AGM batteries differ from flooded lead acid batteries in that the electrolyte is held in the glass mats, as opposed to freely flooding the plates. Very thin glass fibers are woven into a mat to increase surface area enough to hold sufficient electrolyte on the cells for their lifetime. The fibers that compose the fine glass mat do not absorb nor are they affected by the acidic electrolyte.
AGM batteries presents better self discharging characteristics than conventional batteries in different range of temperatures. Maintenance free and easy to use, contemporary advanced technology research and development of new high-performance batteries, deep cycle AGM can be widely used.