... 4S Li-ion/LiFePO4 battery 3: Professional technical support; 4: Car starting battery BMS Advantage:15 years experience staff15 years experience ... ,ETL,CE,RoHS• Our main battery include: LiFePO4 battery,Power tools battery,E-bike battery,E-Scooter battery,E-Moto battory ... ,Electric Car battery ,UPS battery,Golf cart battery,E-wheelchair battery,PDA ...