How long do hearing aid batteries last?

Hearing aid batteries come in four standard sizes, each identified by a specific color code. These codes not only help users quickly recognize the right battery type but also correspond to certain hearing aid styles. Below is a breakdown of each size, its color, typical device compatibility, and average lifespan:

• Battery size 675, blue packaging, BTE style: 7-10 days
• Battery size 13, orange packaging, BTE, ITC, ITE styles: 5-7 days
• Battery size 312, brown packaging, Mini BTE, RIC, Mini RIC, CIC, ITC, ITE styles: 4-5 days
• Battery size 10, yellow packaging, CIC and IIC styles: 3-4 days

Tips to extend hearing aid battery life

To get the most life out of your hearing aid batteries, try some of these simple, yet effective tips:

How long does a hearing aid battery last? Average lifespan

Hearing aid batteries typically last between 3 to 10 days, depending on several factors. These include the battery type and capacity, how often the hearing aid is used, and the specific make and model of the device.

For instance, behind-the-ear (BTE) hearing aids often use larger batteries, which generally provide longer usage times. In contrast, smaller batteries used in custom or in-the-ear (ITE) hearing aids usually have shorter lifespans.

How long does rechargeable hearing aids last?

Rechargeable hearing aids typically last a full day on a single charge, usually between 16 to 30 hours, depending on the model, battery capacity, and how the device is used (e.g. streaming audio may drain the battery faster). As for the long-term battery lifespan, most rechargeable hearing aids use lithium-ion batteries, which can last around 3 to 5 years before they start to lose capacity and may need replacement. Some models use silver-zinc batteries, which may require annual replacement but are often user-replaceable. So:

• Daily use per charge: 16–30 hours
• Battery lifespan: 3–5 years (for lithium-ion)

After a few years, you may need to replace the battery or, in some cases, the entire hearing aid if the battery isn't replaceable.

How to Extend Hearing Aid Battery Life

Maximizing your battery life doesn’t require much effort—small changes in daily habits can make a significant difference. Here’s how to get the most out of your batteries:

• Check the Expiry Date: Hearing aid batteries typically have a shelf life of up to four years. Using batteries that are close to or past their expiration date can result in weaker performance. Always check the date before inserting a new battery and use older ones first to prevent waste.
• Avoid Stockpiling: Instead of buying batteries in bulk, keep a 1–2-month supply. This ensures you're always using fresh batteries at their peak performance.
• Store Batteries Properly: Keep batteries in a dry, room-temperature location. Avoid humid areas like bathrooms, kitchens, or laundry rooms, as moisture can cause batteries to drain prematurely.
• Wash Your Hands Before Handling: Oil, dirt, and moisture from your hands can affect battery performance. Always handle batteries with clean, dry hands to reduce the risk of contamination.
• Don’t Remove the Tab Until You’re Ready: Most hearing aid batteries are zinc-air and only activate when exposed to air. Keep the tab on until you're ready to use the battery to avoid unnecessary power loss.
• Wait Two Minutes After Removing the Tab: After peeling off the tab, wait about two minutes before placing the battery in your device. This allows oxygen to fully activate the battery for optimal performance.
• Remove Batteries Overnight: When not in use—especially overnight—remove the batteries and leave the compartment open. This helps air out moisture and conserves battery power.
• Use a Dehumidifier: Using a hearing aid dehumidifier overnight (with batteries removed and the door open) can prevent moisture-related damage, prolonging the life of both your hearing aids and batteries.

Maximizing your battery life doesn’t require much effort—small changes in daily

Storing hearing aid batteries in the refrigerator is a common myth, but it doesn’t extend their lifespan. In fact, cold and damp environments can damage batteries, reduce their voltage, and affect performance. Zinc-air batteries, commonly used in hearing aids, are particularly sensitive to moisture, which can activate them prematurely or cause corrosion.

For best results, store batteries at room temperature in a dry place away from heat and humidity. Avoid storing them in bathrooms, kitchens, and refrigerators. Keeping batteries in their original packaging until use also helps preserve freshness. Proper storage ensures your hearing aid batteries deliver reliable and consistent power.

How long does it take to charge hearing aids?

Charging time for hearing aids depends on the model and battery type, but most rechargeable hearing aids take between 3 to 5 hours to reach a full charge. Many models can provide up to 30 hours of use on a single charge, making overnight charging a convenient option. Some devices also offer quick-charge features, delivering several hours of use with just a short 15–30-minute charge. To ensure optimal battery health and performance, it’s best to follow the manufacturer’s charging instructions. Using the official charging dock or case provided with the hearing aids helps maintain consistent, reliable charging over time.

Are hearing aids with rechargeable batteries more moisture resistant?

Yes, hearing aids with rechargeable batteries are generally more moisture resistant than those using disposable batteries. This is because rechargeable hearing aids are typically designed with sealed battery compartments, which helps prevent moisture, dust, and debris from entering the device. In contrast, disposable battery compartments need to be opened frequently, increasing the risk of moisture exposure.

Additionally, many rechargeable models come with protective coatings and moisture-resistant housing, offering better overall durability. While no hearing aid is completely waterproof, rechargeable devices often hold up better in humid environments or during an active lifestyles. Still, using a dehumidifier overnight is recommended for all types.