Rechargeable Lithium Battery 6.4V 750mAh Compatible with WLtoys A959-A, A979-A, etc. 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.