Battery performance is an exciting field that can provide many improvements to our application. It is widely underused, and even the most experienced developers dismiss it and do not take it into account. The authors of this book greatly encourage any developer to take as many of the actions described in this book as possible, and continuously check the improvement in performance and user experience from the application. We cannot say it often and loud enough: it pays off.
Google has promised to put all their efforts into providing a better battery and energy experience, and an extended API for developers. It will not be a surprise if upcoming Android versions start to provide new techniques to increase battery lifespan and improve energy consumption. We advise the reader to keep an eye on future Android versions (at the time of writing, 1Q2016, there is still no fixed release date for Android N).
After reading this chapter, the reader should feel comfortable knowing the main battery...
