Optimate test – cranking & alternator, TS-121, 12V tester for battery state of charge, cranking performance and vehicle charging system

Optimate test – cranking & alternator, TS-121, 12V tester for battery state of charge, cranking performance and vehicle charging systemThe 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.; Verifies charging voltage when engine is running.