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16-pack of Energizer 312 batteries for hearing aids, brown tab LONGEST LASTING: These longest-lasting 312 hearing aid batteries from Energizer are suitable for a variety of hearing devices TRUSTED POWER: Energizer hearing aid batteries size 312 deliver up to 3 hours more wireless streaming than the leading competitor RELIABLE: Each Energizer 312 battery holds power for up to 4 years in storage, so they're always ready when you need them ENERGIZER INNOVATION: From the makers of the world's first commercially-available zero mercury hearing aid battery