Product description Specification: Battery Volt:7.4V Battery capacity: 2000mAh 20C Plug Type: T Connector Battery Size: 7cm*3.7cm*1.9cm Weight: 91.5g Function: As a spare battery for a your remote-controlled car and can extend the playing time Note: 1.Please turn off the power switch and unplug the battery connector after use 2.DO NOT Attempt to open ,disassemble the battery pack 3.DO NOT Crush,puncture,short external contacts or dispose of in the fire or water 4.DO NOT Expose to temperature above 60°(140°F) 5.DO NOT Overcharging and over-discharging Package Including: 1 * 2S 7.4V 2000mAh 20C Li-Ion battery 1 * USB Charger Sirecal 2s Li-Ion Battery 7.4V 2000mAh 20C T Plug Connector with USB Battery Charger for RC Car Helicopter MJX F45/T55 Huanqi 848B/827B/823/55/956/957/948 Q.