Modern hearing aid batteries are significantly improved from those available in previous years. Modern hearing aid technologies not only produce clearer, better quality sound but are significantly smaller, most asthetically designed and capable of wireless streaming and IOT connectivity.
Typically, there are four main categories of hearing aid including:
Completely in the Canal
CIC or Invisible in the Canal (IIC) hearing aids are the smallest hearing aids available. They fit completely within the opening of the ear and are barely visable. Although barely noticeable, these hearing aids usually aren't powerful enough for a user with severe hearing loss and are very fiddly due to their site.
In the canal (ITC)
ITC hearing aids are slightly larger than CIC hearing aids, but stil fit within the opening of the ear. These hearing aids are fiddly due to their size.
Receiver in the ear (RITE)
RITE hearing aids are slightly visable, but less so than BTE hearing aids. This form of hearing aid includes a receiver in the ear, connected by a wire to a speaker placed inside the opening of the ear.
Behind the ear (BTE)
BTE hearing aids are the most common type of hearing aid. These devices consist of a receiver device which sits behind the ear which connects via a plastic tube to a moulded speaker which sits in the ear opening.
Please see the instructions of your brand of Hearing Aid to determine which batteries you should use to power your device.