What you need
1 x Sony (original) battery
1 x replacement battery for your PSP
1 x small pin
1 x 512mb memory stick
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Signing UpStep 1: Taking apart sony battery
Be careful not to cut yourself or to dig to hard into the side of battery because there is chips in it and you should not damage them. (not sure what they do, but do not damage them).
next step....





































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so when the battery charger charges the battery, and sees that the battery is at 4.2v, it shuts off
cutting the trace might be a good idea.... but i don't remember if you could, the trace might go under the chip, or something....
if you could cut the trace, you could bridge it back with solder, but you would have to scrape the green 'stuff' epoxy off of the circuit board
Just run Rains MMS maker and it should be easy as pie
my PsP i bricked, and my motherboard is damaged so i will buy a new one ( a new motherboard). i would know if this work on official firmware cause i didn't have a Custom firmware PSP to put the special file on the Memory card.
**note: F*ck DATEL,they sell TOOL BATTERY without the file for the memory card**
Thank to Dark Alex for making nice downgrader...
Thank to AcidMods
Thank to all the PsP communitie
I like to say thanks..