New battery holder type replacement. New battery replacement, maintenance completed. Using a test battery, startup and operation confirmed on a Super Famicom. Disinfected with anhydrous ethanol. Because The Great Battle of the Shellfish 2, which uses PLG system's special system, has a fast battery drain, a holder type is installed. If you have a special screwdriver, you can replace the battery yourself. The cartridge terminals have been polished and cleaned with anhydrous ethanol and abrasive, removing dirt. Maintenance has been performed to the point that it almost starts up on the first try on our console, but we do not guarantee first-try startup on compatibility machines or other consoles. This is an old product from several decades ago, so it may not start up unless inserted and removed a few times. A new battery will be installed before shipping. Thank you.