Heltecb 6s 7s 10s 24v 36V balance 18650 bms 30a 60a 21700 battery protection board forE-bike E-scooter

Heltecb 6s 7s 10s 24v 36V balance 18650 bms 30a 60a 21700 battery protection board forE-bike E-scooter

AliExpress