# Battery, Watch, Single Cell, 1.55 V, SR66, Silver Oxide, 28 mAh, Flat Top, 6.8 mm

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![Product image](https://novapart.co/image/farnell:2066070/)

**URL**: https://novapart.co/products/377/battery-watch-single-cell-155-v-sr66-silver-oxide
**SKU**: 377
**Manufacturer**: RENATA
**Category**: Batteries & Chargers || Batteries - Non-Rechargeable
**Price**: €0.4790
**Stock**: 1000+
**Lead Time**: 2 days (indicative)

## Description

The Renata 377 is a primary silver oxide (Zn/Ag2O) button cell battery designed for low-drain applications requiring a stable 1.55 V nominal output. Engineered to the SR66 (IEC SR626SW) standard, this cell provides a nominal capacity of 28 mAh when discharged at a constant load of 34.8 kΩ at 20°C. The chemistry is optimized for consistent voltage discharge profiles, making it suitable for precision timing circuits, analog and digital wristwatches, and compact medical devices where voltage stability is critical to operational accuracy.

Physically, the 377 features a flat-top terminal configuration with a diameter of 6.8 mm and a height of 2.66 mm, conforming to IEC 60086-3 dimensions. With a low self-discharge rate of less than 5% per year at 20°C and a total mass of approximately 0.4 g, this cell offers reliable long-term energy storage for low-power electronic systems. The battery is rated for an operating temperature range of 0°C to 60°C, ensuring performance across standard indoor and industrial environments.

## Specifications

| Parameter | Value |
|---|---|
| Weight | 0.4g |
| Pack Quantity | 1 |
| Battery Voltage | 1.55V |
| External Height | 2.66mm |
| Battery Capacity | 28mAh |
| Battery Iec Code | SR626SW |
| Battery Neda Code | 1176SO |
| Battery Size Code | SR66 |
| Battery Terminals | Flat Top |
| External Diameter | 6.8mm |
| Battery Technology | Silver Oxide |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2066070/)

## **377** 

SR626SW (SR66) Watch Battery OEM Swiss Made 

## **Technical Data Sheet** 

## **Specifications** 

Chemical system Zinc / Monovalent Silver Oxide, low drain Nominal Voltage 1,55 V Capacity 28 mAh,  Discharge over 34,8 kΩ at 20°C to 1,2 V Operating Temperature 0°C – 60°C Self Discharge Less than 5% per year at 20°C Weight ~0,40 g 

## **Dimensions** 

(according to IEC 60086-3) 

Diameter 6,80 mm (0,268“) Height 2,60 mm (0,102“) 

## **Discharge Curve** 

Constant Load 34,8 kΩ Starting Drain 44,8 µA Temperature 20°C 

**==> picture [217 x 135] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.7<br>1.6<br>po<br>1.5 7<br>1.4<br>P| |<br>1.3<br>Po} ft |<br>1.2<br>| |tt| ft | dT<br>1.1 PoP |<br>0 100 200 300 400 500 600 700<br>Time [h]<br>Voltage [V]<br>**----- End of picture text -----**<br>


_Information and contents in this data sheet are for reference purpose only. They do not constitute any warranty or representation and are subject to change without notice. For most current information and further details, please contact your Renata representative. For safety related information please consult the PSDS document related to that product or product family._ 

Rev. 377MF_OEM.03 2010/11 

Renata SA CH-4452 Itingen/Switzerland 

Tel. +41 (0)61 975 75 75 sales@renata.com Fax. +41 (0)61 975 75 95 www.renata.com 



## Links

- [View this product on Novapart](https://novapart.co/products/377/battery-watch-single-cell-155-v-sr66-silver-oxide)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/en-ES/renata/377/cell-button-s-oxide-1-55v-377/dp/2066070)
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