Rely on the longest-lasting zero-mercury hearing aid batteries from Energizer! Now up to 30% longer than previous designs in wireless devices, Energizer’s EZ Turn & Lock Hearing Aid batteries are easier than ever to open, handle and insert. The convenient 100% recyclable packaging has simple access in the back tom remove one battery at a time, and the longer tab makes it easy to insert the battery into your hearing aid. Each battery size is color coded so you can be assured of choosing the correct size every time.