If you own a PSP, you might want to uh, make sure your battery isn't expanding – Destructoid
Kastar PSP110 PSP-110H Li-ion Battery and AC Wall Charger Replacement for Sony Video Game PSP Playstation PSP-110, PSP Fat, PSP-1010, PSP-1000, PSP-1000G1, PSP-1000G1W, PSP-1000K, PSP-1000KCW - Walmart.com