It drains your battery. That's pretty much it. How fast depends on the size of your battery and your phone’s processor A smaller battery or faster processor means faster draining Generic battery drainer drains your battery by performing any combination of: - Intensive CPU work - GPU computations(May also put load on CPU) - Keeping the torch on - Maximizing screen brightness with Wake Lock - Continuous GPS requests - Continuous WiFi scanning - Continuous Bluetooth scanning Choose which funct