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Watch battery · lithium coin

CR1220 battery

CR1220 = SB-T13. 12.51 × 2 mm1 lithium coin, 3 V1. Equivalents: ECR1220, DL1220 (4 codes in 5 code systems, full table); 54 calibres, modules and models in our base take it.

Sources checked · How we source numbers
CR1220: drawing to scaleCR1220: diameter 12.5 mm, height 2 mm.Ø 12.5−+2CR1220
CR1220: face and edge view to scale, from the datasheet sizesDrawing from data, not a photo · mm
Diameter
12.5 mm1
Height
2 mm1
Nominal voltage
3 V1
IEC designation
CR12201

CR1220 equivalents

The same cell under 4 names. Any of them fits where CR1220 does.

Code systemCR1220
IECCR12201
EnergizerCR12201
DuracellDL12202secondary source
SeikoSB-T132secondary source
Rayovac (old)ECR12202secondary source

Size and chemistry

Diameter
12.5 mm1
Height
2 mm1
Nominal voltage
3 V1
Chemistry
Lithium / Manganese Dioxide (Li/MnO2)1
IEC designation
CR12201
1.6CR12162CR12202.5CR1225
Every 12.5 mm lithium coin size with a page, edge view to scale. Only the height tells them apart.
Show CR1220 at true size (1:1)
1:1 · not calibrated: sizes are approximate
CR1220: drawing to scaleCR1220: diameter 12.5 mm, height 2 mm.Ø 12.5−+2CR1220
01020304050

Cell types in this size

CR1220

Primary cell · Lithium / Manganese Dioxide (Li/MnO2)1

5 codes in our sources name this cell type.

Capacity by manufacturer

Energizer CR1220CR1220

37 mAh1capacity to 2.0 V cut-offDatasheet ↗

Can I use another cell instead of CR1220?

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

Check any other pair

  • Use instead of CR1220

    CR1216

    No

    No: CR1216 is 0.4 mm thinner than CR1220.

    Same 12.5 mm diameter, but CR1216 is 1.6 mm against 2 mm: the contact spring may not reach it.

    CR1216: 12.5 mm3 × 1.6 mm3, 3 V3

    Draw both cells in the swap checker

  • Use instead of CR1220

    CR1225

    No

    No: CR1225 is 0.5 mm taller than CR1220.

    Same 12.5 mm diameter, but CR1225 stands 2.5 mm against 2 mm: the case back presses on it or does not close.

    CR1225: 12.5 mm4 × 2.5 mm4, 3 V4

    Draw both cells in the swap checker

What uses CR1220

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

Seiko calibres4[5]

Seiko's battery chart gives 5–7 years of battery life for these calibres. Seiko, Pulsar, Lorus and Alba calibres share the chart.

  • W205
  • W206
  • W401
  • Y731

Casio modules4[6]

187 Casio models in Casio's manual index sit on these modules.

Watches with a page2

Warnings from the makers

Keep away from children

“KEEP OUT OF REACH OF CHILDREN. Swallowing may lead to”[1]
“serious injury or death in as little as 2 hours due to chemical burns and”[1]

Questions

What is the CR1220 battery equivalent?

ECR1220, DL1220, SB-T13 name the same 12.5 × 2 mm lithium coin cell as CR1220. Any maker's cell under one of these codes fits.

Is CR1216 the same as CR1220?

No. CR1216 is 0.4 mm thinner than CR1220. Same 12.5 mm diameter, but CR1216 is 1.6 mm against 2 mm: the contact spring may not reach it.

What watches use the CR1220 battery?

In our base: 4 Seiko calibres (W205, W206, W401, Y731…); 187 Casio models. The full lists are on this page, with the brand tables they come from.

How long does a CR1220 battery last in a watch?

Seiko's battery chart gives 5 to 7 years for its 4 calibres on this cell, 7 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. 1Energizer Holdings, Inc. — Product datasheet ENERGIZER CR1220 · pdf · read
  2. 2WatchBattery (UK) Ltd — Watch Battery Cross Reference Table (rows re-extracted from HTML this session) · html · read
  3. 3Energizer Holdings, Inc. — Product datasheet ENERGIZER CR1216 · pdf · read
  4. 4Energizer Holdings, Inc. — Product datasheet ENERGIZER CR1225 · pdf · read
  5. 5Seiko Watch Corporation (service information) — Value Checking List / Battery No. Cross-reference Chart · pdf · read
  6. 6Casio Computer Co., Ltd. — Watch manual search JSON (US locale), manual_search.support.json · json · read