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A fully charged battery will measure at 1.265 specific gravity. A
discharged battery will measure at 1.120 specific gravity or 11.7
volts DC. A hydrometer is required to measure “specific gravity.”
Most batteries with deep cycle rating require water to be added
as needed. This depends on the amount of draw time that your
converter is in operation.
Use distilled water if at all possible as it is nearly mineral free.
Not keeping batteries charged will result in shorter life expectancy.
Should distilled water not be available, well water is better than
no water at all.
Be sure to keep ALL terminals clean at all times to ensure
good contact. . .
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