So I backed up my Pokemon saves a few months ago before their batteries died and they finally bit the dust. My Gold's clock had been running slow so I knew its time was coming. Anyways, I'm having some trouble trying to solder new button cell batteries into Gold and Red. They were obviously machine welded originally but I don't have a spot welder or anything and the shiny surface does not want to have solder stick to it, and even lightly sanding it didn't help that much. Any suggestions besides using electrical tape to hold it in? Sidenote, the internal battery in my Red is nearly as old as I am. Just a few months younger (October '96.) That's an impressive lifespan.