My idea is based on the simple electronic heating pad I frequently use at night for relief of the arthritis pain I experience often in my left arm. How often I have wished that... 1.) The ends were sewn together to form a sleeve that my arm would fit into comfortabley and... 2.) the pad was powered either by batteries (maybe convential aaa battieries or such... MAYBE watch style batteries since those last forever and/or was powered by a "recharge it during the day use it at night"...