HOBBYSUNRISC 4 in 1 Multi Intelligent Parallel Phantom 4 / 4 Pro / 4 Pro+ Battery Charger And Transmitter Charger For DJI Phantom 4 DJI Phantom 4 4 in 1 charger 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 temperature 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 normal.)