Problem with my Battery

I have a problem w/ my PSP battery. When I turn it on it goes straight to a menu (press x for M33, o for 3.80). But when I put in my brothers PSP battery, it works fine. Does anyone knows how to fix/program the battery?

You need to de-pandora your battery.

How do you de-pandora the battery? Is there any tutorial for it?

-Well, first put your magic memory stick in your psp.
-Take the Pandora battery OUT.
-Start your PSP with the Charger, then put the battery in after you start it up (so that it doesnt bring up the CFW install Screen).
-Then use the Program on the memory stick that turned your battery into a Pandora battery, to turn it back to normal.

Which program? The one that says Pandora Battery Creator?

Ya, i think thats the one. And when you start it, there should be an option that returns the battery to normal.