Rayovac Size 312 Hearing Aid Batteries are a premium solution for advanced hearing aid devices. No Size 312 Hearing Aid Battery lasts longer on ANSI & IEC performance tests. That?s performance you can trust! These Brown Tab Size 312 Batteries deliver peak performance for advanced features likes streaming video, audio and phone calls. The packaging is the most advanced ever from Rayovac, too. Long, wide tabs make handling these 312 batteries easy. Plus, these Brown Tab Hearing Aid Batteries Size 312 have a reclosable front facing door making it easier than ever to remove a single battery. The zinc air technology delivers clear sound through the entire life of the battery. You can trust the 4-year shelf life to ensure powerful performance for the entire package of 56 batteries.