USB charger
 

any chance the PSP and 770 share plug sizes?
http://www.overstock.com/sm-sony-psp..._ti-82124.html

Nope, sorry, not compatible. The PSP connector is larger than even the old Nokia one, so it won't work in conjunction with an adaptor. I got one and tried; I will try to solder a new plug on if I can find one.