Watch battery · silver oxide
SR927SW (395) battery
SR927SW = 395 = SB-AP. 9.51 × 2.7 mm1 silver oxide, 1.55 V1. Equivalents: SR927W, SR927, V395, B-SR57L, 610, 280-48 and 17 more (26 codes in 14 code systems, full table); 174 calibres, modules and models in our base take it.
SR927SW equivalents
The same cell under 26 names. Any of them fits where 395 does; the drain type is the column.
| Code system | SR927SWlow drain | SR927Whigh drain | SR927 |
|---|---|---|---|
| IEC | SR9271SR571 | SR57W2secondary source | — |
| Energizer | 3951 | 3991 | — |
| Rayovac | RW3132secondary source | RW4132secondary source | — |
| Duracell | D3952secondary source | D3992secondary source | — |
| Varta | V3951 | V3991 | — |
| Seiko | SB-AP1 | SB-BP1 | — |
| Citizen | 280-481 | 280-441 | — |
| Orient | 080-D251 | 080-D191 | — |
| Timex | — | W1 | — |
| Bulova | 6101 | 6131 | — |
| Omega | 99301 | — | — |
| Berec | B-SR57L1 | B-SR57H1 | — |
| Mallory | D3951 | — | — |
| Waltham | K1 | — | — |
What uses 395
174 calibres, modules and models in our base name this size.
Seiko calibres124[4]
Seiko's battery chart gives 1.5–5 years of battery life for these calibres. Seiko, Pulsar, Lorus and Alba calibres share the chart.
- 2632
- 2633
- 2639
- 5B21
- 5S21
- 5S42
- 5T12
- 5T24
All 124 calibres
- 5T32
- 5T52
- 5T72
- 5T50
- 5T82
- 6A32
- 6M12
- 6M13
- 6M15
- 6M23
- 6M25
- 6M26
- 6M37
- 6M91
- 6922
- 6923
- 7C43
- 7J21
- 7T04
- 7T11
- 7T22
- 7T27
- 7T24
- 7T32
- 7T34
- 7T36
- 7T42
- 7T44
- 7T39
- 7T52
- 7T59
- 7T62
- 7T82
- 7T84A
- 7T85
- 7T86
- 7T92
- 7T94
- 7800
- 7810
- 7812
- 7813
- 7820
- 7830
- 7832
- 7853
- 9920
- 9923
- 9921
- 9940
- 9942
- 9943
- 9980
- 9983
- N944
- N945
- N94J
- V52HA
- V531
- V534
- V532
- V533
- V535
- V536
- V537
- V539
- V53L
- V544
- V681
- V682
- Y106
- Y107
- Y108
- Y142
- Y143
- Y145
- Y147
- Y148
- Y182A
- Y182B
- Y187
- Y189
- Y551
- Y552
- Y553
- Y557
- Y558
- Y559
- YM56
- YM62
- A229
- A239
- A257
- A259
- A439
- B122
- B137
- C359
- D031
- F162
- L012
- S600
- W600
- Y478
- H249
- H259
- H357
- H448
- H449
- H558
- H711
- V071
- V072
- Y911
- Y950
- Y951
Casio modules7[6]
29 Casio models in Casio's manual index sit on these modules.
Citizen models14[7]
On 2 calibres, from Citizen's battery table.
- 05208 models
- 05106 models
The 14 model numbers
AN3394-59L · AN3662-51W · AN3666-51A · AN3668-55W · AN3669-52E · AN3700-62A · AN8050-51M · AN8052-55P · AN8054-50E · AN8170-59L · AN8172-53P · AN8175-55E · AN8192-56P · AN8194-51L
Watches with a page2
Cell types in this size
3 cell types share the 9.5 × 2.7 mm size.
SR927SW
Low drain (SW): for plain analog watches · Silver Oxide3
14 codes in our sources name this cell type.
SR927W
High drain (W): for watches with lights, alarms or chronographs · Silver Oxide5
11 codes in our sources name this cell type.
SR927
Primary cell
0 codes in our sources name this cell type.
LR927
Alkaline cell of the same size: the IEC digits are the size, the L is the chemistry. LR927 lands on this page by that rule; our sources hold no alkaline datasheet for it, so no figures are shown.
