For total max bro style battery life you may wish to consider limiting the device to 600MHz, you will notice the voltage jump from 600-700MHz is quite significant. Code: power=voltage^2*frequency obviously how you are connected to the net also has a significant effect in battery. i.e. under-powered wifi>wifi>2G>3G The other major pest is crumby software. Python+QML appz? forget it...hardware polling appz? forget it...
power=voltage^2*frequency