WLtoys Upgraded Li-po Battery Charger with USB Cable and 5Pcs Li-po Battery Kit for WLtoys V911 V911-1 V911-2 Helicopter Li-po battery charger Charging for 2 batteries at a time With USB cable for convenient charging Dimension: approx.4.0x3.5x1.0cm/1.6x1.4x0.4" Suitable for WLtoys remote control helicopter V911, V911-1, V911-2