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Using Electrolyte Specific Gravity Method:

Remove the battery filler caps and check the water level.
- If necessary, add water to the appropriate level.
Measure the electrolyte specific gravity using a hydrometer.
- If it is less than the specification, recharge the battery. (See BATTERY RECHARGING ).
Battery electrolyte specific gravity [20 °C {68 °F}]

1.22-1.29