PSP 300x Power Jack Replacement - iFixit Repair Guide
PSP 300x Teardown - iFixit
PSP 1000 Teardown - iFixit
PSP 2000 Analog Stick, D-pad and Action Keys Replacement - iFixit Repair Guide
Original battery died sometime last year, been putting off getting a replacement ever since. Happy to report a solid 7-10h from the ifixit brand. I forgot how nice being actually cordless is! :
iFixit Tears Down PlayStation Vita, Finds No PSP Inside