HOW TO change your battery on a G-Shock watch - YouTube
Casio g-shock battery retainer, possible repairs? - Watch Repairs Help & Advice - Watch Repair Talk
Battery replacement- Any suggestion on how to replace the batteries for my Gshock. Is it advisable to change it myself or from an authorized store? : r/gshock
GA110-1B | Analog-Digital Black Men's Watch G-SHOCK | CASIO