The CanDo Diagnostics Batt R/T is a four-in-one tool for testing 12V and 24V batteries, testing vehicle electrical systems (alternator/starter/ground), performing new battery replacement relearns and reading and clearing OBDII emission related trouble codes. This tool is designed to perform battery testing on and off the vehicle and test all vehicle electrical systems. For battery relearns, the tool covers Porsche, BMW, MINI, VW, Volvo, AUDI, Jaguar, Land Rover, Ford, Toyota, Lexus and Mazda. Updates are free.