Operation CHARM: Car repair manuals for everyone.

AGM Battery






AGM Battery

The following batteries are maintenance-free. Do not remove any of the labels on the battery and do not add distilled water. Only perform a visual inspection.

Maintenance-free battery with fixed electrolyte (AGM battery).

Lead-acid battery, where the electrolyte is fixed in an absorbent glass mat (AGM). The Battery is closed and equipped with breather valves.

AGM is the English abbreviation for Absorbent Glass Mat.

These batteries cannot have a visual indicator due to the fixed electrolyte. AGM is on the battery to identify it.

When replacing an AGM battery, another AGM battery must be installed.