LR44 vs AG13
AG13 is the generic designation for the alkaline LR44 — the same 11.6 × 5.4 mm cell at 1.5 V and 110–130 mAh.
Last reviewed
Same battery, two names. LR44 is the international standard code for this alkaline button cell; AG13 is the generic number used mostly on budget and unbranded multipacks. Same 1.5 volts, same 11.6 × 5.4 mm, same chemistry. They swap freely.
- Verdict:
- The same cell — AG13 is the generic code for an LR44
- Interchangeable:
- yes — the same cell under two codes
Side-by-side specifications
| Specification | LR44 | AG13 |
|---|---|---|
| Chemistry | Alkaline | Alkaline |
| Type | Button Cell | Button Cell |
| Nominal voltage | 1.5 V | 1.5 V |
| Diameter | 11.6 mm | 11.6 mm |
| Height | 5.4 mm | 5.4 mm |
| Typical capacity | 110–130 mAh | 110–130 mAh |
| Rechargeable | No | No |
| Also sold as | AG13, A76, L1154, 157 | LR44, A76, L1154, 357A |
Size comparison
Both cells share an identical 11.6 × 5.4 mm footprint, so physical fit is not the deciding factor here.
Why two codes exist
LR44 is the IEC standard name: L for alkaline, R for round. AG13 comes from the generic numbering used across low-cost manufacturing, where AG simply counts button cell sizes upward.
What actually differs
Brand and quality control, not specification. AG-coded cells are typically unbranded imports sold in strips, and both capacity within the 110–130 mAh band and shelf life vary more than they would between named brands.
Not the silver oxide one
AG13 is alkaline at 1.5 V. The silver oxide cell in the same shell is the SR44 or 357 at 1.55 V — a different cell, not another name for this one.
Where AG numbering comes from
The AG series is a generic sizing scheme used across low-cost manufacturing rather than a standards-body designation. AG13 is simply the thirteenth size in that run, and it maps onto the IEC LR44. No organisation polices it, which is why quality varies more within AG-coded cells than within branded LR44s.
What to expect from a cheap strip
AG13s are usually sold ten or twenty to a card for very little. The specification is the same 1.5 V and 11.6 × 5.4 mm, but capacity within the 110–130 mAh band, shelf life and leak resistance are where the corners get cut. For a toy that is a fair trade; for a device you would rather not open again, it is not.
The silver oxide trap
Some listings market AG13 and 357 as equivalents because they share a size. They do not share a chemistry: AG13 is alkaline at 1.5 V, 357 is silver oxide at 1.55 V. In a watch or a meter that distinction is the whole point, so treat a listing that conflates them as one to avoid.
Can I use an AG13 instead of an LR44?
Yes. The LR44 and the AG13 are the same cell — 11.6 × 5.4 mm, 1.5 V, alkaline. The two codes come from different naming schemes, not from different batteries, so whichever you find on the shelf will work.
Check before you swap. Batteries with similar dimensions are not always interchangeable. Always verify voltage, chemistry and the requirements printed in your device manual before fitting a replacement.
LR44 vs AG13: common questions
Is the AG13 a direct replacement for the LR44?
Same battery, two names. LR44 is the international standard code for this alkaline button cell; AG13 is the generic number used mostly on budget and unbranded multipacks. Same 1.5 volts, same 11.6 × 5.4 mm, same chemistry. They swap freely.
What is the difference between the LR44 and the AG13?
AG13 is the generic designation for the alkaline LR44 — the same 11.6 × 5.4 mm cell at 1.5 V and 110–130 mAh. In short: the same cell — AG13 is the generic code for an LR44.
Are the LR44 and the AG13 the same size?
Yes. Both measure 11.6 × 5.4 mm, so either fits where the other does. Whether they are interchangeable is an electrical question, not a physical one.
Background reading
The wider questions behind these two codes.
Mostly the same words — where it matters, coin means the thin 3 V ones
Silver oxide for precision, alkaline for price
L is alkaline, S is silver oxide — the number after is the size
One size, two chemistries — the 357 and 303 are the same cell