Rayovac Size 312 Hearing Aid Batteries (24 Pack), Size 312 Batteries No hearing aid battery lasts longer than Rayovac Size 312 Hearing Aid Batteries based on ANSI performance tests. Engineered with a balanced formula, the cells in each mercury-free size 312 battery provide consistent, high-quality performance for power-hungry hearing aid devices. Use these batteries in your listening devices and hearing aids for reliable hearing assistance. Longer, wider tabs make it easier to change the size 312...