The Gear Battery bar display (which I hate) appears with five bars. Logically, one would think each represents 20% of the total battery. I am using this on a 12-speed di2. Typically I can get two six-hour rides using one "bar" or with 20% of the battery. However, today I started a ride showing 3 bars and so 60% of the battery available (perhaps 50% depending on when the bar drops). Early in the ride it dropped from 3 bars to 2 bars---now in red with a warning message about "low" battery. This has happened before but at the end of a ride. I assumed that I had at the very least 40% left. However, four hours later it dropped from 2 bars to 1 bar with another warning message about "critical" battery. This would not make sense unless these bars are not all 20%. Does anyone know for sure? My guess is that 2 bars actually means 25% and that 1 bar means 15 or maybe 10%. This would be in alignment with those warning messages I get with the Garmin Radar.
