Maxell SR920W (370) 1.55V Silver Oxide Watch Battery – Pack of 1

## Maxell SR920W (370) 1.55V Silver Oxide Watch Battery – Pack of 1

Maxell SR920W is a genuine 1.55V silver oxide button cell, commonly cross-referenced under the code 370. It is manufactured by Maxell and is designed for simple analog watch movements; it is generally supplied as the low-drain version of the 920 size, so it suits watches without chronograph or backlight functions. This listing is for 1 x SR920W battery only.

This product is made for customers who want a reliable, correctly specified replacement battery for their existing watch, without guesswork over voltage or chemistry. It ships sealed to protect the contacts until you’re ready to fit it.

### Product Specifications

| **Brand** | Maxell |
| — | — |
| **Battery Type / Model** | SR920W |
| **Cross Reference Code(s)** | 370 |
| **Chemistry** | Silver Oxide |
| **Voltage** | 1.55V |
| **Pack Quantity** | 1 battery |
| **Condition** | New, sealed |
| **Recommended Use** | Simple analog watch movements; it is generally supplied as the low-drain version of the 920 size, so it suits watches without chronograph or backlight functions |

### Key Features

– Genuine Maxell silver oxide cell, not a generic unbranded substitute
– Stable 1.55V output for accurate, consistent watch timekeeping
– Cross-referenced against 370 for easy identification
– Supplied sealed to protect contacts during storage and transit
– Available in a 1-battery pack to suit single replacements or bulk servicing needs

### Benefits

Fitting the correct battery chemistry and voltage matters more than people often expect: an incorrect substitute can run a watch fast, slow, or shorten the life of the movement. The SR920W is matched to the 370 specification so your watch keeps time the way its manufacturer intended. Silver oxide cells hold their voltage close to 1.55V for most of their working life before dropping off relatively quickly near the end, which is why watches tend to keep accurate time right up until the battery needs replacing, rather than slowly losing accuracy.

### How to Confirm Fit

Watch batteries of the same physical size are sometimes sold under different code names by different manufacturers, since there’s no single universal numbering system across the industry. Before ordering, check the code stamped on your existing battery or printed inside your watch’s battery hatch, and match it against 370. If your old battery shows a different code, compare the physical diameter and thickness against the SR920W rather than relying on the code name alone.

### Fitting Guidance & Safety

Many watches with a screw-off or snap-off case back can be opened at home with a small case-back tool, but we’d suggest a jeweller or watch specialist if you’re not confident, especially on water-resistant models, since disturbing the seal can affect water resistance until it’s re-tested. Handle button cells by the edges, avoid letting metal tools touch both terminals at once, and keep spare cells away from children and pets, as they are a swallowing hazard.

### Important Information

This listing covers the battery only; it does not include a watch, tool kit, or case-back opener. For chronographs, smartwatch hybrids, or any watch with additional electronic functions, please confirm with your watch’s manual that the SR920W is the correct specification for that movement, as some multi-function watches are calibrated for a specific drain rate.

### FAQ

**Is this a genuine Maxell battery?**
Yes, this is a genuine Maxell SR920W, not a generic or unbranded substitute.

**How do I check this is the right size for my watch?**
Match the code on your old battery, or the code printed inside your watch’s battery hatch, against 370.

**How many batteries are included?**
This listing includes 1 x SR920W battery.

**Does this come with fitting tools?**
No, this listing is for the battery cell only.

If you’re unsure which size your watch needs, get in touch with our team before ordering — we’re happy to help you cross-reference the correct battery code.