... 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 ... to normal charging status, when the battery establishes communication with the tester.Pre-chargeBattery goes into pre- ...