Amazon.com: 2 x MAXELL SR626SW 377 1.55v Silver Oxide Button Cell Watch Battery - Official Genuine Maxell : Health & Household
Amazon.com: Duracell 376/377 Silver Oxide Button Battery, 2 Count Pack, 376/ 377 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household