The MM-9 is a 9amp  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 a 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.