TL;DR
This guide demystifies hearing aid batteries, comparing disposable zinc-air batteries with rechargeable options (lithium-ion/NiMH). It details four standard sizes (10, 13, 312, 675), their lifespans (3-14 days), and compatibility with hearing aid styles. Key factors affecting battery life include usage patterns, Bluetooth use, and charging habits. Rechargeable batteries—like Nearity’s 36-hour HearPod Pro—offer long-term savings and eco benefits via programs like Call2Recycle. Practical tips include storing disposables in cool/dry conditions, disabling unused features, and avoiding overcharging. The conclusion emphasizes selecting batteries based on individual needs while prioritizing proper maintenance for optimal performance.
Have you ever been in the middle of an important conversation or a favorite activity, only to realize your hearing aids are dying? It's frustrating, right? And then there's the confusion of choosing the right battery — what size do you need? Should you go for disposable or rechargeable? Trust me, I've been there, and I know how overwhelming it can be. That's exactly why I decided to put together this comprehensive guide on hearing aid batteries. In this blog post, we'll cover everything you need to know about hearing aid batteries, from the different types available to how long they last and how to take care of them.
Types of Hearing Aid Batteries
When it comes to powering your hearing aids, you've got two main types of batteries to choose from: disposable and rechargeable. Each has its own set of features, advantages, and drawbacks. Let's break them down.
Disposable Batteries for Hearing Aids
Disposable batteries have been the go - to option for many hearing aid users for a long time. They're convenient, widely available, and easy to use.
Zinc - air batteries: The most common type, operation principle
Zinc - air batteries are by far the most popular type of disposable batteries for hearing aids. These batteries get their power from a chemical reaction that occurs when oxygen from the air combines with zinc inside the battery. Before you use a zinc - air battery, you'll notice a small tab covering a vent. When you remove this tab, you're essentially "activating" the battery by allowing air to enter. Once activated, the battery starts producing electricity, and it typically lasts for a few days to a couple of weeks, depending on various factors (more on that later).
One of the great things about zinc - air batteries is their consistent power output. They provide a steady stream of energy, which is important for the proper functioning of your hearing aids. Plus, they're relatively inexpensive and widely available at most pharmacies, grocery stores, and online retailers such as Walgreens Hearing Aid Batteries or Amazon Hearing Aid Center.
Mercuric oxide batteries: Historical use and replacement due to environmental concerns
Mercuric oxide batteries were once commonly used in hearing aids. They offered a reliable power source with a long shelf life. However, due to the presence of mercury, which is harmful to the environment, these batteries have largely been phased out. In many countries, there are strict regulations regarding the disposal of mercuric oxide batteries to prevent mercury from leaking into the soil and water. As a result, manufacturers have shifted towards more environmentally friendly options like zinc - air batteries.
Rechargeable Hearing Aid Batteries
In recent years, rechargeable hearing aid batteries have been gaining a lot of traction, and for good reason. They offer a more sustainable and convenient alternative to disposable batteries.
Lithium - ion rechargeable hearing aid batteries: Advantages, charging methods
Lithium - ion batteries are one of the most popular types of rechargeable batteries for hearing aids. One of the biggest advantages of lithium - ion batteries is their long - lasting power models like Nearity’s HearPod Pro can deliver up to 36 hours of use per charge, thanks to advanced lithium - ion technology. They also have a low self - discharge rate, so they retain power even when not in use. A single charge can often last a full day or even longer, depending on your usage. They also have a relatively low self - discharge rate, which means they don't lose their charge quickly when not in use.
When it comes to charging, there are a few different methods.
Some lithium-ion hearing aid batteries, like Signia's advanced systems, use inductive charging – simply place your hearing aids on a charging dock for wireless power. Others use pin - based charging, where you connect your hearing aids to a charger using small pins. Both methods are easy and convenient, and they eliminate the need to constantly buy and replace disposable batteries.
Nickel - metal hydride (NiMH) rechargeable batteries: Performance and maintenance
Nickel - metal hydride (NiMH) batteries are another option for rechargeable hearing aids. These batteries offer a good balance between cost and performance. They can store a decent amount of charge and are known for their durability. However, NiMH batteries do have a higher self - discharge rate compared to lithium - ion batteries, which means they may lose some of their charge if not used for an extended period.
