Redditor telekinetic overcame this rite of procrastination (while Reddit was right there the whole time) and created this Super Metroid battery gauge for his Android phone, viewable to the left. Telekinetic modded various widgets and programs, such as the ADW Launcher EX and the Ultimate Custom Clock Widget, hacking his way through to reveal this final, super product.
Telekinetic is talking with excited developers on his Reddit post about making this gauge a gettable thing for the larger Android audience, and there is a tutorial on its creation in a separate post.
As telekinetic puts it, he "got a little carried away," but as we see it, he got carried away just enough. Carry on, telekinetic. Carry on.