Optimate Crank power & alternator tester

These small and handy testers will help you make a diagnosis of your electrical system in a snap. Comes supplied with battery clips for use on the battery terminals, or use your already existing Optimate quick-connect for easy access. They work with all 12 Volt lead-acid, AGM/Gel and LiFePO4 (LFP) Lithium batteries in motorcycles and cars.