Pick up a car battery tester from Grainger to help quickly and accurately determine how much power your automotive battery has in it. A load tester can determine voltage, and battery fluid testers often can measure both voltage and specific gravity. Also find analog battery testers that can be compatible with smaller 9V, AA, AAA, C, D and 1.5V button type batteries. Rely on Grainger to help ensure you have battery power when you need it. Find precision battery tester options at Grainger.