Becuz i have an otterbox case that i love on my N900 the Mugen is out of the question cuz of the size.

And New trent battery packs looks as big as the n900 but man 11000 mAh would be awesome to have but the battery pack looks as big as the n900 if not bigger, good to have anyways for home use or long trips.

I have 3 extra batteries & 4 universal battery chargers from digitial power pro and it takes me 3+ to 4 hours to charge all batteries at the same time.

I only carry one extra battery when i go anywhere just in case.