Longest lasting size 13 hearing aid batteries. These orange tab size 13 batteries deliver consistent sound quality across their life span for a better hearing experience. They are also designed to prevent damaging leaks and premature low battery signals. The premium perforated packaging is more discrete and portable than the previous design. Just spin the double-sided battery dial to access the battery, install in your device with the long tabs, and easily lock the battery door to keep remaining batteries safely inside.