Rayovac Proline Advanced Mercury-Free Hearing Aid Batteries Size 312 (44-Count Box) - Long-Lasting Power for Clear Hearing - Perfect for Travel, Work & Daily Use

My ENT told me to get these batteries as they will outlast all the others. He was right. I've used these since I first got hearing aids in 2015 or so. No issues ever. I carry spare ones in my case inside my purse just in case, but I've only had to use those a time or two but only because I forgot to change them on my regular night. Saturday so they are nice and fresh for Sunday School and church. Don't want to miss anything!