L736 vs LR41: Same Alkaline Size?

Are L736 and LR41 interchangeable?

Treat as interchangeable alkaline labels; prefer SR41/392 for watches.

Shop by a fresh name-brand pack of the same outline. The retail prefix (DL, ECR, AG, A76) is usually a label, not a new size. Confirm voltage and chemistry before you treat any “almost the same” listing as a drop-in.

How the size code works (L736 vs LR41)

Coin and button codes are rulers, not brand slogans. The letters mark chemistry class. The digits encode size. L736 measures 7.9 × 3.6 mm; LR41 measures 7.9 × 3.6 mm. Once you read the code that way, LR41 vs L736 stops looking like a preference and starts looking like a fit check.

Can I use a L736 instead of a LR41?

Usually yes. L736 and LR41 belong in the same holder class when voltage, chemistry, and outline match. Use a fresh name-brand pack.

If the spent cell said LR41, L736 is the correct replacement only when the spec table shows the same size and voltage. A similar prefix (LIR, ML, BR, 14500) is not this swap.

Can I use a LR41 instead of a L736?

Usually yes — it is the same pair in the other order. LR41 vs L736 does not change fit or voltage.

Buy the fresher authentic pack. Counterfeit retail wrappers are a bigger risk than the extra letter on the can.

Brand labels and aliases

Retail packs hide the IEC size behind house codes. L736 also appears as LR736, SG3. LR41 also appears as AG3. Those prefixes do not change the outline unless the chemistry letters change (BR, LIR, ML, PR).

How to identify L736 versus LR41

You do not need a full datasheet to settle L736 vs LR41. 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.

1. Read the code on the old cell: L736, LR41, and the brand prefixes that map to each one.
2. If the print is worn off, check the tray, battery door, or user manual before buying.
3. Measure diameter if the codes are gone: L736 is 7.9 mm; LR41 is 7.9 mm.
4. Measure thickness: L736 is 3.6 mm; LR41 is 3.6 mm.
5. Buy the matching code. Extra capacity or a thicker can only helps when the holder is built for that cell.

Compatibility and substitution

If the device is a watch, consider upgrading chemistry rather than debating L736 vs LR41 branding.

Do not stack cells, grind a can, or use foil as a permanent spacer to fake LR41 with L736. Read the stamp, then the spec table. If the door will not close without force, you have the wrong height or diameter.