Hi
I had the same problem with my beloved Nokia N900 charging usb port. Not sure what to do, changed a new battery & now I can only barely charge this device through my laptop usb port only. I thought about chage the usb loosen part, in fact I love this phone and is been more than 3 years for me, I don't want to gigve it up until TMOBILE have the new Nokia lumia900 available for upgrade. What to do? Guess my best option is to replace the usb charging port through a local mechanic for $30 bucks...wish me luck