Thickness — 3.1 mm vs 5.4 mm
L1131 is 3.1 mm thick; LR44 is 5.4 mm. Holders are built for one stack height. The thinner cell loses spring pressure (“works only when I press the cover”). The thicker cell jams the door or bends the clip.
Not interchangeable
L1131 vs LR44
L1131 vs LR44: Thickness Trap
Same ~11.6 mm diameter, but LR44 is 5.4 mm thick while L1131/LR1130 is about 3 mm. A classic calculator/thermometer ordering mistake.
Last verified Aug 25, 2026
Are L1131 and LR44 interchangeable?
Not interchangeable.
A LR44 vs L1131 swap fails on thickness, capacity. If the door only closes when you force it, or the device works only while you press the cover, you have the wrong cell — not a weak spring you should ignore.
L1131 vs LR44 specs: thickness, capacity
They share 1.5 V and Alkaline and 11.6 mm diameter, which is why L1131 vs LR44 looks interchangeable on a store shelf. Highlighted rows are the ones that change the purchase: thickness, capacity.
Read physical fit before capacity. Extra milliamp-hours only help when the holder is built for that cell. A “better” spec in the wrong tray is a mechanical or voltage mismatch, not an upgrade.
Difference between L1131 and LR44 batteries
If you searched LR44 vs L1131, you are on the same comparison with the names reversed. The difference between L1131 and LR44 batteries is not the word “vs” — it is the specs that do not match after you ignore the similar photos.
Capacity — 70–80 mAh vs 110–130 mAh
Typical L1131 capacity is 70–80 mAh. LR44 is 110–130 mAh. Runtime only follows that gap inside the correct holder. Extra capacity in the wrong tray does not last longer — it often does not run at all.
Shared diameter ~11.6 mm
Shared diameter ~11.6 mm
Height ~3 mm vs 5.4 mm
Height ~3 mm vs 5.4 mm
How the size code works (L1131 vs LR44)
Coin and button codes are rulers, not brand slogans. The letters mark chemistry class. The digits encode size. L1131 measures 11.6 × 3.1 mm; LR44 measures 11.6 × 5.4 mm. Once you read the code that way, LR44 vs L1131 stops looking like a preference and starts looking like a fit check.
Can I use a L1131 instead of a LR44?
Usually no. L1131 is 11.6 × 3.1 mm at 1.5 V (Alkaline). LR44 is 11.6 × 5.4 mm at 1.5 V (Alkaline). Those are not the same part.
If the spent cell or tray said LR44, specify that code. Forcing L1131 can crack a cover, lose contact, or apply the wrong voltage.
Can I use a LR44 instead of a L1131?
Usually no. Going the other way does not fix a diameter, thickness, or voltage miss. LR44 in a L1131 holder has the same problem with the names flipped.
If you arrived from a LR44 vs L1131 search, stay on this page. The answer does not change.
Brand labels and aliases
Retail packs hide the IEC size behind house codes. L1131 also appears as LR1131, SG10. LR44 also appears as AG13, A76, LR1154. Those prefixes do not change the outline unless the chemistry letters change (BR, LIR, ML, PR).
How to identify L1131 versus LR44
You do not need a full datasheet to settle L1131 vs LR44. You need the stamp, the tray, or a cheap pair of calipers. A store bin labeled only “button cell” or “3V lithium” will not do that work for you.
- Read the code on the old cell: L1131, LR44, and the brand prefixes that map to each one.
- If the print is worn off, check the tray, battery door, or user manual before buying.
- Measure diameter if the codes are gone: L1131 is 11.6 mm; LR44 is 11.6 mm.
- Measure thickness: L1131 is 3.1 mm; LR44 is 5.4 mm.
- Buy the matching code. Extra capacity or a thicker can only helps when the holder is built for that cell.
Choose L1131 when…
- Device needs the thin LR1130/AG10/L1131 cell
Choose LR44 when…
- Device needs LR44/AG13
Compatibility and substitution
If the battery cover will not sit flush, you probably bought LR44 for an L1131 tray.
Do not stack cells, grind a can, or use foil as a permanent spacer to fake LR44 with L1131. Read the stamp, then the spec table. If the door will not close without force, you have the wrong height or diameter.
L1131 vs LR44 FAQ
Why do stores show them as related?
Same diameter family. Thickness is the specification that actually matters here.
I searched LR44 vs L1131 — is this the right page?
Yes. L1131 vs LR44 and LR44 vs L1131 are the same pair. Fit, voltage, and chemistry do not change when you flip the order.
Should I always trust a cross-reference chart?
Use this guide as a starting point, then confirm voltage, chemistry, and physical size with your device manual or the marking on the old cell.
Review record and primary sources
Reviewed by PlainBattery Technical Review Desk on 2026-08-25. Checked: both model identities and dimensions, voltage and chemistry differences, physical fit, interchangeability conclusion and safety warnings.
- Energizer A76 / IEC LR44 Product Datasheet — Energizer Holdings, EBC-4407F. LR44/A76 dimensions, voltage, capacity test conditions and discharge curve.
- 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.