I like the LBA10 from Hypeion. It will balance on charge or discharge. On charge you can go up to 10 amps. It will go from 2-6 cell balancing, but only shows which cells are being balanced, not their actual voltage unless you have it connected to a Hyperion charger. I'm not sure what connector it comes with out of the box as I bought mine used, but you can always just solder what ever connector you need.
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