding a small fan underneath the battery cradle to create a small air movement will helps a lot, i doesn’t need to be fast just create some movement of air. The charger itself doesn’t have cooling fan for the electronic because it doesn’t need to, i found even at 4A x 2 charging the charger remain cool and the provided power supply doesn’t get hot either but the batteries do get hot and needs some cooling.

Video review for more detail on the Charger

Xtar MC6 II Queen Ant II





Xtar has updated the Queen Ant charger from dual usb input to power supply input and with all slots delivering the same current.




The cardboard box lists lot of specifications, battery types and features.



The box contains the charger, a power supply and a instruction sheet.



The charger has a barrel connector input for 5V 3A.



The only user interface is 6 leds, one for each slot, they are red while charging and green at all other times.



The supported batteries are listed on the bottom of the charger.



The slots uses the usual construction and works well. They can handle batteries from 31mm to 72 mm long.







The charger can only handle two 26xxx battery at a time.
The charger can easily handle 70 mm long batteries, inclusive flat top cells.



Measurements

• Discharges with less than 0.02mA when not connected to power
  
• Between 0V and 2.8V it will charge with 50mA
  
• Above 2.8V it will apply regular charging.
  
• Will restart if battery voltage drops below 4.06 volt.
  
• Charge will restart charging after power loss,
  
• Inserting a nearly full battery will not start charging.
  
• Power consumption is 0.2 watt when idle.
  

Uniross 3T is a smart compact charger from Uniross that can be used to charge various battery types and size. It can handle all the most popular types and sizes of Ni-MH/CD, Li-Ion, LiFePO4 batteries including 1 or 2 pcs of AA, AAA, C, SC, D, 26650, 26500, 22650, 18650, 18490, 18350, 17670, 17500, 16340/RCR123, 14500, 14430, 10440 etc.

I received a free sample from Uniross some weeks ago and it came in a neat vibrant orange color cardboard box. It contains the charger, micro USB cable, and a manual book.

Uniross 3T Overview

The charger also equipped with 12 volts input port but no cable or power adaptor is included.

It has two charging slots that can be used independently. It means we can charge two batteries at a time even if the sizes are different.

Polarity sign is displayed clearly on the charging slot and Uniross puts reverse polarity protection feature on this smart charger. Should we insert the battery in the wrong direction, an “ERROR” text will be displayed on its LCD screen.

Small LCD screen on Uniross 3T is quite intuitive, it displays detected battery type, charging status, charging process, and technical numbers (charging time, current, voltage).

Because the screen is quite small, it can only display one detailed battery information at once. To display another battery information (when charging two batteries at once) we must press the “SLOT” button on its side part of the charger.

Another button is a “MODE” button which is used to switch output current from 500 mAh (default charging current) to 1000 mAh (for Li-Ion and LiFePo4 only).

The button also used to “activate” charging for LiFePo4 batteries by pressing both buttons (SLOTS & MODE) at same time. Please refer to their user manual for more operating information.

Charging With Uniross 3T

The ability to charge different battery size in the same time is a nice and a must have feature nowadays. I guess most battery chargers already have this feature too.

Eneloop batteries (not pictured) also fit nicely in the charging port.

Charging time might vary depending on your battery type, capacity, as well as the power source. I tried using iPad Mini’s charger and it draws 800-1000 mAh.

I’m not sure if my “Charger Doctor” is accurate, though. I’m planned to purchase decent multitester in the near future for better measurement.

Default output current is 500 mAh, we can select 1000 mAh output by pressing the MODE button. The little triangle above the battery icon on screen is an indicator of which battery information is currently displayed.

Press the SLOT button to see another battery information and it will be displayed on screen.

When the charging is done, it will display a FUL message and a “finish” status. You can also see that the battery gauges are all full.

Summary

The only thing I missed from this charger is the feature to bring back a “dead” battery after being over discharged. I tried to insert an over discharged battery and it shows an “ERROR” on the screen.

