Product Review
NEW Rayovac Mercury-Free Proline Advanced Size 312, Total of 96 Hearing Aid Batteries. Proline Advanced Mercury Free is the world's longest lasting hearing aid battery. Rayovac Proline Advanced Mercury Free delivers 30% more battery life than other mercury-free hearing aid batteries. Rayovac Proline is environmentally friendly, with consistent power and performance that rivals mercury-containing products on the market today.