SolidEnergy Systems, MIT's commercial spin-off, has managed to create a technology which promises to double the capacity of standard lithium-ion batteries used in today's gadgets without increasing the size of the battery module.
The trick involves a simple tweak of existing technology that can be incorporated into existing production lines, theoretically bringing twice the battery power to our pockets from 2017.
I know what you're thinking, but don't hold your breath for an iPhone with 2x stronger battery. Given Apple's focus on thinness, thinner iPhones with the same or marginally better run time as existing models are much more likely.