![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 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)
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
![Amazon.com: Casio Illuminator 10-Year Battery Extra Long Strap 100 M Water Resistance 5-Alarm w/Countdown Timer Men's Digital Watch, Green, AE-1500WHX-3AVCF : Clothing, Shoes & Jewelry Amazon.com: Casio Illuminator 10-Year Battery Extra Long Strap 100 M Water Resistance 5-Alarm w/Countdown Timer Men's Digital Watch, Green, AE-1500WHX-3AVCF : Clothing, Shoes & Jewelry](https://m.media-amazon.com/images/I/71+dXGAzy3L._AC_UY1000_.jpg)