The rechargeable batts on my cd walkman have died after a good few years of regular use. They are the type you leave in and plug a charger directly into the Walkman. Do I have to get special sony ones or can I chuck any rechargeable AA batteries in there with the same effect? While I'm here...another battery question. I've got a jessops recharger and bettery set, when you plug it in the LEDs light up to show its charging and go out after a few hours which I'd always assumed was when they were done but I read the instructions and it said "the LEDs will go out after 10 hours" or whatever....with no mention that the charging would stop at that point. So does that mean I need to unplug them after the charging time is up or will the charging have stopped when the lights go out? Cheers! Tom