Cant remember it's exact name right now, but I mean that adapter from the old Nokia chargers to the mini-usb plug used by the N900.

Anyway, for those who use it, have you noticed that after a while the adapter gets pretty hot and start making weird noises? I actually woke up once and had to plug it out since I couldn't sleep with it plugged in. I'm using the charger supplied with my Nokia E71(its a really small charger, and I think its boosted since the E71 charges extremely quick).