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
A158WA-1 | Vintage Silver Stainless Steel Metal Watch | CASIO
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Montre à quartz numérique vintage Casio W 210 Illuminator - Etsy France
BUY Casio Alarm 50M 10 Year battery Digital Watch W-210-1CV, W210 - Buy Watches Online | CASIO AUS Watches
First battery change for the AW158 after 11 years : r/casio