Pros:

• Supports Li-Ion, NiMh, LiFePo4
• Accept numerous battery size
• Compact size
• Informative LCD screen
• Two input sources: micro USB & 12 volts DC jack
• Reverse polarity protection

• Unable to charge an over discharged battery
• Can’t display both batteries information at the same time

Supplied via MiBoxer for product review

The MiBoxer C4-12 is an intelligent high amperage 4 slot battery charger with power bank functionality for charging seperate devies off your rechargable batteries via USB port on the side of the device. The C4-12 supports up to 3.0A per slot for high efficency charging rates compared to most other chargers on the market. This charger stands out due to the fact it has an intelligent charging system where the charger takes information from the inserted battery and automatically chooses and adjusts the carging current based on the batteries specs.

This charger can be bought on Amazon for $49.99

https://www.amazon.com/Miboxer-Battery-simultaneously-rechargeable-batte...

Specifications Listed by Manufacturer

Parameters:
Size: 6.2in*4.7in*1.7in
Weight: 485g
Material: Fireproofing PC+ABS
Color: Black
Input Voltage /Current: DC12V 5A
Output Voltage: 4.2V±0.1%/1.48V±0.1%
Output Current: Li-ion maximum 4*3A /Ni-MH/Ni-Cd maximum4*1A

Apply to:
Li-ion(4.2V) (IMR/INR/ICR) 10340 / 10350 / 10440 / 10500 / 12340 / 12500 / 12650 / 13450 / 13500 / 13650 / 14350 / 14430 / 14500 / 14650 / 16500 / 16340(RCR123) / 16650 / 17350 / 17500 / 17650 / 17670 / 18350 / 18490 / 18500 / 18650 / 18700 / 20700 / 21700 / 22500 / 22650 / 25500 / 26500 / 26650 Ni-MH / Ni-Cd(1.48V):AAAA / AAA / AA / A / SC / C / D

Package information:
Package include:
1*C4-12 Battery Charger
1*Adapter( 12V 5A)
1*User Manual

Adapter information:
Input Voltage: 100-240V
Output Voltage: 12V
Output Current: 5A
Material: PC

Advantage:
Super Fast Charger 3A for each slot, total 12A; four slots charging independently with a power bank function.

Attention:

Only 4th slot have the usb output function, and only for li-ion battery. It can’t charge for LifePO4 and 4.35V li-ion battery.

Packaging

Weight: 485g
Product size (L x W x H): 6.2 × 4.7 × 1.7 inches

Contents

1*C4-12 Battery Charger
1*Adapter( 12V 5A)
1*User Manual

included AC-DC adapter outputs 12v 5A Max

Physical Attributes

The MiBoxer C4-12 is made out of ABS plastic and seems to be made very well. The single button feels very nice and feels like it will hold up to regular use. The negative contacts are very smooth and the batteries are held in quite tightly except for 16340s and similar sizes.

This charger can hold up to 4 26650s side by side in the charger with ease.

Cooling The unit

This unit doesnt offer up any active cooling but the software does take that into account via system throttling if the tempature of the batteries exceed 60°, if the batteries exceed 70° the charger will completely stop charging and display “Err”.

Measurements

the unit is approximately 4.6” × 6” or 11.6cm × 15.2cm

Display and Selectable Modes

The Charger has 8 different pieces of information displayed on the screen when charging batteries, it shows the temp, internal resistance, current, voltage, charging time, battery capacity, battery percentage and battery type.

The C4-12 doesnt have any other modes except charge, but the charging current is selectable by holding down the button for 3 seconds. Once the button has been held down for 3 seconds the amperage readout will begin to blink and you can go through 10 different charging currents or select auto and let the carger decide the current. The carger also is able to restore over discharged lithium batteries.

Selectable currents are as follows

Li-ion

0.1/0.2/0.3/0.5/0.8/1.0/1.5/2.0/2.5/3.0/Auto

Ni-MH/ NI-Cd

0.1/0.2/0.3/0.4/0.5/0.6/0.7/0.8/0.9/1.0/Auto

Supported Batteries/ Technical Data

Other Features

The powerbank feature has a max output of 5v 1A from the USB port, it is powered by inserting a battery in slot 4 of the charger. (this only charges from the 4th slot not all 4 slots combined)

Final Thoughts

The MiBoxer C4-12 is a great charger if you want to get the most out of your batteries thanks to the auto charge feature where it will ramp up/ramp down the current depending on the current state of the battery. This is my favorite charger I have used so far because of how fast it can charge and all of the data it can tell you about your cells. The power bank feature works as advertised but I wish that it ran off of all four slots instead of just the one slot it supports. All in all I would recommend this charger as it is a great buy for such a quality charger.

