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by on November 23, 2022
A true maintenance-free battery does not exist. Even with sealed batteries that do not require water, the terminals should be checked periodically and cleaned, and tightened if necessary. For open cells, the main maintenance requirement is the regular addition of distilled or demineralized water. All battery periodic maintenance procedures should attempt to identify faulty cells or blocks. This can be done with specific gravity measurements (not possible with sealed batteries), voltage checks...
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