Quick answer: A cochlear implant battery should be chosen by sound processor model first, not by colour tab alone. Many disposable cochlear implant processors use size 675 or 675P implant batteries, but compatibility matters. For HearNZ customers, the safest starting points are our cochlear 675 battery collection, our Zenipower cochlear implant size 675P batteries, and our wider hearing aid batteries range for everyday hearing devices in the home.

Key takeaways

• Check the exact sound processor model before buying any cochlear implant battery.
• Do not assume every blue size 675 battery is right for an implant processor.
• Keep spare batteries in a small, labelled case so work, travel and appointments are easier.
• Store all button batteries away from tamariki and dispose of used batteries safely.

Who this guide is for

This guide is for cochlear implant users, partners, adult children and caregivers in New Zealand who help manage battery orders. We know a battery order often happens when someone is already low on spares, so we keep the process practical: check the processor, choose the right size, order enough for the month, and keep a few backups in the right places.

It is also useful if your whānau orders both cochlear implant batteries and standard hearing aid batteries. Some homes need implant 675P batteries for one person and standard hearing aid batteries for another. HearNZ can help you keep those orders simple with size 675 hearing aid batteries, size 312 hearing aid batteries, size 13 hearing aid batteries, and size 10 hearing aid batteries all in one place.

Start with compatibility, not colour alone

Most battery mix-ups happen when someone buys by colour tab without checking the processor instructions. Blue usually points to size 675, but a cochlear implant processor may need an implant-labelled 675P option rather than a standard hearing aid battery. The right battery depends on the sound processor, the battery frame or holder, and the manufacturer guidance from your clinic or device manual.

Step 1: check the processor name

Look for the model name on the processor, battery pack, user manual, app, storage case or clinic paperwork. If you are ordering for a parent, take a clear photo of the processor and the old battery packet. Keep that photo in your phone so reordering is easier next time.

Step 2: match the size and battery type

If the processor uses disposable implant batteries, confirm whether it needs size 675, 675P or another model-specific option. For many New Zealand shoppers, our cochlear 675 collection is the most relevant implant battery area. If the old packet says implant plus, cochlear implant or 675P, start by checking Zenipower cochlear implant size 675P.

Step 3: keep standard hearing aid batteries separate

Standard hearing aid batteries are still essential for many households, but they should not be mixed into the cochlear implant battery case unless the clinic has confirmed they are suitable. We recommend keeping a separate labelled tray for implant batteries and another for regular hearing aid batteries, such as Power One size 675, Rayovac size 675, and Zenipower size 675.

How HearNZ helps you shop hearing aid batteries with less fuss

We stock hearing aid batteries so you can order the right size without visiting multiple stores. If you are not buying for a cochlear implant processor, start with the hearing aid size printed on the existing packet or shown by the colour tab. You can browse the full shop hearing aid batteries collection, or go straight to a size collection.

• Size 10 hearing aid batteries for many small in-ear hearing aids.
• Size 13 hearing aid batteries for many behind-the-ear and receiver-in-canal devices.
• Size 312 hearing aid batteries for common compact devices.
• Size 675 hearing aid batteries for selected higher-power hearing aids, noting that implant processors may still need implant-specific 675P.

For customers who like to compare brands before committing, our compare pack collection makes testing easier. The size 675 compare pack is useful when you have a standard size 675 hearing aid and want to compare everyday performance across Power One, Rayovac and Zenipower options.

A simple reorder system for caregivers

Caregivers often manage batteries alongside appointments, transport, medication, groceries and family admin. A small reorder system can prevent last-minute stress.

1. Write the correct battery type on a sticky label, such as cochlear implant 675P or hearing aid 312.
2. Keep one unopened packet as the reorder trigger.
3. Store a small spare set in a daily bag, work bag or appointment folder.
4. Take a photo of the correct product page, such as Zenipower cochlear implant size 675P, so the next order is quick.
5. Keep regular hearing aid products separate, such as Power One size 312, Rayovac size 312, and Zenipower size 312.

