LONDON: Scientists have invented a pair of shorts which stores energy to charge wearer'sphone battery while they are on the move. An average person wearing the Power Shorts and going for a stroll can generate enough energy to charge a battery for four hours, the Sun reported. 

This happens with the help of a fabric that turns walking into electrical power. The gaps in the clothes are squashed together while a person walks and the energy created is then used to power mobiles. 

Christian Cull, Director of Communications at Vodafone, said that their ambition was to create a practical solution to charging-related issues that are experienced by many people at outdoor events. 

In addition to the shorts, scientists have also come up with a sleeping bag to charge smartphoneswhile the user sleeps. The mechanism to charge in this is similar to the shorts but instead of movement turns body heat into battery life for a mobile. 

And after a person sleeps for eight hours, it stores up enough energy to power their mobile for the rest of the day.