You may be holding an older battery packet marked PR41, A312, P13 or another code and wondering whether the replacement in your cart is really the same size. That concern is especially common when you are ordering for a parent, client or partner and cannot check the hearing aid yourself.
The direct decoder is simple: size 10 or PR70 is yellow, size 13 or PR48 is orange, size 312 or PR41 is brown, and size 675 or PR44 is blue. Codes such as A10, P13 and ZA312 are commonly used brand equivalents, but the printed size, existing packet, hearing-aid manual or device guidance should be your final check.
Start with the code you can see
Find the clearest code on the packet, card or battery tab, then use this hearing aid battery equivalent chart to translate it into a standard size and HearNZ shop route.
| Code on packet | Standard size | Tab colour | Other common labels | HearNZ shop route |
|---|---|---|---|---|
| PR70 | 10 | Yellow | A10, P10, ZA10, DA10, AC10 or AC230 | Shop size 10 batteries |
| PR48 | 13 | Orange | A13, P13, ZA13, DA13 and AC13 | Shop size 13 batteries |
| PR41 | 312 | Brown | A312, P312, ZA312, DA312 and AC312 | Shop size 312 batteries |
| PR44 | 675 | Blue | A675, P675, ZA675, DA675 and AC675 | Shop standard size 675 batteries |
Important: this matrix translates common zinc-air hearing aid battery codes. It does not confirm every device or processor. When the manual or manufacturer guidance names a particular battery type, follow that guidance.
Use colour as a second check, not the only proof
The industry colour system is useful because the four standard sizes are easy to recognise: yellow for 10, orange for 13, brown for 312 and blue for 675. Colour should support the printed code, not replace it.
If the code and colour disagree, pause before ordering. Check the existing packet, the hearing-aid manual, the battery compartment markings or advice from the hearing care provider. A battery that appears to fit is not enough proof of compatibility.
When you can see only a colour tab, use the HearNZ hearing aid battery size hub to narrow the options, then confirm the number before checkout. If neither a code nor colour is available, use our battery size checking guide as the fallback.
The blue-battery stop-check: 675 is not automatically 675P
Blue tabs need one extra check because both standard 675 hearing-aid batteries and 675P cochlear implant batteries may appear in blue packaging. The letter position matters too: P675 can appear as a common label for standard size 675, while 675P is used by HearNZ for an implant-power product route.
Standard hearing-aid 675
Typical decoder: 675, PR44, A675, P675, ZA675, DA675 or AC675.
Use this route only after confirmation: standard size 675 hearing-aid batteries.
Cochlear 675P
Typical clue: the packet or processor guidance specifically says 675P, implant power or cochlear implant.
Separate route: cochlear 675P batteries.
Do not treat standard 675 and 675P as interchangeable. Check the processor manual, manufacturer guidance or hearing care provider before ordering, especially when you are buying for somebody else.
The HearNZ Old-Packet Decoder: From Mystery Code to the Right NZ Shop Page
Here is the no-guessing sequence we use when an older packet is the only clue.
The packet says PR41
PR41 translates to standard size 312 and the matching tab colour is brown. Confirm that the old packet or device guidance also points to 312, then go to the HearNZ size 312 collection.
The packet says A13 or P13
A13 and P13 are common labels for standard size 13, which uses an orange tab. Check for 13, PR48 or orange on the old card, then use the HearNZ size 13 collection.
Only the tab colour is visible
Use yellow, orange, brown or blue to narrow the size, but do not order from colour alone. Open the HearNZ battery size hub, compare the likely size, then confirm it against the manual, old packet or device marking.
You are buying for a parent or client with no packet
Do not guess from the hearing aid shape or from a battery that seems to fit. Ask for a clear photo of the battery card, battery compartment or manual, use the step-by-step size check, and return to the main HearNZ battery collection only after the size is confirmed.
Shop by the size you have confirmed
Once the standard size is clear, use the matching route below. This keeps brand comparison separate from size selection, which is the safest order for a new hearing-aid user or caregiver.
Size 675
Decoder: PR44, A675, P675, ZA675, DA675 or AC675.
Colour: blue.
675P caution route: If the packet or processor guidance says 675P, implant power or cochlear implant, do not use the standard 675 route by default. Check the processor requirements first, then view the HearNZ cochlear 675P collection.
Small battery safety: Keep new and used button batteries out of reach of children and pets. If a button battery may have been swallowed or inserted, go to the nearest hospital emergency department immediately and follow current Product Safety New Zealand guidance.
Questions people ask when decoding hearing aid battery packets
What do PR70, PR48, PR41 and PR44 mean on hearing aid batteries?
They are IEC-style zinc-air battery codes linked to the standard hearing-aid sizes. PR70 means size 10, PR48 means size 13, PR41 means size 312 and PR44 means size 675.
Is PR41 the same as size 312?
Yes. PR41 is the standard code associated with size 312, which normally uses a brown tab. Confirm the old packet or device guidance before ordering.
Is PR48 the same as size 13?
Yes. PR48 maps to standard size 13 and the usual tab colour is orange.
Is PR70 the same as size 10?
Yes. PR70 maps to standard size 10 and the usual tab colour is yellow.
Is PR44 the same as size 675?
Yes. PR44 maps to standard size 675 and the usual tab colour is blue. A separate check is still needed when a packet says 675P or refers to a cochlear implant processor.
Are A312, P312 and PR41 equivalent?
They are common labels for standard size 312 batteries. Look for the matching brown tab and confirm the required size in the hearing-aid manual or existing packet.
Can I change battery brands when the standard size matches?
Usually, standard zinc-air hearing-aid batteries can be compared across brands once the same size and device requirements are confirmed. Do not rely on physical fit alone, and check manufacturer guidance for processors or specialised power requirements.
Are 675 and 675P the same battery?
No. HearNZ treats standard hearing-aid 675 and cochlear 675P as separate shopping routes. Check the processor manual, manufacturer guidance or hearing care provider before choosing either one.
What should I do if I only know the tab colour?
Use yellow, orange, brown or blue to narrow the likely size, then confirm the printed number from the old packet, device manual, battery compartment or hearing care provider before ordering.
References
- VARTA: standard hearing-aid battery size and PR code mapping
- Energizer New Zealand: industry colour-coded hearing-aid battery system
- Product Safety New Zealand: button battery safety guidance
Next steps
Start with the clearest code you have, confirm the matching standard size and colour, then choose the correct HearNZ collection. For blue batteries, complete the 675 versus 675P check before checkout.
