Quick answer: Most hearing aids in NZ use zinc-air disposable batteries (sizes 10, 13, 312, 675) or a built-in rechargeable lithium-ion battery. To get the right battery of hearing aid, match the size number your device uses, store spares cool and dry, and expect typical runtime from a few days to around two weeks depending on size, streaming, and wear time. If you are unsure, bring your hearing aid to us and we will help you match the correct option.
If you are shopping for a battery of hearing aid and want a simple, NZ-friendly guide, you are in the right place. We see a lot of confusion around sizes (like 13 vs 312), how long batteries should last, and why a fresh battery sometimes seems flat. Below, we break it down in plain language, plus what to do when your hearing aid keeps beeping or cutting out.
To browse compatible options, start with our hearing aid batteries collection. If your device takes size 13, our Zenipower size 13 batteries are a common match for many behind-the-ear models.
What is a hearing aid battery
A hearing aid battery powers the microphones, amplifier, and speaker in your hearing aid. There are two main types:
- Disposable zinc-air batteries (sizes 10, 13, 312, 675). These use air to activate, which is why they come with a sticky tab.
- Rechargeable batteries (usually lithium-ion) built into the hearing aid, charged in a dock or case.
Your hearing aid manual, battery door markings, or your previous packet usually confirms the battery type and size. If you cannot find it, we recommend bringing the device in so we can identify it correctly.
Disposable zinc-air hearing aid batteries
Common battery sizes: 10, 13, 312, 675
Zinc-air batteries are labelled by number and often colour-coded by manufacturers. The number matters most. Here is the practical difference:
- Size 10: often used in smaller in-ear styles. Typically shorter life due to smaller capacity.
- Size 312: very common across many modern hearing aids.
- Size 13: often used in behind-the-ear models, usually longer life than 312.
- Size 675: often used in high-power devices and some cochlear implant processors, usually the longest life among disposables.
How zinc-air batteries work
Zinc-air batteries activate when you remove the tab and air enters through tiny holes. That is why correct handling matters. If you remove the tab and do not use the battery for a while, it can still slowly drain.
Rechargeable hearing aid batteries
Rechargeable hearing aids remove the need to swap disposable batteries. Instead, you charge overnight (or as needed) using the manufacturer charger. Rechargeables can be very convenient, but battery runtime still depends on:
- How many hours per day you wear the aids
- Streaming (calls, music, TV) and Bluetooth use
- Power level and amplification needs
- Device age and battery health
If your rechargeable battery no longer lasts through the day, it may need a professional battery replacement (model dependent). We can advise based on your hearing aid make and model.
How to choose the right battery of hearing aid
Step 1: Confirm the battery size or battery system
For disposable models, check the size number on the packet, the battery door, or your hearing aid user guide. If you want a size-by-size explanation, see how to choose the right battery size for your hearing aid.
Step 2: Consider your usage
If you stream audio daily or wear your hearing aids from morning to night, you will generally use more power. In that case, you may prefer a larger disposable size (if your device supports it) or a rechargeable model with strong all-day capacity.
Step 3: Buy from a trusted source
Hearing aid batteries are small but sensitive. We recommend buying from a reputable supplier so stock is stored properly and rotated. For NZ delivery options, visit our shop hearing aid batteries range.
How long does a hearing aid battery last
Battery life varies widely. As a rough guide, smaller sizes tend to last fewer days and larger sizes tend to last more days. But real-world results depend on your hearing aid settings, hearing loss level, humidity, and streaming.
Things that commonly shorten battery life include heavy Bluetooth streaming, high amplification requirements, and leaving the battery door closed when the hearing aid is not in use.
How to store hearing aid batteries properly
- Store cool and dry: a cupboard is better than a bathroom.
- Keep them in the original pack until you are ready to use them.
- Avoid loose batteries in pockets or bags where they can contact coins or keys.
- Do not refrigerate unless a manufacturer specifically tells you to. Condensation can cause issues.
How to change a hearing aid battery
- Open the battery door fully and remove the old battery.
- Check the new battery is the correct size number.
- Remove the tab and wait about 1 to 2 minutes before inserting (this can help zinc-air activate).
- Insert with the correct polarity (usually plus side up).
- Close the door gently and confirm the hearing aid powers on.
Troubleshooting: beeping, cutting out, or short battery life
My hearing aid keeps beeping
Beeping can indicate a low battery, a moisture issue, or a maintenance need (like wax blockage). Try a fresh battery first. If it continues, clean the device following your user guide and consider a professional check.
A brand new battery seems flat
This can happen if the tab was removed too early, the battery contacted metal in a pocket, or the pack was exposed to heat or humidity. Try another new battery from the pack and store spares in a cool, dry place.
Battery drains faster when I stream
Streaming uses extra power. This is normal for both disposable and rechargeable models. If the change is sudden and dramatic, your device may need a settings review or servicing.
Battery safety and recycling in NZ
Keep hearing aid batteries away from children and pets. Button batteries can be dangerous if swallowed. For disposal, check local NZ council guidance and battery recycling services where available. If you are unsure, ask us and we will point you to appropriate local options.
FAQs
What is the most common battery of hearing aid in NZ
Disposable zinc-air batteries are the most common, especially sizes 312 and 13. Many newer hearing aids are also available with built-in rechargeable batteries.
How do I know if I need size 13 or 312
Check the size number on your current battery packet, the marking on the battery door, or your hearing aid manual. If you still cannot confirm, bring your hearing aid to us and we will match the correct size.
Should I wait after removing the tab on a zinc-air battery
Yes. Waiting about 1 to 2 minutes after removing the tab can help the battery fully activate before you insert it.
Why does my hearing aid battery run out so fast
Fast drain is often caused by heavy streaming, long daily wear time, high amplification needs, moisture exposure, or leaving the battery door closed when not in use. Trying a fresh pack and reviewing usage is a good first step.
Can I use any brand of hearing aid battery
You can usually use any reputable brand as long as the size number matches your hearing aid. If you are unsure about compatibility, we can recommend an option that suits your device.
Next steps
- Shop hearing aid batteries
- How to choose the right battery size for your hearing aid
- Hearing aid batteries in NZ: what to buy and where
- Hearing aid battery prices in NZ
- Ear aid battery: what it is and how to choose
