This is an official Nintendo product. I DO NOT sell counterfeit/bootleg games. All official Fire Red and Leaf Green cartridges use a FLASH chip to retain save data. FLASH memory is non-volatile, and doesn't require a battery at all.Fake cartridges use an SRAM chip and a battery to retain save data. Once the battery runs dry in a fake cartridge, the save data will be lost. Feel free to ask any questions. The item "AUTHENTIC Pokemon Fire Red Version GameBoy Advance Cartridge GBA GENUINE" is in sale since Monday, August 26, 2019. This item is in the category "Video Games & Consoles\Video Games". The seller is "ptw-g" and is located in Lee, Florida. This item can be shipped to United States, all countries in Europe, Canada, Mexico, Brazil, Australia.