Quick answer: Most hearing devices use zinc-air button batteries (sizes 10, 13, 312, or 675). To buy the right one, match the size number (or colour code) from your old pack, let a new battery “breathe” for a minute after removing the tab, and store spares cool and dry. If your device suddenly cuts out, check the battery tab, orientation, and battery door first.
If you are searching for batteries for hearing devices in New Zealand, you are probably trying to do one of three things: choose the right size, stop your batteries draining too fast, or fix a device that will not power on. We walk through all three below with practical, day-to-day guidance.
For quick shopping, start here: Shop hearing aid batteries. If you already know your size, a popular option is Zenipower batteries size 312.
What type of batteries do hearing devices use?
Most hearing aids and many hearing devices use zinc-air button batteries. These batteries activate when you remove the sticky tab and air enters small holes in the battery. That design supports steady power, but it also means handling and storage affects how long they last.
Some rechargeable hearing aids use built-in lithium-ion batteries instead of replaceable button cells. If your device charges in a dock and does not have a battery door, you likely do not need disposable batteries. In that case, focus on charger care and check-ups with your hearing provider.
Hearing aid battery sizes and colour codes
The most common disposable sizes are:
- Size 10 (often yellow)
- Size 13 (often orange)
- Size 312 (often brown)
- Size 675 (often blue)
The simplest way to confirm your size is to look at the number printed on your current battery pack or on the battery itself. If you want a step-by-step method, see: How to choose the right battery size for your hearing aid.
How long do hearing device batteries last?
Battery life depends on device type and use. Streaming audio, higher volume, and features like noise processing can shorten battery life. Your best benchmark is your real routine: note how many days you get from a pack, then compare across brands or sizes.
As a general guide, smaller batteries (like size 10) often need replacing more frequently than larger ones (like size 675). If you need help matching a device to the right battery supply, our overview page is a helpful starting point: Hearing aid batteries in NZ.
How to change a hearing device battery
- Wash and dry your hands.
- Open the battery door and remove the old battery.
- Remove the sticky tab from the new battery.
- Wait 1 to 2 minutes to let the battery activate with air.
- Insert the battery with the correct side facing up (match the “+” marking).
- Close the battery door gently. Do not force it.
If you are unsure about the battery orientation, check your device manual or ask your hearing clinic. For some people, a tester can reduce guesswork when a device acts flat. Example: Rayovac hearing aid battery tester.
Tips to make hearing device batteries last longer
- Let the battery breathe: after removing the tab, wait a minute before inserting it.
- Keep spares dry: moisture can shorten life. Store batteries in their original pack until needed.
- Avoid extreme heat: do not leave batteries in a hot car or in direct sun.
- Open the battery door at night: for many devices, this can reduce drain and helps moisture evaporate.
- Turn off streaming when not needed: Bluetooth streaming can use more power.
Signs your hearing device battery is running low
Low-battery signs vary by brand, but common clues include:
- warning beeps or spoken alerts
- sound that becomes weaker, distorted, or intermittent
- needing higher volume than normal
- device shutting off unexpectedly
If you are noticing fast drain, it can help to rule out moisture and dirty contacts. Our cleaning range is here: Cleaning and maintenance.
Troubleshooting: my hearing device is not working after changing the battery
1) Check the sticky tab is fully removed
If part of the tab remains, air cannot activate the battery properly and the device may not power on.
2) Confirm the battery is inserted the right way
Most battery doors have a “+” marking. If the battery is upside down, the door may close but the device will not work.
3) Make sure the battery door is fully closed
Close gently and do not force it. If the door will not close, the battery may be the wrong size.
4) Inspect for moisture or debris
Moisture and wax can affect contacts. If you see build-up, follow your cleaning instructions or ask your clinic for help. If you use a drying box or dehumidifier, use it consistently.
5) Try a second new battery
Occasionally a battery can be faulty or old stock. Trying another new battery can quickly confirm if the issue is the cell or the device.
Safe storage and disposal in NZ
Button batteries are a serious swallowing hazard for children and pets. Store them up high, in the original packaging, and out of reach. For disposal, do not leave used batteries loose in a drawer. Many areas have battery recycling options, so check your local council or a battery recycling drop-off point.
FAQs
What batteries do hearing devices use in NZ?
Many hearing aids and hearing devices use zinc-air button batteries, most commonly sizes 10, 13, 312, or 675. Some modern hearing aids are rechargeable and do not use replaceable button batteries.
How do I know what size hearing aid battery I need?
Check the number on your current battery pack or the battery itself. If you are unsure, your hearing clinic can confirm your size. Our guide on choosing the right battery size can also help.
Why do zinc-air hearing aid batteries have tabs?
The tab seals tiny air holes. When you remove it, air enters and activates the battery chemistry. Waiting 1 to 2 minutes after removing the tab can help the battery reach stable output.
How long should hearing aid batteries last?
It depends on your device and how you use it. Streaming audio, higher volume, and advanced features can reduce battery life. Tracking how many days you get per battery is the most practical way to estimate your personal usage.
What should I do if my hearing device will not turn on after a battery change?
Recheck that the tab is fully removed, the battery is the correct size and orientation, and the door is fully closed. If it still will not power on, try a second new battery and check for moisture or debris in the battery compartment.
Can I take hearing aid batteries on a plane?
In most cases, spare button batteries can be carried in hand luggage if they are in original packaging or protected so they cannot short-circuit. Airline rules vary, so check your carrier’s current guidance before flying.
Next steps
- Shop hearing aid batteries
- Hearing aid batteries in NZ
- Battery tester for quick checks
- Hearing aid battery prices in NZ
- How long does a size 10 hearing aid battery last?
- Best hearing aid battery tester
