Same. Mine had expanded so much it almost popped the battery panel off. Thankfully replacements are quite cheap! I went through and replaced old ones on my PSPs

Same. Mine had expanded so much it almost popped the battery panel off. Thankfully replacements are quite cheap! I went through and replaced old ones on my PSPs, DSs, etc and now keep em all charged (with a mess of cables) to hopefully keep em semi healthy and not cause a bonfire in my closet.