Battery testers work by applying load and monitoring the voltage and current of the battery. The actual process is quite simple slect your battery Ah capacity and press next button to start the test. battery tester will perform three stage load test and after that it can show result battery is GODD ,WEAK or BAD.

battery test range : automotive battery : 2.5Ah to 180 Ah

inverter /ups battery : 2.5Ah to 240Ah