Regarding 1: Please note, that you need to unload the wireless driver modules in order to get the most effect of saving power.
In my test scenario only disabling WiFi saves about ~0.4 Watt, unloading the modules removes another ~0.4 Watt.
Regarding 1: Please note, that you need to unload the wireless driver modules in order to get the most effect of saving power.
In my test scenario only disabling WiFi saves about ~0.4 Watt, unloading the modules removes another ~0.4 Watt.