SR920SW battery equivalent

SR920SW is the silver-oxide watch cell Energizer and Renata sell as 371, rated 1.55 V on both sheets. Both print the same IEC name for it, SR69. On capacity they differ: Energizer’s sheet says 34 mAh, Renata’s says 40 mAh.

Why 34 and 40 mAh

The two ratings use different loads and different cut-off voltages. Energizer rates 34 mAh to 1.3 V on a 30 kΩ continuous drain; Renata rates 40 mAh to 1.2 V on 25.5 kΩ. With the load and the cut-off both different, the two numbers aren’t a like-for-like comparison. The box below lists both with their sources and does not average them.

Size

Renata’s datasheet gives 9.50 mm across and 2.05 mm tall. Energizer’s sheet shows the size only in its drawing, so the size here rests on Renata’s datasheet alone. Renata’s product page rounds the height to 2.0 mm.

Other brands’ numbers

Renata’s cross-reference for its 371 lists Maxell SR920SW, Panasonic SR920SW, Murata SR920SW, Toshiba SR920SW under the same SR920SW name, and Energizer Eveready 371. For Duracell it gives one combined entry, D 370/371, not a separate number for each. That is Renata’s list; Duracell’s own sheets weren’t checked for it.

Specs, with sources

SR920

SR920SW: 371 (silver oxide)

Maker part numbers checked: Energizer 371, Renata 371

Chemistry

Silver oxideEnergizer 371 datasheet, PDF p. 1 · Renata 371 datasheet, PDF p. 1 · checked 2026-10-04

Voltage

1.55 VEnergizer 371 datasheet, PDF p. 1 · Renata 371 datasheet, PDF p. 1 · checked 2026-10-04

Diameter

9.50 mmRenata 371 datasheet, PDF p. 1 · checked 2026-10-04

Height

2.05 mmRenata 371 datasheet, PDF p. 1 · checked 2026-10-04

Rated capacity

Sources disagree

Each maker rates capacity under its own test load and cut-off voltage, so the figures below aren’t measured the same way.

• 34 mAh — Energizer 371 datasheet, PDF p. 1 (30 kΩ continuous, to 1.3 V) (checked 2026-10-04)
• 40 mAh — Renata 371 datasheet, PDF p. 1 (25.5 kΩ, to 1.2 V) (checked 2026-10-04)

Codes printed on the SR920 datasheets

• SR69 printed on Energizer 371 datasheet“Designation: IEC-SR69” · checked 2026-10-04; Renata 371 datasheet“371 SR920SW (SR69)” · checked 2026-10-04
• SR920SW printed on Renata 371 datasheet“371 SR920SW (SR69)” · checked 2026-10-04

Renata’s cross-reference list

Renata, a battery maker, prints these other brands’ part numbers next to its own on each product page. They are Renata’s cross-references, not those brands’ own statements.

Renata 371: Maxell SR920SW, Panasonic SR920SW, Murata SR920SW, Toshiba SR920SW, Energizer Eveready 371, Varta V371, Varta 371, Duracell D 370/371, Citizen 280-31, Seiko SB-ANRenata 371 product page · checked 2026-10-04

All codes on this page: SR69, Citizen 280-31, Duracell D 370/371, Energizer Eveready 371, Maxell SR920SW, Murata SR920SW, Panasonic SR920SW, Seiko SB-AN, SR920SW, Toshiba SR920SW, Varta 371, Varta V371.

What this page doesn’t cover

Other cells

How values are checked and what “equivalent” means here: method.