I have a Samsung Rugby Pro on AT&T, software version 4.1.2. I have had issues lately with battery life. I used to get 2 days of use, now I am only getting 1.2-1.3 days. The largest battery use is the Task Manager that is built in (i haven't downloaded or installed a task manager). After 12 hours of use, % battery used: Task Manager - 28% Voice Calls - 19% Android OS - 16% Device Idle - 8% Cell Standby - 7% Android System - 5% Facebook - 3% Clock - 2% Phone - 2% Anyone else run into this problem? Why is the task manager using so much battery?