Amazingbuy - 4 In 1 Battery Charger for Hubsan X4 H107 H107L H107C H107D, Syma X5 X5C X5C-1 4 In 1 Battery Charger For Hubsan X4 WLtoys UDI JXD Syma JJRC RC Quadcopter 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. Total Configures:1 charger, 1 USB cable