All they will have to do is look for the tent windmill -- or just wave their arms.
Teamed up with Texas-based Gotwind, the festival, which focuses on presenting alternative solutions to environmental problems, will demonstrate a tiny charger that when attached to an arm that can power a mobile phone when the arm is waved, or even when the wearer dances.
The alternative technologies are sponsored by mobile phone operator Orange, which has promoted the environmental-friendly festival for a decade.
"It is more important than ever that we continue to innovate and demonstrate how mobile technology can help bring people together and make festival life a little bit easier," said Hattie Magee head of partnerships at Orange UK, in a statement. Magee noted that the use of mobile phones is crucial for the attendees to stay in touch with each other over the 900-acre festival grounds.
Last year, Orange demonstrated GotWind's mini wind-powered turbine at the festival. Called the Orange Mobile Wind Charger, the device sits on the top of a tent and can charge scores of mobile phones. Orange expects the device, which utilizes both wind and solar power, to be used to charge thousands of mobile phones over the three-day festival.
"The Gotwind Rechargepod is the first mobile phone charging station powered solely by wind and solar renewable energy," said Gotwind in a release.
The arm band charger will be tested for the first time at this year's festival. The device is the size of a deck of cards. The charger uses weights and magnets to deliver electric currents.