Under the guidelines from the Battery University, maintenance of NiMH batteries involves proper charging routines. It's important not to overcharge or undercharge them, as this can reduce their overall lifespan. Most modern NiMH - compatible chargers have built - in safety features to prevent these issues, but it's still a good idea to follow the manufacturer's instructions.
Hearing Aid Battery Sizes
Now that we know about the different types of batteries, let's talk about the various hearing aid battery sizes. Understanding battery sizes is crucial because not all batteries fit all hearing aids.
Standard Sizes Explained
There are four main standard sizes of hearing aid batteries, each with its own unique characteristics and applications.
Size 10 hearing aid batteries: Features, common usage scenarios
Size 10 batteries are the smallest of the standard sizes. They're typically used in very small, discreet hearing aids, like completely - in - canal (CIC) and some in - the - canal (ITC) models. These batteries are great for users who want a nearly invisible hearing aid solution. However, because of their small size, they have a relatively lower power capacity compared to larger batteries. A size 10 battery usually lasts around 3 - 5 days, depending on usage.
Size 13 hearing aid batteries: Power capacity and device compatibility
Size 13 batteries are a bit larger than size 10 and offer more power. They're commonly used in behind - the - ear (BTE) and some ITC hearing aids. These batteries can last anywhere from 5 - 10 days, making them a good option for users who need a longer - lasting power source without having to constantly change the battery. Their increased power capacity also makes them suitable for hearing aids with more advanced features, like Bluetooth connectivity.
Size 312 hearing aid batteries: Design and applications
Size 312 batteries are similar in size to size 13 but have a slightly different design. They feature a small notch or tab, which makes them easier to handle, especially for users with limited dexterity. Size 312 batteries are often used in a variety of hearing aid styles, including some BTE, ITC, and in - the - ear (ITE) models. They typically provide a power lifespan of 4 - 8 days.
Size 675 hearing aid batteries: The largest size, suitable devices
Size 675 batteries are the largest of the standard sizes and offer the most power. They're commonly used in larger BTE hearing aids, especially those with features like powerful amplifiers or advanced wireless connectivity. Because of their size, they can last for 10 - 14 days or even longer in some cases. Size 675 batteries are a great choice for users who need a long - lasting battery and have hearing aids that require more power.
Choosing the Right Size for Your Hearing Device
Selecting the right size of battery for your hearing aid is essential. The wrong size battery simply won't fit in your device, and even if it does, it may not provide the right amount of power. When choosing a battery size, the first thing you need to consider is the type of hearing aid you have. Check your user manual or ask your audiologist which size battery is recommended for your specific model.
Another factor to consider is your usage patterns. If you use your hearing aids for long periods each day or have features that consume a lot of power, like Bluetooth streaming, you may want to opt for a larger battery size that offers more power and a longer lifespan. On the other hand, if discretion is your top priority and you don't mind changing the battery more frequently, a smaller size might be a better fit.
How Long Do Hearing Aid Batteries Last?
One of the most common questions I get asked about hearing aid batteries is, "How long do they actually last?" The answer isn't always straightforward, as there are several factors that can affect battery lifespan.
Factors Affecting Battery Lifespan
Hearing aid usage patterns: Continuous vs. intermittent use
The amount of time you spend wearing your hearing aids each day can have a big impact on battery life. If you wear your hearing aids for 12 - 14 hours a day, your batteries will likely run out faster than if you only wear them for a few hours. Similarly, if you use your hearing aids continuously throughout the day without turning them off during breaks, the battery will deplete more quickly. On the other hand, if you have an intermittent usage pattern, like only wearing your hearing aids when you're out and about or during specific activities, your batteries may last longer.
Device features: Bluetooth connectivity, advanced settings impact
Modern hearing aids come with a variety of features, and some of these can consume a significant amount of power. Features like Bluetooth connectivity, which allows you to stream audio from your phone or other devices directly to your hearing aids, use more battery power than basic amplification. Additionally, advanced settings like noise reduction, feedback cancellation, and directional microphones can also affect battery life. The more of these features you use, the faster your battery will drain.
