Just wondering about the best strategies, as my Droid Turbo seems to be a bit power-hungry. The screen blanks OK if I'm not moving it around, but I'd like to add the battery level indicator to the locked screen. I'm using wifi to listen to various internet sources, with wired earbuds. If I go for a bluetooth headset, or external flashdrive music storage, is either a significant extra power drain? For example, a bluetooth headset is self powered, but the bluetooth transmitter in the Droid requires power itself- which is greater? Is there an 'energy app' that manages power for these kinds of uses (radio, audiobook, etc)? Thanks in advance!