Eizfan C2 USB Charger





This charger model is very common, here it is in a Eizfan version. As usual this model is very versatile.



The box contained the charger, usb cable and a instruction sheet.



The pack contained the charger and a usb cable.



The charger is powered from micro usb and has a full size usb connector for power bank output.



The charger has two red leds to show selected current and two rows of four blue leds to select voltage and show battery level.
The button has multiple functions:
When a battery is put into a powered charger, it can be used to select LiIon voltage (NiMH is selected automatic).
When charger is powered a long press (2 seconds) will change between 0.5A and 1A charge current.
A fast click when charging will show the selected battery type.
When used as a power bank a press on the button will turn the usb power on.



The back of the charger list the main specifications in a easy readable font.



The charger uses the typical slider construction, it can handle batteries from 31mm to 71mm, this mean nearly all battery, except some very long protected types.








The charger can handle 70mm long batteries, inclusive flat top cells, this means most protected cells.



Measurements charger

• LiIon and NiMH Batteries will be discharged with less than 0.1mA when power is off.
  
• Charges LiIon batteries with 1mA when connected to power.
  
• When battery is 0 volt the charger will charge with 3mA, this is enough to reset a protection.
  
• From 0.2 volt on the battery the charger will recognize it and start charging.
  
• Between 0.2 volt and 1.6 volt a battery is assumed to be NiMH.
  
• Between 1.6 volt and 2.2 volt the charger will charge with less than 2mA and not allow selection of battery type.
  
• Above 2.2 volt a battery is assumed to be LiIon.
  
• Charger will not restart if battery voltage drops.
  
• Charger will restart charging after power loss, or battery insertion.
  
• Power consumption when idle without batteries is 32mA from USB.
  

Eizfan NC1 USB Charger





This is a very simple single slot USB powered LiIon charger.



It arrived in a nice box with specifications on.



The pack contained the charger a usb cable and a instruction sheet.



The charger is powered from micro usb.



On the top is a led (One led, the 3 part is only design), it is blue while charging and green at other times. If a battery with very low voltage is put into the charger the led will turn off.



Not much easy readable information on the back of the charger, the specifications are embossed in the black plastic.



The charger uses the typical slider construction, it can handle batteries from 33mm to 76mm.






The charger can handle 76mm long batteries, inclusive flat top cells, this means just about all protected cells, even 21700.
The initial charge current is on the high side for small cells, but due to the fast drop off with voltage it is not a huge problem.



Measurements charger

• LiIon Batteries will be discharged with less than 0.01mA when power is off.
  
• Charges full LiIon batteries with a few mA when connected to power.
  
• Charger reports full at 4.15V
  
• When battery is below 1 volt the charger will charge with 100mA and the led will be off.
  
• Between 1V and 2.8V the led will be blue and the current will be 0.1A
  
• Above 2.8 volt full charge current will be used.
  
• Charger will restart if battery voltage drops.
  
• Charger will restart charging after power loss, or battery insertion.
  

Eizfan Pro Q2 Intelligent Charger





This is a simple LiIon charger for two cells.



The cardboard box lists some specifications, battery types and features.



The box contains the charger, a mains cable and, manual.



The charger has a socket mains input, it will accept 100-240VAC 50/60Hz according to specifications.



There is not much user interface on this charger, only one led for each slot. It is red while charging and green at other times, except if a totally drained battery is put into the charger, then it will go out.



Specifications are listed on the back.



The slots uses the usual slider construction. They can handle batteries from 29mm to 70.3 mm long, this excludes protected and button top 21700 and a few very long protected xx650 batteries, but everything else will fit in length.






Due to the 1A charge current it is best only to charger high current version of small cells in the charger.
The charger slots are large enough to fit 32650 batteries, but I had trouble getting connection with them.
The charger can handle 70 mm long batteries, inclusive flat top cells.



Measurements

• Discharges with 0.01mA when not connected to power
  
• Below 0.5 volt the charger will not charge batteries and the led is off
  
• Between 0.5V and 2.9V it will charge with 75mA
  
• Above 2.9V full charge current will be used.
  
• Charges/discharge with less than 0.01mA when battery is full.
  
• Will restart if battery voltage drops to 4.10V.
  
• Charge will not restart charging on a nearly full battery after power loss or battery insertion.
  