Battery type: Disposable vs. rechargeable longevity comparison
As we discussed earlier, disposable and rechargeable batteries have different lifespans. Disposable zinc - air batteries typically last for a few days to a couple of weeks, depending on the factors mentioned above. Rechargeable batteries, on the other hand, can last for hundreds of charging cycles. A single charge of a rechargeable battery can power your hearing aids for a full day or more, but over time, the battery's capacity may decrease, and it may not hold a charge as well as it did when it was new.
Average Lifespan of Different Batteries
Estimated lifespan of disposable zinc - air batteries
As a general rule, size 10 disposable zinc - air batteries last around 3 - 5 days, size 312 batteries last 4 - 8 days, size 13 batteries last 5 - 10 days, and size 675 batteries last 10 - 14 days. Keep in mind that these are just estimates, and your actual battery life may vary based on your usage patterns and the features you use.
Charging cycles and service life of rechargeable batteries
Rechargeable batteries, especially lithium - ion ones, can typically last for 300 - 500 charging cycles. After that, the battery's capacity may start to decline significantly. For example, if you charge your lithium - ion hearing aid battery once a day, it could last you about 1 - 1.5 years before you notice a substantial decrease in its performance. NiMH batteries may have a slightly shorter lifespan, with around 200 - 300 charging cycles on average.
4 Key tips to maximize hearing aid battery life
Power Down When Not in Use
→ Turn off hearing aids during inactive periods (e.g., sleeping, showering).
→ Why it works: Prevents unnecessary battery drain (even in standby mode).
Manage Power-Intensive Features
→ Disable Bluetooth streaming when unnecessary (e.g., during in-person conversations).
→ Limit use of noise reduction/directional mics in quiet environments.
→ Example: Switching off Bluetooth during a coffee chat saves ~30% daily power.
Store Disposable Batteries Properly
→ Keep in cool, dry places (ideal: 15-25°C / 59-77°F).
→ Avoid humid areas (bathrooms) or hot spots (car dashboards/ windowsills).
→ Pro tip: Remove battery tabs only when ready to use – exposure to air activates discharge.
Optimize Rechargeable Battery Care
→ Follow manufacturer charging instructions precisely.
→ Avoid extremes:
❌ Overcharging: Unplug when fully charged
❌ Deep discharging: Recharge before battery completely drains
→ Critical: Use only approved chargers to prevent damage.
Rechargeable Options: A Deeper Dive
Rechargeable hearing aid batteries offer a lot of benefits, but there's more to them than just convenience. Let's take a closer look at why they might be the right choice for you.
Benefits of Rechargeable Hearing Aid Batteries
Convenience, cost savings in the long run
One of the biggest advantages of rechargeable batteries is the convenience they offer. No more running out to the store to buy a pack of disposable batteries at the last minute. With rechargeable batteries, you simply place your hearing aids on the charger at night, and they're ready to go in the morning.
In the long run, rechargeable batteries can also save you money. While the initial cost of hearing aids with rechargeable batteries may be higher, over time, you'll no longer have to keep buying disposable batteries. This can add up to significant savings, especially if you use your hearing aids frequently.
Environmental friendliness compared to disposable batteries
Disposable batteries contribute to significant waste. Each discarded battery ends up in landfills, where it risks releasing harmful chemicals into the environment. Rechargeable batteries offer a far more sustainable alternative – by reusing the same battery hundreds of times, you dramatically reduce landfill waste. Maximize your eco-impact through responsible recycling programs like Call2Recycle's 3-Step Process, which offers mail-in, retail drop-off, and community event options for retired rechargeable.
Charging Technologies and Accessories
Inductive charging vs. pin - based charging
As mentioned earlier, there are two main types of charging methods for rechargeable hearing aids: inductive and pin - based. Inductive charging is a wireless method. You simply place your hearing aids on a charging dock, and the battery charges through electromagnetic induction. This method is great because there are no cables or pins to worry about, and it's very easy to use.
Pin - based charging, on the other hand, involves connecting your hearing aids to a charger using small pins. While this method requires a bit more handling, it can be more reliable in some cases, especially if you're worried about the hearing aids not making proper contact with the charging surface in an inductive charger.
