🔊 Hear the Difference with Power One! Expiration date on each package ensures peak performance. Compliant with child battery safety regulations. Designed for extended use in hearing aids. Mercury-free for a healthier planet. Extra-long tab for effortless handling. Eco-Friendly 1.45V Power Mercury-Free Power One Hearing Aid Batteries Size 312 offer a reliable and eco-friendly power solution for hearing aids. With 120 long-lasting, mercury-free batteries, each package is designed for user convenience and safety, ensuring you stay connected to the world around you.