Vortex has a second design – the Ecoteller – that can be powered by solar energy.
Smaller generators can be powered by natural gas, he said, and larger ones by diesel fuel.
The system can be powered from a mains supply, rechargeable battery pack or even solar sources.
Medela's no-hands model can be powered by your car's cigarette lighter.
In emergencies it can be powered for 24 hours from a car battery.
The USD100 laptop does not even need electricity, since it can be powered by vigorous cranking.
Either type of detector can be powered by batteries or by house current.
Such motors are extremely efficient, and can be powered from a station's solar panels.
Fusion produces no long-lived radioactivity, and it can be powered by a form of hydrogen found in sea water.
Again, this uses your existing cables to provide charge to your phone or anything that can be powered via USB.
Electricity can be produced by wind, sunlight, biomass or nuclear reactors, and cars can be powered by biofuels and electricity.