• Power consumption when idle without batteries is 0.15 watt
  

Eizfan Pro Q4 Intelligent Charger





This is a simple LiIon charger for four cells.



The cardboard box lists some specifications, battery types and features.



The box contains the charger, a mains cable and, manual.



The charger has a mains input socket, it will accept 100-240VAC 50/60Hz according to specifications.



There is not much user interface on this charger, only one led for each slot. It is red while charging and green at other times, except if a totally drained battery is put into the charger, then it will go out.



Specifications are listed on the back.



The slots uses the usual slider construction. They can handle batteries from 29mm to 70.3 mm long, this excludes protected and button top 21700 and a few very long protected xx650 batteries, but everything else will fit in length.






Due to the 1A charge current it is best only to charger high current version of small cells in the charger.
The charger slots are large enough to fit 32650 batteries, but I had trouble getting connection with them.
The charger can handle 70 mm long batteries, inclusive flat top cells.



Measurements

• Discharges with 0.01mA when not connected to power
  
• Below 0.5 volt the charger will not charge batteries and the led is off
  
• Between 0.5V and 2.9V it will charge with 75mA
  
• Above 2.9V full charge current will be used.
  
• Charges/discharge with less than 0.01mA when battery is full.
  
• Will restart if battery voltage drops to 4.10V.
  
• Charge will not restart charging on a nearly full battery after power loss or battery insertion.
  
• Power consumption when idle without batteries is 0.15 watt
  

Fenix ARE-X11 Charger & power bank





This is a 18650 charger and power bank from Fenix



It arrived in a white retail packing where the charger is fully visible.



The box contained the charger, a usb cable and a instruction sheet in many languages.



The charger is usb powered with a micro usb input and a usb output for the power bank function.




The USB cable is a very flat usb cable with a special A connector, usual I do not really like this type of special cable.




But for this charger it is a nice idea with the usb cable is stored at the bottom of the charger.



The charger has four holes, each with a blue led below, they are used to show the charge status of the battery.




The lid on the charger can be slided toward the front to lock it and back to unlock it.
The charger can handle from 62mm to 70mm long batteries (A unprotected 20700 will fit in the charger, but the lid cannot be closed).








Measurements

• Power consumption from usb when idle with no batteries is about 4mA
  
• Will discharge a battery with up to 0.4mA when not powered.
  
• Charger will only charge batteries when they are above 3V
  
• Will start charging if voltage drops to about 4.16V.
  

• Will discharge a battery with up to 0.4mA when not powered.
  
• Usb output turns on when load is above 0.5mA and off when load is below.
  
• Cannot be used as a UPS, output turns off when usb power is removed.
  
• Usb output is auto coding with Apple 2.1A as maximum
  
• Weight: 40g without batteries (Batteries will add about 90g), but including usb cable.
  
• Size: 104 × 30 × 25 mm
  

Eizfan NC2 USB Charger





This is a very simple dual slot USB powered LiIon charger.



It arrived in a nice box with specifications on.



The pack contained the charger a usb cable and a instruction sheet.



The charger is powered from micro usb.





On the top is a led for each slot (One led, the 4 part is only design), it is blue while charging and green at other times. If a battery with very low voltage is put into the charger the led will turn off.



Not much easy readable information on the back of the charger, the specifications are embossed in the black plastic.



The charger uses the typical slider construction, it can handle batteries from 32mm to 74mm.





The charger can handle 74mm long batteries, inclusive flat top cells, this means just about all protected cells, even 21700.
The charge current is too high for small batteries.



Measurements charger

• LiIon Batteries will be discharged with less than 0.01mA when power is off.
  
• Charges full LiIon batteries with a few mA when connected to power.
  
• Charger reports full at 4.20V
  
• When battery is below 1 volt the charger will charge with 100mA and the led will be off.
  
• Between 1V and 2.8V the led will be blue and the current will be 0.1A
  
• Above 2.8 volt full charge current will be used.
  
• Charger will restart if battery voltage drops.
  
• Charger will restart charging after power loss, or battery insertion.
  
• Charger uses about 6mA from USB when idle with no batteries.
  

Greetings,

This review will be dedicated to a new Xtart charger, the VP4C.