Xtar Over 4 slim (O4S)





This is a high current charger from Xtar, the “Over 4” name is because it can charge with over 4A, it is only for LiIon batteries, especially high power batteries. In addition to charging batteries it is also a usb charger.



I got the charger in a cardboard box with the specifications printed on it.



Inside the box is the charger, a power supply, a mains cable and a manual.



The charger has a barrel connector for input from the power supply



The user interface is two buttons, a display and for two red/green leds.
The buttons is used to select charge current, one for each channel.
The two leds shows charge status, red while charging and green at all other times.



Charger is analyzing a battery and shows the internal resistance. It will not be shown during charger or when the charger is finished.



During charge it will show a percent.
The charge current is the requested current, not the actual current.



The charger has specifications on the back.



It has not one, but two usb charger outputs and both are rated for 2.4A.



To handle the high charge current without batteries getting too warm the charger has a temperature sensor and to secure good contact it is pressed against the batteries with a spring.



The charger can handle both button top and flat top batteries, but only long batteries, i.e. basically xx650 or xx700 types with or without protection.
The slider moves smoothly and can hand cells from 60.3mm to 77 mm long.







Measurements charger

• Charge current is 4.1A, 2A or 1A, depending on internal resistance in the battery charge will automatic select 4.1A or 2A.
  
• Power consumption when idle is 0.43 watt from mains.
  
• The charger will charge with 160mA from 0 volt, but always starts with a high current pulse.
  
• Below 2.5V the charger will report “Actv” for activating.
  
• At or about 2.6V the charger will test internal impedance
  
• Above 2.9 volt the full charge current will be applied.
  
• When charge is finished the charger will charge with 1mA.
  
• Voltmeter will not show above 4.20V
  
• Voltmeter will update voltage, even after charging is done (Very good).
  
• Voltmeter is within 0.02V
  
• When not connected to power it will draw up to 6mA from a battery (This is a bit high).
  
• Display will reduce brightness after 60 second, but is still readable.
  
• Charger will restart if voltage drops to 3.9 volt.
  
• Charge will restart charging after power loss, or battery insertion.
  

• Usb ports are auto coding.
  
• Usb outputs are independent, but with a common + connection.
  
• Usb shield is not connected
  
• Usb 1 will turn usb indicator on in display at 230mA
  
• Usb 1 will drop charge rate from 4.1A to 2A when drawing 710mA or more from usb 1
  
• Usb 2 will turn usb indicator on in display at 200mA
  
• Usb 2 will drop charge rate from 4.1A to 2A when drawing 640mA or more from usb 2
  

Golisi i1





Golisi have got a simple one slot charger, but with a a better readout than usual.



It arrived in a black very stylish cardboard box, there is some specifications on the back.



The box included a bag for the charger.



The total contents of the box was the charger, the bag, a usb cable and a instruction sheet.



The charger is usb powered and can use up to 2A.



The user interface is a single button and a small display.
Fast presses on the button will change between Volt, mAh and time readout, it will also turn the display on when it is off.
A long press will enable current adjustment.



All segment on the display.



The 3 different readouts (I never got around to remove the protection foil on the display).



On the bottom of the charger there are specifications.



The slots uses the classical slider construction and it works fine.
The slots can work from 32 mm to 71.5mm. This nearly covers anything.







The charger can handle 70 mm long batteries including flat top cells.

All sized NiMH will fit in the charger, but the NiMH charge current is rather low!
As long as the D cell has a flat top it will just about fit.



Measurements

• Idle current is about 30mA from usb
  
• Discharge LiIon battery with 0.3mA when not connected to power.
  
• Discharge NiMH battery with 0.03mA when not connected to power.
  
• When power is connected with a full battery, it will charge with about 0.3mA.
  
