ANCEL BA301 battery tester adopts the state-of-the-art conductance testing technology to measure the actual cold cranking amps capability of starting battery, battery health status, and common fault of starting system and charging system quickly and accurately. It works on all automotive 6V & 12V 100-2000 CCA lead-acid batteries of car, motorcycle, light truck, and more, including regular flooded, AGM flat plate, AGM spiral, GEL, and EFB batteries. And it features the "Waveform" menu and a hot-key on the device to monitors real-time voltage. This tool lets you know the battery status in advance and replace with a new battery in time, save a trip, and money to an auto repair shop.