Link to the charger page on Xtar website

So, what is so interesting about this charger?

Well, the charger is really easy to use, the display is very informative and have great viewing angles. The LED’s above the slots let you know the charging status very clearly, without even getting close to the charger.

Let’s start

The charger comes in a really compact white carton box.

The secret behind such tight packing lies in a really spartan bundle.

User manual. This is one of those rare cases where you can easily skip reading it, using the charger is really easy.

Here it is. Like usual from Xtar, no quality issues here. Please notice that the slots are marked with the current that can be set.

Well, what you see is what you get. A really nice charger, and easy to use too.
The default current is 0.5 A, pressing the button will change it to 0.5 and 0.25. When 4 cells are installed, the maximum current that can be set is 0.5A.
The current and voltage that is displayed matches measured by my DMM.
A green LED above the slots means that the battery is not installed, or the charging process has finished.
Red LED – means charging in progress.
The viewing angles of the display are great, the rails move smoothly.

Conclusion, final words
A very decent, easy to use charger from a respactable manufacturer. If you need an easy to use lithium charger, this one could be a great option.

Greetings,

This review will be dedicated to a new Xtar charger, the Xtar VC4S.

Link to the charger page on Xtar website

Whats so special about this charger?

This is the most advanced charger from Xtar that I ever tested, with the widest array of features.

What am I talking about?

1. This charger can measure batteries capacity. Both during charging, and both using charge-discharge-charge cycle.
2. There is a special mode, for bringing the cell to optimal voltage for storage.
3. A very informative color display, that displays a lot of information – charging current, capacity, internal resistance and more.
4. Maximum current of 3A per slot.
5. The usual stuff that comes from Xtar – batteries “revival”, and more.

Lets start?

The charger comes in a small white carton box.

Here is the secret of the small carton box – the charger comes without power supply. The power supply that is recommended to use should support QC 3.0, other-vice the maximum current will be 2A instead of 3A.

Nothing to add here, looks and feels really nice. No quality issues here.

The left button switches display modes, the right switches operation modes.
As you can see you can see capacity, voltage and internal resistance. The display shows the both the maximum charging current setting and the actual current (in mA).
The maximum charging current per slot is 3A, if the cell has low internal resistance and QC 3.0 charger is being used. But if you switch to a charger that does not support QC, the maximal current drops to 2A per slot.

Here is the user manual

Battery storage mode. The charger charges or discharges batteries in order to set the optimal voltage for storage. For ni-mh I measured 1.26-1.31 volt, and for lithium 3.7 volt, after the “store” process completed. You cannot set charge/discharge current. I measured a discharge current of 0.3A.
An easy calculation of 0.3А Х 4 volt Х 4 cells= 4.8W ~5W. this should be the power that the charger needs to dispose when discharging 4 lithium cells. The cooling is passive. I measured 72 degrees Celsius when discharging 4 lithium cells, and 64 when discharging 3.
The voltage and current matches the voltage and current measured by my UNI-T 61E.
When cells are not installed, you can measure 8.4V on the contacts.

Battery “grading” mode – measuring the capacity by charge-discharge-charge cycle, the capacity is measured during discharge. The process will take a while, as the discharge current is limited to 300ma.
The nice thing about the charger – you can set it to “store” or “grading” modes, and it will stay at those modes, until you switch modes or you power cycle the device.
What I mean is that you don’t have to press any button to initiate the “special” modes, once set – simply putting in the battery will initiate the process.
The lithium cells are charged to 4.20 volt, ni-mh to 1.5 volt. From what I saw, for ni-mh the charging process is terminated by voltage, not delta-V.

Final words, conclusion

I really liked the charger. It combines advanced features with ease of use and comes from a respectable manufacturer.

Eizfan WF1 LCD Universal Charger





Eizfan is a company selling chargers and batteries branded EFAN and Eizfan.



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



The box contained the charger, a power supply, a car adapter and a instruction sheet.



The charger has a single 12V input for use with the power supply and car adapter.





The user interface is a small display and a single button.
The button can be used to select current and activate usb output.



The display shows voltage with two decimal places and animated battery symbols when charging.
When USB out is turned on it will show the battery voltage for a short time.



