Its a lot of research going on ,how to reduce energy consumption to the devices and How we can invent a new way of generating Electricity that run our devices..!!Samsung Fascinate Android Phone (Verizon Wireless)
Its a new invention,that a Phone which uses any source of heat from your body heat to a radiator to keep your cell phone charged.

What make this work..?
It have an integrated thermogenerator which converts heat into electrical energy to keep the phone running.Every single micro degree heat of your body can be surprisingly used and conerted to electrical pulses.
Car Charger for Apple iPod iPhone 3G 3GS (White)
Hmm..nice ,so whats yep..? take out phone from your purse and keep it in pocket for charging..!!