Rechargeable Lithium Battery 6.4V 750mAh 

Compatible with WLtoys A959-A, A979-A, TR3100, TR3102 and TR3104.

Specifications:
Item type: Li-ion battery
Battery capacity: 750mAh
Voltage: 6.4V
Plug: JST plug
Battery dimension: 55 * 33 * 17mm
Battery weight: About 49.5g
Suit for: WLtoys A959-A, A979-A, etc.

Caution for the battery:
Don't over-charge, or over-discharge batteries.
Don't put it beside the high temperature condition.
Don't throw it into fire.
Don't throw it into water.