AG13 vs AG3
AG13 is LR44-size (11.6 mm). AG3 is LR41/L736-size (7.9 mm). One digit in the AG code changes the entire form factor.
Last verified Aug 25, 2026
Not interchangeable — check the number after AG carefully.
A AG3 vs AG13 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 AG13 vs AG3 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 AG3 vs AG13, you are on the same comparison with the names reversed. The difference between AG13 and AG3 batteries is not the word “vs” — it is the specs that do not match after you ignore the similar photos.
AG13 is 11.6 mm across; AG3 is 7.9 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.
AG13 is 5.4 mm thick; AG3 is 3.6 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 AG13 capacity is 110–130 mAh. AG3 is 25–35 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.
AG13 ≈ LR44 (11.6 × 5.4 mm)
AG3 ≈ LR41 (7.9 × 3.6 mm)
Common checkout error on multipacks
Coin and button codes are rulers, not brand slogans. The letters mark chemistry class. The digits encode size. AG13 measures 11.6 × 5.4 mm; AG3 measures 7.9 × 3.6 mm. Once you read the code that way, AG3 vs AG13 stops looking like a preference and starts looking like a fit check.
Usually no. AG13 is 11.6 × 5.4 mm at 1.5 V (Alkaline). AG3 is 7.9 × 3.6 mm at 1.5 V (Alkaline). Those are not the same part.
If the spent cell or tray said AG3, specify that code. Forcing AG13 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. AG3 in a AG13 holder has the same problem with the names flipped.
If you arrived from a AG3 vs AG13 search, stay on this page. The answer does not change.
You do not need a full datasheet to settle AG13 vs AG3. 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 falls through or will not seat, you have the wrong AG number.
Do not stack cells, grind a can, or use foil as a permanent spacer to fake AG3 with AG13. Read the stamp, then the spec table. If the door will not close without force, you have the wrong height or diameter.
They are different standardized sizes — not scaled versions of one SKU.
Yes. AG13 vs AG3 and AG3 vs AG13 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.
No model-specific manufacturer sheet is linked yet; confirm this entry against the device manual before use.
Revision record: source citations and field-level review scope added September 11, 2026. See our sources and methodology and corrections policy.
