I bought a FLY6 back in the winter of 2015/16. I was very, very happy with it all that summer that followed. It worked perfectly. Motorized vehicles seemed to give me more elbow room with the bright flashing red lite and knowing I had a video record of every vehicle passing me from behind felt good. However, at the end of the summer when I was no longer going out on the road I put the unit away and forgot to give it a charge every once in a while. So, it completely discharged. Sometime that winter it occurred to me that it might be a good idea to give the unit a charge. Plugged it in BUT IT WOULD NO LONGER TAKE A CHARGE! I contacted their customer service and over the course of a couple of weeks we went thru a bunch of emails and several different procedures to try and resurrect the unit without success. IT WAS KAPUT! I was just outside the 1 year warranty but I was hoping they would at least sell me a new unit at a nice discount. No such luck. They pleaded poverty and said they could not afford to do that. They would not take a cent off a replacement. There was nothing in the written instructions that warned that the unit needed to be kept from a discharged condition. So, unless they have changed something, I strongly recommend that you make sure you do not let your unit get into a deep discharged state. 'Cause if you do... kaput!
Keep on Pedalin'