20S charger , any hack to modify end voltage and/or current output?

[marka-ee]

I'd like to get one of the China metal cased 20S 8A chargers. However, I'd like to be able to modify it so that I can reduce its output current so that when I have time, I can charge at a slower rate for benefit of the life of battery. Has anybody had success in identifying a place to put a variable resistor or something to allow the current to be adjusted? Most of these chargers are fixed voltage fixed current, which is a shame. My budget is $100.

 

[eee291]

This should do what you want it to.

Just found this amazing item on AliExpress. Check it out!
€66.46 30%OFF | 8A 48V 58.4V 72V 60V 67.2V 84V 87.6V Li-ion Lifepo4 Lithium Battery Charger Current Adjust Fast Charge 16S 20S 21S 24S

https://a.aliexpress.com/_EzCCOyF

 

[dominik h]

or spend a little more and have it voltage and current adjustable.
40-88.2V 2-10 or 2-15A charger

Pics from inside the 15A Version

 

[marka-ee]

or spend a little more and have it voltage and current adjustable.
40-88.2V 2-10 or 2-15A charger

Pics from inside the 15A Version

That one sounds really good. So with that voltage range it sounds like it could do 10s all the way to 20s. Am I mistaken?

 

[dominik h]

That was the reason I bought it.

I have a 21S bateey in my scooter and sometimes I need also a 72V , a 60V and an 48V charger

I have not tried to charge 10S , but it should charge them.

Only down side is at 10S ypu still have 15A charge current. With 10S you get only 450-600W charging power, with 21S you can get 1050-1300W charging power.