all right! thanks for the replies. i have been using a 1300mah variable power adapter, set on 4.5v, with a switch mounted on the casing. it works great, but kinda bulky. i was hoping the usb's are working out good, so i could get an ac adapter for work, a dc cig lighter adapter for the truck, and plug into the puter at home. everything sounds pretty positive, so i'll order one. again, thanks everyone.