Originally Posted by
johnny99
Also remember that a smartphone burns a lot more battery than a Garmin GPS. You can leave a Garmin turned on for 10 or more hours at a time. Your smartphone is going to last a small fraction of that with the screen and GPS turned on. Even with the smartphone screen turned off the whole time (greatly reducing its functionality), you're still not going to match the battery life of newer Garmin units.
I've been using MyTracks lately since my Edge 305 is broke and I recently figured out that if I
turn off my internet the program still works but uses 50% less battery. My last ride was 5 hours and I had 3/4 battery left at the end of the ride. I have a htc Hero android phone. Now I'm thinking I may not get my Edge 305 repaired if I can just use my phone, but I do like to see certain info as I ride and with the phone I cannot.