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  1. GW-M5610BC looses charge - change battery?

    Casio G-Shock
    Hello! I have a G-Shock GW-M5610BC that I use on a daily base and love very much. However, lately it's making some trouble: although the battery indicator is on high all the time, the watch turns off and just shows a blinking "CHG" symbol about a once or twice a week. From my experience, this...
  2. [Share-How To] Change ToughSolar CTL1616 Battery On Protrek PRG-90

    Articles & Tutorials
    Hi there, I would like to share this and sorry if I POST on Article&Tutorials (G-Shock) but my model is ToughSolar Protrek PRG90. But I do hope other ToughSolar user can also get know about ToughSolar battery. Watch is PRG-90 with green rubber/resin band. Purchase on 2008. Unfortunately, the...
  3. Dirty fix for G-2800/G-7300 (module 2534) battery drain

    Articles & Tutorials
    There's been plenty of discussion here and elsewhere about the Casio G-2800 and G7300 Tough Solar watches and the issues with the CTL1616 rechargeable battery, but I've seen other people complaining of a battery drain issue on these models based on module 2534. I even remember that somebody did...
  4. GR-8900 stuck in "CHG" mode even after replacing the battery

    Casio G-Shock
    Hi guys, I got a GR-8900 with the typical problems of an empty / defective solar battery. That is: -Blank screen. -No L/M/H charge indicator. Just Blinking "CHG". -Buttons not responding. I exposed it to light for some hours. Numbers showed on screen, watch started to function. So the solar...
  5. CTL1616 changing and other technical info including datasheet

    Articles & Tutorials
    I did an article on changing the battery on my Casio ProTrek and wrote it up at this URL I also gathered together various data on the battery and so on which is shown at the link .