I found out today that if you have done USB charge mod on your PSP, you no longer need to pay a fortune for new PSP chargers. Buy a Motorola Razr charger, and itll charge throuhg the PSP's USB port at the same speed as the AC Plug Charger cos its a 5V charger. Ive tested it on my PSP, and it works.
Now you can charge through USB quickly if you have dual nubs!