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Battery

SR41

1.55V silver oxide button cell

SR41 is a 1.55V silver-oxide button cell (about 7.9 × 3.6 mm). Packs often say 392 or 384. Benevo UltraPen takes two SR41 cells. Some meters (e.g. Rossmax TG380) allow SR41 or LR41 — read the OEM quote. LR41 / AG3 fit the same size but are alkaline — see SR41 vs LR41.

Chemistry
silver_oxide
Voltage
1.55 V
Diameter
7.9 mm
Thickness
3.6 mm
Used by
2 devices

Common uses: Watches · Instruments

SR41 battery reference render

SR41 Diagram

SR41 orthographic diagram with top, bottom or end views and side profile dimensions
Brand-neutral outline — confirm the tray in your device.

Other names

Genuine aliases and pack labels for this battery — not substitutes of a different chemistry.

392 · 384 · SR41SW · SR41W · D392 · V392

Related codes

Same battery / other names

SR41392

Same battery

Same battery, different label.

SR41384

Same battery

Same battery, different label.

SR41D392

Same battery

Same battery, different label.

SR41V392

Same battery

Same battery, different label.

SR41SR41W

Same battery

Same battery, different label.

SR41SR41SW

Same battery

Same battery, different label.

Same size, different battery

SR41LR41

Same size, different type

Fits the same slot. Different type — check the manual.

Rechargeables are not equivalents

Do not substitute a rechargeable cell unless the device documentation explicitly allows it. Silver-oxide and lookalike chemistries are not interchangeable with rechargeables by size alone.

Size family

Edge thickness in the 7.9 mm family — thicker bar means thicker cell. Not to scale. Highlighted cell is this page.

LR41
3.6 mm
SR41
3.6 mm
ZA312
3.6 mm
ZA13
5.4 mm

Device-specific caveats

From manufacturer-backed notes on devices that use SR41 — not generic advice.

  • Medical device: button-cell swallowing hazard — keep cells away from children.

Devices using SR41

1 / 2
All (2)Styluses & pens (1)Health meters (1)

Used in

Styluses & pens1 deviceHealth meters1 device

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Testers & chargers

Optional tools that fit this cell type — only where the chemistry allows. Separate from the battery answer.

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Buy links are optional and separate from the battery answer.

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