HuanGao Universal Dual Channel AC Charger HG-1206W

DSC_0577

DSC_0578 DSC_0579

This is a cheap charger from Fasttech (sku:1192300), it is supposed to charger both LiIon and NiMH batteries, but when I put a NiMH in the charger the led flashed red.

DSC_0576

I got the charger in an envelope, there was no instruction sheet or any accessories with it.

DSC_0584 DSC_0585

The charger is with a foldable US plug.

DSC_0581

But also support 230VAC.

DSC_0580

There is a single red/green led on the charger. The led is red while charging and green at any other times.

DSC_0586 DSC_0587

The charger uses sliders in metal rails and they work fairly well. It can handle batteries from 30mm to 69mm in length.

supportedBatteryTypes

supportedBatterySizes DSC_0593 DSC_0594 DSC_0595 DSC_0596 DSC_0597

The charger can handle 69 mm long batteries including flat top cells.



Measurements charger


HuanGao%20Universal%20Dual%20Channel%20(PA18650-31)%20%231

The charger uses a CC charging (Constant current), there is no CV (Constant voltage) phase. This means there will be a significant voltage drop when the charger terminates, as can be seen here the voltage drop is enough to restart charging.
To get a full charge on the battery the charger uses a rather high termination voltage.
The charging speed is a bit slow.

HuanGao%20Universal%20Dual%20Channel%20(PA18650-31)%20%232

Second channel is the same.

HuanGao%20Universal%20Dual%20Channel%20(SA18650-26)%20%231

Using a cell with less capacity will make the charge faster.

HuanGao%20Universal%20Dual%20Channel%20(PA18650-34)%20%231

And a larger cell means longer charge time.

HuanGao%20Universal%20Dual%20Channel%20(BE18650-26)%20%231

Using an older cell means termination problems due to higher internal resistance. The charger is jumping in and out of charge mode at a fast pace.

HuanGao%20Universal%20Dual%20Channel%20(AW18350-IMR)%20%231

This cell has the same problem, but at a slower rate.

HuanGao%20Universal%20Dual%20Channel%20(KP14500-08)%20%231

And here the charger terminated fine, but will probably restart again soon.

HuanGao%20Universal%20Dual%20Channel%20(2xPA18650-31)

Charging two cells will halve the charge current, this means it need more than 15 hours to charge two 3100mAh cells.

Temp2211

M1: 33,5C, M2: 33,0C, M3: 46,6C, M4: 42,8C, HS1: 79,8C
Somewhere in the charger there is a hot electronic part, but the cells stay cool.

Startup

The charger starts immediately, but it takes a few second to stabilize the current.

StartupDual

It is the same with two cell, except the current is lower (I have changed the current scale).

HuanGao%20Universal%20Dual%20Channel%20load%20sweep

This curve shows the charge current, depending on battery voltage, I started at a low voltage and slowly increased the voltage.
There is not any termination in the 1.5 to 2.0 volt range, where I would have expected a NiMH voltage termination.
It looks like the charger will charge NiMH, but without any termination.


The charger passed an isolation test with 2500 volt, but failed a 5000 volt test, this makes the charger acceptable for 120VAC usage, but doubtful for 230VAC usage.


Conclusion

The charger works and can be use with 120VAC for LiIon, but I do not like the over voltage or the missing CV phase. There is also the doubtful NiMH charging, due to the led flashing red every time I tried, I did not do any test curves.

Basically you get what you pay for: A cheap, not very good charger, but it can be used for LiIon in an emergency.



Notes

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