I have the impression there are AGMs, & then there are AGMs... If you have an Optima battery you probably know it. They are *quite* expensive - As in double what the PowerSonic batteries in my scooter cost - Which I'n not unhappy with. This engineer is a big fan of Optima AGMs... http://www.wheelchairdriver.com/powerchair-batteries.htm Jack -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist