Dumb Newbie needs help with Unhacking

Hello...
Um...
I need help Unhacking a PSP lite
Its system Software is 5.00 M33-6
I cant get a pandora Battery...
soo...
any ideas?

...what firmware do you want to goto?
if you just dont want CFW just update to 5.50 official

Could U B More specific.Your Question is 2 vague.