---
title: "SR754 equivalent: 393, 309, SR48"
description: "The SR754 is a 1.55 V silver oxide cell, also sold as 393, 309, SR48. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/sr754/
site: "At One Place"
---

# SR754 battery

**What replaces a SR754: 393, 309, SR48, SR754W, SR754SW, D393**

1.55 V silver oxide, 7.9 × 5.4 mm (diameter × height)

The SR754 is a single-use 1.55 V silver oxide button cell. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

## Specification

- **IEC designation:** SR754
- **ANSI / NEDA:** 1137SO
- **Nominal voltage:** 1.55 V
- **Chemistry:** Silver oxide
- **Size:** 7.9 × 5.4 mm (diameter × height)
- **Typical capacity:** 75 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? |
| --- | --- |
| 393 | Yes — same cell |
| 309 | Yes — same cell |
| SR48 | Yes — same cell |
| SR754W | Yes — same cell |
| SR754SW | Yes — same cell |
| D393 | Yes — same cell |
| V393 | Yes — same cell |
| 1137SO | Yes — same cell |
| SB-B4 | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| PR48 / size 13 hearing aid | Exactly the same 7.9 × 5.4 mm can, but zinc-air at 1.4 V that only works once air reaches it through the vent holes. It is not a watch cell and a watch cell is not a hearing aid cell. |
| LR754 / LR48 / 193 | Alkaline, 1.5 V, 53 mAh, sloping discharge. |

> The SR754 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

- Older quartz watches with deep movements
- Small medical instruments
- Electronic locks
- Digital tyre gauges

## Common questions

### What is equivalent to a SR754?

393, 309, SR48, SR754W, SR754SW, D393, V393, 1137SO, SB-B4 — all the same 1.55 V cell under different manufacturer codes.

### Can I use a PR48 / size 13 hearing aid instead of a SR754?

Exactly the same 7.9 × 5.4 mm can, but zinc-air at 1.4 V that only works once air reaches it through the vent holes. It is not a watch cell and a watch cell is not a hearing aid cell.

### Is the SR754 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/)
- [PR44 battery](https://atoneplace.net/battery/za675/)
- [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/)

## Sources

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