This state-of-the-art lead-acid battery is the valve-regulated type(often called sealed or maintenance-free), which fixes the acidelectrolyte in a gel or in an absorptive fiberglass mat. Theadvantage of this design is that the battery needs no wateradditions, can be operated in any position, and can be used inclose proximity to people and sensitive e This batteryoffers heavy duty sealed no-leak design with no-corrosionterminals, higher cranking amps, lower self-discharge and greatervibration resistance.