So, superphone users -- which USB battery pack serves you best? Feel free to toss out Evo-specific solutions, but universal ones could help the masses. And it feels good to help the masses.
"I have the HTC Evo, which has terrible battery life. I've gone through many steps, including rooting it and using SetCPU, however I'm still not getting as much out of it as I would like. I am looking to buy an extended battery, but after researching them I have found prices and reviews to be all over the map. What brand / model has the best results? Thanks!"