Watch battery finder by model and size
Free watch battery finder. Pick a brand and type your model (or Casio module number) to see the exact replacement battery — CR2016, SR626SW, LR44, CR1220 and dozens of other common cells. A full size chart below shows voltage, diameter and height so you can cross-reference any battery code you already have.
How to find your watch battery
1
Open the back of the watch (optional)
If accessible, the battery often has its code printed directly on it — that is always the authoritative answer.
2
Pick your brand
Choose Casio, Seiko, Citizen, Timex, etc. to narrow the search.
3
Type the model or module
e.g. "F-91W", "DW-5600" or the Casio module number ("3229").
4
Read the battery code
The right column shows the battery type plus any common equivalents (SR626SW / 377).
5
Cross-check on the battery itself
Before ordering, confirm the code stamped on the physical cell. Production batches sometimes differ.
Look up the exact battery (CR2016, SR626SW, 377 and more) for popular Casio, Seiko, Citizen, Timex, Tissot, Swatch and Fossil models.
🔍 Search by model
No match. Try a different brand or check the size chart below.
📘 Battery types and sizes
| Battery | Equivalents | Voltage | Size | Typical use |
|---|---|---|---|---|
| SR626SW / 377 | 377, SR626SW, AG4, 626, SR66 | 1.55V | ⌀6.8 mm × 2.6 mm | Most analog dress watches |
| SR626W / 376 | 376, SR626W, 626 | 1.55V | ⌀6.8 mm × 2.6 mm | Some low-drain analog quartz |
| SR621SW / 364 | 364, SR621SW, AG1, 621 | 1.55V | ⌀6.8 mm × 2.1 mm | Slim/dress watches |
| SR920SW / 371 | 371, SR920SW, AG6, 920 | 1.55V | ⌀9.5 mm × 2.1 mm | Chronographs, mid-drain quartz |
| SR726SW / 397 | 397, SR726SW, SB-AL, 280-28 (low-drain) | 1.55V | ⌀7.9 mm × 2.6 mm | Mid-size analog quartz |
| SR927W / 399 | 399, SR927W, SB-BP, AG7 (high-drain) | 1.55V | ⌀9.5 mm × 2.6 mm | Miyota 0S/6S chronographs, Seiko 7T high-drain - the 399 cell |
| SR927SW / 395 | 395, SR927SW, SB-AP (low-drain twin of 399) | 1.55V | ⌀9.5 mm × 2.6 mm | Low-drain twin of 399 - Ronda 5030.D / 5040.x Swiss chronographs, Seiko 7T11 / 7T27 / 7T92 |
| SR521SW / 379 | 379, SR521SW, AG0, 521 | 1.55V | ⌀5.8 mm × 2.1 mm | Thin ladies watches |
| SR726W / 396 | 396, SR726W, SB-BL, 280-52 (high-drain) | 1.55V | ⌀7.9 mm × 2.6 mm | Baby-G and similar |
| LR44 / AG13 | LR44, AG13, A76, 357A, 303 | 1.5V | ⌀11.6 mm × 5.4 mm | Budget Casio digitals (A158/A168) |
| CR1220 | CR1220, BR1220 | 3V | ⌀12.5 mm × 2.0 mm | G-Shock GA-100/GA-110 |
| CR2016 | CR2016, BR2016, DL2016 | 3V | ⌀20.0 mm × 1.6 mm | Most Casio digital watches (F-91W, DW-5600) |
| CR2025 | CR2025, BR2025, DL2025 | 3V | ⌀20.0 mm × 2.5 mm | Casio AE-1200, Ironman classic |
| CR2032 | CR2032, BR2032, DL2032 | 3V | ⌀20.0 mm × 3.2 mm | Larger digitals, some fitness trackers |
| CR1616 | CR1616, BR1616, DL1616 | 3V | ⌀16.0 mm × 1.6 mm | Casio MWC-100 LED light cell and some G-Shock LED variants |
| CR1632 | CR1632, BR1632, DL1632, ECR1632 | 3V | ⌀16.0 mm × 3.2 mm | Tissot T-Touch Classic (1st-gen tactile) and similar thick lithium cells |
| CR1620 | CR1620, BR1620, DL1620, ECR1620 | 3V | ⌀16.0 mm × 2.0 mm | Casio Wave Ceptor radio-controlled digital (WV-M60 / WV-M200) and similar |
| CR2430 | CR2430, BR2430, DL2430, ECR2430 | 3V | ⌀24.5 mm × 3.0 mm | Fossil Hybrid HR / Hybrid smartwatches (mechanical hands + e-ink) |
| BR2325 | BR2325, CR2325 | 3V | ⌀23.0 mm × 2.5 mm | Vintage Seiko computer / data watches (UC-2000, RC-1000) |
