Also Absorbed Glass Mat, a type of Sealed lead-acid (SLA) battery. AGM batteries are functionally similar to ordinary flooded (free-flowing electrolyte) lead-acid batteries, except that the electrolyte has been immobilized in fiberglass mats, which are positioned in-between the cell plates. Since the electrolyte is totally absorbed in the fiberglass mats, there is no free-flowing acid to leak or spill; this makes AGM batteries suitable for use in any installation angle. AGM batteries are available in many shapes and sizes, and are commonly seen as "Sealed Lead Acid", "Non-spillable Lead Acid" or Orbital-type automotive batteries. AGM batteries are very common and are used in backup lighting, older camcorder batteries, UPS systems, portable jumpstart devices, etc.