Where We're Headed: Two developing technologies could produce power cells that could last for weeks without needing to be recharged. The first such technology is the hydrogen cell, which is being pursued by Apple as well as by a partnership between semiconductor maker ROHM, power-cell developer Aquafairy and Kyoto University. Perhaps more promising is a new technology called lithium-ion microbatteries. The developers of this technology at the University of Illinois claim lithium-ion microbatteries are 2,000 times more powerful than today's Li-ions, can be charged almost instantaneously and are powerful enough to jump-start a dead car battery.
Prediction: By 2018, no one will be complaining about a dying or dead smartphone battery, unless they're trapped on a deserted island.