LR41 Batteries

LR41 Batteries: How to Choose and Use

LR41 batteries are compact 1.5V alkaline button cells commonly used in small, low‑drain electronics. This guide explains specs, compatible equivalents, when to choose LR41 vs SR41, estimated runtimes, and safe handling.

Key Specifications

Chemistry	Alkaline (zinc–manganese dioxide)
Nominal voltage	1.5V
Typical capacity	~25–32 mAh (varies by brand and load)
Size	7.9 mm diameter × 3.6 mm height
IEC / Other codes	LR41, LR736, L736, AG3, G3A, 192, V36A
Operating temp	~14–140°F (−10 to +60°C)
Weight	<1 g

Note: SR41/392/384 are the same size but use silver-oxide chemistry with different performance (see below).

Common Uses

• Digital thermometers and medical pens (check your manual)
• Calculators and small toys
• Laser pointers and keychain/pen lights
• Basic wristwatches and stopwatches

Hearing aids typically use zinc‑air sizes (10, 312, 13, 675), not LR41.

LR41 vs. SR41 (392/384) — Which to Choose?

• Choose LR41 (alkaline) if you need a low-cost option for low‑drain or intermittent‑use devices (toys, calculators, some thermometers). Expect a gradual voltage drop as the cell discharges.
• Choose SR41 / 392 / 384 (silver‑oxide) for precision or continuous‑use devices (watches, instruments) where stable voltage and longer life matter. Typically costs more but lasts longer.

If your device specifies silver‑oxide, use SR41/392 for optimal performance.

Estimated Runtime Examples

• Basic wristwatch: LR41 ~3–12 months; silver‑oxide SR41 often 1–2+ years (usage dependent).
• Laser pointer/keychain light: ~30–90 minutes of cumulative on‑time (varies widely by LED/driver).
• Digital thermometer: dozens to hundreds of readings depending on model and backlight.

Actual runtime varies with device current draw, ambient temperature, and storage age.

Buying Tips

• Check the code match: LR41/AG3/LR736 for alkaline; SR41/392/384 for silver‑oxide.
• Look for fresh stock with a use‑by date 2–3 years out for best performance.
• Multipacks reduce cost; avoid mixing brands or old/new cells in the same device.

Storage and Handling

• Store at room temperature, dry, and in original packaging to prevent short circuits.
• Typical shelf life: ~2–3 years for alkaline LR41 when stored properly.
• Do not refrigerate; do not carry loose cells with metal objects.

Safety Notes

• Button battery ingestion is an emergency. Keep away from children and pets; if swallowed, seek immediate medical help and follow poison control guidance.
• Do not recharge, crush, or expose to heat.
• Tape terminals of used cells before recycling to prevent shorting.

Compatibility and Equivalents

• Size/fit equivalents (alkaline): LR41, LR736, AG3, G3A, 192, V36A. These are interchangeable within alkaline chemistry.
• Same size, different chemistry: SR41/392/384 (silver‑oxide). Physically compatible, but with steadier voltage and longer life.
• Some devices use 2–3 LR41 cells in series. Replace all at once and do not mix alkaline with silver‑oxide in the same device.

Disposal

Recycle button cells through local e‑waste or battery collection programs. Avoid household trash where possible.

FAQ

Are LR41 batteries rechargeable?

No. LR41 are single‑use alkaline cells and should not be recharged.

Is LR41 the same as 392?

No. They are the same size, but LR41 is alkaline (1.5V) and 392 is silver‑oxide (also 1.5V) with longer, steadier performance.

Can I substitute SR41/392 for LR41?

Usually yes if the device fits the cell; expect longer life and stable voltage. Follow the device manual if it specifies a chemistry.

How many LR41 cells does my device need?

Some products stack 2–3 cells. Check the battery compartment markings or the manual and replace the full set together.

How long do LR41 batteries last in storage?

About 2–3 years when stored cool, dry, and unopened. Buy only what you will use within that window.