Zanflare C4

DSC_0481

DSC_0482 DSC_0483

Zanflare is a new name in chargers and starts with an analyzing charger. It can handle LiIon and NiMH at a few different currents. The user interface is very simple and easy.

DSC_0372 DSC_0373

It arrived in a cardboard box with and image of the charger and not much more.

DSC_0477

The box included the charger, a mains adapter, a car adapter and the instruction sheet.

DSC_0484

The charger has a 12V input and a usb output connection, on the bottom of the charger it says the usb output is rated at 2A.

DSC_0486

The user interface is a lcd display and 6 buttons.
The 4 round buttons select display for that slot (mA, Volt, mAh, mR(Internal resistance), Time)
The MODE button select between charge, fast test and NOR test.
The CURRENT button select the charger or discharge current depending on mode.

DSC_0586
DSC_0587

The display is simple and easy to read.

DSC_0485

As usual there are specifications on the bottom, but they are not easy to read.

DSC_0487 DSC_0488

The slots uses the classical slider construction and it works fine.
The slots can work from 30.7 mm to 70.3mm. This means that it will not handle the longest 18650 and 26650

supportedBatteryTypes

supportedBatterySizes DSC_0553 DSC_0554 DSC_0555

DSC_0556 DSC_0557 DSC_0558 DSC_0559 DSC_0560 DSC_0562 DSC_0561

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



Measurements


Charging LiIon

It is possible to select 300, 500, 700 and 1A in charge current.

Zanflare%20C4%201A%20%28SA18650-33%29%20%231

A nice CC/CV charge curve with termination around 200mA. It is probably a simulated CC/CV curve, i.e. the termination current will vary depending on cell.
Display shows 3263mAh 90mOhm 4:02 hours

Zanflare%20C4%201A%20%28SA18650-33%29%20%232
Zanflare%20C4%201A%20%28SA18650-33%29%20%233
Zanflare%20C4%201A%20%28SA18650-33%29%20%234

The other channels works the same way.
Display shows 3328mAh 300mOhm 4:19 hours, 3352mAh 364mOhm 4:22 hours, 3327mAh 168mOhm 4:06 hours

Zanflare%20C4%201A%20%28SA18650-26%29%20%231
Zanflare%20C4%201A%20%28PA18650-31%29%20%231

The two other cells also charge as expected.

Zanflare%20C4%201A%20%28BE18650-26%29%20%231

The old cell is handled very nicely.
Display shows 2316mAh 296mOhm 3:56 hours

Zanflare%20C4%200.3A%20%28SA18650-33%29%20%231

Zanflare%20C4%200.7A%20%28SA18650-33%29%20%231

Both 300mA and 700mA looks fine.
Display shows 3419mAh 208mOhm 13:18 hours, 3293mAh 108mOhm 5:29 hours

Zanflare%20C4%200.5A%20%28AW18350-IMR%29%20%231

The charger stops a bit early with this old worn down cell.
Display shows 258mAh 494mOhm 0:50 hours

Zanflare%20C4%200.5A%20%28KP14500-08%29%20%231

No problem with this cell.
Display shows 777mAh 288mOhm 1:57 hours

Zanflare%20C4%201A%20%284xSA18650-33%29

No problem charger 4 cells simultaneous.

Zanflare%20C4%201A%2012V%20%28SA18650-33%29

Or is there, the power supply is rated for 1.5A, but the charger uses 1.7A. Obvious it works fine enough, but the power supply is at the limit for a short time during a charge.

Temp4383

M1: 36,5C, M2: 38,7C, M3: 39,2C, M4: 37,3C, M5: 39,6C, M6: 43,3C, HS1: 53,7C

Temp4384
M1: 35,3C, HS1: 43,1C

PoweronLiIon

The charger always do a internal resistance check when a battery is put into a slot or when powered on with a battery in it.
When no buttons are pressed it will start charging at 0.5A after about 9 seconds.

Charge1ALiIon

During charge there are pauses to measure voltage.



Fast test of LiIon

It is possible to select 300 or 500mA discharge and charge current.

Zanflare%20C4%20fast%200.5A%20%28SA18650-33%29%20%234

The charge will discharge the battery and then measure how much current is needed to full charge the battery.
Display shows 3379mAh 180mOhm 14:50 hours



NOR test of LiIon

It is possible to select 300 or 500mA discharge and charge current.

