LR41 vs LR44
LR41 (AG3/L736) is 7.9 × 3.6 mm. LR44 (AG13) is 11.6 × 5.4 mm. Both are alkaline button cells — and that is where the similarity ends.
Last verified Aug 25, 2026
Not interchangeable.
A LR44 vs LR41 swap fails on diameter, 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.
They share 1.5 V and Alkaline, which is why LR41 vs LR44 looks interchangeable on a store shelf. Highlighted rows are the ones that change the purchase: diameter, 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.
If you searched LR44 vs LR41, you are on the same comparison with the names reversed. The difference between LR41 and LR44 batteries is not the word “vs” — it is the specs that do not match after you ignore the similar photos.
LR41 is 7.9 mm across; LR44 is 11.6 mm. That gap is enough for one cell to miss the clip entirely or rattle in the other tray. IEC codes put diameter in the first digits for a reason: you cannot sand a coin cell down to fit.
LR41 is 3.6 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.
Typical LR41 capacity is 25–35 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.
Height 3.6 mm vs 5.4 mm
AG3 ≠ AG13 — easy retail mix-up
Silver oxide upgrades differ too (392/SR41 vs 357/SR44)
Coin and button codes are rulers, not brand slogans. The letters mark chemistry class. The digits encode size. LR41 measures 7.9 × 3.6 mm; LR44 measures 11.6 × 5.4 mm. Once you read the code that way, LR44 vs LR41 stops looking like a preference and starts looking like a fit check.
Usually no. LR41 is 7.9 × 3.6 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 LR41 can crack a cover, lose contact, or apply the wrong voltage.
Usually no. Going the other way does not fix a diameter, thickness, or voltage miss. LR44 in a LR41 holder has the same problem with the names flipped.
If you arrived from a LR44 vs LR41 search, stay on this page. The answer does not change.
Retail packs hide the IEC size behind house codes. LR41 also appears as AG3. LR44 also appears as AG13, A76, LR1154. Those prefixes do not change the outline unless the chemistry letters change (BR, LIR, ML, PR).
You do not need a full datasheet to settle LR41 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.
If the cell rattles or sits crooked, you almost certainly have the wrong AG/LR number.
Do not stack cells, grind a can, or use foil as a permanent spacer to fake LR44 with LR41. Read the stamp, then the spec table. If the door will not close without force, you have the wrong height or diameter.
No. AG13 is much wider and will not fit an LR41 compartment.
Yes. LR41 vs LR44 and LR44 vs LR41 are the same pair. Fit, voltage, and chemistry do not change when you flip the order.
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.
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.
Revision record: source citations and field-level review scope added September 11, 2026. See our sources and methodology and corrections policy.
