Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40 Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40 Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40 Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40 Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40 Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40 Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40 Balance 40AH 17s RS485 8s BD4A20S4P BMS 40a Active Lifepo4 Li-Ion 72V 24s 0.4a BD4A17S4P JK Smart AH 20s BD4A24S4P Jikong 13s 40