If you had to assign a percentage (0-100) on how much power the following functions uses, what would you set? We can assume we are using an average android 1.6 device. Please include a motivation as well. * Flight mode (i.e. all other features turned off) * GPS * WiFi * Mobile network (2g) * Mobile network (3g) * Bluetooth For me, I would probably set something like Flight mode 20% - the basic power consumption when almost all functionality is turned off. GPS - 0% when turned off and 20% when turned on. It might be even higher when it is used perhaps? As I understand it GPS is always turned off when it is not actively used. WiFi - 8% when turned on but not actively used and 13% when turned being actively used. 2g/3g network connection 9%-14% The higher number for 3g. 3g uses more power especially when talking, at least for other terminals, not 100% sure about android. Bluetooth - 4% . Bluetooth shouldn't use so much power.. Maybe 4% is too high. What I need is approximate figures so that I can get a feeling (i.e. it does not need to be that exact but the feeling should be somewhat right) on how much power is used when different features are turned on. I know that some approximations will have to be made. If the total is 100% it represents that the battery is drained at the maximum possible speed. In my example above a phone with 3g and no other functionality enable would take have 34% power consumption (20% + 14%).