I have owned a GR8900-1 for about 6 months now. It functions properly, has shown a constant charge level at H and is power save enabled - until an hour ago.
Here is the confusion... Part of my routine is a floor exercise that needs the CDT function. I set it at one minute to do the Plank and started the timer. I checked the time that I had left remaining (tough exercise) and the display was blank! I then pressed a button and the display came back on with CHG flashing. So, off it went to a nearby window where it is now charging. Can someone explain what happened? Do you think this can happen once again? Thank you for your help.