Professional Battery Hydrometer Rapid Detection Universal Electro-Hydraulic Density Meter For Car Battery Tester

A hydrometer is an instrument that measures the specific gravity (relative density) of liquids the ratio of the density of the liquid to the density of water ( Comes with a protector case )

• Checks The Batteries For Bad Cells And Specific Gravity.
• By checking each cell specific gravity you can able to find Good, Weak and Bad cells and condition of the battery.