Originally Posted by
Bald Paul
Garmin does offer an extended battery that will mount below a Garmin GPS unit on an out-front mount that works very well
True. but in my experience the Edge touring barely makes it through the day in mapped navigation mode, which seems to be what others report. The claimed 12hrs applies if you display the data screen. The battery capacity is apparently 1 000 mAh. In comparison, the Enduro lasts 70+ hrs on a 550mAh, i.e. about 20 times more efficient. Which may not matter in many cases, but is a consideration for others. Recharging the computer and the external battery, every day, is no fun, and may pose problem if you do not have readily access to the power grid.