AGM Lead Acid Batteries
Absorbed Glass Mat batteries are constructed differently than the traditional flooded battery. Th..
Absorbed Glass Mat batteries are constructed differently than the traditional flooded battery. This write-up covers mainly the AGM's, but also applies to most other brands of deep cycle AGM batteries. In AGM batteries (also called starved electrolyte), there is a thin ultra-fine fiberglass mat sandwiched between the plates that are saturated with battery acid to about 95% of what they can hold. This mat is then packed in between the plates and slightly compressed, then welded/soldered in place. Because the plates and mats are packed fairly tight, they are almost immune to vibration.