• Below 0.3 volt the charger will report error
  
• Below 1.6V the charger will assume NiMH
  
• Between 1.6V and 2.2V the charger will not charge.
  
• Above 2.2V the charger will assume LiIon.
  
• Below about 0.7 volt the voltmeter is not very precise.
  
• Display turns off after 30 seconds.
  
• Voltmeter is within 0.01V
  
• Voltmeter stops updating when charging is stopped and will not show above 4.20V
  
• NiMH is always charged at 0.5A
  
• Charger will not restart when voltage drops.
  
• It will restart charging on reinsertion of the battery or power cycling.
  

Efest LUC V6 2017





This is one of the larger chargers from Efest with 6 slots.



The charger comes in a cardboard box.



In the box is the charger, a power supply, a car adapter, a instruction sheet and a warrant card.



The charger is powered from 12 volt and has an usb output. The usb output can only be activated when no power is connected to the input.



The charger has one button, it is used to select between 0.68A and 2A charging.



All segment on the display is shown during power on. The center symbol is the usb output active indicator.



Charging at 0.68A, when selecting 2A only the center two channels are displayed.



The sliders for the battery work smoothly and can accept batteries from 30mm to 69.5mm.







The charger is rated for 10440 batteries, but due to the charger current it is only recommended to charge IMR 10440. The 16340/14500 is only slightly to high.
Note: Using a bit too high charge current will usual not make the batteries explode, but will reduce lifetime of the batteries.



Measurements

• When not connected to power it will discharges with up to 0.08mA, except the USB out channel that will discharge with 0.4mA.
  
• Power cycling or reinsertion of the battery will restart charging.
  
• At about 0.6 volt the charger will detect a battery and start charging with 60mA
  
• The charger will silent keep the cell charged.
  
• The voltmeter is limited to 4.2 volt
  
• The voltmeter starts showing a value at about 0.6V, but it shows around 1V
  
• Generally the voltmeter is within 0.1V
  
• Power consumption when idle is 0.4 watt
  

• When using usb output, the symbol will flash when the battery is nearly empty
  
• Usb output turns off after about 15 seconds with a load below 55 mA.
  
• Usb output turns on when loaded.
  
• When mains power is connected, the usb output is off.
  
• Usb output is coded as Apple 1A
  
• Usb output will turn off when overloaded
  
• Usb output uses slot #3 for power.
  

Golisi i2





This is a simple two slot charger from Golisi have with a a better readout than usual.



It arrived in a black very stylish cardboard box, there is some specifications on the back.



The box included a bag for the charger.



The total contents of the box was the charger, the bag, a usb cable and a instruction sheet.



The charger is usb powered and can use up to 2A.



The user interface is a single button and a small display.
The button is used to change the readout between volt, mAh, and time



All segments on the display.





The 3 different readouts.



With a single LiIon cell the charger will use 2A charge current in the first slot. The second slot will charge with 1A.



On the bottom of the charger there are specifications.



The slots uses the classical slider construction and it works fine.
The slots can work from 31 mm to 71.5mm. This nearly covers anything.








The charger can handle 70 mm long batteries including flat top cells.




Measurements

• First slot will charge a single LiIon with 2A, second slot with 1A
  
• Idle current is about 42mA from usb
  
• Discharge LiIon battery with 0.3mA when not connected to power.
  
• Discharge NiMH battery with 0.07mA when not connected to power.
  
• When power is connected with a full battery, it will charge with about 0.3mA.
  
• Below 0.3 volt the charger will report error
  
• Below 1.6V the charger will assume NiMH
  
• Between 1.6V and 2.2V the charger will not charge.
  
• Above 2.2V the charger will assume LiIon.
  
• Below about 0.7 volt the voltmeter is not very precise.
  
• Display turns off after 30 seconds.
  
• Voltmeter is within 0.01V
  
• Voltmeter stops updating when charging is stopped and will not show above 4.20V
  
• Charger will not restart when voltage drops.
  
• It will restart charging on reinsertion of the battery or power cycling.
  

As for all my charger reviews, the usual disclaimer applies: I’m not an expert in electronics or chargers, but I’ve been using flashlights, batteries and chargers for almost a decade as a consumer. So I’ll give you my honest opinion on this product as a user.

