AGM-Gel batteries combine the advantage of AGM technology and polymer gel technology. The separator material of AGM-gel battery is an AGM (Absorbent Glass Mat). A gelling agent is added to the electrolyte to reduce movement inside the battery case. Many gel batteries also use one way valves in place of open vents, this helps the normal internal gasses to recombine back into water in the battery, reducing gassing. With the polymer gel technology, AGM-gel battery can provide more capacity at lower temperatures and reduce water-loss at high temperatures; AGM-Gel also have a good large current performance for AGM technology.