- is sealed using special pressure valves and should never be opened.
- is completely maintenance-free.*
- has all of its electrolyte absorbed in separators consisting of a sponge-like mass of matted glass fibers.
- uses a recombination reaction to prevent the escape of hydrogen and oxygen gases normally lost in a flooded
- lead-acid battery (particularly in deep cycle applications).
- is non-spillable, and therefore, can be operated in virtually any position.