What is an AGM battery?

An AGM battery is a lead-acid electric storage battery that:

    * Is sealed using special pressure valves and should never be opened.
    * Typically uses Calcium/Calcium metal alloys.
    * With proper maintenance, is completely maintenance-free.
    * Has its entire 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 any cycling applications).
    * Is non-spillable, and therefore can be operated in virtually any position. However, upside-down installation is not recommended.