These Duracell size 312 hearing aid batteries are designed to provide reliable power for behind-the-ear (BTE) hearing aids. These disposable batteries come in a convenient package of 8, with two packages included (16 total), with each battery guarantees up to 4 years in storage. Made with a zinc-air chemical composition, these brown size 312 batteries offer a voltage of 1.45 and are suitable for use in both ears. Manufactured in Germany by Duracell, these batteries are guaranteed to provide satisfaction and are a convenient solution for those in need of dependable hearing aid operation.