Mighty Max HYDRO-A Battery Hydrometer Acid Tester and Electrolyte Density Checker

Battery Overview

This Mighty Max Battery hydrometer gives you a quick, accurate read on your battery's state of charge by sampling electrolyte from each cell. The floating indicator responds to electrolyte density so you know exactly how much life is left, whether the battery is hot or cold.

Built with a thick-wall plastic body that resists breakage, it features an oversized direct-dial scale and works on all 6, 12, and 24-volt systems. Step-by-step instructions are printed right on the body, making it a handy tool for cars, trucks, boats, RVs, motorcycles, golf carts, mobility scooters, and more.