Lithium Electric Bike Battery 48V 15Ah with Charger, PCB and BMS, 30A Model: KY-4815A Approvals: RoHS, UN38.3, FCC, ... . Cells: A grade cells to make sure batteries in high and full capacity2.Protection: Dual IC chips, that can anti-short ... -over charger, anti-over current, anti-overload3.Compose Type : Injection Technology to make battery more stable4.Certifications : CE,UL,FCC, RoHS ...