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The Finnish giant has recently filed a patent application for a phone that could recharge itself by harvesting energy from the owner’s physical movement, instead of being connected to a power source with a wall or car charger. Named "Piezoelectric Kinetic Energy Harvester", this technology involves a battery powered device using piezoelectric elements to register movement and generate electrical energy. So when the user walks or moves the phone, more juice will be added to the battery.

In fact, the Finnish company is not the only handset vendor who wants to go green. For instance, rival Samsung has started embracing solar energy as an alternative energy source in one of its phone, Samsung Blue Earth. Eco-friendly handsets that are made of recycled materials, like Motorola Renew W233 and Samsung Reclaim SPH-m560, can also be seen on the market. Green factors are now playing ever-greater roles when consumers are choosing a cell phone.

Nokia said the new technology could at least partially recharge the device battery and provide longer battery life. But like solar energy, it would be hard for it to completely erase the need of normal chargers.

At the moment, the technology is simply filed as a patent, so it might take quite a few years until Nokia’s kinetically charging cell phone becomes a reality. Still, it is an important step toward developing a more cost-effective and eco-friendly method of powering up our handsets.