Battery Worn Out? The T-shirt That Uses Loud Music To Charge Up Your Mobile

Glastonbury revellers with mobile phones running low on batteries have an extra incentive to elbow their way closer to the stage this weekend.

A prototype T-shirt that charges mobiles while festival-goers watch bands in action has been unveiled by telecoms giant Orange.

Users just have to plug their phone into the T-shirt for a quick top-up charge whenever they need it.

Power it up: A prototype T-shirt that charges mobile phones while music fans watch bands at this weekend's Glastonbury Festival has been unveiled

The futuristic garment works by using noise-responsive technology - simply, the louder the music, then the quicker the phone charges.

It uses an A4-size piece of piezoelectric film in a T-shirt to absorb pressure from sound waves. It converts these into an electrical charge, which it then transfers from its battery into a lead that fits most phones.

Orange will be conducting live testing of the gadget on site at the festival to see which acts are the 'best to charge to' around the Spirit Of 71 stage.

Tony Andrews, co-producer of the Spirit Of 71, said: 'Sound vibrations, particularly bass frequencies, will create enough shaking to produce electricity from a material as simple as piezoelectric film.

'It looks like it could provide a real solution to mobile charging and I'm interested to see how the Orange Sound Charge performs in a live testing environment such as Glastonbury.'

How it works: The futuristic garment uses noise-responsive technology to charge the phone

Andrew Pearcey, head of sponsorship at Orange UK, said: 'In a vibrant festival environment such as Glastonbury, sound is such an obvious medium that it seemed like a natural fit to use it in the development of this year's prototype.'

The new Spirit Of 71 stage harks back to Glastonbury's earliest year with veteran acts returning to Pilton Farm to perform.

Terry Reid and Linda Lewis will be playing back-to-back as they did in at the 'Glastonbury Fayre' in 1971, the festival's second year, but the first time the iconic Pyramid stage was constructed.

Glastonbury 2011, which officially starts this Friday, sold out all 137,500 tickets within hours of going on sale last October.