I will play the broken record here. USE A PSP CHARGER FOR YOUR READER, NOT A USB CHARGER!!!!!
Seriously, usb charging on a pc is iffy at best (it sometimes drains the battery!), and usually doesn't work from a wall charger.
The PSP charger (yellow round jack) ALWAYS works. It's faster than usb charging too. You can get PSP chargers (wall outlet or car charger) ANYWHERE. You can even get a PSP power/data cable if you really want to charge from a ccomputer's usb connection. (Use the round yellow PSP plug, NOT the mini-usb plug!)
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