Instructions
Plug the AC side (that is, the pin-sized nob with a yellow band on it) of the AC adapter into the PSP.
Insert the power cord side of the AC adapter into any electrical outlet. The power light on the PSP (that is, the small light on the bottom-right corner of the system) should begin to glow orange, indicating that the system is charging.
Wait until the power light on the PSP no longer glows orange, then disconnect the AC adapter from the PSP. Charging the PSP with an AC adapter should take a few hours.