Typle: li ion battery pack Voltage:7.4V/14.8V Capacity:4000mAh With PCB Carried standard:GB/T 18287-2000 Typle: li ion battery pack rechargeable battery pack lithium battery packVoltage:7.4V/14.8V Capacity:4000mAhUsed for electricvacuumcleanerWith PCB and poly switch for full protection.Built-in IC chip will prevent batterypack from over charge and over discharge and prolong battery life Lig ...