Golisi i2

DSC_4103

DSC_4104 DSC_4105

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

DSC_4079 DSC_4080 DSC_4081 DSC_4082

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

DSC_4099

The box included a bag for the charger.

DSC_4100

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

DSC_4106

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

DSC_4107

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

DSC_4517

All segments on the display.

DSC_4518
DSC_4519
DSC_4520

The 3 different readouts.

DSC_4521

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

DSC_4110

On the bottom of the charger there are specifications.

DSC_4108 DSC_4109

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.

supportedBatteryTypes

supportedBatterySizes DSC_4545 DSC_4546 DSC_4547

DSC_4551 DSC_4552 DSC_4553


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




Measurements

Charging LiIon

Charge current is 1A or 2A for one cell (depends on slot) and 1A for two cells.

Golisi%20i2%202A%20%28SA18650-33%29%20%231

The simulated CC/CV charge curve is nice, but 2A is a bit high for this cell.

Golisi%20i2%201A%20%28SA18650-33%29%20%232

Moving to the second slot reduces the charge current to 1A, but the termination is around 250mA.
Due to the charge algorithm the cell ends up very close to 4.2V
Display shows: 2990mAh in 3:15


Golisi%20i2%202A%20%28SA18650-26%29%20%231

Display shows: 2498mAh in 2:02

Golisi%20i2%202A%20%28PA18650-31%29%20%231

I did these two at 2A and they where charged fine.
Display shows: 2674mAh in 1:55

Golisi%20i2%202A%20%28BE18650-26%29%20%231

I even tried this old cell at 2A, the current dropped fast and the charger do not use a too high charge voltage. The end result is fine.
Display shows: 2018mAh in 2:21

Golisi%20i2%201A%20%282xSA18650-33%29

With two cells I am down to 1A on both cells and the charger uses a bit above 2A from usb.

Golisi%20i2%201A%20%282xSA21700-30%29

My high current 20700 cells were also charged fine.
Display shows: 2791mAh in 2:53 and 2827mAh in 2:55

Golisi%20i2%201A%200.5ohm%20%282xSA18650-33%29

Adding a 0.5ohm resistor in series with the power simulated a weak usb supply or long usb cable, the charger works slower, but will charge the cell.

Temp4896

M1: 36,2C, M2: 36,8C, M3: 37,7C, HS1: 59,6C

Temp4897

M1: 43,9C, HS1: 67,8C

PoweronLiIon1A

The charger needs about 7 seconds to initialize. Notice the pulses during charge, it looks like this charger use some sort of simulated CC/CV, this do also fit with the final charge voltage that varies slightly.

PoweronLiIon2A

The 2A looks the same.

ChargeLiIon1A

LiIon stops at regular intervals to check the voltage.

Charge%20Solar%20LiIon

This charger can lock up with unstable voltage.



Charging NiMH

Charge current is 1A for one NiMH and 0.5A for two NiMH

Golisi%20i2%201A%20%28eneloop%29%20%231

This is a nice -dv/dt (or maybe 0dv/dt) charge curve, that stops when the battery starts getting warm.
Display shows: 1886mAh in 2:01

Golisi%20i2%201A%20%28eneloop%29%20%232

Same on the second channel.
Display shows: 1907mAh in 2:02

Golisi%20i2%201A%20%28eneloopPro%29%20%231

The Pro is also handled nice.

Golisi%20i2%201A%20%28powerex%29%20%231

The powerex is starting to get old, but the charger has no problem with it.
Display shows: 2927mAh in 3:07

Golisi%20i2%201A%20%28eneloopAAA%29%20%231

The AAA is charged at a slightly high current, this gives a very obvious -dv/dt signal for the charger to stop on.
Display shows: 792mAh in 0:50

Golisi%20i2%201A%20full%20%28eneloop%29%20%231

As usual -dv/dt termination is slow to detect a full cell, here the charger uses about 13 minutes.
Display shows: 194mAh in 0:12

Golisi%20i2%200.5A%20%282xeneloop%29

With two cells the charge rate is only 0.5A, but the termination works fine.
Display shows: 1774mAh in 3:37 and 1698mAh in 3:27

Temp4904

M1: 34,3C, M2: 34,2C, M3: 36,1C, HS1: 47,9C

Temp4905

M1: 38,3C, HS1: 49,3C

PoweronNiMH1A

NiMH needs about 5 seconds to initialize.

ChargeNiMH1A

As usual with NiMH chargers the charging is pulsed, here the voltage is checked each 10 seconds.

ChargeNiMH0.5A

With two cells in the charger it looks like there is a time offset between the two pauses, due to the slightly higher current just after the pause.

Charge%20Solar%20NiMH

With NiMH the there is a risk of locking up with unstable voltage supply, and the current regulation do not like a fast voltage increase.



Conclusion

The charger handles LiIon and NiMH fine, but because the minimum current for LiIon is 1A it is not good for smaller LiIon cells. I like it has capacity and voltage display, but the digits are rather small.

The charger is good, but I miss a current selection.



Notes

The charger was supplied by Golisi for review.

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