Background light can be turned off or on with a long press on the button. Default is on when power is connected.
Like many other chargers it is missing a dedicated battery full indicator, you have to look at the animation. It will stop with all blocks in the battery shown, when the battery is full.



Without batteries in the charger only the current is shown.



The charger has a usb output connector, that can be used with one or both batteries.



The slots uses the typical design with a slider with metal rails. The slots can accept batteries from 31 to 70.9 mm.










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



Measurements

• Power consumption when idle is 0.6 watt from mains.
  
• Below 0.3 volt the charger will apply 1mA charge current and display will be off (Except for current selection).
  
• Above 0.3 volt the charger will apply regular charge current.
  
• Between 2V and 2.5V the charger will charge with normal current, but the battery symbol will flash
  
• Above 2.5 volt charger assumes LiIon battery.
  
• Maximum voltage readout is about 4.25 volt.
  
• Charger will restart if voltage drops to 3.9 volt.
  
• Charger always starts with 0.25A charge current.
  
• Voltmeter shows within 0.02 volt when voltage is above 0.8V.
  
• Charge will restart charging after power loss, or battery insertion.
  
• It is possible to change current during charge.
  
• When charging is finished the charger will apply 0.2mA charge current.
  
• The background light stays on when the charger is powered, except if manually turned off.
  
• When not connected to power it will drain about 10mA from a LiIon battery, but only 0.1mA from a NiMH battery.
  

• Output is coded as Apple 1A
  
• Output is manually turned on/off with the button on the charger
  
• Display shows voltage and animated battery shortly when output is turned on.
  
• With usb output turned on but not connected to anything the current draw is 30mA with display on and 13mA when display turns off.
  
• Voltmeter is within 0.07V in usb mode.
  
• Output cannot be activated when charger is connected to power.
  
• Both batteries can be used for usb output.
  

Eizfan X6 LCD charger



This is a 6 slot charger from Eizfan (Efan) with a good selection of charge currents and support for both LiIon and NiMH, making it fairly universal.

I got the charger in a cardboard box, if has a good picture of the charger and specifications on the back.

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

The power supply is a standard plug pack.

The charger has a 12V input on the back.

And a usb output on the side for power bank usage.

The charger uses a LCD display for user interface.

Together with a single button on the back of the charger. This button will change current, turn power bank on/off and turn display on in power bank mode.

All segments are shown during power on.

No batteries in the charger, 0.5A current selected.

Charging on battery with 1A, the battery symbol is animated while charging.

The charger has specifications on the bottom.

The charger has the usual slider construction. It can handle from 31mm to 71mm, this is most common cells on the market.




The 0.5A current is a bit high for many 10440 cells. The 4A current is only for cells rated for high charge current.
Measurements charger

• Without power it will discharge a LiIon battery with up to 0.7mA
  
• Without power it will discharge a NiMH battery with less than 0.2mA
  
• A full LiIon battery will be charged with 0.6ma
  
• The current settings are 0.5, 1A, 2A for both LiIon and NiMH.
  
• LiIon also has a 4A current setting, that charges with about 3A.
  
• Power consumption when idle without batteries is 0.8 watt.
  
• Below 0.3V the charger will not detect a battery
  
• Up to 2V the charger assumes NiMH
  
• Above 2.1V the charger will assume LiIon and use selected current.
  
• Below 0.8V the voltage is very unprecise.
  
• With NiMH the voltmeter will not show above 1.55V.
  
• The voltmeter is within 0.03V
  
• Can charge 2 LiIon batteries at 4A (3A).
  
• Can charge 3 LiIon batteries at 2A.
  
• Can charge 1 to 3 NiMH batteries at 2A
  
• Above 3 batteries maximum charge current is 1A.
  
• The voltmeter will freeze when battery is full.
  
• Charger will not restart if battery voltage drops
  
• The charger will restart when a battery is inserted or power is cycled.
  

• Without power it will discharge a LiIon battery with 38mA when the power bank is on and unloaded with display off (83mA with display on).
  
• Usb output is off when the charger is powered.
  
• Display is on and shows voltage when using usb out, but backlight will turn off (Press button to turn on).
  
• Press button to turn USB output on/off.
  
