Test/review of Golisi L2 Compact Mini Charger

1 post / 0 new
HKJ
HKJ's picture
Offline
Last seen: 7 hours 48 min ago
Joined: 05/24/2011 - 12:23
Posts: 6922
Location: Copenhagen, Denmark
Test/review of Golisi L2 Compact Mini Charger

Golisi L2 Compact Mini Charger
DSC_5152
DSC_5153 DSC_5154
A 2 channel universal charger from Golisi.
DSC_5033 DSC_5034 DSC_5035 DSC_5036
It arrived in a white cardboard box with specifications on.
DSC_5151
The box included the charger, a USB cable cable, a pouch and the instruction sheet.
DSC_5150
Charger and cable fits in the pouch.
DSC_5156
The charger has a micro USB power input.
DSC_5157
The user interface is one button and a couple of leds.
DSC_5254
There is 3 green and 2 red/green leds.
DSC_5253
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.
DSC_5155
On the bottom of the charger there are specifications.
DSC_5159 DSC_5160
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.
supportedBatteryTypes
supportedBatterySizes DSC_5163 DSC_5164 DSC_5165
DSC_5166 DSC_5167 DSC_5168 DSC_5169 DSC_5170 DSC_5171
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

Charging LiIon
Golisi%20L2%201A%20%28SA18650-33%29%20%231
The charge curve is a nice CC/CV curve with about 140mA termination current.
Golisi%20L2%201A%20%28SA18650-33%29%20%232
The second slot is similar.
Golisi%20L2%201A%20%28SA18650-26%29%20%231
Golisi%20L2%201A%20%28PA18650-31%29%20%231
These two batteries are also handled nicely.
Golisi%20L2%201A%20%28BE18650-26%29%20%231
With this older cell the CV phase is, as expected, reached earlier.
Golisi%20L2%200.5A%20%28SA18650-33%29%20%231
The charger is slightly unstable at 0.5A, but it do not affect the charging or the result, termination current is about the same.
Golisi%20L2%200.5A%20%28AW18350-IMR%29%20%231
It can also handle my old and worn down cell.
Golisi%20L2%200.5A%20%28KP14500-08%29%20%231
A more regular small cell is charged nicely.
Golisi%20L2%202A%20%28SA18650-33%29%20%231
Golisi%20L2%202A%20%28AP18650-26%29%20%231
Golisi%20L2%202A%20%28SA20700-30%29%20%231
One cell can be charged at 2A, at least initially, when the voltage one the cell reaches about 3.8V the current is reduced (This is very common on USB chargers). The cell is charged faster than at 1A.
Golisi%20L2%201A%20%282xSA18650-33%29
Two batteries at 1A works fine and fairly fast.
Golisi%20L2%201A%200.5ohm%20%282xSA18650-33%29
Using a 0.5ohm resistor in series with the USB power to simulate a weak charger or long cable slow down the charger significantly, but do not prevent it from charging the cells.
Temp6533
M1: 39.9°C, M2: 41.4°C, M3: 43.6°C, HS1: 61.4°C
Temp6534
HS1: 59.4°C
PoweronLiIon
The charger needs less than 2 seconds to initialize.
CurrentChangeLiIon
Current can only be changed during charging.
Charge%20Solar%20LiIon
The charger had a single dropout during this test and it need some time to adjust current when voltage increases, this means there will be rather large peak currents into the battery.
Charging NiMH
Golisi%20L2%200.5A%20%28eneloop%29%20%231
The charge curve looks fine and the termination looks like a -dv/dt or 0dv/dt
Golisi%20L2%200.5A%20%28eneloop%29%20%232
Here it is looks like voltage termination, but the voltage is lower than above? The battery is a bit below fill, but not that much.
Golisi%20L2%200.5A%20%28eneloopPro%29%20%231
Golisi%20L2%200.5A%20%28leise25%29%20%231
Both the EneloopPro and Leise has good termination
Golisi%20L2%200.5A%20%28eneloopAAA%29%20%231
The AAA also looks fine.
Golisi%20L2%200.5A%20full%20%28eneloop%29%20%231
A full battery needs some time to be detected due to the -dv/dt termination.
Golisi%20L2%200.5A%20%282xeneloop%29
No problems with two batteries.
Temp6541
M1: 32.0°C, M2: 32.7°C, M3: 32.3°C, HS1: 46.4°C
PoweronNiMH
NiMH also initializes in less than 2 seconds.
ChargingNiMH
With NiMH the current is turned off to check the voltage.
Charge%20Solar%20NiMH
Here the charger hand more problems with recovering after a low voltage situation and again it had some very high current spikes.
Conclusion
The charger is good to charge both LiIon and NiMH, but I could have wished for an options for higher charge current with NiMH.
That the charger always starts at 0.5A makes it fairly fail safe.
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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/