How do I fix my PSP fat's battery?

whenever i turn it on while its not charging it offs even if i charged it for hours. the orange light appears when i charge it and it ons if it is still plugged in the charger. so in other words PSP PLUGGED IN THE CHARGER- TURNS ON, WORKS PSP NOT PLUGGED...

ok my psp stoped working it was a 3.71 m33-2 version now when i turn it on the black screen dosent turn on and the gteen light goes on for like about thirty seconds then turns off so is there any i can fix it without using a pandoras battery.... also...

so yeah. my psp is dead. and i don't know how to fix it.

it feel out of my hands and im wondering what has happened and how i fix it?

I try to plug in and recharge my PSP battery for a minute. After recharge (green LED light),I put my battery to my PSP system,I turn it on and it says,it not fully charge yet.I try to put my battery back in the charger base for a minute (red LED light...

Ok, I have a psp 3000 and my friend has a psp 1000 and I wanted to update his psp, but his psp said battery to low to update, so I put mine in and put mine in his for the moment, when his psp was done updating, I took back my battery put it in and it...

So, my friend's PSP doesn't work quite right (and for the record, it's a white PSP 2000). The main problem is that it normally won't turn on unless the AC adapter is plugged in, and when it does turn on (under AC power), it only stays on for like 5 minutes...

question 1: ok here is the thing. i have a psp running on firmware 5.00m33-6. can anyone tell me how to downgrade my psp to firmware 1.50 without a pandora battery? i also have a psp running on firmware 5.00m33-4 and i want to downgrade it to 1.50 too...

I have 2 psp's. One is version 1.5 one is 2.0. The 1.5 has stopped working before and would not work until I charged with the charger that came with it as I was only using the 2.0. I though that was weird. Now I can not get the 1.5 to turn on. I tried...