Ofcourse I believe that Laptops/Mobile Devices can run much longer without the need to run for chargers for days. A Laptop running without power, a Mobile Phone running on Battery for a month with unlimited talktime, unlimited backup, how do they sound.Every such Device generates Heat while they run or while being in use. With the advent and progress we are making in Nano Technology this Idea is not far from reality. This idea deals with converting the Heat Energy into Electrical energy, and this energy will be stored by multiple nano capacitors which will discharge the electrical energy when the device is in use.The conversion to Electrical energy would be done by Nano Turbine which could be 1.5 cms in length, 1 cm in breadth and 1 mm in thickness. So whenever the Device is in use the heat generated would be fed to the turbine which would then generate the Electrical power and this shall be stored by Nano Capacitors. The Stored energy would be used by the Laptop Battery when the level in the battery dips below a set limit.So while you use the Laptop or Mobile the Battery is getting new charge.
Sounds like Toyata Prius..Not far from that reality would be this concept I guess.
Hope some innovative Tech Entreprenuers are reading this...would be glad to discuss more.
A hand kids past a misplaced believer.