SR621SW battery equivalent

SR621SW is the silver-oxide cell Energizer and Renata sell as 364, 6.80 mm across and 2.15 mm tall, rated 1.55 V. Both makers’ sheets give the IEC designation SR60.

Other brands’ numbers

Renata’s cross-reference lists 11 other part numbers for its 364: Maxell SR621SW, Panasonic SR621SW, Murata SR621SW, Toshiba SR621SW, Energizer Eveready 364, Varta V364, Rayovac 364, Duracell D 364, Timex T, Citizen 280-34, Seiko SB-AG/DG. That is Renata’s list; the other brands’ own sheets weren’t checked for it.

And 363?

363 is often named next to 364. We found no current 363 datasheet: Energizer’s datasheet address returned “not found” and Renata’s product address returned “gone”. Without one we don’t list its size or say how it relates to the 364.

Specs, with sources

SR621

SR621SW: 364 (silver oxide)

Maker part numbers checked: Energizer 364, Renata 364

Chemistry

Silver oxideEnergizer 364 datasheet, PDF p. 1 · Renata 364 datasheet, PDF p. 1 · checked 2026-09-26

Voltage

1.55 VEnergizer 364 datasheet, PDF p. 1 · Renata 364 datasheet, PDF p. 1 · checked 2026-09-26

Diameter

6.80 mmRenata 364 datasheet, PDF p. 1 · checked 2026-09-26

Height

2.15 mmRenata 364 datasheet, PDF p. 1 · checked 2026-09-26

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.

• 20 mAh — Energizer 364 datasheet, PDF p. 1 (68 kΩ continuous, to 1.3 V) (checked 2026-09-26)
• 19 mAh — Renata 364 datasheet, PDF p. 1 (47.0 kΩ, to 0.9 V) (checked 2026-09-26)

Codes printed on the SR621 datasheets

• SR60 printed on Energizer 364 datasheet, Renata 364 datasheet“Designation: ANSI / NEDA-1175SO, IEC-SR60” · checked 2026-09-26
• SR621SW printed on Renata 364 datasheet“364 SR621SW (SR60)” · checked 2026-09-26

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 364: Maxell SR621SW, Panasonic SR621SW, Murata SR621SW, Toshiba SR621SW, Energizer Eveready 364, Varta V364, Rayovac 364, Duracell D 364, Timex T, Citizen 280-34, Seiko SB-AG/DGRenata 364 product page · checked 2026-09-26

What this page doesn’t cover

Other cells

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