[Zubersoft]

if you turn off Settings->Display Settings->Fullscreen Mode, then the standard Android status bar will be shown at the top which has the battery power indicator on it. I'd rather not add another icon to the title bar if it can be avoided, especially one whose state I have to constantly monitor and update.  If you are more concerned about getting a warning when the battery is low, I can certainly add an option to pop up a warning when that occurs, although I think most devices do have an alert that is generated for this. The percentage at which the low battery notification is triggered can be different on every device. On my phone it is 15% but I don't know what it is on my tablets.

Mike