Originally Posted by nolanbeck

I just finished a 700 mile trip and tried several things. What I ended up liking the most is Osmand on my phone. You can download the maps you need to your phone. Load the gpx routes that you want to travel to your phone. Place the phone in airplane mode with the GPS on. Osmand will give you turn by turn voice and visual directions along your route. It can be setup to run in the background with the screen off and come on 20 or 30 seconds before the next turn, etc.

It is a little difficult to understand though since I believe it was made in Russian and translated to English.

I tried with my phone fully on one day, using Osmand for nav and tracking myself with mapmyride and still had 30% battery after 7 hours. The next day I put it in airplane mode I had over 50% remaining after 7 hours.

I carried a 3000mAh USB battery but only had to use it on one long day spent fighting a headwind. One or two of these should be able to keep you going for a couple days if you use airplane mode.

A limited version of Osmand can be downloaded free, the full version cost a few bucks.