Replace the batteries in your child's sound book with our AG10 Battery Replacement Kit. Our kit includes 9 batteries for up to 1 hour and 20 minutes of continuous music and a tiny screwdriver perfect for the job. Designed specifically for our books, please make sure the battery case matches the ones in our images before purchase. For other books, we recommend our CR2032 battery kit. Keep the music playing with our AG10 Battery Replacement Kit.