Travel and spare battery support

When travelling, pack more spare batteries than you expect to use. Sound processor battery life can vary with processor model, listening environment, wireless streaming, programme settings and daily wear time. We recommend carrying spares in original packaging or a protective battery case, not loose in a pocket with coins or keys.

For flights, check the latest airline and aviation rules before you leave. New Zealand aviation guidance says spare or loose batteries should travel in carry-on luggage rather than checked luggage, and battery terminals or packaging should be protected. Because airline rules can change, confirm the current requirement with your airline before travel.

Storage and safety at home

Cochlear implant batteries and hearing aid batteries are small button batteries. Store new and used batteries away from children, pets and anyone who may put small items in their mouth. Keep batteries in their original packaging until use, avoid moisture and heat, and put used batteries somewhere secure until disposal.

If a child may have swallowed or inserted a button battery, treat it as urgent and seek emergency help. Do not wait for symptoms. For everyday prevention, keep battery drawers closed, avoid loose batteries on bedside tables, and check bags after appointments or travel.

Troubleshooting when battery life feels too short

Short battery life does not always mean the battery is faulty. It can happen when the sound processor is streaming more often, working harder in noise, using a different programme, or when the battery pack contacts need cleaning. Moisture can also affect performance, especially after humid days, exercise or rain.

Try these simple checks:

• Confirm the battery is the exact size and type recommended for your processor.
• Check the positive and negative orientation before closing the battery compartment.
• Let zinc-air batteries breathe briefly after removing the tab before fitting them.
• Use a fresh packet if the current packet has been open for a long time.
• Ask your hearing clinic or implant team if the processor continues to drain batteries quickly.

When to contact your clinic or implant team

Contact your clinic or implant team if the processor stops working, battery doors are damaged, alerts change, sound is intermittent, or battery life suddenly drops without an obvious reason. We can help with product selection and reordering, but your clinic is the right place for device checks, programming concerns and clinical advice.

FAQs

What is the right cochlear implant battery size to buy?

The safe starting point is your sound processor model. Many disposable cochlear implant processors use size 675 or 675P implant batteries, but you should match the exact processor instructions before ordering.

Are cochlear implant batteries the same as hearing aid batteries?

Not always. Some look like standard size 675 hearing aid batteries, but implant processors can have higher power needs. We recommend choosing implant-labelled 675P batteries when your processor manual or clinic specifies them.

Can I carry spare batteries on flights and in checked luggage?

Check your airline before travel. In New Zealand, aviation guidance says spare or loose batteries should travel in carry-on, not checked luggage, and terminals or packaging should be protected.

How many spare cochlear implant batteries should I keep?

We suggest keeping at least a few days of spare batteries at home, plus a small carry case for work, school, appointments or travel. Your actual use depends on processor model, settings and listening time.

How should I store cochlear implant and hearing aid batteries?

Store them in their original packaging, at room temperature, away from moisture, heat and children. Keep used button batteries secure until disposal because they can still be dangerous if swallowed.

Where can I buy cochlear implant battery options in NZ?

You can shop HearNZ cochlear 675 options and our wider hearing aid batteries range online. Always confirm the battery size and processor compatibility before you reorder.

Next steps

• Shop cochlear 675 batteries
• View Zenipower cochlear implant size 675P
• Shop all hearing aid batteries
• Browse size 675 hearing aid batteries
• Compare size 675 battery brands
• Read our cochlear implant batteries 675 NZ guide
• Read the cochlear implant batteries NZ hub

References

• Disability Support Services: Cochlear implants
• New Zealand Audiological Society: Cochlear implants
• NIDCD: Cochlear implants fact sheet
• Civil Aviation Authority of New Zealand: Travelling with batteries
• Product Safety New Zealand: Button batteries
• Cochlear Store NZ: PowerOne IMPLANT Plus Battery size 675