SR927SW battery equivalent

SR927SW is the silver-oxide watch cell Energizer and Renata sell as 395, rated 1.55 V on both sheets. Both print the same IEC name for it, SR57. On capacity they differ: Energizer’s sheet says 52 mAh, Renata’s says 55 mAh.

Why 52 and 55 mAh

The two ratings use different loads and different cut-off voltages. Energizer rates 52 mAh to 1.3 V on a 20 kΩ continuous drain; Renata rates 55 mAh to 1.2 V on 18.2 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 2.70 mm tall. Energizer’s sheet shows the size only in its drawing, so the size here rests on Renata’s datasheet alone.

Other brands’ numbers

Energizer’s sheet prints the ANSI / NEDA name 1162SO next to the IEC name. Renata’s cross-reference for its 395 lists Maxell SR927SW, Panasonic SR927SW, Murata SR927SW, Toshiba SR927SW under the same SR927SW name, and Energizer Eveready 395. For Duracell it gives one combined entry, D 395/399, not a separate number for each. That is Renata’s list; Duracell’s own sheets weren’t checked for it.

Not a 371 / SR920SW

The 371 is also 9.50 mm across, but Renata’s datasheet gives it 2.05 mm tall against 2.70 mm for the 395:

Specs, with sources

SR927

SR927SW: 395 (silver oxide)

Maker part numbers checked: Energizer 395, Renata 395

Chemistry

Silver oxideEnergizer 395 datasheet, PDF p. 1 · Renata 395 datasheet, PDF p. 1 · checked 2026-10-04

Voltage

1.55 VEnergizer 395 datasheet, PDF p. 1 · Renata 395 datasheet, PDF p. 1 · checked 2026-10-04

Diameter

9.50 mmRenata 395 datasheet, PDF p. 1 · checked 2026-10-04

Height

2.70 mmRenata 395 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.

• 52 mAh — Energizer 395 datasheet, PDF p. 1 (20 kΩ continuous, to 1.3 V) (checked 2026-10-04)
• 55 mAh — Renata 395 datasheet, PDF p. 1 (18.2 kΩ, to 1.2 V) (checked 2026-10-04)

Codes printed on the SR927 datasheets

• SR57 printed on Energizer 395 datasheet“Designation: ANSI / NEDA-1162SO, IEC-SR57” · checked 2026-10-04; Renata 395 datasheet“395 SR927SW (SR57)” · checked 2026-10-04
• 1162SO printed on Energizer 395 datasheet“Designation: ANSI / NEDA-1162SO, IEC-SR57” · checked 2026-10-04
• SR927SW printed on Renata 395 datasheet“395 SR927SW (SR57)” · 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 395: Maxell SR927SW, Panasonic SR927SW, Murata SR927SW, Toshiba SR927SW, Energizer Eveready 395, Varta V395, Rayovac 395, Duracell D 395/399, Timex LA, Citizen 280-48, Seiko SB-AP/DPRenata 395 product page · checked 2026-10-04

All codes on this page: SR57, 1162SO, Citizen 280-48, Duracell D 395/399, Energizer Eveready 395, Maxell SR927SW, Murata SR927SW, Panasonic SR927SW, Rayovac 395, Seiko SB-AP/DP, SR927SW, Timex LA, Toshiba SR927SW, Varta V395.

What this page doesn’t cover

Other cells

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