The Hexfly HX-403 charger is an easy to use multifunctional charger with built in LiPo balancing for 2S - 4S LiPo or LiFe batteries. You can charge two 2S batteries at the same time or one 3S or 4S batteries. With built in power supply, the HX-403 is an all in one package at a price that is hard to beat.Specifications: Input Voltage - AC 100~240V / DC 10~18VCurrent Rate Range - 0~3.0ASupport for Charging - 2s*2/3s/4s (cells)Support JST-HX 2.5 ConnectorSpecifications: Input Voltage - AC 100~240V / DC 10~18VCurrent Rate Range - 0~3.0ASupport for Charging - 2s*2/3s/4s (cells)Support JST-HX 2.5 ConnectorFeatures:Detect current rate and capacity of individual cellIdentify the Cell Count AutomaticallyAuto Charger and Auto Cut-Off for SafetyTeperature Protection Fuction. Adjust Charge Power Automatically when Overheat