AGM (absorbed glass mat) batteries contain a glass mat separator that absorbs the electrolyte solution between the battery plates. The material’s design enables the fiberglass to be saturated with electrolyte – and to store the electrolyte in a “dry” or suspended state rather than in free liquid form.Absorbed Glass Mat (AGM) batteries have a glass mat between the plates. They have all of the advantages of the “Maintenance Free” batteries plus:Much safer then wet batteries (due to hydrogen gas recombination during charging)Do not require waterLower self-discharge rateIn the perfect conditions AGM batteries can offer longer service lifeBetter vibration resistance & enduranceCan be used in saltwater applicationsSpill proof and offers flexibility in mounting directions (follow manufacturersguide lines)Can be used inside a semi-enclosed area, like the passenger compartment or trunkNo sulfation from electrolyte stratification or water loss