---
title: "SR41 equivalent: 392, 384, SR736"
description: "The SR41 is a 1.55 V silver oxide cell, also sold as 392, 384, SR736. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/sr41/
site: "At One Place"
---

# SR41 battery

**What replaces a SR41: 392, 384, SR736, SR41W, SR41SW, D392**

1.55 V silver oxide, 7.9 × 3.6 mm (diameter × height)

The SR41 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:** SR41
- **ANSI / NEDA:** 1135SO
- **Nominal voltage:** 1.55 V
- **Chemistry:** Silver oxide
- **Size:** 7.9 × 3.6 mm (diameter × height)
- **Typical capacity:** 41 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? |
| --- | --- |
| 392 | Yes — same cell |
| 384 | Yes — same cell |
| SR736 | Yes — same cell |
| SR41W | Yes — same cell |
| SR41SW | Yes — same cell |
| D392 | Yes — same cell |
| V392 | Yes — same cell |
| 1135SO | Yes — same cell |
| SB-B1 | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| LR41 / 192 / AG3 | Alkaline in the same 7.9 × 3.6 mm can, 1.5 V and 45 mAh with a sloping curve. It works in a toy or a penlight; it does not hold a stable voltage for a meter. |
| SR754 / 393 | Same diameter, 5.4 mm tall. Nearly twice the height. |

> The SR41 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

- Digital thermometers
- Small quartz watch movements
- Otoscopes and penlights
- Electronic pill timers

## Common questions

### What is equivalent to a SR41?

392, 384, SR736, SR41W, SR41SW, D392, V392, 1135SO, SB-B1 — all the same 1.55 V cell under different manufacturer codes.

### Can I use a LR41 / 192 / AG3 instead of a SR41?

Alkaline in the same 7.9 × 3.6 mm can, 1.5 V and 45 mAh with a sloping curve. It works in a toy or a penlight; it does not hold a stable voltage for a meter.

### Is the SR41 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/)