Watch battery · silver oxide
SR41SW (384) battery
SR41SW = 384 = SB-A1. 7.91 × 3.6 mm1 silver oxide, 1.55 V1. Equivalents: V384, B-SR41L, 247, 280-18, 080-D01, 9919 and 4 more (13 codes in 10 code systems, full table); 51 calibres, modules and models in our base take it.
Cell types in this size
SR41SW
Low drain (SW): for plain analog watches · Silver Oxide2
12 codes in our sources name this cell type.
LR41
Alkaline cell of the same size: the IEC digits are the size, the L is the chemistry. LR41 lands on this page by that rule; our sources hold no alkaline datasheet for it, so no figures are shown.
Capacity by manufacturer
Energizer 384SR41SW
41 mAh2cutoff 1.3 V as printedDatasheet ↗
Can I use another cell instead of 384?
Verdicts follow our swap rules from the datasheet size, voltage and cell type.
Use instead of SR41SW
LR41
Fits, with a catchFits, but LR41 is alkaline and runs shorter.
Same 7.9 mm × 3.6 mm size. LR41 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR41SW.
Draw both cells in the swap checkerNo: SR731SW is 0.5 mm thinner than SR41SW.
Same 7.9 mm diameter, but SR731SW is 3.1 mm against 3.6 mm: the contact spring may not reach it.
SR731SW: 7.9 mm1 × 3.1 mm1, 1.55 V1
Draw both cells in the swap checkerNo: SR754SW is 1.8 mm taller than SR41SW.
Same 7.9 mm diameter, but SR754SW stands 5.4 mm against 3.6 mm: the case back presses on it or does not close.
SR754SW: 7.9 mm1 × 5.4 mm1, 1.55 V1
Draw both cells in the swap checker
What uses 384
51 calibres, modules and models in our base name this size.
Seiko calibres51[3]
Seiko's battery chart gives 1–3 years of battery life for these calibres. Seiko, Pulsar, Lorus and Alba calibres share the chart.
- 1600
- 1609
- 2622
- 2623
- 4100
- 4110
- 4120
- 4122
All 51 calibres
- 4130A
- 4130B
- 4300
- 4301
- 4302
- 4303
- 4312
- 4316
- 4325
- 4326
- 4366
- 4700
- 4720
- 7902
- 7903
- 7918
- 8C25
- Y433
- 0531
- 0532
- 0533
- 0534
- A638
- A639
- M929
- S023
- S024
- S026
- S027
- W610
- Y430
- Y446
- Y456
- Y476
- Y486
- Y723
- Y726
- Y728
- Y729
- H461
- V031
- Y651
- Y652
Questions
What is the 384 battery equivalent?
SR41SW, V384, B-SR41L, 247, 280-18, 080-D01, SB-A1, 9919, 9920, SR736 and 1 more codes name the same 7.9 × 3.6 mm silver oxide cell as 384. Any maker's cell under one of these codes fits.
Is 329 the same as 384?
No. SR731SW is 0.5 mm thinner than SR41SW. Same 7.9 mm diameter, but SR731SW is 3.1 mm against 3.6 mm: the contact spring may not reach it.
Is LR41 the same as SR41SW?
No: LR41 is an alkaline cell of the same size, SR41SW is silver oxide. Fits, but LR41 is alkaline and runs shorter. Same 7.9 mm × 3.6 mm size. LR41 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR41SW.
What watches use the 384 battery?
In our base: 51 Seiko calibres (1600, 1609, 2622, 2623…). The full lists are on this page, with the brand tables they come from.
How long does a 384 battery last in a watch?
Seiko's battery chart gives 1 to 3 years for its 51 calibres on this cell, 2 years most often. Life depends on the calibre's current draw, not on the cell alone.
Seiko battery chart[3]
Sources
Documents checked · Report a wrong number
- 1Murata — Watch Battery Selection Guide / Cross Reference · pdf · read
- 2Energizer Holdings, Inc. — Product datasheet ENERGIZER 384 · pdf · read
- 3Seiko Watch Corporation (service information) — Value Checking List / Battery No. Cross-reference Chart · pdf · read