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Watch battery · rechargeable

TS920E battery

TS920E. 9.51 × 2 mm1 rechargeable, 1.5 V1. Rechargeable: replace it only with the same type.

Sources checked · How we source numbers
TS920E: drawing to scaleTS920E: diameter 9.5 mm, height 2 mm.Ø 9.5−+2TS920E
TS920E: face and edge view to scale, from the datasheet sizesDrawing from data, not a photo · mm
Diameter
9.5 mm1
Height
2 mm1
Nominal voltage
1.5 V1
IEC designation
not listed

TS920E equivalents

Our sources list TS920E under its maker's code only; a rechargeable cell has no primary equivalent.

Code systemTS920Erechargeable
SeikoTS920E1

Size and chemistry

Diameter
9.5 mm1
Height
2 mm1
Nominal voltage
1.5 V1
Chemistry
Lithium Rechargeable Battery1
IEC designation
not listed
2CTL920F2MT9202TS920E
Every 9.5 mm rechargeable size with a page, edge view to scale. Only the height tells them apart.
Show TS920E at true size (1:1)
1:1 · not calibrated: sizes are approximate
TS920E: drawing to scaleTS920E: diameter 9.5 mm, height 2 mm.Ø 9.5−+2TS920E
01020304050

What uses TS920E

No calibre, module or model in our base names TS920E yet.

Cell types in this size

TS920E

Rechargeable · Lithium Rechargeable Battery1

1 code in our sources names this cell type.

Capacity by manufacturer

Seiko Instruments TS920ETS920E

5.5 mAh1nominal capacity to 1.0 V cut-off at 2.3 V charge; 1000 cycles at 20% DoD, 50 cycles at 100% DoD (quoted in notes)Datasheet ↗

Can I use another cell instead of TS920E?

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

Check any other pair

  • Use instead of TS920E

    MT920

    No

    No: MT920 and TS920E are different rechargeable systems.

    TS920E is rechargeable, 1.5 V; MT920 is manganese-titanium rechargeable, 1.5 V. Use the type printed on the old cell or in the maker's table.

    MT920: 9.5 mm2 × 2 mm2, 1.5 V2

    Draw both cells in the swap checker

  • Use instead of TS920E

    SR920SW

    Never

    Never: TS920E is rechargeable, SR920SW is not.

    TS920E is a rechargeable cell that the watch charges from its solar panel or generator. SR920SW is a primary silver oxide cell, not made to be charged. Replace it only with the same rechargeable type.

    SR920SW: 9.5 mm3 × 2.05 mm3 Sources disagree: manufacturer 2.05 mm / secondary source 2 mm4, 1.55 V3

    Draw both cells in the swap checker

Warnings from the makers

Keep away from children

“It is dangerous if children swallow the battery.”[1]

Charging current is limited

“A resistor must be inserted to regulate the charging current, because our rechargeable batteries have a limit for charging”[1]

Questions

Can I replace TS920E with a regular battery?

No. TS920E is a rechargeable cell that the watch charges from its solar panel or generator. SR920SW is a primary silver oxide cell, not made to be charged. Replace it only with the same rechargeable type.

Sources

Documents checked · Report a wrong number

  1. 1Seiko Instruments Inc. (SII) — Micro Battery catalogue, MicroBattery_E (rev05, file dated 2023-03-30) · pdf · read
  2. 2Panasonic Energy Co., Ltd. — MT920 datasheet (EN) · 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