Step 3: On your PSP, switch to the Game option, press X or O (depending on which is the "Enter" key of your PSP). Go to "installer" and press X or O to run it.

In a few seconds, a file named "msipl.bin" will be created on the root directory of your PSP memory disc. And now, you should take out your memory disc and then put it back in, which seems to be useless but is a very necessary step.

Step 4: Connect to your PSP back to your computer. Then enter DOS system as mentioned in Step 1. Use the below commands one by one to run the mspformat file: Input "H:", and press the "Enter" Key on your keyboard. Input "cd pandora" and press the "Enter" Key on your keyboard. Input "cd minst" and press the "Enter" Key on your keyboard. Then input "msinst.exe K K:msipl.bin " and press the "Enter" Key on your keyboard. (Here K is the name of the disc that your PSP is recognized on your computer.) When you see a popped up message asking if you are sure, click "Yes".

Step 5: Go back to your PSP, switch to the Game option, press X or O (depending on which is the "Enter" key of your PSP). Go to "battery" and press X or O to run it, press X or O to OK every popped up message to finish running the battery application.

Now, your pandora’s battery has been created!

III. Use the created pandora’s battery to downgrade your PSP

After you turn your batter to a PSP downgrade battery (pandora’s battery), you can use it to downgrade your PSP by following the instructions below:

Take out your PSP Memory Stick and battery, then put back in your PSP Memory Stick first, and put your battery back in. Turn your PSP power on, when you see three options; select the Downgrade option, your PSP will be downgraded in a very short time and it will be automatically shut down afterwards. Turn your PSP on again, and you will see a blue screen. But no worries, you can just press the O key, and your PSP system is already version 1.5! Note: The above process will turn your PSP battery to a pandora’s battery that can be used for PSP downgrade. But the pandora’s battery cannot be used to play PSP games, videos or music. And the process is not reversible. You will need to get an additional PSP battery for regular uses. However, you can use your pandora’s battery to downgrade any PSP to version 1.5 or even repair you PSP.

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