Downgrade Psp How To Downgrade Psp Without Pandora Battery?

How to downgrade psp without pandora battery? - downgrade psp

He had recently watching videos on YouTube, like my PSP downgrade.
Everything has a failure, because the features have been damaged http://dl.qj.net
I wonder why it used to work and it shows as corrupted data.
My PSP is version 5.50.
Can someone tell me how to downgrade and all that without having to buy a Pandora battery?
THX to please all possible means.