My red and yellow carts still have original batteries too, and the saved games still work perfectly (as of two years ago when I last checked). The only thing I

My red and yellow carts still have original batteries too, and the saved games still work perfectly (as of two years ago when I last checked). The only thing I might say "oh well" about losing is the official Mew I got from some Pokemon event at a mall, but I don't even have the certificate that it came with so it doesn't really matter.