steve_sordy
Wedding Crasher
The Shimano powered Focus has had problems with cold weather charging, which is documented in threads on this forum . .............
As a Focus owner posting on that Forum, I am certain that it is rogue 4.5Amp chargers that are the problem, but only when both charger and battery are cold and the battery charge is low. I had zero problems with 4Amp chargers at any temperature or state of charge.