I did a long ride last Monday (about 100 miles) and set a course to follow in my Edge 810. It was fully charged at the start. It ran out of battery power after about 7 hours and I lost not only the ability to navigate from it but also all of my ride details. Good job I took OS maps as back up!! This doesn't seem v good to me. Am I expecting too much? How can I eke out the battery power? I had it on map display most of the time. Does that take up a lot of power? Should I have it set to just show turns as map display and have the Activity pages showing most of the time? Can you install better/new batteries?
