Samsung Mobile on Twitter: "Save battery life by setting your #GALAXYS4 to auto connect/disconnect from a Wi-Fi network. http://t.co/tpcTbolTsQ" / Twitter
How to Make Your Galaxy S4's Battery Last Longer - Samsung Galaxy S4 User Guide - Tips, Tricks and Hacks | Tom's Guide
How to save battery life on SAMSUNG Galaxy S4 Zoom? - HardReset.info