To all, There seems to be questions from time to time on battery backup supplies so I did some testing. I have an APC 500, which I think I purchased for about $70, for my single Amaya and computer that runs it. I tested with a 4700 stitch design. As soon as the design started I pulled the main plug. Everything ran normal for thirty seconds then the computer auto shut down. The Amaya kept running and finished the design which took five minutes. I finally shut the machine off at the six minute mark. At this time I don't know how much longer the machine would have sewn, but I do know it will sew at least six minutes off my battery. After I recharged the battery I turned on only the computer and pulled the UPS plug. The computer ran for three minutes and fifteen seconds then auto shut down. Moral of the story: the computer requires allot more power than the Amaya. I hope this information is of some use to those with questions. I know it answered some of mine. Frank Force Ten Embroidery AMAYA Tech