• USB output is coded as Apple 2.1A
  

Eizfan C2 USB Charger, USB supplement

This review will only be about the USB output, i.e. power bank function in the charger.
Read the original review for charge functions here
I first charger I got had a production fault and the USB output did not work. Eizfan shipped a new charger to me and this time the USB output worked.
Power bank

• USB output is coded as Apple 1A
  
• USB output will turn off after 10 seconds with less than 80mA load
  
• Battery drain is below 0.1mA when USB output turns off.
  

Golisi L2 Compact Mini Charger


A 2 channel universal charger from Golisi.

It arrived in a white cardboard box with specifications on.

The box included the charger, a USB cable cable, a pouch and the instruction sheet.

Charger and cable fits in the pouch.

The charger has a micro USB power input.

The user interface is one button and a couple of leds.

There is 3 green and 2 red/green leds.

The top row shows charge current, hold down the button when a LiIon battery is charging to change current.
The bottom leds will be red when charging and green at other times.

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 32.5mm to 71.2mm. This covers unprotected batteries, but some protected will be too long.



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

• Discharge LiIon battery with 0.03mA when not connected to power.
  
• When power is connected with a full battery, it will charge with about 0.5mA.
  
• Below 0.1 volt the charger will report error and charge with 3mA
  
• Below 1.6V the charger will assume NiMH and charge with 0.5A
  
• Above 3V the charger will assume LiIon.
  
• Initial current is always 0.5A
  
• A single LiIon can be charged with 2A
  
• One or two LiIon can be charged with 0.5A and 1A
  
• One or two NiMH can only be charged with 0.5A
  
• Charger will not restart when voltage drops.
  
• It will restart charging on reinsertion of the battery or power cycling.
  
• Power consumption when idle without battery is 7mA from USB
  

Panasonic BQ-CC75


This is a easy to use and slow charger from Panasonic, it has a build-in USB charger.

I did not get the original box with the charger.

The pack included the charger, mains cable and instruction/safety sheet in a lot of languages.

The charger is powered directly from mains and do not have other power options.

The only user interface is a couple of leds, one for USB and four for charging.
All leds are green and the leds for batteries are green when charging, flash when there is an error and turned off at all other times.
The USB led is green when there is a plug in the USB connector.

There are some specifications and warnings on the back of the charger, but they are very hard to read. It says BQ-CC75A here.

The usb output is clearly marked with voltage and current.

The charger has the typically two level slots used for AA and AAA batteries.


Measurements charger

• When not powered it will discharge the battery with below 0.1mA
  
• The charger will not charge batteries below about 0.6V
  
• If the charger detect an error the green led will flash
  
• The charger use peak currents up to 1.2A
  
• The charger will timeshare one charge circuit between all four slots.
  
• Charge will restart charging after power loss, or battery insertion.
  
• Power consumption when idle is 0.07 Watt
  

• Power consumption when idle is 0.07 Watt
  
• USB output is coded as USB charger (DCP)
  
• USB connector will detect a connected cable physically and turn on the USB indicator.
  
• When a USB connector is plugged in the battery charger part is disabled.
  

ISDT N8


ISDT has a line of large chargers, this is the smallest version with 8 slots, the others are 16 slot and 24 slot. They support a lot of battery chemistries, but the battery size is limited to AA/AAA batteries.




I got the charger in a cardboard box with a picture of it, but no specifications.

The pack included the charger, a usb cable and a instruction sheet. The instruction sheet is for all 3 N chargers.

The charger is usb powered and can use either normal USB or QC.

The user interface is a color LCD screen, a multicolor led for each slot and 3 touch buttons on the right side. The buttons are up/down and select/enter, the select/enter needs a long press to show the menu.

There is a lot of information on the screen, both about the batteries (one at a time), actual mode and input power.

The charger has a special “Activation Charge” mode, this means the battery will be discharge before it is charged. The % rating is a bit on the silly side and it is not because I have selected NiMH instead of Eneloop!
The curve do not show from start to finish, but only the last maybe two hours of the program.

A long “press” on the center button will bring up the menus, this does not suspend the current operation. Selection will first be activated when “Back” is touched.

Some of the selections in the menus. The current can be selected from 0.1A to 1.5A in 0.1A steps for charging. For discharging the maximum is 1A.

With this charge the software version is not a single piece of software.



Most of the charger body is made in metal.


The slots are the common two level AA/AAA slots with mechanical polarity protection, this also prevents the charger from handling flattop batteries.


