![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 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](https://preview.redd.it/zzadwac6xie61.jpg?width=640&crop=smart&auto=webp&s=e884b68a72f7306165c286389c066e24de3d48bc)
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
![Casio Men's 10-Year Battery Japanese Quartz Watch with Resin Strap, Black, 21 (Model: AE-1200WH-5AVCF) - Walmart.com Casio Men's 10-Year Battery Japanese Quartz Watch with Resin Strap, Black, 21 (Model: AE-1200WH-5AVCF) - Walmart.com](https://i5.walmartimages.com/seo/Casio-Men-s-10-Year-Battery-Japanese-Quartz-Watch-with-Resin-Strap-Black-21-Model-AE-1200WH-5AVCF_46950b17-29cc-4fd9-ada4-a2ace2b76765.e21fe64e0d5b2784233e2f469bdcb5a7.jpeg?odnHeight=2000&odnWidth=2000&odnBg=FFFFFF)
Casio Men's 10-Year Battery Japanese Quartz Watch with Resin Strap, Black, 21 (Model: AE-1200WH-5AVCF) - Walmart.com
![Casio Multi-Function Dual Time 10 Year Battery Steel Band Watch A178WGA-1AV New 4971850759430 | eBay Casio Multi-Function Dual Time 10 Year Battery Steel Band Watch A178WGA-1AV New 4971850759430 | eBay](https://i.ebayimg.com/images/g/wkMAAOSwIodfOa0q/s-l1200.jpg)
Casio Multi-Function Dual Time 10 Year Battery Steel Band Watch A178WGA-1AV New 4971850759430 | eBay
![Amazon.com: Casio Men's Heavy Duty 10-Year Battery Date Indicator Watch (Model: MW610H-4AV) (Black/Red) : Clothing, Shoes & Jewelry Amazon.com: Casio Men's Heavy Duty 10-Year Battery Date Indicator Watch (Model: MW610H-4AV) (Black/Red) : Clothing, Shoes & Jewelry](https://m.media-amazon.com/images/I/81p0Md+a0vL._AC_UY1000_.jpg)
Amazon.com: Casio Men's Heavy Duty 10-Year Battery Date Indicator Watch (Model: MW610H-4AV) (Black/Red) : Clothing, Shoes & Jewelry
![Casio watch. Had it for ~20yrs. It died today but I just replaced the battery and it's back again! I had only changed batteries twice: 10 yrs ago and today. Truly BIFL Casio watch. Had it for ~20yrs. It died today but I just replaced the battery and it's back again! I had only changed batteries twice: 10 yrs ago and today. Truly BIFL](https://preview.redd.it/df7p5fv0muz71.jpg?width=3024&format=pjpg&auto=webp&s=1faa361bd4e3e449bebfd7a93464dff20375e32a)