Hearing Aid Batteries are called Zinc-Air Hearing Aid Batteries and differ from the regular alkaline batteries we often use, as they are activated when you peel the sticker off the battery.
This exposes the battery to the air in the environment, creating a chemical reaction once the sticker is peeled off
This being said, it is a good idea to leave the batteries alone until they are ready to be used, at which time you should take off the sticker from the battery.
In addition, since the batteries are stored in a dormant
state, they can take a few minutes to fully "activate". Thus, it is
best to peel the stickers off and wait 2-3 minutes before inserting
them into your hearing aids, otherwise there may not be enough of a
charge to run your hearing aids.
There
are many choices out there, with many brands of batteries. They are often found at your local
drug store and also at your hearing aid dispenser or Audiologist's office.