One setting I use that I know uses more battery power, is that I turned off the wifi power saving function in network connections, as it seemed to impact my ability to download large files...
After using ED/Estel for awhile yesterday, I noticed that when I clicked on the side panel it opened up wider, but....the program icons were not completely shown, it only showed the a narrow vertical sliver (ie, tall and narrow...) of the left edge of the icon. When I tried to tap on the narrow icon shown, it would not open up the program like it usually does..... Is there any way to fix that if it happens again or just shutdown ED and restart it?