I made a datafield to show status of both Bontrager light. Flare RT in the back and Ion in the front.
I notticed that when I discharge the battery of rear light to the point that it turns off after charing the battery it still reports empty battery.
It reports empty battery through ANT+ and also the red led lights up. When I reset the lamp (15 s to turn off ANT+ and again 15s to turn it on) battery status is correct.
Does anyone have this light and can confirm it? Maybe my unit is faulty however it seems like a firmware bug.
You have to drain the battery and the connect it to charger. When the green light shows up, disconnect the power.
After that when turning the light on you should see blue and then red led (instead of green)
I tried to contact Bontrager/Trek but after initial response I didn't get any answer.