RV Battery Rapid Hydrometer Tester

<p>Might Max Battery Hydrometers are designed to detect a battery&#39;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&#39;s state of charge.</p><p><strong>Mighty Max Battery Hydrometer</strong></p><p>- Thick wall plastic body resists breakage</p><p>- Direct dial scale features oversize markings</p><p>- Immediately and accurately tests battery life whether the battery is hot or cold</p><p>- Works on all 6-12-24 volt systems</p><p>- Includes a Step-by-step instructions on body</p> <br/>Genuine Mighty Max battery Product