I've just released Doom Battery Widget which mimics the game's original HUD, including both Doomguy's damage graphics and armor (charge) percent!
The more your battery drains the more this is reflected on his face as he takes more and more damage which is sure to bring back memories of staying alive long enough to pick up that Chaingun! Also included is the charging yellow eyes indicator as you pump him full of juice!
Google Play Link:
I hope you enjoy this, I'm looking at pushing some more content into an update so I'd love to hear your thoughts and if you like it please don't forget to leave a review on Google Play!