Smartphone battery life is the one thing that hasn’t kept up with our insatiable need for mobile tech in all aspects of our life. Mugen Power is looking to fill that need with their batteries. The company has released a new 3600 mAh battery compatible with the Motorola Droid 3 that claims to give the smartphones 2.4 times the battery life of the original battery. That’s a healthy increase, and could prevent those frustrating days when your smartphone bows out before you make it home from work or school. The battery is out of stock right now, but will ship on October 28th if you order one now. They don’t come cheap, though. Each battery costs about $100.