My brother's watch lasted a decade on the original battery, and these batteries are tiny, so I'm just wondering.... how long with a big enough battery could one last? : r/casio
Amazon.com: Duracell 364 Silver Oxide Button Battery, 1 Count Pack, 364 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household
Amazon.com: SAMSUNG Galaxy Watch Active 2 (40mm, GPS, Bluetooth) Smart Watch with Advanced Health Monitoring, Fitness Tracking, and Long lasting Battery, Pink Gold (Renewed) : Cell Phones & Accessories
How Long Do Watch Batteries Last? All You Need to Know | Durability Matters
New Long-Lasting Battery Life 230mAh Capacity Multi-Language Function Heart Rate Blood Pressure, Blood Oxygen, H60 Smart Watch - China Smart Watch and Watch price | Made-in-China.com