Capacity by manufacturer
Energizer 395SR927SW
52 mAh3cutoff 1.3 V as printedDatasheet ↗
Energizer 399SR927W
52 mAh5cutoff 1.3 V as printedDatasheet ↗
Can I use another cell instead of 395?
Verdicts follow our swap rules from the datasheet size, voltage and cell type.
Use instead of SR927SW
SR927W
Fits, with a catchFits: SR927W is the high-drain version of the same size.
SR927W and SR927SW are both 9.5 mm × 2.7 mm, 1.55 V silver oxide. SR927W is made for bursts of current (lights, alarms); in a plain watch it works but may not last as long as SR927SW.
Draw both cells in the swap checkerUse instead of SR927SW
SR927
YesYes: SR927 is the same size and chemistry as SR927SW.
Both are 9.5 mm × 2.7 mm silver oxide, 1.55 V.
Draw both cells in the swap checkerUse instead of SR927SW
LR927
Fits, with a catchFits, but LR927 is alkaline and runs shorter.
Same 9.5 mm × 2.7 mm size. LR927 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR927SW.
Draw both cells in the swap checkerNo: SR920SW is 0.65 mm thinner than SR927SW.
Same 9.5 mm diameter, but SR920SW is 2.05 mm against 2.7 mm: the contact spring may not reach it.
SR920SW: 9.5 mm1 × 2.05 mm1 Sources disagree: manufacturer 2.05 mm / secondary source 2 mm2, 1.55 V1
Draw both cells in the swap checkerNo: SR936SW is 0.9 mm taller than SR927SW.
Same 9.5 mm diameter, but SR936SW stands 3.6 mm against 2.7 mm: the case back presses on it or does not close.
SR936SW: 9.5 mm1 × 3.6 mm1, 1.55 V1
Draw both cells in the swap checker
Warnings from the makers
Not a stand-in for a 3 V lithium cell
“are 3 volts, not 1.5 volts and cannot be substituted for a 1.5 volt silver oxide watch battery”[2]secondary source
Questions
What is the 395 battery equivalent?
SR927SW, SR927W, SR927, V395, B-SR57L, 610, 280-48, D395, 9930, 080-D25 and 13 more codes name the same 9.5 × 2.7 mm silver oxide cell as 395. Any maker's cell under one of these codes fits; match the drain type (SW or W) when the watch maker names one.
Is 371 the same as 395?
No. SR920SW is 0.65 mm thinner than SR927SW. Same 9.5 mm diameter, but SR920SW is 2.05 mm against 2.7 mm: the contact spring may not reach it.
Can I use 399 instead of 395?
Yes, it fits: 399 is SR927W, the high-drain cell of the same size. SR927W and SR927SW are both 9.5 mm × 2.7 mm, 1.55 V silver oxide. SR927W is made for bursts of current (lights, alarms); in a plain watch it works but may not last as long as SR927SW.
Is LR927 the same as SR927SW?
No: LR927 is an alkaline cell of the same size, SR927SW is silver oxide. Fits, but LR927 is alkaline and runs shorter. Same 9.5 mm × 2.7 mm size. LR927 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR927SW.
What watches use the 395 battery?
In our base: 124 Seiko calibres (2632, 2633, 2639, 5B21…); 14 Citizen models; 29 Casio models; movements such as Citizen 0510 (quartz chronograph), Miyota 0S20 (OS20), Miyota 6S21. The full lists are on this page, with the brand tables they come from.
How long does a 395 battery last in a watch?
Seiko's battery chart gives 1.5 to 5 years for its 123 calibres on this cell, 2 years most often. Life depends on the calibre's current draw, not on the cell alone.
Seiko battery chart[4]
Sources
Documents checked · Report a wrong number
- 1Murata Manufacturing Co., Ltd. — Watch Battery Selection Guide / Cross Reference (1 page) · pdf · read
- 2WatchBattery (UK) Ltd — Watch Battery Cross Reference Table · html · read
- 3Energizer Holdings, Inc. — Product datasheet ENERGIZER 395 · pdf · read
- 4Seiko Watch Corporation (service information) — Value Checking List / Battery No. Cross-reference Chart · pdf · read
- 5Energizer Holdings, Inc. — Product datasheet ENERGIZER 399 · pdf · read