Subscribe to a magazine

Rapid Test Battery Tester

Back to article View Gallery
2 of 5
The mixture on wet cell batteries with removable caps can be checked using a hydrometer to check the specific gravity of the solution. The electrolyte solution of sulfuric acid (~1/3) and distilled water (~2/3) has an ideal mix ratio. As this ratio changes, the charge capacity and condition of the battery will start to degrade. Maintenance-free batteries are built with beefier internal components to reduce water loss and plate degradation over time.