How do I find a replacement watch battery?

Read the number on the old cell — 377, SR626SW, D364, SB-AW, and similar codes all map to one size. Search that number here to see every common equivalent.

Are SR626SW and 377 the same battery?

Yes. 377 is the Energizer-style number and SR626SW is the IEC silver-oxide name. Duracell D377, Renata 377, Varta V377, and Seiko SB-AW are the same size and chemistry.

Can I use an alkaline LR44 in place of a 357?

They are the same size, but not the same battery. LR44 is 1.5 V alkaline and sags as it drains. 357 / SR44 is 1.55 V silver oxide and is the better watch cell.

Find a compatible battery in seconds.

Type any watch, coin, or button-cell number — Energizer, Duracell, Maxell, Renata, Varta, Seiko, Citizen, or IEC — and see the drop-in equivalents.

377 364 371 395 CR2032 CR2025 LR44 357 379 CR2016

Popular sizes

Silver oxide

377

SR626SW · 6.8 × 2.6 mm · 1.55 V

Silver oxide

364

SR621SW · 6.8 × 2.1 mm · 1.55 V

Silver oxide

371

SR920SW · 9.5 × 2.1 mm · 1.55 V

Silver oxide

LR44

LR44 · 11.6 × 5.4 mm · 1.5 V

Silver oxide

357

SR44W · 11.6 × 5.4 mm · 1.55 V

Silver oxide

How it works

Read the number

It is printed on the cell: 377, SR621SW, DL2032, 280-34, SB-AW.

Match the row

Every name in the same group is the same size, voltage, and chemistry.

Mind the chemistry

Do not swap a 3 V lithium coin for a 1.55 V silver-oxide watch cell, even if the diameter looks close.

A faster cross-reference chart

The original batterycrossreference.net table listed button cells by manufacturer. This version keeps that chart and adds instant search, one page per size, and notes on drain rate and chemistry so you can replace a cell without guessing.

Open the full cross-reference chart or read the guide to battery codes.