it is hard to remove the charger and i have charged lots of time now and the usb port is still in place. mine's production week is week 50. i just tried to plug in and out with my n97 charger it seems much easier to remove. is it possible becase the chargers which are distributed with n900 have stronger hook chip(possible defects)? btw my n97 charger has black fasten strip on the wire anmy n900 has white. just for safe i will use my n97 charger from now on