Why does a watch battery lasts so much longer than a hearing aid battery?
A hearing aid is a marvelous, miniature, electronic device with a microphone, an amplifier, a sound processor, and a speaker. It may also have a volume control and memory button or may handle these processes automatically. All these components draw much more power than the hands on a wristwatch. In addition, state-of-the art hearing aids are constantly monitoring incoming sounds and making adjustments for better speech understanding. This requires increased power when a hearing aid user is in noisy listening situations, like a restaurant.
