Watch battery · silver oxide
SR43SW (301) battery
SR43SW = 301 = SB-A8. 11.61 × 4.2 mm1 silver oxide, 1.55 V1. Equivalents: V301, B-SR43L, 226, 280-01, D301, 9902 and 4 more (13 codes in 11 code systems, full table); 56 calibres, modules and models in our base take it.
What uses 301
56 calibres, modules and models in our base name this size.
Seiko calibres56[3]
Seiko's battery chart gives 1–10 years of battery life for these calibres. Seiko, Pulsar, Lorus and Alba calibres share the chart.
- 0822
- 0823
- 0841
- 0842
- 0843
- 0852
- 0853
- 0903
All 56 calibres
- 0920
- 0922
- 0923
- 4335
- 4336
- 4622
- 4623
- 4633
- 4821
- 4803
- 4840A
- 4842A
- 4843A
- 4822A
- 4823A
- 4883A
- 7C11
- 7C17A
- 7C17B
- 7C21B
- 7C46A
- 7C46B
- 7518
- 7545
- 7546
- 7550
- 7559
- 7548
- 7549
- 8V36
- V636
- Y504
- Y510
- Y512
- Y513
- Y514
- 0114
- 0124
- 0624
- 0634
- 0654
- 0674
- 0644
- 0662
- 0664
- S021
- S022
- S301
Cell types in this size
SR43SW
Low drain (SW): for plain analog watches · Silver Oxide2
12 codes in our sources name this cell type.
LR43
Alkaline cell of the same size: the IEC digits are the size, the L is the chemistry. LR43 lands on this page by that rule; our sources hold no alkaline datasheet for it, so no figures are shown.
Capacity by manufacturer
Energizer 301SR43SW
110 mAh2cutoff 1.3 V as printedDatasheet ↗
Can I use another cell instead of 301?
Verdicts follow our swap rules from the datasheet size, voltage and cell type.
Use instead of SR43SW
LR43
Fits, with a catchFits, but LR43 is alkaline and runs shorter.
Same 11.6 mm × 4.2 mm size. LR43 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR43SW.
Draw both cells in the swap checkerNo: SR1130SW is 1.15 mm thinner than SR43SW.
Same 11.6 mm diameter, but SR1130SW is 3.05 mm against 4.2 mm: the contact spring may not reach it.
SR1130SW: 11.6 mm4 × 3.05 mm4 Sources disagree: manufacturer 3.05 mm / secondary source 3 mm5, 1.55 V4
Draw both cells in the swap checkerNo: SR44SW is 1.2 mm taller than SR43SW.
Same 11.6 mm diameter, but SR44SW stands 5.4 mm against 4.2 mm: the case back presses on it or does not close.
SR44SW: 11.6 mm1 × 5.4 mm1, 1.55 V1
Draw both cells in the swap checker
Questions
What is the 301 battery equivalent?
SR43SW, V301, B-SR43L, 226, 280-01, D301, 9902, 080-D02, SB-A8, SR1142 and 1 more codes name the same 11.6 × 4.2 mm silver oxide cell as 301. Any maker's cell under one of these codes fits.
Is 390 the same as 301?
No. SR1130SW is 1.15 mm thinner than SR43SW. Same 11.6 mm diameter, but SR1130SW is 3.05 mm against 4.2 mm: the contact spring may not reach it.
Is LR43 the same as SR43SW?
No: LR43 is an alkaline cell of the same size, SR43SW is silver oxide. Fits, but LR43 is alkaline and runs shorter. Same 11.6 mm × 4.2 mm size. LR43 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR43SW.
What watches use the 301 battery?
In our base: 56 Seiko calibres (0822, 0823, 0841, 0842…). The full lists are on this page, with the brand tables they come from.
How long does a 301 battery last in a watch?
Seiko's battery chart gives 1 to 10 years for its 56 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 301 · pdf · read
- 3Seiko Watch Corporation (service information) — Value Checking List / Battery No. Cross-reference Chart · pdf · read
- 4Murata Manufacturing Co., Ltd. — Watch Battery Selection Guide / Cross Reference (1 page) · pdf · read
- 5WatchBattery (UK) Ltd — Watch Battery Cross Reference Table · html · read