Zanflare%20C4%20NOR%200.5A%20%28SA18650-33%29%20%231

The charge will first charge the battery, then discharge while measuring capacity and finally charge again.
It discharges to about 2.8V with constant current, i.e. no pwm.
Display shows 3369mAh 288mOhm 21:51 hours

Zanflare%20C4%20NOR%200.5A%20%28SA18650-33%29%20%232
Zanflare%20C4%20NOR%200.5A%20%28SA18650-33%29%20%233
Zanflare%20C4%20NOR%200.5A%20%28SA18650-33%29%20%234

The other channels looks the same.
Display shows 3537mAh 202mOhm 22:41 hours, 3335mAh 120mOhm 21:26 hours, 3403mAh 216mOhm 22:13 hours

Zanflare%20C4%20NOR%200.3A%20%28SA18650-33%29%20%231

The 300mA setting will reduce both charge and discharge current.
Display shows 3374mAh 572mOhm 37:38 hours

Zanflare%20C4%20NOR%200.5A%20%284xSA18650-33%29

With 4 batteries the temperature will increase when discharging.

Temp4392

M1: 40,4, M2: 41,2, M3: 41,3, M4: 39,8, M5: 61,7, M6: 55,0, HS1: 65,3

Temp4393

M1: 43,6, HS1: 61,2



Measuring internal resistance of LiIon

IRLiIon

The internal resistance measurement looks very stable in values and fairly precise. The resolution looks to be 2mOhm



Charging NiMH

It is possible to select 300, 500, 700 and 1000mA charge current.

Zanflare%20C4%201A%20%28eneloop%29%20%231

With NiMH the charger will terminate on voltage or -dv/dt as can be seen on some of the other curves.
The termination is just about where the battery start developing heat.
Display shows 1904mAh 108mOhm 2:03 hours

Zanflare%20C4%201A%20%28eneloop%29%20%232
Zanflare%20C4%201A%20%28eneloop%29%20%233
Zanflare%20C4%201A%20%28eneloop%29%20%234

The other 3 channels looks the same.
Display shows 1930mAh 284mOhm 2:03 hours, 1852mAh 180mOhm 2:00 hours, 1847mAh 136mOhm 1:59 hours

Zanflare%20C4%201A%20%28eneloopPro%29%20%231

With the pro cell it uses -dv/dt termination.
Display shows 2761mAh 174mOhm 2:59 hours

Zanflare%20C4%201A%20%28eneloopXX%29%20%231

This cell is old and worn down, but it do a very fine job on charging it.
Display shows 1229mAh 316mOhm 2:26 hours

Zanflare%20C4%201A%20%28powerex%29%20%231

This is also a good charge.
Display shows 2830mAh 566mOhm 0:04 hours

Zanflare%20C4%200.3A%20%28eneloop%29%20%231

Even at 0.3A it can terminate a NiMH charge, it may use 0dv/dt termination for this.
Display shows 1982mAh 154mOhm 7:24 hours

Zanflare%20C4%200.7A%20%28eneloop%29%20%231

No problems at 0.7A
Display shows 1901mAh 210mOhm 2:52 hours

Zanflare%20C4%200.5A%20%28eneloopAAA%29%20%231

The AAA cell is charged fine at 0.5A
Display shows 808mAh 400mOhm 1:45 hours

Zanflare%20C4%201A%20full%20%28eneloop%29%20%231

It is fast to detect a full cell, it only requires 5 minutes.
Display shows 31mAh 210mOhm 0:04 hours

Zanflare%20C4%201A%20%284xeneloop%29%20%231

The charge maintain full charge speed with 4 NiMH cells.
Display shows 2025mAh 150mOhm 2:10 hours, 2163mAh 106mOhm 2:20 hours, 2118mAh 96mOhm 2:17 hours, 2108mAh 88mOhm 2:17 hours

Zanflare%20C4%201A%20%284xeneloop%29

It needs about 0.9A from the power supply.

