Casio Men's 10-Year Battery Sport Watch, Black/Red MW600F-4AV - Walmart.com
How To Change Battery with AC Reset a CASIO G-Shock GA-100CF Watch | SolimBD | DIY | How To Change Battery with AC Reset a CASIO G-Shock GA-100CF Watch | SolimBD
UltraLast Lithium-Ion Battery for Select Casio Cell Phones CEL-BTR771B - Best Buy
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