Portable chargers and home charging stations
In addition to the standard chargers that come with your hearing aids, there are also portable chargers and home charging stations available. Portable chargers are great for when you're on the go. They allow you to charge your hearing aids anywhere, whether you're on a long trip, at work, or out and about. Home charging stations, on the other hand, are designed to be placed on your nightstand or in a convenient location at home. They often have features like charging indicators and can charge multiple devices at once.
Maintenance and Care
Taking good care of your hearing aid batteries is essential for ensuring they last as long as possible and perform at their best.
Best Practices for Disposable Batteries
Proper storage, handling to prevent leakage
When storing disposable batteries, keep them in a cool, dry place away from direct sunlight and heat sources. Avoid storing them in your car's glove compartment during hot weather, as the high temperatures can cause the batteries to leak. When handling the batteries, make sure your hands are clean and dry. Moisture or dirt on your hands can cause the battery to corrode or leak.
Safe disposal methods
Disposing of disposable batteries properly is important for the environment. Many communities have specific guidelines for battery disposal. In some areas, you can take your used batteries to a recycling center or a drop - off location at a local store. Never throw your batteries in the regular trash, as this can lead to environmental pollution.
Maintenance of Rechargeable Batteries
Charging routines to extend battery life
To extend the lifespan of your rechargeable batteries, it's important to follow a regular charging routine. Avoid overcharging the battery, as this can cause the battery to degrade over time. Most modern rechargeable hearing aids have built - in safeguards to prevent overcharging, but it's still a good idea to unplug the charger once the battery is fully charged.
Similarly, try not to let the battery run completely dead before charging it. Lithium - ion batteries, in particular, perform best when they're charged before they reach a very low level of charge.
Troubleshooting common rechargeable battery issues
If you notice that your rechargeable hearing aid battery isn't charging properly or isn't holding a charge as well as it used to, there are a few things you can check. First, make sure the charging contacts on your hearing aids and the charger are clean. A small amount of dirt or debris can prevent the battery from charging. You can gently clean the contacts with a soft, dry cloth.
If the problem persists, it could be a sign of a more serious issue, like a faulty battery or charger. In this case, it's best to contact your audiologist or the manufacturer for further assistance.
Conclusion
In conclusion, understanding hearing aid batteries is key to getting the most out of your hearing aids. We've covered a lot of ground in this article, from the different types of batteries for hearing aids, including disposable and rechargeable options, to the various hearing aid battery sizes and how long they last. We've also explored the benefits of rechargeable hearing aid batteries, the different charging technologies, and how to take care of both disposable and rechargeable batteries.
When it comes to choosing the right battery for your needs, there's no one - size - fits - all answer. It depends on your usage patterns, the features you want in your hearing aids, and your personal preferences. Whether you opt for the convenience of rechargeable batteries or the simplicity of disposable ones, the most important thing is to make sure you're taking good care of your batteries to ensure they provide reliable power for your hearing aids.
FAQs
Q: Can I use any type of battery in my hearing aid?
A: No, it's important to use the type and size of battery recommended by the manufacturer of your hearing aid. Using the wrong battery can damage your hearing aid or prevent it from working properly.
Q: How do I know when my hearing aid battery is running low?
A: Most modern hearing aids have a battery indicator that will alert you when the battery is running low. This can be a visual signal, like a flashing light, or an audible beep.
Q: How do rechargeable hearing aid batteries compare to disposable ones in terms of cost?
A: Rechargeable options like the Nearity's HearPod Pro have a higher upfront cost since they’re often integrated into the hearing aid device. However, they save money long - term: a single rechargeable battery can last 1 - 1.5 years (500+ charges), while disposable users might spend $50 - $100 annually on batteries. Over 3 years, rechargeables can save $150 - $300 compared to disposables.
Q: Can extreme temperatures affect hearing aid battery life?
A: Yes—both disposable and rechargeable batteries are sensitive to temperature. Disposable zinc - air batteries drain faster in hot, humid environments (e.g., car glove compartments in summer), while rechargeable lithium - ion batteries like those in the HearPod Pro perform best at 15 - 25°C (59 - 77°F). Avoid exposing batteries to freezing temperatures or direct sunlight, as this can reduce lifespan or cause leakage.
