An AGM battery is a lead-acid eletric storage battery that:
  • 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. However, upside-down installation is not recommended.