---
title: "PR44 equivalent: ZA675, A675, AC675"
description: "The PR44 is a 1.4 V zinc-air cell, also sold as ZA675, A675, AC675. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/za675/
site: "At One Place"
---

# PR44 battery

**What replaces a PR44: ZA675, A675, AC675, DA675, P675, 675A**

1.4 V zinc-air, 11.6 × 5.4 mm (diameter × height)

The PR44 is a single-use 1.4 V zinc-air button cell. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

## Specification

- **IEC designation:** PR44
- **ANSI / NEDA:** 7003ZD
- **Nominal voltage:** 1.4 V
- **Chemistry:** Zinc-air
- **Size:** 11.6 × 5.4 mm (diameter × height)
- **Typical capacity:** 575 mAh
- **Rechargeable:** No — never charge it

## Codes that mean the same battery

*Different manufacturers, one physical battery. Voltage, chemistry and dimensions all match.*

| Code | Fits? |
| --- | --- |
| ZA675 | Yes — same cell |
| A675 | Yes — same cell |
| AC675 | Yes — same cell |
| DA675 | Yes — same cell |
| P675 | Yes — same cell |
| 675A | Yes — same cell |
| S675 | Yes — same cell |
| V675 | Yes — same cell |
| 7003ZD | Yes — same cell |
| PR44 | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| LR44 / SR44 | The same 11.6 × 5.4 mm can as the most common button cell in the world, which makes this the most dangerous size confusion in hearing aids. The zinc-air cell is 1.4 V and needs air; the alkaline and silver oxide cells are sealed 1.5 and 1.55 V cells. A hearing aid fitted with an LR44 runs at the wrong voltage, and a PR44 fitted to a caliper dies within days. |
| 675P / cochlear implant cells | Implant processors use a high-power variant of the same size, sometimes marked 675P or "implant plus". A standard 675 fits and will not deliver the current the processor needs. |

> The PR44 is a primary cell and must never be put in a charger. Charging a sealed primary battery builds gas pressure inside a can with no vent designed for it, which is how they rupture or catch fire. Rechargeable look-alikes exist for several sizes and carry different codes — check the code, not the shape.

## Where it turns up

- Power behind-the-ear hearing aids
- Cochlear implant sound processors
- Body-worn hearing instruments
- Some assistive listening receivers

> Blue tab. The largest hearing aid cell, nine to twenty days typical, and by far the highest capacity of any 11.6 × 5.4 mm button cell — because most of the cathode is the air outside it.

## Common questions

### What is equivalent to a PR44?

ZA675, A675, AC675, DA675, P675, 675A, S675, V675, 7003ZD, PR44 — all the same 1.4 V cell under different manufacturer codes.

### Can I use a LR44 / SR44 instead of a PR44?

The same 11.6 × 5.4 mm can as the most common button cell in the world, which makes this the most dangerous size confusion in hearing aids. The zinc-air cell is 1.4 V and needs air; the alkaline and silver oxide cells are sealed 1.5 and 1.55 V cells. A hearing aid fitted with an LR44 runs at the wrong voltage, and a PR44 fitted to a caliper dies within days.

### Is the PR44 rechargeable?

No. It is a primary cell — charging one risks rupture or fire. Rechargeable look-alikes exist in the same size under different codes.

## Related pages

- [LR44 battery](https://atoneplace.net/battery/lr44/)
- [SR626SW battery](https://atoneplace.net/battery/sr626sw/)
- [SR44 battery](https://atoneplace.net/battery/sr44/)
- [PR41 battery](https://atoneplace.net/battery/za312/)
- [PR48 battery](https://atoneplace.net/battery/za13/)
- [SR621SW battery](https://atoneplace.net/battery/sr621sw/)
- [SR920SW battery](https://atoneplace.net/battery/sr920sw/)
- [LR41 battery](https://atoneplace.net/battery/lr41/)
- [PR70 battery](https://atoneplace.net/battery/za10/)
- [SR927SW battery](https://atoneplace.net/battery/sr927sw/)
- [LR1130 battery](https://atoneplace.net/battery/lr1130/)
- [SR1130 battery](https://atoneplace.net/battery/sr1130/)

## Sources

- Official vendor product documentation — At One Place (/about/)