LR44 vs LR44
There is no difference between an AG13 and an LR44. Both codes mark the identical 1.5 volt alkaline button cell, 11.6 mm across and 5.4 mm tall. AG13 is the generic factory numbering; LR44 is the IEC standard name. A76, L1154, LR1154, 157 and GPA76 are the same cell again.
| LR44 | LR44 | |
|---|---|---|
| Chemistry | Alkaline (Zn/MnO2) | Alkaline (Zn/MnO2) |
| Voltage | 1.5 V | 1.5 V |
| Diameter | 11.6 mm | 11.6 mm |
| Height | 5.4 mm | 5.4 mm |
| Capacity | 110-130 mAh | 110-130 mAh |
| Also sold as | AG13, A76, L1154, LR1154 | AG13, A76, L1154, LR1154 |
The AG system (AG0 through AG13) is an informal numbering that low-cost Asian manufacturers stamp on alkaline button cells, while LR44 follows the IEC convention: L for alkaline chemistry, R for round, 44 as a size index. Big brands print LR44 or their own catalog codes (Energizer A76, Duracell 76A); bulk multipacks say AG13. The batteries inside are functionally identical, allowing for normal quality differences between manufacturers.
The only meaningful choice in this size is alkaline versus silver oxide. Any cell marked SR44, 357 or 303 is the silver-oxide version: same dimensions, steadier 1.55 volt output, roughly double the capacity, better for watches and instruments. So treat AG13-or-LR44 as one decision already made, and spend your attention on whether the device deserves the silver upgrade.