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 & 4-Pin XLR Output. 
 
Cell Chemistry
The MM-9 utilizes Starved Electrolyte, also known as Gel-Cell or Lead Acid.
Advantages:
Low cost, high per cell voltage, no memory effect and good capacity life.