Originally Posted by
Hit Factor
I have a Garmin RTL515,
https://buy.garmin.com/en-US/US/p/698001
Up to 16 hours of runtime, but the really neat part, is it has radar. The radar notifies you of cars approaching from the rear.
I use it with Ride with GPS on my phone. There are other options. It automatically links up with my Garmin Fenix 6 watch. This is micro-USB rechargeable.
I have used the Planet Bike lights and there is nothing wrong with them. But I like the Garmin with its radar feature. My only minor issue is on long rides, I need to put my Garmin handlebar mounted GPS 820 to sleep or it runs out of juice constantly communicating with the radar. However, it wakes up when the radar is contacted and I can wake it up at anytime to check what I want to check.