The root is “not inside any folder” and copy the ISO files you download inside of that folder.Never put ISO files inside the PSP\GAME folder they will show as corrupted data.
If it has been sitting on a shelf in the store for a year, it won't last very long.
Manufacturing dates are important." I have found the above statement to be true from my own experiences. Oh, and I thought I was saving the battery for later. It's the same regardless of method I use to flash the BIOS.
Input your desired settings again and enjoy 5.00 M33 on your PSP.
I have never charged the battery since I never needed it and that way it will be unused when I one day sell the laptop. Im not sure why you think the battery wont degrade when not used. And the fact that it has never been charged isnt going to help things. They only last two to three years, even if they are sitting on a shelf unused.
Go to Settings System Information and see what: Congratz!