Last weekend, I went on a 50-mile bike ride and used an app called 'My Tracks' to track my entire route. I started with a 100% charge and at the end of the ride my battery was down to 74%. I was quite impressed. Of course, I had WiFi, Bluetooth, and Sync disabled. I was tempted to root my N1 after seeing the thread on 72 hours of battery life, but I thought I would give it a shot with what I already have. Anyhow, I was wondering if anyone else on the forum uses their N1 to training purposes.