A Comprehensive Guide to Hearing Aid Battery Sizes

Your Comprehensive Guide to Hearing Aid Battery Sizes 

The hearing aid industry continues to demonstrate rapid innovation and revolutionary development as electronic components become smaller, more sophisticated, and much more powerful than ever before.  

But one thing remains constant with virtually all electronic devices, and hearing aids are no exception – they need batteries.  

Whether powered by standard or rechargeable versions, knowing the differences among today’s hearing aid batteries will help you get the most out of your device. Let’s shed light on the various considerations as we outline all the types, sizes, capacities, and performance levels of every hearing aid battery available on the market. This article will give you everything you need to know about the small batteries that spark your everyday sound perception.  

A Glimpse at How Hearing Aid Batteries Work 

The inner workings of hearing aid batteries reveal an elegant, eco-friendly process. Modern hearing aids primarily use zinc-air batteries, chosen for their constant voltage and environmental benefits. Zinc-air batteries operate through a simple yet innovative mechanism. Each battery contains small perforations on its surface, permitting air to flow inside. The flow of air triggers a chemical reaction with the zinc content, forming zinc oxide. This reaction produces a steady stream of energy essential for powering your hearing aid.  

This process doesn't start until the battery is ready for use. Each zinc-air battery comes sealed with a protective foil to prevent premature air entry. Removing the foil allows air to enter and initiate the reaction. It may take a few moments for your device to receive power, so be patient.  

Once the foil is removed, the battery begins to discharge and cannot be stopped. For optimal performance, only peel the foil when you're ready to use the battery, and consider waiting two minutes before inserting it into your hearing aid.  

The Rise of Rechargeable Hearing Aid Batteries 

Rechargeable batteries have become a mainstay in the modern era, offering a sustainable and convenient alternative to traditional disposable options. These batteries eliminate the hassle of frequent replacements and the environmental impact of disposal.  

Instead of changing batteries regularly, simply recharge them overnight. The simplicity of placing your hearing aids in a charging station before bedtime and waking up to a full day’s power is game-changing. There are various hearing aid models equipped with these rechargeable batteries, ensuring compatibility with diverse needs. Consult your audiologist to explore if rechargeable batteries align with your hearing requirements for a seamless and eco-friendly hearing experience.  

What Hearing Aid Battery Size Do I Need?  

Hearing aid batteries come in four main sizes: 10, 13, 312, and 675. These sizes are color-coded for easy identification, making it simpler to find the right one. Size 10 batteries are yellow, 13 are orange, 312 are brown, and 675 are blue. This color-coding system helps avoid confusion.  

Each size is designed to fit specific types of hearing aids and provide different levels of power and lifespan. While additional codes like A, PR, S, ZD, ZA, V, DA, or ZL may appear, they are less crucial and don’t impact the size specification. If you're unsure which battery size fits your device, refer to the old packaging or your hearing aid manual.  

Size 10 (Yellow) 

Size 10 batteries are the smallest and are typically used in completely-in-canal (CIC) and some in-the-ear (ITE) hearing aids. Due to their size, they provide less power but are ideal for those who prefer discrete devices.  

• Diameter: 5.8 mm 

• Height: 3.6 mm 

• Capacity: 100 mAh 

• Voltage: 1.4 V 

Size 13 (Orange) 

These slightly larger batteries are often found in behind-the-ear (BTE) and some in-the-ear (ITE) hearing aids. They offer a good balance between size and power, making them versatile for various hearing aid models.  

• Diameter: 7.9 mm 

• Height: 5.4 mm 

• Capacity: 310 mAh 

• Voltage: 1.4 V 

Size 312 (Brown) 

Size 312 batteries are popular for in-the-ear (ITE) and some behind-the-ear (BTE) hearing aids. They are known for their moderate size and power, providing a convenient choice for many users.  

• Diameter: 7.9 mm 

• Height: 3.6 mm 

• Capacity: 180 mAh 

• Voltage: 1.4V 

Size 675 (Blue) 

The largest of the four, size 675 batteries, are used in powerful behind-the-ear (BTE) hearing aids. They deliver the highest level of power and are ideal for devices that require more energy due to advanced features or severe hearing loss.  

• Diameter: 11.6 mm 

• Height: 5.4 mm 

• Capacity: 650 mAh 

• Voltage: 1.4 V 

How to Insert a Hearing Aid Battery 

Start by removing the adhesive foil from the new battery and give it around two minutes to fully activate. Once ready, carefully align the battery with the positive (+) and negative (-) symbols in the battery compartment of your hearing aid. If the battery compartment doesn't close easily, it could mean the battery is inserted incorrectly.  

Should your hearing aid not function after a battery change, inspect the compartment for any dirt or debris, as contamination can disrupt the connection. For ease, many manufacturers include a handy magnetic tool to assist in battery placement.  

How to Properly Store Hearing Aid Batteries 

To ensure the longevity and safety of your hearing aid batteries, store them at room temperature, ideally between 50°F and 77°F. Avoid placing batteries in the refrigerator or exposing them to direct sunlight. Always keep them out of children's reach. When they run out, promptly remove them to prevent leaking or swelling and maintain your device's functionality.  

Dispose of Your Hearing Aid Batteries Responsibly 

Used hearing aid batteries require responsible disposal. Standard hearing aid batteries cannot be recharged, so don't just throw them away when they run out. Instead, bring your used button cells to your local audiology center or a designated collection point. Proper disposal helps protect the environment and ensures that toxic materials are handled safely. By following these steps, you contribute to a more sustainable and eco-friendly community while maintaining the integrity of your hearing aids.  

AudioNova – Your Source for All Your Hearing Aid Needs 

At AudioNova, we proudly offer a wide range of hearing aid batteries and accessories to ensure your devices always function at their best. Visit an AudioNova hearing clinic and consult with our hearing aid specialists for hassle-free hearing aid maintenance. Whether you need new batteries or expert advice, we are here to support your hearing health. Let's make sure your hearing aids perform optimally every day. Contact us today to find out more about our services and products.