Hearing aids and batteries work together, so getting the right size, storing batteries properly, and replacing them at the right time can help your device stay reliable day to day. For most New Zealand users, the simplest approach is to check the colour tab or size number on your current battery pack, then shop by that exact size before you run low.
Why batteries matter for hearing aids
Hearing aids depend on a steady power supply to perform well. When the battery is the wrong size, old, or poorly stored, you may notice shorter run time, weak sound, or interruptions during the day. We recommend starting with the basics: confirm the size, keep spare batteries on hand, and replace them before you are caught out.
If you are ready to reorder, our hearing aid batteries collection makes it easier to shop by the battery type you already use. If you also want everyday care items, you can browse our cleaning and maintenance range in the same visit.
How to check the right battery size
Most disposable hearing aid batteries are zinc-air batteries and are usually identified by both a number and a colour tab. The common sizes are 10, 13, 312, and 675. Your hearing aid manual, current battery pack, or clinic paperwork may list the correct size.
- Size 10 often uses a yellow tab
- Size 13 often uses an orange tab
- Size 312 often uses a brown tab
- Size 675 often uses a blue tab
If you are unsure, do not guess. Matching the exact size matters because the battery must fit the compartment correctly. Our guide on how to choose the right battery size for your hearing aid can help you double-check before ordering.
When to replace hearing aid batteries
Battery life varies by device type, usage time, streaming features, and battery size. Some users notice a low-battery warning tone, while others may first spot reduced volume or performance. A good rule is to replace the battery as soon as you notice consistent low-power signs, rather than waiting until your hearing aid stops unexpectedly.
We also suggest keeping one unopened pack at home so you are not without power when you need it most. This can be especially helpful for regular users, carers, and families ordering for someone else.
Simple habits that can help
- Store batteries in a cool, dry place
- Keep them in the original pack until use
- Check the expiry date before buying in bulk
- Open the battery door on your hearing aid when the device is not in use, if your manufacturer recommends it
- Keep spare batteries away from children and pets
Common reasons batteries seem to run out too fast
Short battery life does not always mean there is something wrong with the battery itself. Hearing aid power use can change depending on streaming, Bluetooth features, device settings, humidity, and daily wear time. In some cases, moisture or wax build-up may also affect how the device performs.
If you are replacing batteries more often than expected, it may be worth reviewing your routine. Check that the battery size is correct, the pack is within date, and the hearing aid is clean and dry. You may also benefit from adding a simple care item such as a drying kit or wax guards to your routine.
Buying batteries in NZ with more confidence
For most people, the easiest way to buy with confidence is to reorder the same size and brand that already works well in their device. If you want to compare options, we stock leading battery choices and size-based collections so you can narrow things down faster.
Many New Zealand shoppers also prefer to stock up on a few packs at once. That can reduce last-minute stress and make reordering easier, especially if you live rurally or buy for a parent or partner.
What to do if you are not sure which battery you need
Start with the battery currently in your hearing aid or the packet you last used. Look for the size number and tab colour. If you still are not sure, check the hearing aid manual or contact your hearing clinic. We always recommend matching the exact battery size your device is designed for.
You can also start with our hearing aid batteries NZ guide if you want a broader overview before choosing a product.
FAQs
How do I know which hearing aid battery size I need?
Check your current battery packet, hearing aid manual, or the label from your clinic. Most devices use size 10, 13, 312, or 675, and the tab colour usually helps confirm the match.
How long do hearing aid batteries usually last?
Battery life depends on the device, battery size, daily wear time, and features such as streaming. A practical approach is to keep spare batteries on hand and replace them when low-power signs become consistent.
Why do my hearing aid batteries seem to run out quickly?
Faster battery drain can happen because of long daily use, streaming features, moisture, storage conditions, or using an older pack. It is also worth checking that the hearing aid is clean and the battery size is correct.
Can I buy hearing aid batteries online in NZ?
Yes. Buying online can make reordering easier, especially when you already know your battery size. We suggest checking the size number and tab colour before placing your order.
