Have a GBA Pokemon game that won't save or any other games that just won't work. Well my friend made a video tutorial on how to fix the problem for me. Im going to share it with you.
Requirements - Tri-wing Screwdriver to open the cartridge - new CR2016 battery to put in - Knife or some kind of flat-head to help remove the old battery - Abrasives (optional) - Tape (optional)