SKYREAT 4 in 1 Rapid Battery Charger for DJI Phantom 4/4 Pro / 4 Pro+ Battery and Remote Controller Transmitte (Black) Input: 110-240V Output: 17.5V 12A (branch: 17.5V 4A) Charging time: 70-90 min's for each battery; Stable and safe, intelligent temperature control, when tmprerature rise up, fan will speed up automatically.(when controller in charge only, fan will not operate since current is low. If temperature of the battery is too hot after discharge, charging will stop till temperature back to nomal.) 4 in 1 charger: can charge 3 batteries and the controller at one time Special designed for DJI Phantom 4 RC Quadcopter 4 in 1 Rapid Battery Charger for DJI Phantom 4/4 pro/4 pro+