i have 2 Batteries for my PSP 2000, i only recently learned that the problem with the first battery may have actually been the PSP not charging up via the power cable
when i was fiddling with batteries between my 2 PSPs i found that if i switch the batteries quickly the PSP would not fully rest (By asking me to re-input the current time/date)
so i am wondering, if i was in the middle of a game and notice the battery is low, i put the PSP on standby and take the battery out, how long do i have to replace the battery before the PSP looses it's state and resets (thus quitting out of my game)
Best Answer
From my personal experience: swapping the batteries probably won't work, except you are extremely fast.
The PSP's date is kept because of an internal battery (pretty much like in every PC - BIOS battery). It takes some time till this one is fully depleted.
So: Once the power supply is cut (battery), the PSP does not hold enough charge, to keep the game running, even on standby.
What you could do - if you notice low battery, plug in the power supply and then swap the battery. Now, I don't know if the PSP can run with power supply only, so try it first.