The one that I have does 2A and balances using a super cap, not resistors, never heats up. Functions off pack power, external power not needed. Another nice feature that’s not apparent till you use it, it measures the balance wire/connector resistance and compensates.
Ive removed all the BMS from my packs, since usually it was a bms that killed a p group. I’m happy with checking balance monthly. Made harnesses for varying S counts for easy plugnplay.
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