[rprockey]

Check if Sprint Navigation, or anything else that uses multiple radios, is running. USB charging does not deliver as much power as other sources and if your 800 is doing work that requires lots of power, the draw could out pace the supply.

Traveling cross country with my 800w for GPS, I learned that USB charging doesn't keep up with the drain of Sprint Navigation as my 800 slowly died. I was using one of those car aux to usb adaptors. I had to make a pit stop to Best Buy and bought the Motorola micro usb car charger. With the propper charger, I could run Sprint Navigation all day long.

Hope that helps.
Rockey