I live in a cold climate, so my battery was removed from the bike, charged fully and stored inside for 6 months.  Put it on the bike in May and have had some confusing signals.  It has worked - almost perfectly.  Problem is the LED indicator on the battery gives me one blink and goes out, no matter the charge status.  Other problem was even when the battery indicator on the UI showed full charge, it died on me completely.  Makes me nervous about going for a very long ride.