Let me start off by giving credit to oMenaceTigero's Spiderman battery indicator. I based mine off of his.
So now let me introduce my creation.
I did this for me as I have this logo tattooed on my back. It starts as red and turns grey as the battery gets lower. This is a metamorph so install accordingly. I am not responsible for bricking your phone. I am running the latest Cyanogen(mod) and UD2.5 stable with no issues.