How does the battery life for these two devices compare? I have a rooted EVO with an extended 3500 mAh battery, so my battery life is fine (36-48 hours unplugged before having to recharge with moderate use). I have a friend who is getting an EVO shift and was asking me about battery life for that phone. I am not sure about the shifts battery life. If it is better than the EVO, why would that be? just curious.....thanks!