I have 2 bleep bloop USB carts that are the red ones back from like the first batch. They worked great until recently. My songs would disappear off one of them if I left it alone for a few hours. I assumed the battery died so I replaced it and replaced the other carts battery as well. But the cart still dumps my files. I thought maybe it's because I leave it in a MGB with an electroluminescent panel installed so I started taking the cart out when not in use (and added a fresh battery) but it still did it.
Any ideas what's going on? Can the carts finally crap out or should I source batteries from somewhere other than Batteries+?