New battery replaced. Maintained. Tested and working on a Super Famicom. Disinfected with anhydrous ethanol. Please assess the condition of the cartridge based on the images. Only purchase if you are satisfied. The cartridge contacts have been polished and cleaned with anhydrous ethanol and polishing compound to remove dirt. While it starts almost immediately on my console, I cannot guarantee it will start on other consoles. This is an old item from decades ago, so it may require a few insertions and removals to work.