Just to state that I have been able to get my old battery working again by cracking open the battery (carefully) and pressing a reset button on the PCB. The battery had gone into a protective mode and wouldn't charge until this was done.
Just wanted to say hello from Scotland.
Interested to know if there is any experience of rebuilding batteries or retrofitting a new battery and BMS into an existing housing?
I have a Focus Jam2 (2018) with a defective and totally dead battery and from what I can tell it is impossible to...