Vodafone sleeping bag turns body heat Into clean energy
In a crowd of several hundred thousand people, all getting crazy under the fierce Tennessee sun at Bonnaroo Music and Arts Festival, staying in contact with friends (and worried big sisters) is extremely important. Vodafone, which last summer debuted a recharging truck to enable festival-goers to charge their gadgets, has now come up with an even more convenient solution--a gadget charging sleeping bag.
Vodafone isn't a new comer to the music festival circuit, and each season, they seem to try to outdo their own cleverness when it comes to technology aimed at the tent-dweller. We've reported on their solar charging umbrella (something that would make you instantly popular at Bonnaroo) and Orange Power Wellies, boots that turn your footfalls into power.
Now, Vodafone has revealed an even more convenient option that requires almost no effort on the user's part. The Recharge sleeping bag, developed with help from the Electronics and Computer Science Department at the University of Southampton, uses a prototype "Power Pocket" to harvest thermoelectric energy.
"Basically, we’re printing down pairs of what are called ‘thermocouples’," explains Stephen Beeby, Professor of Electronic Systems, on the Vodafone blog. "You print lots of those down and connect them up to make a thermoelectric module. One side of that is cold and the other is hot, and when you get a flow of heat through it you can create a voltage and a current. Voltage and current together equals electrical power."
Stephen claims that eight hours of sleep in the bag will provide 24 minutes of talk time and 11 hours of standby time. The Recharge sleeping bag (and the sure to be popular Power Shorts) will be tested at The Isle of Wight Festival and others throughout the summer.