Input Power:DC 5.0V 2.1A0.5A CC Current 500±50m A1.0A CC Current 1000±80m ACut-off Voltage4.20±0.05VOperation Temperature0-40℃Ni-MH batteries charging parameter:Input PowerDC 5.0V 2.1A 0.5A Pulse Charging Current 500±50 mA 1.0A Pulse Charging Current1000±80 mACut-off Voltage 1.45±0.1VOperation Temperature 0-40℃