The battery is a joke, people. It's not going into the final game.
That's why there's this notice on each post: All items below are provided without context. There is NO guarantee anything featured in them will be present in the final release. These items are shown from RAW development. My bad, I thought it was a repost from this thread. Krionikal's personal Twitter should be considered similarly, though.
Also, to be 100% clear, if a Duracell battery was added, it would be a trademark infringement, not entirely a copyright infringement. We are a company and we would of course go through the necessary paperwork to approve such use of the brand in our game. But, it's a joke and it will not be going into the game.
Also the Little Crusaders dragon was designed by @Wergulz who created the character himself for our game.