Watch battery · silver oxide
SR920SW (371) battery
SR920SW = 371 = SB-AN. 9.51 × 2.05 mm1 Sources disagree: manufacturer 2.05 mm / secondary source 2 mm2 silver oxide, 1.55 V1. Equivalents: SR920W, 370, V371, B-371L, 605, 280-31 and 17 more (26 codes in 13 code systems, full table); 159 calibres, modules and models in our base take it.
SR920SW equivalents
The same cell under 26 names. Any of them fits where 371 does; the drain type is the column.
| Code system | SR920SWlow drain | SR920Whigh drain |
|---|---|---|
| IEC | SR9211SR691 | SR69W2secondary source |
| Energizer | 3711 | 3701 |
| Rayovac | RW3152secondary source | RW4152secondary source |
| Duracell | D3712secondary source | D3702secondary source |
| Varta | V3711 | V3701 |
| Seiko | SB-AN1 | SB-BN1 |
| Citizen | 280-311 | 280-511 |
| Orient | 080-D301 | — |
| Timex | — | Z1 |
| Bulova | 6051 | 6201 |
| Omega | 99291 | 99451 |
| Berec | B-371L1 | B-370H1 |
| Waltham | G1 | — |
Size and chemistry
Show SR920SW at true size (1:1)
What uses 371
159 calibres, modules and models in our base name this size.
Movements1
Seiko calibres153[4]
Seiko's battery chart gives 2–5 years of battery life for these calibres. Seiko, Pulsar, Lorus and Alba calibres share the chart.
- 2M21
- 5H22
- 5H23
- 5H26
- 5L10
- 5L14
- 5L15
- 5P22
All 153 calibres
- 5P23
- 5P29
- 5P30
- 5P31
- 5P32
- 5P39
- 5Y00
- 5Y01
- 5Y02
- 5Y22
- 5Y23
- 5Y29
- 5Y30
- 5Y31
- 5Y32
- 5Y39
- 5Y37
- 5Y63
- 5Y66
- 5Y67
- 6F22
- 6F24
- 6F28
- 6F29
- 6F38
- 6F25
- 6F26
- 6F75
- 6F32
- 6F34
- 6L01
- 6020A
- 6020B
- 6030
- 6530
- 6531
- 6532
- 6533
- 6539
- 7N22
- 7N29
- 7N33
- 7N35
- 7N36
- 7N42
- 7N43
- 7N21C
- 7N22C
- 7N29C
- 7N32C
- 7N33C
- 7N39C
- 7N42C
- 7N43C
- 7N47C
- 7N48C
- 7N35C
- 7N36C
- 7N47
- 7N48
- 7N93
- 7N93C
- 8J55A
- 8J56A
- 8J55B
- 8J56B
- 8M11
- 8M15
- 8M18
- 8M25
- 8M26
- 8M32
- 8M35
- 8M37
- 8M44
- 8M48
- 8M51
- 9F61
- 9F62
- 9F82
- 9F83
- 9061
- 9063
- 9544
- 9641
- 9642
- 9661
- 9681
- 9682
- V347
- V348
- V621
- V653B
- V658B
- V654
- V655A
- V656
- V657A
- V655B
- V657B
- V671
- V691
- V692
- V693
- V694
- V695
- V69F
- V721B
- V722A
- V729A
- V733A
- V735A
- V736A
- V742A
- V743A
- V721C
- V722C
- V729C
- V732C
- V733C
- V735C
- V739C
- V742C
- V743C
- V744C
- V736C
- VD53
- VX32E
- VX3KE
- VX42E
- VX43E
- Y100
- Y101
- Y102
- Y109
- W598
- H556
- H557
- H601
- H801
- H803
- V011
- V051
- Y960
- Y961
Watches with a page1
Cell types in this size
2 cell types share the 9.5 × 2.05 mm size.
SR920SW
Low drain (SW): for plain analog watches · Silver Oxide3
13 codes in our sources name this cell type.
SR920W
High drain (W): for watches with lights, alarms or chronographs · Silver Oxide5
11 codes in our sources name this cell type.
