So yesterday I opened my psp after leaving it for a couple of months and It randomly shutdown after few minutes of playing while its battery is full . Normally I would just classify that as a dead battery but since i also just changed faceplate before playing and did some few mistakes while doing so I am afraid that i messed something inside my psp & I wont be able to get a new battery before tomorrow so I need some to assure me that this is only the battery to sleep well tonight. So here is the symptoms: 1.The psp works well when the battery is removed and it is plugged to the charger. 2.When I insert the battery it show as fully charged but after a minute or two it lower to about 20% then shutdown but after leaving my psp untouched for a minute It works again and show that it is fully charged and do the same all over again. 3.When it is plugged to the charger and the battery is inserted it also randomly shut down. So that is basically what is happening. Is that the battery or should i open my psp and check for something broken?