Originally Posted by squeakywheel
Leaving the lights on the bike wouldn't work for me. It isn't the theft possibility. Its the temperature. You wan't to take your batteries indoors during Minnesota winters. The cold temperature will reduce the batteries output to nil.
Hm. I leave mine outside at night, down to -5F it's been OK. But I don't let them get too close to dead. I have a 3.5 hour runtime, and I put them back on the charger after 3 trips (x45 min = 2.25 hours)
Do you have LiIon batteries? Those DO shut almost completely down in the cold, which is the main reason I don't have them, I use NiMH. My SLA battery I was using last year really tanked in the cold too.