Originally Posted by
Redhatter
Yep, now why would it be reporting 5% battery left when my radio reports the battery on the bike is sitting around 12.4V and said battery supplies the tail light via a USB 5V adaptor.
As I say, something's a little flakey, mainly exacerbated when the unit is running on external power.
Not all devices do well when being powered while running. It confuses some devices if they were not designed to do that. I don't know if this is the case for the Fly6, I just mention it as a possibility.
I would talk to the company. I've heard they're pretty responsive and if you have a bad unit they are likely to replace it.