Our new CR2032 Battery Replacement Kit is extra durable and safe with our new bitter taste feature. Each kit has three replacement batteries and a tiny teeny screwdriver designed explicitly for your sound book. The CR2032 battery provides more extended playtime than the battery included in your sound book, allowing your little one to enjoy music non-stop. To ensure you purchase the correct battery kit, check the back of your book for a battery compartment similar to the one pictured. If it doesn't match, look for our AG10 Battery Kit instead.