Batteries for hearing aids come in five different sizes. The good thing is that hearing aid batteries are color coded. The largest size is 675 or blue. The two most common sizes are 13 or orange and 312 or brown. The two smallest sizes are 10 or yellow and 5 which are red.
Most batteries are zinc-air and must have the tabs removed to activate the power. If you look closely, there are air-holes under the tab. When the tab is removed, air flows into the battery and charges it up. It can take up to two minutes for the battery to become fully charged.
How Long Do Hearing Aid Batteries Last?
Hearing aids generally use batteries that require changing about every five to ten days if worn regularly. However, there are a variety of factors that affect the battery life in a hearing aid. If the person’s hearing is severe to profound, the battery drain is higher and therefore will have less battery use length. The smaller the battery, the less the battery life will be.
Humidity and Temperature Affect Hearing Aid Battery Life
If the humidity is too dry, such as our homes in the winter months, the batteries can dry out, reducing battery life. On the other hand, high humidity can cause batteries to take on moisture and cause swelling. This also reduces the battery life. Removing the batteries at night and keeping your hearing aids in a dehumidifier can help lengthen battery life.
Low temperatures can affect battery voltage and reduce battery life. Interestingly, if you live in the mountains where there is less oxygen, battery life will be reduced. Wearers should also be aware that batteries are susceptible to moisture, such as humidity and dirt. The tiny holes in the zinc-air batteries that allow the air into the cavity to activate the battery also can become clogged with dirt or moisture and can give spotty performance or fail more quickly.
Our board-certified audiologists offer a wide range of hearing aids, batteries, and accessories, helping patients of all ages to hear as clearly as possible. Call the number on this page or fill out our online contact form to learn more about our services.