| Absorbent glass mat battery |
| Maintenance-free battery with a contained electrolyte and no colour indicator |
| Lead-acid battery where the electrolyte is contained within a microscopic glass mat (AGM). The battery is sealed and fitted with valves. |
| AGM is the abbreviation for absorbent glass mat. |
| Due to containment of the electrolyte, this type of battery cannot have a colour indicator. Absorbent glass mat batteries are identified by the abbreviation AGM on the battery. |
Note | Always replace an absorbent glass mat battery with another absorbent glass mat battery. |
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