Like all VRLA batteries, Gel batteries come in a standard ABS battery casing and have positive and negative plates with a separator holding the electrolyte between the plates. True to its name “Valve Regulated”, the battery has valves in the headspace which allow gas to escape should the internal pressure get higher than designed for.

The internal construction of Gel batteries has the electrolyte immobilised in a special Thixotropic Gel held in the separator. The separator is a micro-porous polyethylene material and shaped like the inside of corrugated cardboard which supports the Gel between the plates.

It is the combination of the Gel and the separator, which allows the user to obtain the substantial benefits of Gel battery technology in a cyclic application.