An easy-to-use guide to common watch battery numbers and their equivalent sizes.These cross-references help when a battery code isn’t available or varies by brand.This may help your search for the correct watch battery.

WATCH BATTERY SIZE CHART

1. Silver Oxide Watch Batteries (1.55V) — Primary Type for Watches

Common No.	Alt Numbers	IEC Code	Diameter × Height (mm)	Notes
315	SR716W	SR716SW/W	7.9 × 1.6	Ultra-thin watches
317	SR516SW	SR516	5.8 × 1.6	Tiny dress watches
319	—	SR527SW	5.8 × 2.7	Vintage movements
321	—	SR616SW	6.8 × 1.65	Small ladies watches
329	—	SR731SW	7.9 × 3.1	Thick compact watches
335	V335	SR512SW	5.8 × 1.25	Very thin watches
337	—	SR416SW	4.8 × 1.6	Micro watches
339	—	SR614SW	6.8 × 1.45	Thin movements
341	—	SR714SW	7.9 × 1.45	Ultra-thin
344	—	SR1136SW	11.6 × 3.65	Larger vintage watches
346	—	SR712SW	7.9 × 1.25	Very thin movements
350	—	SR1130	11.6 × 3.1	Older Elgin/Bulova
357 / 303	SR44	SR44SW/W	11.6 × 5.4	High-drain, chronographs
361	—	SR721W	7.9 × 2.1	Seiko, older models
362	—	SR721SW	7.9 × 2.05	Thin midsize
363	—	SR721SW	7.9 × 1.55	Slim dress watches
364	AG1 / LR621	SR621SW	6.8 × 2.1	Very common
365	—	SR1116SW	11.6 × 1.6	Vintage watches
366	—	SR1116W	11.6 × 1.85	High drain
370 / 371	LR920	SR920SW/W	9.5 × 2.05	Very common multi-use
373	—	SR916SW	9.5 × 1.65	Thin mid-sized
376 / 377	AG4 / LR626	SR626SW/W	6.8 × 2.6	One of the most common
379	—	SR521SW	5.8 × 2.1	Small watches
380 / 394	LR936	SR936SW	9.5 × 3.6	Chronographs
381	—	SR1120SW	11.6 × 2.05	Vintage Swiss watches
384 / 392	LR41	SR41SW	7.9 × 3.6	Casio & small digitals
389 / 390	LR1130	SR1130SW/W	11.6 × 3.05	Large older watches
395 / 399	LR57	SR927SW/W	9.5 × 2.6	High or low drain compatible
396 / 397	AG3 / LR926	SR726	7.9 × 2.6	Common mid-size
398 / 396	—	SR726SW	7.9 × 2.6	Similar to above
399	—	SR927W	9.5 × 2.6	High drain

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2. Alkaline Watch Batteries (1.5V)

(Less stable voltage—use silver oxide when possible)

Alkaline Code	Equivalent Silver Oxide	IEC	Size (mm)
LR41	392 / 384	LR736	7.9 × 3.6
LR43	386	LR1142	11.6 × 4.2
LR44 / AG13	357 / 303	LR1154	11.6 × 5.4
LR1130	389 / 390	LR1130	11.6 × 3.05
LR626 / AG4	377	LR626	6.8 × 2.6
LR621 / AG1	364	LR621	6.8 × 2.1
LR60 / AG8	365 / 366	LR1120	11.6 × 2.05
LR69 / AG6	377	LR920	9.5 × 2.1

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3. Lithium Coin Cells (3V) — Digital Watches & G-Shock

Lithium Code	Equivalent	Size (mm)	Used In
CR2032	DL2032	20 × 3.2	G-Shock, smart devices
CR2025	DL2025	20 × 2.5	Remotes, thin Casios
CR2016	DL2016	20 × 1.6	Casio digital
CR2450	DL2450	24 × 5.0	Smartwatches
CR2477	—	24 × 7.7	High-capacity
CR1632	DL1632	16 × 3.2	Automotive fobs
CR1620	DL1620	16 × 2.0	Casio, Timex
CR1616	DL1616	16 × 1.6	Small digitals
CR1225	DL1225	12 × 2.5	Slim watches
CR1220	DL1220	12 × 2.0	Many Casios
CR1216	DL1216	12 × 1.6	Thin watches
CR1025	DL1025	10 × 2.5	Specialty watches
CR927	—	9 × 2.7	Mini digital watches

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4. Lithium Rechargeable (LIR / ML / VL Series)

(Used in solar watches and kinetic systems)

Code	Type	Voltage	Size	Notes
ML1220	Manganese lithium	3.0V	12 × 2.0	Solar Seiko/ Citizen
ML2016	Manganese lithium	3.0V	20 × 1.6	Eco-Drive
ML2020	Manganese lithium	3.0V	20 × 2.0	Eco-Drive
VL2020	Vanadium lithium	2.8V	20 × 2.0	Seiko Kinetic
LIR2032	Lithium-ion	3.6V	20 × 3.2	Rechargeable coin cell