Like many others my v1 died. A lot of the symptoms pointed to the battery pack. I found a v2 battery pack on eBay for a good price, that I intended to mesh with v1. Long story short, they use different can bus to communicate, so you can’t splice them in. What I ended up doing was taking the A123 from the v2 box and placed them in the v1. This worked quite well until the board died again. I would like to know which a123 are still usable, and a charger that would allow me to individually charge/balance them back to spec.
Additionally would the bms be at fault for the 2nd failure? The a123 in the 2 packs are slightly different, but seem to share similar specs. Is there a way to test the bms works as expected?