A few months ago when I plugged in my Forerunner 55 to charge it suddenly jumped to 100%, then didn't show any drainage till I got a critically low alert. I let it drain totally to restart the device. Since then it's happened again a few times, not necessarily when charging - the watch just randomly decides it's at 100%. I've let it drain totally to restart a few times.
Today when plugged in to charge I noticed it showed two different battery levels, the watch face says 48% while the charging icon shows 43%, and as the charge increases the difference remains. So clearly there's a glitch in how the battery "talks" to the watch? What can I do?
It's less than 1 year old.