what the DU Battery Saver PRO & Widgets pro version feature
INTELLIGENT MODE SWITCHING: Automatically switch smart battery saving modes based on your preferences;
-Battery Level: Switch to any preset mode when the battery power reaches a specific level;
-Time Schedule: Switch to any smart battery saver mode based on time of day;
AUTO CLEAR APPS: Automatically shuts down battery power: draining apps that run in the background;
-Set an Auto Clear schedule at any interval you choose;
-Protect important apps from auto clearing by adding them to the Ignored Apps List;
-Clear unnecessary background power consumptive apps on screen lock;
CPU FREQUENCY (for rooted devices only): Save even more power by reducing the speed of your Android phone’s processor when your screen is locked.