pandora's battery puts your PSP into "service mode"
a magic memory stick is a memory stick with files that can be read by said service mode
these 2 things together can do 2 wonderful things
1. they can downgrade your PSP from any official firmware to 1.50 or w/e firmware happens to be magically put on the magic memory stick
and
2. they can UNBRICK your PSP if you happen to brick it
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