I found this weatherproof USB power outlet from Burns Moto in Redwood City, CA, ($24.00). Now I can keep my phone and bluetooth headset charged while on the road. An added bonus was ordering the part during the Superbowl blackout and having it hand delivered to my mailbox the next day. I'm only a couple of miles from RWC but great customer service nonetheless.

http://burnsmoto.com/usb-power-socket-weatherproof.php

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