absorbed glass matt

A new onboard monitoring system keeps passengers updated on power and water levels, and a new electrical system utilizes cutting-edge absorbed glass matt (AGM) batteries that can be charged by the tow vehicle’s 220-amp alternator, ...
http://www.dubaichronicle.com/?p=1434

AGM stands for absorbed glass matt batteries, that is they have electrolyte in them the same as a flooded battery only it is absorbed in the glass matt. The only real difference is that the AGM batteries accept a charge much more easily ...
http://www.exploroz.com/Forum/Topic/57885/AGM_battery_charging_and_PL20_advice.aspx