Only unprotected button top cells will fit.
Measurements charger

• From USB the charger reports 10W available (2A).
  
• Power consumption from USB when idle is 130mA with display on and 95mA with display off.
  
• Uses 12V from QC and reports 18W available (1.5A).
  
• Power consumption from QC 12V when idle is 70mA with display on and 55mA with display off.
  
• Display will automatic turn off after some time when the charger is idle.
  
• All slots uses the same settings
  
• Supported chemistries: NiMH, Eneloop, NiCd, NiZn, LiIon, LiIonHV
  
• Functions: Charge, Charge with refresh for NiMH/NiCd, Discharge, Activation, Analysis
  
• Without power it will not discharge a batteries with any significant current
  
• The charger will remember last settings and use them next time it is powered on.
  
• The charger supports firmware update.
  
• The charger has an automatic mode that can handle NiMH, NiCd, LiFePO4 and LiIon
  

Charger Xtar VC4S


The is a automatic charger for LiIon and NiMH batteries, it also has a test function and a store function. The automatic part means battery chemistry and charge current is selected automatically, user cannot affect them.

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

Inside the box is a fabric bag with the charger in, this bag can be useful for traveling and to keep the manual, charger and cable together.

The bag contained the charger, a USB cable, a warranty card and a instruction sheet in many languages.

The charger is USB powered, it can work with either regular USB or a Quick Charge supply, I will recommend using a QC supply.

There is a display, some red/green indicators (Not visible on the picture) and two buttons. One button to select display function (Show Capacity, current, IR) and the other to select mode (Charge, Grade, Store).

During power on all the segments is shown.

Charger ready with no batteries in it.

Charging one NiMH and two LiIon batteries.

The specifications on the back of the charger is nearly unreadable

The charger uses the sliding connections style and will work with batteries from 30mm to 70.3 mm long, i.e. protected 20700 will not fit and a few very long protection 18650 may also have problems.





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

• Charger uses QC2 at 9V and may draw 2A, i.e. 18 Watt, when idle it only uses 5V
  
• Power consumption when idle is about 200mA at 5V with display at high, 64mA with display at low and 47mA with display off.
  
• When charging the last digit in the capacity displays will flash.
  
• At 0V the charger will report “Err”.
  
• Above 0V the charger will guess NiMH and start charging, this guess may be changed to LiIon if the battery voltage reaches LiIon levels.
  
• Below 1.8V the charger assumes NiMH.
  
• Above 1.8V the charger assumes LiIon.
  
• Below 3.0V charger will only charge LiIon with 0.3A, but display may show 3A.
  
• When charge is finished the charger will charge with 0.1mA.
  
• Charger will restart if voltage drops to 3.9 volt.
  
• Charge will restart charging after power loss, or battery insertion.
  
• When not connected to power it will drain about 1mA from a LiIon and 0.1A from a NiMH battery.
  
• Current dial will show maximum possible charge current, not actual charge current use “Cur” display for that.
  
• mAh display flashes “Full” when the corresponding battery is full and the LED is green.
  

Charger Xtar VP4C


This is a LiIon only charger from Xtar, it is USB powered and has 3 selectable currents.

The charger comes in a cardboard box with lots of specifications on it.

In the box is the charger, a USB to barrel connector cable and a instruction sheet.

The power cable with USB and barrel connector, I am not a fan of this type cable, but prefer USB to USB.
Both the cable and the charger are 5.5mm/2.5mm connectors.

The charger has a DC connector for power input for a maximum of 2A current from USB.


There is a red/green led above each slot, they will be red while charging and green at other times.

The display and the current select button. Hold down the button to turn the display off.

The center part of the display shows current, watch out, the charger will automatic adjust it when loading batteries.

Charging two batteries at 0.5A

The back of the charger clearly list the specifications.

The slots have raised battery connections, i.e. flat top batteries can be used. The slider works very smooth and can take batteries from 30.5mm to 71.3mm. This is enough to handle most protected xx650 batteries, but not protected xx700 batteries.

The slots are marked with possible charge currents.




The charger can easily handle 70 mm long batteries, inclusive flat top cells.
Measurements

• Discharges LiIon with 2mA when not connected to power
  
• Charger will not charge or discharge a full battery when power is on.
  
