The Altex Preferred MFG 3-in-1 6V/12V/24V Digital Battery Analyzer Tester is capable of testing all 6V, 12V, and 24V batteries, including regular flooded, AGM flat plate, AGM spiral, and gel batteries, making it compatible with a variety of vehicles such as cars, SUVs, pickups, boats, and motorcycles. It provides an overall analysis of the battery's health, displaying data on voltage, internal resistance, cold cranking amp and AH capacity, battery health, and charge status. With reverse connection protection, the tester ensures that battery damage will not occur even if the positive and negative terminals are connected inversely. The device is fast and accurate in determining battery health, and can test batteries both in-vehicle and out-of-vehicle, including dead batteries. Its compact size and large LCD display make it easy to use and carry on outings or business trips.