Originally Posted by
John_V
Can't help you there. My radar is connected to a Wahoo Bolt. I have to power it On/Off manually as well as change the modes. Mounted on my saddle bag, it's easy for me to reach without having to stop the bike. The Bolt doesn't show the current battery level but does give me a notification when the radar battery is low. I usually get another 10-12 miles on the radar time after the notification pops up.
To update: I left the RTL515 in standby mode for 3 days (between rides). The blue light was constantly flashing. When I checked the battery (from the Varia app field on the 830), it showed as full 3 days later. I took it on a 65 mile ride and had no issues. I think it was down 1 or 2 bars by the time I finished the ride about 4 hours and 222 overtaking cars later!
And the mybiketraffic.com site is great too. Upload the ride and you can see the overtaking cars happen as your follow the ride. (geekiness abounds!) I see a bit of a discrepancy between Garmin Connect and mybiketraffic as regards the car count. GC shows 222 cars, mbt shows 216 cars on yesterday's ride. And the moving avg speed differs too, probably because the moving time differs.