• Below 1 volt the charger will charge with 3mA, the display will be empty and the led green.
  
• Between 1 and 2.9 volt the charger will charge with between 50 and 75mA, the display will show voltage and the led will flash red.
  
• Above 2.9 volt regular charge current is used.
  
• In the regular charge range the voltmeter is within 0.02 volt.
  
• The meter will not show above 4.20V, but will show the voltage drop when charging terminates.
  
• Will restart if battery voltage drops below 3.9 volt.
  
• Charge will restart charging after power loss or battery insertion.
  
• If any battery is placed in either of the two center slots, the maximum charge current is reduced to 0.5A (A full battery in either center slow will also reduce the current).
  
• When charger is powered on display shows 0.5A charge current, but charger will automatic change to 1A if a battery is put in slot #1 or #4.
  
• Charger will automatic change charge current when removing or inserting batteries, always select current when battery is in charger.
  
• Current select button will decrease current when pressed, i.e. 1A -> 0.5A -> 0.25A -> 1A
  
• Power consumption when idle is 46mA from USB and 35mA when display is turned off.
  

Charger LiitoKala Lii-S2


This is a universal charger for four chemistries with current selection based on slots and number of batteries.

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

In the box was the charger, a usb cable and a instruction sheet.

The charger is powered from usb.

The user interface is a display and a button for each slot to select chemistry and current.
Chemistry is selected when by a fast press, hold down to change current.

At power on all segments are shown on the display.

Without batteries the display sows null.

A LiIon battery in slot #1.

Charged capacity.

And time used.

NiMh battery in slot #2.

There is a easy readable specification on the back of the charger.

The charger can handle both button top and flat top batteries.
The slider moves smoothly and can hand cells from 32mm to 71mm long.

This charger do not care about polarity, it will detect the actual polarity of the battery and then charger.



The charger can handle 71 mm long batteries, including flat top cells.
Measurements charger

• Power consumption when idle without batteries is 20mA from usb
  
• Below 0.5V the charger will not recognize a battery
  
• Between 0.5V and 1V the charger will charge with lower current
  
• At 1V the charger the charger will assume NiMH and charge with full current
  
• At 1.6V the charger will assume a full NiMH battery.
  
• Above 2V the charger will assume LiIon and ask for chemistry, it will use full charge current.
  
• When charge is finished the main charge it will charge with a few mA
  
• Charger will not restart if voltage drops
  
• Charge will restart charging after power loss, or battery insertion.
  
• When not connected to power it will drain with less than 0.3mA from a battery.
  
• Voltmeter will start at 0.5V where it will show 0.3V
  
• From 0.7V voltmeter is within 0.05V
  
• Voltmeter stops updating when charging terminates.
  
• Maximum voltmeter reading is 3.65V, 4.20V and 4.35V depending on battery chemistry.
  

I am no HJK but here is my take on the new Xtar ST2.

Xtar has introduced their new 2 bay lithium ion based charger and it’s capable of charging 2 cells at 4.1A each from USB-C! It features selectable charging rates too. Thanks to Xtar from sending me this early unit for a quick look and review along with a few high drain batteries to test with.

Full Image Gallery:https://imgur.com/a/CfM55vl
YouTube Version of this Review:

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Packaging
The charger I received was early in the production cycle and didn’t actually come with any of the final retail packaging. The accessories that will be included with the final product are the charger itself, USB-C to C cable, and a USB-A to USB-C cable thats QC3 compliant.

Construction
This charger is designed to charge cells 18650 and larger, primarily 18650, 18700, 20700, 21700, and 26650 batteries. To accomplish this Xtar made a few design changes. Instead of the positive end of the batteries facing the power plug, now the positive end faces the screen which is 180 degrees from pretty much all other chargers. Thankfully this is molded into the fire resistant plastic. They also designed the sliders (at the top) so no smaller batteries will fit, 18650’s are the minimum size. This charger should also charge protected 21700’s. Minimum size the charger accepts is 60mm, and maximum is 77mm. The charge now has temperature sensors on each bay in little metal pads that make direct contact with the batteries.

The sides pick up the blue theme with accents and the entire thing is made of soft touch flame retardant plastic. There are vents on the back and bottom of the charger to aid in cooling. Overall it’s made pretty well and feels solid.

