Holy Stone 5-In-1 Drone Battery Charger and 2 Pcs batteries for Syma X5C 5 in 1 X 5 battery CHARGER with 5 converting cables to enable this charger to fit for much kinds of batteries like Syma X5C,X1,Holy Stone F180, WLtoys,Hubsan,UDI 818A, RC Helicopter etc.(BATTERY ONLY FIT FOR X5C&M68) Voltage input: DC 5V; Voltage output: 4.2V; Current output: 350mAh - 410 mAh When the battery is charging, the light on charger lit. When finished, it will off automatically. Over charge protection and Short circuit protection Chargering batteries on the same time to enable your rc helicopter to have enough replaced battery so that to have longer flying time. Please notice that this product can only fit Syma X5C quadcopter, if you buy it for other drone, the size may not fit.