LR920
Alkaline cell of the same size: the IEC digits are the size, the L is the chemistry. LR920 lands on this page by that rule; our sources hold no alkaline datasheet for it, so no figures are shown.
Capacity by manufacturer
Energizer 371SR920SW
34 mAh3cutoff 1.3 V as printedDatasheet ↗
Energizer 370SR920W
34 mAh5cutoff 1.3 V as printedDatasheet ↗
Can I use another cell instead of 371?
Verdicts follow our swap rules from the datasheet size, voltage and cell type.
Use instead of SR920SW
SR920W
Fits, with a catchFits: SR920W is the high-drain version of the same size.
SR920W and SR920SW are both 9.5 mm × 2.05 mm, 1.55 V silver oxide. SR920W is made for bursts of current (lights, alarms); in a plain watch it works but may not last as long as SR920SW.
Draw both cells in the swap checkerUse instead of SR920SW
LR920
Fits, with a catchFits, but LR920 is alkaline and runs shorter.
Same 9.5 mm × 2.05 mm size. LR920 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR920SW.
Draw both cells in the swap checkerNo: SR916SW is 0.4 mm thinner than SR920SW.
Same 9.5 mm diameter, but SR916SW is 1.65 mm against 2.05 mm: the contact spring may not reach it.
SR916SW: 9.5 mm1 × 1.65 mm1 Sources disagree: manufacturer 1.65 mm / secondary source 1.6 mm2, 1.55 V1
Draw both cells in the swap checkerNo: SR927SW is 0.65 mm taller than SR920SW.
Same 9.5 mm diameter, but SR927SW stands 2.7 mm against 2.05 mm: the case back presses on it or does not close.
SR927SW: 9.5 mm1 × 2.7 mm1, 1.55 V1
Draw both cells in the swap checkerNo: CTL920F is a rechargeable cell.
SR920SW is a primary silver oxide battery, 1.55 V. CTL920F is cobalt-titanium rechargeable, 2.3 V; a battery-powered watch has no circuit to charge it.
CTL920F: 9.5 mm7 × 2 mm7, 2.3 V7
Draw both cells in the swap checkerNo: MT920 is a rechargeable cell.
SR920SW is a primary silver oxide battery, 1.55 V. MT920 is manganese-titanium rechargeable, 1.5 V; a battery-powered watch has no circuit to charge it.
MT920: 9.5 mm8 × 2 mm8, 1.5 V8
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 371 battery equivalent?
SR920SW, SR920W, V371, B-371L, 605, 280-31, 9929, 080-D30, SB-AN, SR921 and 13 more codes name the same 9.5 × 2.05 mm silver oxide cell as 371. Any maker's cell under one of these codes fits; match the drain type (SW or W) when the watch maker names one.
Is 373 the same as 371?
No. SR916SW is 0.4 mm thinner than SR920SW. Same 9.5 mm diameter, but SR916SW is 1.65 mm against 2.05 mm: the contact spring may not reach it.
Can I use 370 instead of 371?
Yes, it fits: 370 is SR920W, the high-drain cell of the same size. SR920W and SR920SW are both 9.5 mm × 2.05 mm, 1.55 V silver oxide. SR920W is made for bursts of current (lights, alarms); in a plain watch it works but may not last as long as SR920SW.
Is LR920 the same as SR920SW?
No: LR920 is an alkaline cell of the same size, SR920SW is silver oxide. Fits, but LR920 is alkaline and runs shorter. Same 9.5 mm × 2.05 mm size. LR920 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR920SW.
What watches use the 371 battery?
In our base: 153 Seiko calibres (2M21, 5H22, 5H23, 5H26…); 10 Casio models; movements such as TMI VH31. The full lists are on this page, with the brand tables they come from.
How long does a 371 battery last in a watch?
Seiko's battery chart gives 2 to 5 years for its 153 calibres on this cell, 5 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 371 · pdf · read
- 4Seiko Watch Corporation (service information) — Value Checking List / Battery No. Cross-reference Chart · pdf · read
- 5Energizer Holdings, Inc. — Product datasheet ENERGIZER 370 · pdf · read