... li-ion battery, NI-MH battery, Ni Cd battery, power, adapter, power bank. 2. charging and discharging functons About RFNT4 Universal ... -MH battery, Ni Cd battery, power, adapter2. Supply for charging, discharging, battery testing, power/adapter testing, internal resistance testing, and ... goes into fast charge status when voltage of battery over setting pre-charge voltage. Fast charge time relates to ...