Which Cell Is Used in Hearing Aids? Types, Sizes & Life
Which Cell Is Used in Hearing Aids?
If you or a loved one wears a hearing aid, you have probably wondered, "which cell is used in hearing aids?" This is one of the most common questions patients ask at VR Speech and Hearing Clinic. The short answer is that most hearing aids run on zinc-air button cells, though modern rechargeable hearing aids now use lithium-ion batteries. Understanding the type of cell your device needs, how long it lasts, and how to care for it can make a big difference in your daily hearing experience.
In this article, we explain everything about hearing aid batteries in simple language, so you can choose, replace, and maintain them with confidence.
What Type of Cell Is Used in Hearing Aids?
The most widely used cell in hearing aids is the zinc-air battery. Unlike regular batteries, a zinc-air cell is activated by oxygen from the air. Each battery comes with a small sticker tab on the back. Once you remove the tab, air enters the cell and activates a chemical reaction that powers your hearing aid. This is why zinc-air batteries are also called "activated by air" batteries.
Zinc-air cells are popular because they are:
Small and lightweight, which suits the compact design of hearing aids
Long lasting compared to their size
Free from mercury, making them safer for the environment
Affordable and widely available at pharmacies and clinics
Apart from zinc-air batteries, many newer hearing aid models now come with built-in rechargeable lithium-ion cells. These cells do not need to be replaced daily or weekly. Instead, users simply place the hearing aid in a charging dock overnight.
Common Sizes of Hearing Aid Batteries
Zinc-air batteries used in hearing aids come in four standard sizes, each identified by a color code and a number. Knowing your battery size is important when buying replacements.
Size 10, yellow tab, used in smaller and mini hearing aids
Size 312, brown tab, common in many behind the ear and in the ear models
Size 13, orange tab, used in medium sized devices
Size 675, blue tab, typically used in powerful behind the ear hearing aids for severe hearing loss
Your audiologist at VR Speech and Hearing Clinic can confirm which size fits your specific hearing aid model, so you never buy the wrong batteries.
How Long Does a Hearing Aid Battery Last?
Battery life depends on several factors, including the size of the cell, how many hours a day the hearing aid is worn, and the settings used, such as Bluetooth streaming or high power settings. On average:
Size 10 batteries last around three to seven days
Size 312 batteries last around three to ten days
Size 13 batteries last around six to fourteen days
Size 675 batteries last around nine to twenty days
Rechargeable lithium-ion hearing aids usually offer around sixteen to twenty four hours of use on a single full charge, which is convenient for people who prefer not to handle small batteries.
Zinc-Air vs Rechargeable Lithium-Ion Cells
Many patients at our clinic ask which option is better, disposable zinc-air batteries or rechargeable lithium-ion cells. Both have their advantages.
Zinc-air batteries are simple, low cost, and widely available, making them a good choice for people who travel often or want a backup option that does not require electricity. However, they need regular replacement and can be difficult for people with limited finger dexterity to handle.
Rechargeable lithium-ion batteries are more convenient for daily use since there is no need to buy or replace tiny batteries. They are also more environmentally friendly in the long run, since one rechargeable cell can last several years. The main consideration is that you must charge the hearing aid every night, so it is important to have consistent access to a power source.
Tips to Extend Hearing Aid Battery Life
Whether you use zinc-air or rechargeable cells, proper care helps your hearing aid perform at its best.
Store spare zinc-air batteries at room temperature, not in the refrigerator
Wait about one minute after removing the tab before inserting the battery, to allow the cell to fully activate
Keep the battery compartment open at night if you are not using a dehumidifier, to let the device air out
Keep batteries away from moisture and extreme heat
Clean the battery contacts gently with a dry cloth to remove earwax or debris
For rechargeable hearing aids, charge the device fully every night and avoid letting it drain completely too often
Signs Your Hearing Aid Battery Needs Replacement
It helps to recognize the early signs of a low battery so you are not caught without sound at an important moment. Common signs include a weak or distorted sound, a beeping alert from the device, sound cutting in and out, or the hearing aid switching off completely. If you notice any of these signs, it is time to replace the battery or recharge the device.
Why Choosing the Right Battery Matters
Using the correct cell type and size is essential for the smooth functioning of your hearing aid. An incorrect battery size may not fit properly or may not provide enough power for your device. Using low quality or expired batteries can also affect sound clarity and may even damage the hearing aid over time. This is why it is always recommended to purchase batteries from a trusted source and consult your audiologist if you are unsure about compatibility.
Get Expert Guidance at VR Speech and Hearing Clinic
At VR Speech and Hearing Clinic, our experienced audiologists help patients select the right hearing aid and the right battery type based on their lifestyle, hearing loss level, and comfort needs. Whether you prefer traditional zinc-air batteries or the convenience of rechargeable lithium-ion technology, our team is here to guide you every step of the way, from hearing tests to device fitting and ongoing support.
If you have more questions about hearing aid batteries or need a hearing evaluation, visit VR Speech and Hearing Clinic today for personalized care and expert advice.
Frequently Asked Questions
1. Which cell is commonly used in hearing aids?
The most common cell used in hearing aids is the zinc-air battery, which activates when exposed to air after removing its protective tab.
2. What are the different sizes of hearing aid batteries?
Hearing aid batteries come in four standard sizes, size 10, size 312, size 13, and size 675, each identified by a specific tab color.
3. How long does a hearing aid battery last?
Depending on the size and usage, hearing aid batteries can last anywhere from three days to about three weeks.
4. Can hearing aids use rechargeable batteries?
Yes, many modern hearing aids come with built in rechargeable lithium-ion batteries that can be charged overnight instead of replaced.
5. Why does a hearing aid battery need air to work?
Zinc-air batteries use oxygen from the surrounding air to trigger a chemical reaction that generates power, which is why the tab must be removed before use.
6. Is it safe to store hearing aid batteries in the refrigerator?
No, it is not necessary or recommended. Hearing aid batteries should be stored at normal room temperature in a dry place.
7. Where can I get help choosing the right hearing aid battery?
You can visit VR Speech and Hearing Clinic, where our audiologists can help you identify the correct battery type and size for your specific hearing aid model.
