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Watch battery · silver oxide

SR527SW (319) battery

SR527SW = 319 = SB-AE. 5.81 × 2.7 mm1 silver oxide, 1.55 V1. Equivalents: V319, 615, 280-60, SR527, SR64 (8 codes in 6 code systems, full table); 9 calibres, modules and models in our base take it.

Sources checked · How we source numbers
SR527SW · 319: drawing to scaleSR527SW · 319: diameter 5.8 mm, height 2.7 mm.Ø 5.8−+2.7SR527SW · 319
SR527SW: face and edge view to scale, from the datasheet sizesDrawing from data, not a photo · mm
Diameter
5.8 mm1
Height
2.7 mm1
Nominal voltage
1.55 V1
IEC designation
SR5271 · SR641

SR527SW equivalents

The same cell under 8 names. Any of them fits where 319 does.

Code systemSR527SWlow drain
IECSR5271SR641
Energizer · Rayovac · Renata3191
VartaV3191
SeikoSB-AE1
Citizen280-601
Bulova6151

Size and chemistry

Diameter
5.8 mm1
Height
2.7 mm1
Nominal voltage
1.55 V1
Chemistry
Silver Oxide2
IEC designation
SR5271 · SR641
1.253351.653172.153792.7319
Every 5.8 mm silver oxide size with a page, edge view to scale. Only the height tells them apart.
Show SR527SW at true size (1:1)
1:1 · not calibrated: sizes are approximate
SR527SW: drawing to scaleSR527SW: diameter 5.8 mm, height 2.7 mm.Ø 5.8−+2.7SR527SW
01020304050

Cell types in this size

SR527SW

Low drain (SW): for plain analog watches · Silver Oxide2

7 codes in our sources name this cell type.

LR527

Alkaline cell of the same size: the IEC digits are the size, the L is the chemistry. LR527 lands on this page by that rule; our sources hold no alkaline datasheet for it, so no figures are shown.

Capacity by manufacturer

Energizer 319SR527SW

19 mAh2cutoff 1.2 V as printedDatasheet ↗

Can I use another cell instead of 319?

Verdicts follow our swap rules from the datasheet size, voltage and cell type.

Check any other pair

  • Use instead of SR527SW

    LR527

    Fits, with a catch

    Fits, but LR527 is alkaline and runs shorter.

    Same 5.8 mm × 2.7 mm size. LR527 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR527SW.

    Draw both cells in the swap checker

  • Use instead of SR527SW

    SR521SW

    No

    No: SR521SW is 0.55 mm thinner than SR527SW.

    Same 5.8 mm diameter, but SR521SW is 2.15 mm against 2.7 mm: the contact spring may not reach it.

    SR521SW: 5.8 mm3 × 2.15 mm3 Sources disagree: manufacturer 2.15 mm / secondary source 2.1 mm4, 1.55 V3

    Draw both cells in the swap checker

What uses 319

9 calibres, modules and models in our base name this size.

Seiko calibres9[5]

Seiko's battery chart gives 2–3 years of battery life for these calibres. Seiko, Pulsar, Lorus and Alba calibres share the chart.

  • 2G28
  • 2G78
  • 5421
  • V236
  • V810
  • V811
  • Y591
  • YS30
All 9 calibres
  • YS31

Questions

What is the 319 battery equivalent?

SR527SW, V319, 615, 280-60, SB-AE, SR527, SR64 name the same 5.8 × 2.7 mm silver oxide cell as 319. Any maker's cell under one of these codes fits.

Is 379 the same as 319?

No. SR521SW is 0.55 mm thinner than SR527SW. Same 5.8 mm diameter, but SR521SW is 2.15 mm against 2.7 mm: the contact spring may not reach it.

Is LR527 the same as SR527SW?

No: LR527 is an alkaline cell of the same size, SR527SW is silver oxide. Fits, but LR527 is alkaline and runs shorter. Same 5.8 mm × 2.7 mm size. LR527 is an alkaline (L) cell; the watch is made for silver oxide (S). Use it to get the watch going, then fit SR527SW.

What watches use the 319 battery?

In our base: 9 Seiko calibres (2G28, 2G78, 5421, V236…). The full lists are on this page, with the brand tables they come from.

How long does a 319 battery last in a watch?

Seiko's battery chart gives 2 to 3 years for its 9 calibres on this cell, 2 years most often. Life depends on the calibre's current draw, not on the cell alone.

Seiko battery chart[5]

Sources

Documents checked · Report a wrong number

  1. 1Murata — Watch Battery Selection Guide / Cross Reference · pdf · read
  2. 2Energizer Holdings, Inc. — Product datasheet ENERGIZER 319 · pdf · read
  3. 3Murata Manufacturing Co., Ltd. — Watch Battery Selection Guide / Cross Reference (1 page) · pdf · read
  4. 4WatchBattery (UK) Ltd — Watch Battery Cross Reference Table · html · read
  5. 5Seiko Watch Corporation (service information) — Value Checking List / Battery No. Cross-reference Chart · pdf · read