Battery Guides

VRLA stands for Valve-Regulated Lead-Acid. These sealed lead-acid batteries are designed so you do not need to add water in normal use. A safety valve releases gas only if internal pressure rises too high. Why VRLA batteries are common VRLA batteries show up in UPS systems, telecom DC plants, alarm panels, and many standby power setups because they are relatively compact, sealed, and easier to install than flooded wet cells. AGM vs Gel Two common VRLA constructions are AGM (A