LR41 vs AG3
Closest matchSize, nominal voltage, and chemistry match. Confirm drain rating, terminals, polarity, and the exact code before replacing.
7.9mm × 3.6mm Battery Equivalents
6 model(s) use the same nominal 7.9mm × 3.6mm outline. They span 1.4, 1.5, 1.55V and Alkaline, SilverOxide, ZincAir, so physical fit alone does not prove that one can safely replace another. Compare the printed code, voltage, chemistry, and device requirements before buying.
Same-size model comparison
| Model | Voltage | Chemistry | Capacity | Nominal size | Common labels |
|---|---|---|---|---|---|
| LR41 | 1.5V | Alkaline | 25–35 mAh | 7.9mm × 3.6mm | AG3 |
| AG3 | 1.5V | Alkaline | 25–35 mAh | 7.9mm × 3.6mm | — |
| L736 | 1.5V | Alkaline | 25–35 mAh | 7.9mm × 3.6mm | LR736, SG3 |
| SR41 | 1.55V | SilverOxide | 40–55 mAh | 7.9mm × 3.6mm | 392, 384 |
| SR736SW | 1.55V | SilverOxide | 40–55 mAh | 7.9mm × 3.6mm | — |
| PR41 | 1.4V | ZincAir | 160–200 mAh | 7.9mm × 3.6mm | 312A, PR41, BROWN312, DA312 |
Which same-size batteries can replace each other?
The checks below compare each pair by size, voltage, and chemistry. “Closest match” still requires confirmation of drain rating and terminals; “conditional” means the device manual decides; a voltage mismatch means the pair must not be substituted.
LR41 vs L736
Closest matchSize, nominal voltage, and chemistry match. Confirm drain rating, terminals, polarity, and the exact code before replacing.
LR41 vs SR41
ConditionalThe nominal voltage and size are close, but Alkaline and SilverOxide have different discharge behavior. Follow the device specification.
LR41 vs SR736SW
ConditionalThe nominal voltage and size are close, but Alkaline and SilverOxide have different discharge behavior. Follow the device specification.
LR41 vs PR41
Do not substitute1.5V and 1.4V are different electrical classes. Matching dimensions do not make them interchangeable.
AG3 vs L736
Closest matchSize, nominal voltage, and chemistry match. Confirm drain rating, terminals, polarity, and the exact code before replacing.
AG3 vs SR41
ConditionalThe nominal voltage and size are close, but Alkaline and SilverOxide have different discharge behavior. Follow the device specification.
AG3 vs SR736SW
ConditionalThe nominal voltage and size are close, but Alkaline and SilverOxide have different discharge behavior. Follow the device specification.
AG3 vs PR41
Do not substitute1.5V and 1.4V are different electrical classes. Matching dimensions do not make them interchangeable.
L736 vs SR41
ConditionalThe nominal voltage and size are close, but Alkaline and SilverOxide have different discharge behavior. Follow the device specification.
L736 vs SR736SW
ConditionalThe nominal voltage and size are close, but Alkaline and SilverOxide have different discharge behavior. Follow the device specification.
L736 vs PR41
Do not substitute1.5V and 1.4V are different electrical classes. Matching dimensions do not make them interchangeable.
SR41 vs SR736SW
Closest matchSize, nominal voltage, and chemistry match. Confirm drain rating, terminals, polarity, and the exact code before replacing.
SR41 vs PR41
Do not substitute1.55V and 1.4V are different electrical classes. Matching dimensions do not make them interchangeable.
SR736SW vs PR41
Do not substitute1.55V and 1.4V are different electrical classes. Matching dimensions do not make them interchangeable.
How to measure a battery with calipers
Battery dimensions are nominal and small manufacturing tolerances are normal. Dirt, a bent wrapper, raised terminals, or squeezing the jaws can shift a reading by a few tenths of a millimeter. Use the code on the old cell as the primary identifier and measurements as a check.
- Remove the battery and wipe the faces and edge clean. Do not measure it inside the holder.
- Close and zero the digital calipers, then measure the widest diameter without squeezing.
- Measure body thickness across the flat faces. Avoid raised button terminals or welded tabs.
- Repeat each measurement after rotating the cell. Treat about ±0.1–0.2 mm as normal measuring variation.
- Finally confirm the printed voltage and chemistry. Never select a replacement from dimensions alone.
Related battery comparisons
Review record and primary sources
Reviewed by PlainBattery Technical Review Desk on 2026-08-25. Checked: shared nominal dimensions, voltage and chemistry differences, pairwise replacement guidance.
- Silver Oxide (SR) and Alkaline Button (LR) Battery Specifications — Maxell. SR/LR model dimensions, voltage, nominal capacity and drain class.
Revision record: source citations and field-level review scope added September 11, 2026. See our sources and methodology and corrections policy.