WLtoys Upgraded 3.7V 200mah Li-po Battery for WLtoys V911 V911-1 V911-2 Helicopter Li-po battery Capacity: 200mAh. Voltage: 3.7V Dimension: approx.5.2x1.1x0.3cm/2.0x0.4x0.1". Weight: approx. 9g Package includes 1Pc of battery Suitable for WLtoys remote control helicopter V911, V911-1, V911-2