My 830 has started to display strangely high battery levels. For example, after a long ride, it shows 80% when previously it would have dropped to 50% ish. Also, it used to turn off when charging was complete and it reached 100%. Now it sits there displaying 100% until I unplug it from the wall charger.
I had a problem with my Explore where the battery level indicator needed resetting by fully discharging. Is this similar?