Temp4400

M1: 38,1C, M2: 40,6C, M3: 40,3C, M4: 38,6C, M5: 43,8C, M6: 39,1C, HS1: 53,2C

Temp4400

M1: 36,0C, HS1: 44,9C

PoweronNiMH

When the charger see a battery it will measure its internal resistance.
It will automatic start charging a NiMH cell about 10 seconds after power is applied. The default current is 0.5A.

Charge1ANiMH

The charger will pause at regular intervals to measure the voltage.



Fast test of NiMH

It is possible to select 300 or 500mA discharge and charge current.

Zanflare%20C4%20fast%200.5A%20%28eneloop%29%20%231

With the fast test it will discharge the battery and then charge it while measuring the charged capacity.
Display shows 2054mAh 82mOhm 8:16 hours



NOR test of NiMH

It is possible to select 300 or 500mA discharge and charge current.

Zanflare%20C4%20NOR%200.5A%20%28eneloop%29%20%231

The normal test will first charge the battery, then discharge it while measuring capacity and finally charge it again.
The battery is discharged to about 1.05V
Display shows 2006mAh 330mOhm 12:16 hours

Zanflare%20C4%20NOR%200.5A%20%28eneloop%29%20%232
Zanflare%20C4%20NOR%200.5A%20%28eneloop%29%20%233
Zanflare%20C4%20NOR%200.5A%20%28eneloop%29%20%234

The other 3 slots looks the same.
Display shows 1984mAh 188mOhm 12:34 hours, 2023mAh 160mOhm 12:42 hours, 1988mAh 174mOhm 12:24 hours

Zanflare%20C4%20NOR%200.3A%20%28eneloop%29%20%231

The 0.3A setting will reduce both charge and discharge current.
Display shows 2077mAh 138mOhm 22:43 hours

Zanflare%20C4%20NOR%200.5A%20%284xeneloop%29

With 4 cells there is not much heat during discharge.

Temp4408

M1: 35,4C, M2: 37,0C, M3: 36,6C, M4: 35,5C, M5: 39,9C, M6: 38,5C, HS1: 45,1C

Temp4409

HS1: 41,3C

DischargeNiMH

The discharge is with constant current, this curve is rather boring.



Measuring internal resistance of NiMH

IRNiMH

The NiMH internal resistance is also very stable and fairly good.



Power bank function

Zanflare%20C4%20%28SA18650-33%29%20%231%20load%20sweep

The usb output can deliver the rated 2A, but not much more. The output is slightly low at 2A.

Zanflare%20C4%20%282xSA18650-33%29%20load%20sweep

More batteries in the charger do not change the output limit.

Zanflare%20C4%20usb%20out%2010ohm%20%28SA18650-33%29%20%231

The output voltage is stable at 0.5A and with one battery I got about 4 hours. When the battery is empty the output turns off, but it do not remove all load from the battery, the above recording stopped at 2.4V, but a couple of hours later the battery was down to 2.2xV.

Zanflare%20C4%20usb%20out%205ohm%20%28SA18650-33%29%20%231

One cell did also handle 1A output fine.

Zanflare%20C4%20usb%20out%202.5ohm%20%284xSA18650-33%29

At 2A with 4 cells the output was maintained for about 4 hours.

10ohm

At 0.5A the noise is 5mV rms and 62Vpp

5ohm

At about 1A the noise is 28mV rms and 134Vpp

2.5ohm

At about 2A the noise is 28mV rms and 144mVpp, this is very good.

USB%20battery%20drain

I decided to take a closer look at the battery drain with unloaded usb output. As can be seen the drain goes low at about 1.7V, this is rather low for a LiIon battery.
With the curve I started from 4.25V and over 20 minutes I slowly reduced the voltage.


Testing the power supply with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.



Conclusion

The charger does a good job charging both LiIon and NiMH. I like that the test function uses a constant current and the IR function works fine. The mAh display is a bit on the high side.

The usb output can deliver the rated 2A, but it is slightly low in voltage and will discharge battery to a rather low voltage if they are left in the charger.

Generally the charger will drain batteries when it is unpowered, i.e. do never leave batteries in it.

As a charger and analyzer it is good, the usb output works fine, but it discharges batteries too much when used as power bank.



Notes

The charger was supplied by a Gearbest.com for review.

Here is an explanation on how I did the above charge curves: How do I test a charger