Gel battery is a type of lead-acid battery with a sulfuric acid gelled electrolyte.
Sulfuric acid is mixed with a silica forms in a mass consistence of gel.
The gel batteries used grids made of lead alloys without antimony.
Each gel-cell battery has a one-way self-sealing valve which opens in case of increased pressure inside the battery and release gases outside protecting the housing from bursting.
Gel batteries uses a recombination process which eliminates the need for adding water.

The PowerSafe® OPzV range of valve regulated lead-acid batteries uses a proven combination of gel and tubular technologies to offer a very high level of reliability. These single cells benefit from an optimised plate design that gives capacities in excess of the DIN standard values. ...
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