EVPEAK CQ2 50Wx4 6A 4 Port RC Drone Battery Balance Charger Discharger charge 4 batteries at the same time; AC/DC input, with the power switch ,more safety; Adjustable cutoff voltage; Pulse charging method can effectively control the NiMH/NiCd battery heat, strengthen the activity of the battery, charge more, extend the service life Aluminum case + fan, high efficiency cooling;5 groups of NiMH/NiCd cell cycle, the cycle time can be adjusted Over current protection, over voltage protection, temperature protection, reverse protection, short circuit protection;Using synchronous rectification algorithm, charging efficiency is higher Discharge mode: CC/CV optional;Pre charge function;Temperature control fan;Firmware upgrade cia USB kit;Biuld-in 500W SMPS