10S4P 36V 12Ah battery pack is a Lithium ion rechargeable battery pack with battery management system intergrated, normal voltage at 36V, rated capacity at 12Ah, with 10-30cm long 22AWG open wires for charge and discharge (it comes with bare leads in default but connector can be customized accordingly). It is mainly used on electric tools, electric toys, electric bikes, electric scooters, electric boats and so on.