http://www.bbc.co.uk/news/technology-17014808

Torches, drones and an electric Le Mans racing car are all test-beds for a new kind of “structural battery”, BAE Systems has said.

The batteries use carbon fibre and can form part of the body of a device.

By effectively building the power source into the fabric of an object they can save weight.

BAE is testing the technology in the Lola-Drayson B12/69EV, which aims to become the world’s fastest electric car.

The firm said it hoped the battery material will eventually be as easy to work with as existing carbon fibre.