GAMEBOY GAME-SAVER: Mart Cobra’s CR1616 batteries restore save functionality in Game Boy Advance cartridges. Replace the old battery to keep your favorite adventures and progress safely stored. PREMIUM QUALITY: Our CR 1616 3v lithium coin batteries are 16 x 1.6 mm and weigh about 1.6 grams per coin battery. With a long-lasting performance, our batteries stayed charged longer losing less than 3% per year when kept at room temperature. GREAT VALUE: Includes ten CR1616 3V lithium batteries with solder tabs for cartridge save battery replacement. Dependable performance for GBA cartidge replacements, restoring classic handheld game saves. EASY INSTALLATION: Use a 3.8 mm screwdriver to open the GameBoy cartridge. Carefully remove the old battery. Insert a new CR1616 tabbed battery in the right orientation. Solder the tabs. Close the cartridge and test by saving your game progress. HIGH-PERFORMANCE CHOICE: Opt for our 10-pack of CR1616 batteries, the ultimate power source for your gaming needs. Perfect for GameBoy Advance cartridges, GameBoy SP, & more. Reliable 3V lithium round batteries designed for long-lasting use Power up your Gameboy cartridges with the Mart Cobra 10-Pack Tabbed CR1616 Battery with Solder Tabs. These 3V lithium batteries are perfect for Gameboy Advance SP Fire Red, Leaf Green, and Emerald games, ensuring your GBA game saves are secure and reliable. Compatible with Nintendo gameboy and gameboy advance cartidges.