Has anyone had any success reviving dead Soundboks batteries using the original BMS? I just acquired 3 dead batteries and would like to try my luck bringing some of them back to life... I managed to briefly bring one of them back in action by feeding in some 12v on the main leads. The BMS came back online and I managed to reset the battery and charge it for a while. But then it stopped charging, and the BMS stopped responding, and now the battery measures 12,9v... Wonder if it went toast.