I received the Gyrfalcon ALL40 for the review from Gyrfalcon.com

The Gyrfalcon ALL40 is a multi-chemistry 4 slot charger, powered either by a micro USB port or a 12v cigar plug with the provided adapter.

This is the box the ALL40 comes in

The ALL40 comes with a micro USB cable, a 12 V charging port, manual and warranty card.

The ALL40 can be powered through any micro USB port or via the provided 12V power adapter

The ALL40, in action.


As you can see the slots have a lot of room and length. The slides are stiff but run with smoothness.

There is only one switch on the charger, and it can be used to turn the screen backlight on and off, and for changing the charging current (250, 500, or 1000mA).

Every slot has its own display portion, showing the voltage of the cell, the estimated charge point and the charging current.

The charger works automatically: you put the batteries in, and the charger automatically detects if the cell is either a li-ion, nimh or nicd and starts the charge.
When using the micro USB port, the max overall current is 2A (250mAx4 or 500mAx4 or 1000mAx2); while when using the car charger 12V all channels could run at 1A (beside 250mAx4, 500mAx4).
If the USB power supply gives less than 2A and the charging current set is higher, the current will be reduced.

A couple of things:
- Every time you disconnect and re-connect the charger, the charging current will be set at the default 1A current, a current fine for bigger or IMR cells, but if you are using smaller cells, you need to lower it (either 250mA or 500mA),
- The charging current can not be set for each channel, only for all the slots at the same time. It means that if you are charging big and small cells, in order to safely charge the small ones, even the bigger cells will be charged at a lower speed.

A micro USB powered charger allows you to use it in the car even if you left home the dedicated 12V port, even if not at full speed (a charger with lower speed charges always faster than a charger without its cable).

Thanks to AntoLed for the camera help.

Charger NiteCore F2





This charger from Nitecore is a light weight dual cell charger with two charge currents and power bank function.




The charger is in a cardboard box with some specifications, battery types and features on it.



The box contains the charger, two rubber bands, usb-3 cable, instruction sheet and warranty card.



The charger is powered from a micro usb 3.0 connector (Using standard micro usb works fine). The word “INPUT” is molded in the plastic.
The usb output is at the other end and the word “USB1” and “USB2” is molded in the plastic.



The charger has 2×3 leds hidden under the plastic, they have a couple of different functions:
When a battery is put into the charger they will show voltage: 3 flash on the first and 7 flashes on the last means 3.7 volt.
During charging and power bank they show the usual charge bar, i.e. 1, 2 or 3 leds on depending on power level.



The slots uses the usual construction and the slider is very smooth. It can handle batteries from 29mm to 71mm long, that means just about any protected and unprotected LiIon cell. The charger works best with flat top cells, button top cells can be a bit more difficult to place in it, because they have a tendency to slide.
Depending on the position of the slider the charge current will be 0.5A or 1A, the changeover is around 61mm.



The rubber bands can be used to secure the cells to the charger when it is used “on the move”.











The minimum charge current is 0.5A and that is a bit high for 10440 cells.
The charger can handle 71mm long batteries, inclusive flat top cells.



Measurements

• Around 61mm battery length it will switch between 0.5A and 1A charging.
  
• When charger has selected charge current it will stay with it.
  
• Below 2.3 volt the charger will charge with a low current.
  
• Between 2.3 volt and 2.8 volt the charger will charge with 80mA.
  
• Above 2.8 volt regular charge current it applied.
  
• When not powered the charger will discharge with about 0.4mA
  
• Idle current for charger is 22mA from usb
  
• Charger will restart if battery voltage drops.
  
• Charge will restart charging after power loss or battery insertion.
  
• Charge will make audible noise when powered without a battery to charge.
  

• When usb output is powered it uses 15mA from the battery
  
• When usb output is turned off it uses 0.4mA from the battery
  
• Without a battery the charger uses about 23mA from usb input
  
• Usb output is on while charging and powered directly from usb input.
  
• Charge can be used as ups, but output voltage will be a bit low.
  
• Usb output is coded as usb charger (DCP)
  
• Usb outputs are in parallel.