Optimate Cranking Power & Alternator Tester

The ultimate pocket tester for on-vehicle battery performance & alternator voltage testing with either 12V lead-acid or 12.8V LiFePO4 starter battery – Easy troubleshooting from cranking to charging! For vehicles fitted with 12V AGM, GEL and STD lead-acid or 12.8V LFP / LiFePO4 starter battery. As easy as 1-2-3, connect to battery, check state of charge, start engine tester displays cranking voltage and vehicle charge voltage simultaneously – 15 sec is all you need! Display cranking volts down to 6V and charge voltage range up to 15V – Check weak battery or overcharging! Easy to use! Connect with the included clips to the battery or connect to an installed SAE battery lead.