The four sizes of hearing aid batteries are listed below along with their standard number and color codes.
Today’s hearing aid batteries are “zinc-air.” Because the batteries are air-activated, a factory-sealed sticker keeps them “inactive” until you remove the sticker. Once the sticker is removed from the back of the battery, oxygen in the air contacts the zinc within the battery, and the battery is “turned-on”. So, don’t remove the tab until you are ready to use the battery. Zinc-air batteries have a “shelf life” of up to three years when stored in a cool, dry environment.
It is safer to store batteries in room temperature; storing in cool or hot place shortens their life. It is also important to keep open the hearing aid battery compartment at night to allow moisture to evaporate. If the battery gets wet, take it out dispose it off and insert a fresh battery.
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