Referência cruzada de pilhas de botão (AG/LR/SR/CR)

A tabela completa AG→LR→SR→IEC e quando os equivalentes NÃO são intercambiáveis.

Button cells use several naming systems for the same size: AG/LR/SR retail codes, IEC designations (LR44, SR626, CR2032), and brand codes (Varta, Duracell, Energizer). Example: AG13 = LR44 = A76 = 357 = SR44 are the 11.6 × 5.4 mm family — LR44 alkaline and SR44 silver-oxide are interchangeable in size but differ in discharge curve.

Rule one: match chemistry for precision requirements — silver-oxide (SR) for watches and medical meters, alkaline (LR) for low-drain toys and scales, lithium (CR) for key fobs and CMOS backup (3V, never substitute with 1.5V).

Rule two: match thickness. CR2032 (3.2 mm) and CR2025 (2.5 mm) are both 20 mm diameter — a thicker cell may not close, a thinner one loses contact.

For retailer assortments we supply mixed-size cross-reference card sets with your brand — each card maps AG/LR/SR to IEC codes so the consumer cannot buy the wrong size.