The 544 Rayovac Size 10 Hearing Aid Batteries are unit-sized batteries designed specifically for hearing aids. With a voltage of 1.45V and a chemical composition of Zinc-Air, these batteries provide long-lasting power for your hearing aids, ensuring that you can communicate effectively and hear clearly throughout the day. The yellow color indicates the size 10 battery, making it easy to identify and replace when needed. These ARE expired batteries. from expiration dates 2022-2025. this huge lot is ideal for nurses homes or assisted living facilities. A17 (5) Packs of 24 (17 )Packs of 16 (19) Packs of 8