- Tue May 21, 2019 6:42 am
Have the similar problem, my BMS dead.
(got few times error21, and didnt power up at all later, baterry had no blue blink, cells cherged, no power output, no 3.3V supply for BMS processor ic. Didnt find out why, made external 3.3vcc for it, powered up, got blue blink and 40v power out. - but it does not communicate with scooter controller - permanent error21, beeps, runs on limited speed only, Segway app does not see battery info too).
Seems it finally p*ised me off
On shared other battery, scooter runs well.
QUESTION: Where i can buy BMS, or used battery , does anybody has replaced bms?
Searching for Ninebot BMS (or cheap battery).