Flexible wearable electronics use body heat for energy

https://www.sciencedaily.com/releases/2017/06/170622143123.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+sciencedaily%2Fmost_popular+%28Most+Popular+News+--+ScienceDaily%29

A Few Quick Tips To Boost Your Android Phone's Battery Life

http://www.businessinsider.com/maximize-your-android-phones-battery-life-2012-3?IR=T