As noted before the screen on this charger is on the bottom of it, and while the screen part itself is fairly small. Text is large enough and very clear. The background is a nice deep blue and text is white. The display shows the current voltage of the cell, Percentage of charge, charging speed, and temperature of the cell in centigrade. When you first plug in the charger it will do a test and show the resistance of the cell.

Below the screen you do have two buttons for each charging slot. These control the charging speed of each slot, with your options being 1A, 2A, or 4.1A. If you hold the button for 1.5 seconds the backlight and LED will turn completely off for night charging, although the red and green LED indicators (Charging/Charged) will stay on. The backlight will go to sleep after a few second under normal operation.

Here are some photos of the interior of the charger. My only concern is that the wires to the temperature sensor are very thin and I could see these potentially getting caught in the spring or mechanism.

Rather then read out the input and output specs I will throw a picture in here.

Charging via QC3
When charging via QC3, the charger is not capable of charging 2 batteries at 4.1A each. Instead it will charge 2 batteries at a maximum of 2A each. If you drop down to one cell it will charge at 4.1A. There is no indicator on the screen what your power source is, if it’s QC2 or QC3.

Charging via USB-C!
For maximum performance across both bays, the best thing is to use a power supply that capable of at least 40W (measured at the wall) or more via USB-C PD. I used my Innergie 60C charger for my testing because it’s the only USB-C charger I have that could deliver enough power. I tried my Xtar EU4 with USB-C but when loading up 2 batteries it would shut off when I tried to charge both at 4.1A.

When charging 2× 21700 batteries at 4.1A each at the start the charger was drawing 40W @ 0.74A at the wall. The cells started off at 24C. At 7% charger they had heated up to 30C. At 25% charge they were 45C and this was as hot as the charger reported things as getting, and my infrared thermometer measured similar temps. Total time to charge both 4000mAh 31700 batteries from 3.5V to 4.2 was 1 hour 25 minutes. Terminating voltage was 4.188V

When charging both cells at 2A, I measured a total of 22W of power at the wall, and when charging both at 1A I measured 12W at the wall. These lesser power modes could easily allow you to charge off lesser capable power supplies or using QC3.

Pro’s

• USB-C PD! Finally we have a charger utilizing USB-C and PD. QC3 is also an option with a A to C cable.

• Speed, this is one of the fastest chargers on the market, able to charge at 4.1A on each bay simultaneously. Great for those high capacity 21700’s and 26650’s if you need the speed.

• Selectable Charger Rate, this is something we need from Xtar’s other chargers such as the X and VC series chargers.

• Direct and continuous measurement of the temp of the battery, great for safety when charging at such high rates.

Con’s

• When using USB-C you must plug the charger in first then insert the batteries.

• Cell orientation is backwards from most other chargers with positive terminal facing the user.

• Unit shuts off when not receiving enough power (USB-C) instead of charging slower or giving a warning. This is kind of frustrating sometimes.

• Larger Lithium batteries only, Unfortunately this isn’t a perfect one stop charger because it doesn’t support Ni-HM cells or smaller Lithium ion like 18350 or 14500.

Conclusion
It’s nice to see a charger finally use USB-C PD and have a battery charger from Xtar that allows you to change the speed of the charge too. The ST2 look a lot like the Xtar Over Slim 4 and has similar specs but with a USB-C input and no USB outputs.

To take advantage of the speed of this charger you really need to use USB-C power supply, and it needs to have a fairly large power output. My Xtar EU4 can put out about 45W on USB-C but that wasn’t enough to charge both cells at 4.1A and the charger shut off, and only my 60W charger was enough.

That said, in most applications I don’t recommend charging your larger batteries at 4.1A each, while it’s safe it does heat them up and causes some unnecessary wear and tear, and shortens they life by a small amount. This would be good for a quick top up if speed was necessary or maybe a boost early on in the charging and then turn down the speed as you go. This fast of charging should only be done on high drain batteries. So at 2A charging this charger needs a much less demanding power supply and this is where QC3 or a more modest USB-C charger comes into play.

This is a good charger for those looking for full USB-C support and outright charging performance in a small package and don’t mind not being able to charge smaller then 18650 lithium batteries or Ni-HM cells.