... ion battery, NI-MH battery, Ni Cd battery, power, adapter, power bank. 2. charging and discharging functons About RFNT4 ... changeable batteries , like electric tools batteries, laptop batteries, mobile power bank batteries, DV batteries ,Camera batteries ,AAA batteries , ... going to normal charging status, when the battery establishes communication with the tester.Pre-chargeBattery goes into pre-charge ...