I own both the 1A9 and RD-4A, GWG-1000. Both are stored adjacent to a window and are provided plenty of light. Today I noticed the 1A9 had the hour and minute hands at 12 and in the display “CHARGE” was blinking. The RD-4A was fine. I placed the watch in open sunlight and after a couple hours it was proving the time and date but were incorrect.
My question is does this mean the battery is loosing its ability to hold a charge? I assume with the proper charge, the time and date will be corrected tonight as the watch spent about 8 hours in sunlight today.
Thanks in advance for and information.