Flickr/thegreenpagesBattery wars power change.Between now and 2021, battery production all over the world will more than double, Bloomberg reports. With more companies getting into the game, expansion and competition are up, and prices are down.This will mean more opportunities for energy companies and electric car manufacturers, and better deals for consumers looking to purchase clean powered technology for less money.Gigafactory One in Nevada is Tesla’s battery producer at the moment.