I have the same setup as terrencegf (except I have a kensington travel adapter that includes a usb out - to charge the batteries in the tekkeon MP1550).
The MP1550 includes all tips that are needed to charge the n8x0. Pop in some batteries (I too use eneloops) and charge away.
4 eneloops gives about 1 full charge + "change" to the N800.