Literally had to replace the battery on this thing every year I've owned it, so I think it's faulty since I barely wear it and use the Bluetooth or flash anyways. What's
Amazon.com: Panasonic CTL1616 Solar Rechargeable CTL 1616 Battery Replacement Watch Cells Casio : Health & Household
Casio Gshock Tough Solar Battery Change CTL1616 Gw6900 - YouTube