I am seriously considering going to series 2 aluminum due to battery life. My 1 lasts through the day, but I can't imagine if I really start utilizing the workout stuff (as I plan to), that it will continue to last that long.
How much of a difference is there, really, in the battery lives of the 1 and 2?
How much of a difference is there, really, in the battery lives of the 1 and 2?