Next task: find out battery indicator...

Now that I got most of them stuff working right, my last task would be trying to see if I can make power related feature working. For instance, it would be nice if I can get the power indicator at the top of the screen so that I can know whether I am about to running out battery. Also, I know save mode is kind of tricky, but maybe, just maybe, someone figure out how to make it work .... you never know.