Understanding the Difference Between AGM and Conventional Batteries Choosing the right car battery can be confusing, especially when comparing AGM batteries with conventional flooded lead-acid batteries. While both store electrical energy, their construction and performance characteristics differ significantly. Source - https://www.marketresearchfuture.com/reports/agm-batteries-for-car-market-35595 Conventional batteries contain liquid electrolyte that moves freely inside the battery. AGM batteries, however, use fiberglass mats to hold the electrolyte in place. This design helps reduce spillage and improves resistance to vibration.