| MT621 | MT621 (Panasonic) | 1.55V | ⌀6.8 mm × 2.1 mm | Seiko Solar V157 (NOT user-replaceable) |
| MT920 | MT920 (Panasonic) | 1.55V | ⌀9.5 mm × 2.1 mm | Seiko Solar V172 (NOT user-replaceable) |
| CTL1616 | CTL1616 (Panasonic) | 1.55V | ⌀16.0 mm × 1.6 mm | Casio solar (G-Shock tough solar) — NOT user-replaceable |
| SR516SW / 317 | 317, SR516SW, AG0, 516 | 1.55V | ⌀5.8 mm × 1.65 mm | Swatch Skin and similar ultra-thin watches |
| SR731SW / 329 | 329, SR731SW, AG3, 731 | 1.55V | ⌀7.9 mm × 3.1 mm | Swatch Lady and small ladies' watches |
| SR716SW / 315 | 315, SR716SW, SR67 | 1.55V | ⌀7.9 mm × 1.65 mm | Vintage Seiko ladies quartz (caliber 5E20 and similar) |
| SR1130SW / 390 | 390, SR1130SW, AG10, 1130, 389/390 | 1.55V | ⌀11.6 mm × 3.1 mm | Swatch Gent, New Gent and Pop plastic lines |
| SR1136W / 350 | 350, SR1136W (SR42), Renata 350 - high-drain; NOT SR1130W / 389, which is 0.55 mm thinner | 1.55V | ⌀11.6 mm × 3.6 mm | Fossil Philippe Starck digital chronographs (PH series) - 3.6 mm tall, not the thinner SR1130W |
| SR936SW / 394 | 394, SR936SW, AG9, 936 | 1.55V | ⌀9.5 mm × 3.6 mm | Swiss quartz chronographs (ETA G10.211, VK64A mecha-quartz) |
| SR920W / 370 | 370, SR920W, SB-BN (high-drain twin of 371) | 1.55V | ⌀9.5 mm × 2.05 mm | High-drain twin of 371 - Seiko hybrid multifunction (H601 / H801) |
| SR936W / 380 | 380, SR936W (high-drain twin of 394) | 1.55V | ⌀9.5 mm × 3.6 mm | High-drain twin of 394 - Breitling SuperQuartz Cal. 79 (Aerospace Evo) |
| SR41W / 392 | 392, SR41W, SB-B1, AG3 (high-drain) | 1.55V | ⌀7.9 mm × 3.6 mm | Vintage Seiko Voice Master and small button-cell watches |
| SR41SW / 384 | 384, SR41SW, SB-A1 (low-drain twin of 392) | 1.55V | ⌀7.9 mm × 3.6 mm | Low-drain twin of 392 - Ronda 3540.D, vintage Seiko 79xx LCD |
| SR616SW / 321 | 321, SR616SW, AG1 | 1.55V | ⌀6.8 mm × 1.65 mm | Vintage thin Seiko ladies quartz (caliber 7N00) |
| SR721SW / 362 | 362, SR721SW, AG11 | 1.55V | ⌀7.9 mm × 2.1 mm | Vintage Seiko late-1970s ladies quartz (5930-series, 74xx) |
| SR527SW / 319 | 319, SR527SW, AG0 | 1.55V | ⌀5.8 mm × 2.7 mm | Vintage Seiko 1970s tiny ladies quartz (5420 / 5421 / 2G28 / 2G78) |
| SR916SW / 373 | 373, SR916SW, AG6 | 1.55V | ⌀9.5 mm × 1.65 mm | Vintage Seiko 1970s mens / thin quartz (90xx / 95xx) |
| SR1120SW / 381 | 381, SR1120SW, SB-AS, 280-27 (low-drain) | 1.55V | ⌀11.6 mm × 2.05 mm | Vintage Seiko King Quartz / Twin Quartz analog (58xx / 92xx / 94xx) |
| SR1120W / 391 | 391, SR1120W, SB-BS, 280-30 (high-drain twin of 381) | 1.55V | ⌀11.6 mm × 2.05 mm | High-drain twin of 381 - Seiko A-series LCD alarm chronographs, Casio Baby-G BG-390 / BG-391 |
| CR1216 | CR1216, BR1216, DL1216 | 3V | ⌀12.5 mm × 1.6 mm | Casio vintage ladies digital (LA670W / LA680W / LA-11W, module 3191) |
| SR714SW / 341 | 341, SR714SW, AG2 | 1.55V | ⌀7.9 mm × 1.4 mm | Thin Swiss quartz (FC-220 Ronda 1016 variant, vintage ladies) |
| CR2012 | CR2012, BR2012, DL2012 (very thin 1.2 mm) | 3V | ⌀20.0 mm × 1.2 mm | Casio Lineage 10-year battery (LIN-168 / 169 / 171 / 172 — thin titanium) |
⚠️
Confirm the battery code printed on your watch cell before purchase. Different production batches of the same model occasionally ship different calibres. Solar and automatic watches contain rechargeable cells or no battery — take them to a service center rather than a drug store.
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