Amazon.com: Renata Batteries 393/SR754SW 1.5V Watch Battery (Pack of 3) : Health & Household
393-309TZ Energizer Battery Company | Prodotti a batteria | DigiKey
Amazon.com: Duracell 309/393 Silver Oxide Button Battery, 1 Count Pack, 309/ 393 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household