Green Technology

may eliminate battery usage for some devices.  IBM emerging technology innovations are poised to revolutionize the power requirements of electronic devices in the next five years.  …

…   “By rethinking the basic building block of electronic devices, the transistor, IBM is aiming to reduce the amount of energy per transistor to less than 0.5 volts.

With energy demands this low, we might be able to lose the battery altogether in some devices like mobile phones or e-readers. 

The result would be battery-free electronic devices that can be charged using a technique called energy scavenging. 

Some wrist watches use this today – they require no winding and charge based on the movement of your arm. 

The same concept could be used to charge mobile phones. for example – just shake and dial.”   …

Via IBM: Transistor Innovation.