ANCEL BST500 battery tester is designed with convenience and broad functionality in mind. In addition to the printer function, it features a wide capability for the purpose of battery diagnosis and maintenance. It works on 12V and 24V battery systems, includes the actual Cold Cranking Amps test, the health status test, and the diagnosis of both starting and charging systems for common faults. It also has an integrated printer capable of printing out test results for improved service. This tool lets you know the condition of battery system in advance, save a trip and money to an auto repair shop.