Built-In Hydrometer

The sealed battery has a built-in, temperature-compensated hydrometer in top of battery. This hydrometer is to be used with following diagnostic procedure

1. When observing hydrometer, make sure that battery has a clean top.
2. Under normal operation, two indications can be observed:
   • GREEN DOT VISIBLE - Any green appearance is interpreted as a "green dot," meaning battery is ready for testing.
   • DARK GREEN DOT IS NOT VISIBLE - If there is a cranking complaint, battery should be tested. The charging and electrical systems should also be checked at this time
3. Occasionally, a third condition may appear:
   • CLEAR OR BRIGHT YELLOW - This means fluid level is below bottom of hydrometer. This may have been caused by excessive or prolonged charging, a broken case, excessive tipping, or normal battery wear. Finding a battery in this condition may indicate high charging by a faulty charging system. Therefore, charging and electrical systems may need to be checked if a cranking complaint exists. If cranking complaint is caused by battery, replace battery.