Watch Battery Cross Reference

Watch batteries have a confusing array of names, so it can be difficult to know which battery to purchase for your quartz watch. The table below lists the most common watch battery sizes along with their various names for different standards and manufacturers. Some batteries also have multiple names based on specifics of drain or capacity but these are usually interchangeable.

I strongly recommend buying Renata-brand batteries. They are made in Switzerland by the Swatch Group and are much more reliable in terms of sizing and capacity than cheap knock-offs. And they really don’t cost much more!

This chart is organized by diameter and height in millimeters. I am only listing batteries used by one or more major watch manufacturers. All popular compact watch batteries are 1.55 Volts and use the IEC SR prefix. IEC “SW” indicates low-drain while “W” indicated high-drain.

Dia. (mm)	Ht. (mm)	IEC	IEC SR	USA	Renata	Citizen	Seiko	Timex
5.80	1.25	SR512SW	335	335	280-68	SB-AB
5.80	1.65	SR516SW	SR62	317	53	280-58	SB-AR	CA
5.80	2.15	SR521SW	SR63	379	50	280-59	SB-AC/DC	JA
5.80	2.60	SR527SW	SR64	319	319	280-60	SB-AE/DE
6.80	1.45	SR614SW	339	52
6.80	1.65	SR616SW	SR65	321	38	280-73	SB-AF/DF	DA
6.80	2.15	SR621SW	SR60	364	31	280-34	SB-AG/DG	T
6.80	2.60	SR626W SR626SW	SR66	376 377	37 43	280-39	SB-AW	BA MA
7.90	1.30	SR712SW	346	346	280-66	SB-DH
7.90	1.45	SR714SW	341	39
7.90	1.65	SR716SW	SR67	315	315	280-56	SB-AT	HA
7.90	2.10	SR721W SR721SW	SR58	361 362	19 46	280-29 280-53	SB-AK/DK SB-BK-EK	S X
7.90	2.60	SR726W SR726SW	396 397	280-28 280-52	SB-AL SB-BL
7.90	3.10	SR731SW	329	24
7.90	3.60	SR736W SR736SW	MR41* SR41	325* 384 392	2	280-02* 280-13 280-18	SB-A1/D1 SB-B1 SB-C1*	K
7.90	5.35	SR754W	MR48* SR48	323* 393	16	SB-B3	C* F
9.50	1.65	SR916W SR916SW	SR68	372 373	41	280-45	SB-AJ/DJ	WA
9.50	2.10	SR920W SR920SW	SR69	370 371	30 36	280-31 280-51	SB-AN SB-BN	Z
9.50	2.60	SR927W SR927SW	395 399	280-44 280-48	SB-AP/DP SB-BP/EP
9.50	3.60	SR936W SR936SW	380 394	27	280-17	SB-A4
11.60	1.65	SR1116W SR1116SW	365 366	365 366	280-46
11.60	2.05	SR1120W SR1120SW	SR55	381 391	23 34	280-27 280-30	SB-AS/DS SB-BS/LS	L
11.60	3.00	SR1130W SR1130SW	SR54	389 390	280-15 280-24	11 17	SB-Au SB-BU	M
11.60	4.20	SR1142W SR1142SW	MR43* SR43	301 354* 386	6	280-01 280-41	SB-A8 SB-B8 SB-C8*	D H
11.60	3.60	SR1136W SR1136SW	MR42* SR42	343* 344 350	12	280-05*	B*
11.60	5.40	SR1154W SR1154SW	MR44* SR44 SR67	303 313* 357	7 9 14	280-08 280-06 280-62	SB-A9 SB-B9	A J

IEC naming focuses on the battery size in millimeters. For example, the common SR626SW measures 6.80 by 2.60 mm while the SR621SW measures 6.80 by 2.15 mm. This standard is mostly followed by Japanese manufacturers, including Maxell, Panasonic, and Sony.
American companies like Duracell, Energizer, Eveready, Rayovac, as well as watch companies like Bulova, follow a numeric naming system with most batteries having a 3xx number.

* Note that most batteries use silver-oxide chemistry. The following batteries use mercury chemistry, as indicated by the “MR” IEC number: 313, 323, 325, 343, 354, and 387. You should use silver-oxide “SR” batteries instead.