A cold-blooded war is raging on Android between “what users can do with their devices” and “how much their device lasts on one charge”. Each new Android OS version is less merciful to your background processes. Different OEMs kill your apps straight away without asking whether you do something useful for your users or not. New weapons of mass destruction are being invented year by year. Their names? Doze mode V1!, Doze mode V2!, Background restrictions!, Adaptive battery! and more are coming this year whose evil names are yet to be known. But we can already imagine their devastating powers.