Hearing Aid Batteries: Everything You Need to Know
Last Your Hearing Update:Â 06/01/2026
Hearing aid batteries are small but mighty—they power the technology that keeps you connected to the world around you. Whether you're using traditional disposable batteries or modern rechargeable models, understanding how they work can help you get the most from your hearing aids.
Types of hearing aid batteries
Most traditional hearing aids use zinc-air batteries, which come in four standard sizes identified by colour-coded packaging: yellow (size 10), brown (size 312), orange (size 13), and blue (size 675). These batteries are activated by air, so they start working as soon as you remove the protective tab. Once activated, they can't be "switched off"—they'll continue draining until empty.
The size you need depends on your hearing aid model. Smaller, discreet hearing aids typically use size 10 batteries, whilst larger Behind-the-Ear (BTE) models often require size 13 or 675 batteries. Your audiologist will tell you which size your hearing aids need.
How long do hearing aid batteries last?
Battery life varies depending on the size, your hearing loss level, and how much you use features like Bluetooth streaming. Generally, size 10 batteries last 3-5 days, size 312 last 7-10 days, size 13 last 10-14 days, and size 675 can last up to 20 days.
Streaming audio from your phone or television drains batteries faster, as does severe hearing loss requiring more amplification. Cold weather can also reduce battery life, so it's worth keeping spare batteries handy during the winter months.
Rechargeable hearing aids: a modern alternative
Rechargeable hearing aids have transformed the experience for many users, particularly elderly people who struggle with the fiddly nature of tiny batteries. These models use built-in lithium-ion batteries—similar to your smartphone—and simply need to be placed in a charging dock overnight.
Most rechargeable hearing aids provide 16-24 hours of power on a single charge, with some premium models offering up to 51 hours. A full charge typically takes 3-4 hours, whilst a quick 30-minute charge can provide several hours of use in a pinch. Rechargeable batteries generally last 4-5 years before needing replacement, which is usually done by your audiologist.
Tips for extending battery life
To get the most from your hearing aid batteries, wait 60 seconds after removing the protective tab before inserting the battery—this allows it to fully activate. When you're not wearing your hearing aids, open the battery compartment to let moisture escape and switch them off, which also extends battery life for disposable types.
Store spare batteries at room temperature in a dry place, and keep them away from coins or metal objects that could cause a short circuit. Never store batteries in the fridge—despite old myths, this actually reduces their effectiveness. Check expiry dates when buying batteries and use older stock first.
Signs your batteries need changing
Your hearing aids will usually warn you when batteries are running low, either through beeping sounds or voice alerts. You might also notice reduced volume, distorted sound, or intermittent cutting out. Some hearing aids have indicator lights that flash when battery power is low.
Don't wait until batteries die completely—keep spare batteries with you at all times. Many hearing aid users keep a pack in their wallet, car, or handbag to avoid being caught out.
Disposing of hearing aid batteries safely
Zinc-air batteries contain harmful materials and shouldn't be thrown in regular household waste. Many hearing aid providers, pharmacies, and supermarkets offer battery recycling schemes. Some councils also collect them as part of household recycling programmes. Check with your local authority or hearing aid provider for the nearest recycling point.
Making the right choice
Whether you choose traditional disposable batteries or rechargeable hearing aids depends on your lifestyle and preferences. Disposable batteries offer the convenience of quick swaps and work well if you're away from power sources regularly. Rechargeable models eliminate the ongoing cost and environmental impact of disposables whilst offering hassle-free charging.
Speak with your audiologist about which option best suits your needs. They can advise on battery types, demonstrate proper changing techniques, and help you make an informed decision about your hearing aid power source.
Good battery management ensures your hearing aids are always ready when you need them, keeping you connected to conversations, entertainment, and the sounds that matter most.
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 Hearing aid batteries FAQs
1. How long do hearing aid batteries last?
Battery life depends on size and usage. Size 10 batteries last 3-5 days, size 312 last 7-10 days, size 13 last 10-14 days, and size 675 can last up to 20 days.
2. What's the difference between battery sizes?
Hearing aid batteries come in four colour-coded sizes: yellow (10), brown (312), orange (13), and blue (675). Smaller hearing aids use size 10, whilst larger Behind-the-Ear models typically need size 13 or 675.
3. Are rechargeable hearing aids better than disposable batteries?
Rechargeable hearing aids eliminate the hassle of changing tiny batteries and provide 16-24 hours of power per charge. They're ideal for elderly users or those with dexterity issues, though disposable batteries offer quick swaps when away from power sources.
4. How do I know when my hearing aid batteries need changing?
Your hearing aids will usually beep or give voice alerts when batteries are low. You might also notice reduced volume, distorted sound, or intermittent cutting out before they die completely.
5. How should I store spare hearing aid batteries?
Store batteries at room temperature in a dry place, away from coins or metal objects. Don't keep them in the fridge—despite old myths, this actually reduces their effectiveness and lifespan.
