Thanks!!!

These are all very good feedback. The alternative charger I have is actually an original Motorola bluetooth headset charger. I don't have any other devices with micro USB except this (and the N900) and was wondering if I could keep 1 charger in the office and use the N900 charger at home to avoid travelling with it so often.

I'll give it a try (knowing that theoretically, it won't fry my N900 and/or battery) and let you guys know the result. Thanks again.