Might Max Battery Hydrometers are designed to detect a battery's state of charge by sampling the electrolyte from each cell. The hydrometer contains a floating indicator that represents the density of the electrolyte - the more dense the electrolyte the higher the battery's state of charge. Mighty Max Battery Hydrometer - Thick wall plastic body resists breakage - Direct dial scale features oversize markings - Immediately and accurately tests battery life whether the battery is hot or cold - Works on all 6-12-24 volt systems - Includes a Step-by-step instructions on body

Might Max Battery Hydrometers are designed to detect a battery's state of charge by sampling the electrolyte from each cell. The hydrometer contains a floating indicator that represents the density of the electrolyte - the more dense the electrolyte the higher the battery's state of charge. Mighty Max Battery Hydrometer <p