Hear every moment with long-lasting power in Duracell Hearing Aid Batteries. Duracell Hearing Aid batteries are color-coded, making it easy to find the size that's right for you and guaranteed for four years in storage, so you can rest assured they will be ready when you need them. To help ensure the safety of children, they come in a child-secure packaging, which is nearly impossible to open without scissors. For all your hearing device needs, Duracell is the # 1 trusted battery brand.Size 312-Brown.