I've been using my 2009 eZip for about 6 months now. I normally have two battery packs in at the same time. Layely, i noticed that when I'm running as fast as the bike will go that the motor will cut out. It resumes again when I cycle the pedals a couple of times. It seems to be happening just about every time I ride now. I use the bike mainly to get back to the remote area that I hunt in. Once I get there the bike usually sits for 4-6 hours. I'm wondering if in that period of time that the battery gets "cold soaked" ( the temperature is usually around freezing) whether that may be the issue. Any thoughts?