An AGM battery, or Absorbent Glass Mat battery, is an advanced type of lead- acid battery where the electrolyte (battery acid) is absorbed into a fine fiberglass mat separator placed between the positive and negative plates. This design holds the acid in place, preventing it from freely flowing inside the battery

. Key characteristics of AGM batteries include:

• Maintenance-free and sealed: The absorbed electrolyte eliminates the need to refill water, making AGM batteries sealed and maintenance-free

• Spill-proof and leak-proof: Because the acid is absorbed in the glass mat, AGM batteries are spill-proof and can be mounted in various orientations without risk of leakage

• Valve-regulated lead-acid (VRLA) type: AGM batteries have one-way valves that regulate gas release during charging, recombining gases internally to minimize water loss

• Superior performance: They provide higher power output, faster charging, and better vibration resistance compared to conventional flooded lead-acid batteries

• Durability: AGM batteries are more resistant to shocks and vibrations, making them ideal for vehicles with high electrical demands, such as those with start-stop engines, as well as for military, aircraft, and renewable energy applications

In summary, AGM batteries are a premium, maintenance-free, sealed lead-acid battery type with absorbed electrolyte held in glass mats, offering enhanced safety, power, and durability over traditional flooded batteries