The MM-9 is a 9 amp small and lightweight high performance Starved Electrolyte (Lead Acid) battery. The MM-9 is memory free and when properly maintained will offer a consistent run time over the life of the battery. A convenient shoulder strap is standard in addition to a sewn-in belt loop. Includes ATMPRU auto charger. The MM-9 utilizes Starved Electrolyte, also known as Gel-Cell or Lead Acid.