AGM Batteries use a glass-mat separator which absorbs 100% of the lead acid electrolyte. Because of the immobilized electrolyte, an AGM battery will not leak or spill and does not require water addition. This battery is used in deep-cycle and specialty applications such as telecommunications, wheelchairs and security alarm systems, as well as in automotive starting applications.

 

These batteries have very good capacity to weight and can release "amps" at a very high rate.