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Hearing aid battery sizes
Disposable hearing aid cells are usually zinc-air with colour-coded sizes (10, 312, 13, 675). Match the number on the empty pack — Rayovac, Duracell, Power One and other brands use the same size codes. OEM size tables (e.g. Phonak non-rechargeable model → size; Widex colour legend) confirm the same four retail sizes. This chart is not for sealed rechargeable hearing-aid systems and is not clinical advice.
Important
Hearing aids are medical devices. Use only the size and type your audiologist or manufacturer specifies. Zinc-air size codes do not fit every aid, and they are not substitutes for sealed rechargeable systems. Keep button and zinc-air cells away from children and pets; swallowed cells are a medical emergency. This chart is a size guide — not a fitting or clinical recommendation.
Size chart
| Retail size | Also called | Tab colour | Approx. size | Notes |
|---|---|---|---|---|
| 10 | PR70 / ZA10 | Yellow | ~5.8 mm | Smallest common disposable size (Phonak Virto size-10 class examples). |
| 312 | PR41 / ZA312 | Brown | ~7.9 mm | Very common RIC / small BTE size (Phonak Audéo / Bolero / Terra 312-class examples). |
| 13 | PR48 / ZA13 | Orange | ~7.9 × taller | Common BTE / larger aid size (Phonak Audéo 13T / Naída SP-class examples). |
| 675 | PR44 / ZA675 | Blue | ~11.6 mm | Larger power / UP-class packs (Phonak Naída / Sky / Terra UP-class examples). |
Power types
| Generation / model | Battery | Replaceable? | Notes |
|---|---|---|---|
| Zinc-air disposable (tabbed) | Size 10 / 312 / 13 / 675 — match pack | Yes | Only if your aid has a zinc-air tray. Peel the tab when ready, wait ~1 minute for air activation, then insert. Sizes and chemistries are not interchangeable. |
| Phonak non-rechargeable size table (OEM) | Model → 10 / 312 / 13 / 675 per Phonak | Yes | Phonak’s battery-types knowledge base maps many Audéo, Bolero, Naída, Sky, Virto and Terra non-rechargeable models to zinc-air sizes with IEC codes PR70 / PR41 / PR48 / PR44. Use that table or your empty pack — we do not invent a clinical fit from brand alone. |
| Widex colour / size legend (OEM) | 10 yellow · 312 brown · 13 orange · 675 blue | Yes | Widex documents the same four zinc-air retail sizes and tab colours for non-rechargeable devices. Check the device instructions for which colour your model needs. |
| Rechargeable hearing-aid systems | Built-in pack — not ZA10/312/13/675 | No | Sealed rechargeable aids are a different power system. This size chart does not apply — do not force zinc-air cells into a rechargeable aid or charger case. |
Matching devices
Still not working?
If fresh zinc-air cells of the correct size fail quickly, ask your audiologist about contacts, moisture, and whether your aid is actually a rechargeable model (in which case this chart does not apply).