The "paper clip trick" is a makeshift means of resetting the battery on a Sony PSP. Faulty memory modules in some early-model PSP batteries would freeze and refuse to boot or charge, requiring that the battery be shorted out to drain the power and reset the memory to zero. While it's best to pursue a warranty repair or replacement for your console, as a last resort, the trick can bring a defunct battery back to life.
Turn your PSP over so you are looking at the chrome circle with the inset "PSP" logo on the machine's rear face.
Push down on the release button for the battery door, located on the far left side of the console. Lift the battery door up and away from the body of the PSP.
Place your palm over the battery and turn the PSP screen-side up to tip the battery into your hand.
Twist the paper clip into a tight "U" shape and place one end on the battery's "+" terminal and the other on the "-" terminal. Hold it for several seconds.
Replace the battery into the compartment and fit the door back into place to complete resetting the battery's memory. Connect the PSP to a power outlet; if it does not turn on immediately, give the battery six hours to completely recharge.
This hack should only be used as a last resort. Electronics store manager Danny Goulter explains, "The paper clip trick constitutes tampering, which can void your console's warranty. It's always best to go for a replacement, even if it takes a bit longer. But we've had PSP users bring their systems back to life with the trick."