I'll tell ya what I did. I went to game stop and bought their psp car charger for 10 bucks. It terminates with a usb port, so anything with a usb-type cable will plug in and charge. It charges the Mogul in a little over an hour, so it's output is close to the ac wall charger. I also charge my zune, my wife's zen, the sons' psp and daughters' DS with it. I highly recommend it.
Coodaddy