---
title: "SR626SW equivalent: 377, 376, SR66"
description: "The SR626SW is a 1.55 V silver oxide cell, also sold as 377, 376, SR66. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/sr626sw/
site: "At One Place"
---

# SR626SW battery

**What replaces a SR626SW: 377, 376, SR66, SR626, SR626W, AG4**

1.55 V silver oxide, 6.8 × 2.6 mm (diameter × height)

The SR626SW 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:** SR626SW
- **ANSI / NEDA:** 1176SO
- **Nominal voltage:** 1.55 V
- **Chemistry:** Silver oxide
- **Size:** 6.8 × 2.6 mm (diameter × height)
- **Typical capacity:** 27 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? |
| --- | --- |
| 377 | Yes — same cell |
| 376 | Yes — same cell |
| SR66 | Yes — same cell |
| SR626 | Yes — same cell |
| SR626W | Yes — same cell |
| AG4 | Yes — same cell |
| D377 | Yes — same cell |
| V377 | Yes — same cell |
| 626SW | Yes — same cell |
| 1176SO | Yes — same cell |
| GP377 | Yes — same cell |
| SB-AW | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| LR626 / LR66 / 177 | The alkaline cell in the same 6.8 × 2.6 mm can. It is 1.5 V with a sloping discharge and roughly half the capacity, so a quartz watch runs it flat far sooner and the hands may slow before it dies. It also leaks more readily, and a leaking cell inside a watch movement is an expensive repair. |
| SR621SW / 364 | Same 6.8 mm diameter, only 2.1 mm tall. It rattles in a 377 compartment and often loses contact when the watch is knocked. |

> The SR626SW 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

- Standard analogue quartz wristwatches
- Timex, Casio, Fossil and Seiko three-hand movements
- Small LED keyring torches
- Digital tyre gauges

> The most common wristwatch cell in the world. 377 is the high-drain version and 376 the low-drain one; they share a can and either will run a watch.

## Common questions

### What is equivalent to a SR626SW?

377, 376, SR66, SR626, SR626W, AG4, D377, V377, 626SW, 1176SO, GP377, SB-AW — all the same 1.55 V cell under different manufacturer codes.

### Can I use a LR626 / LR66 / 177 instead of a SR626SW?

The alkaline cell in the same 6.8 × 2.6 mm can. It is 1.5 V with a sloping discharge and roughly half the capacity, so a quartz watch runs it flat far sooner and the hands may slow before it dies. It also leaks more readily, and a leaking cell inside a watch movement is an expensive repair.

### Is the SR626SW 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/)
- [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/)
- [SR1130 battery](https://atoneplace.net/battery/sr1130/)

## Sources

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