Millions of batteries discarded with computers have more than enough life to power home lighting for one year, researchers in India say.
A new material that requires no electricity uses the universe as a heat sink—even when the sun is shining.
Even though Google’s head-worn computer is going nowhere, the technology is sure to march on.
A startup has created a water-repellent coating that could significantly increase power plants’ efficiency.
A new solar power system is easy to add to a roof, and performs its own safety checks.
The blue LED might save more energy than just about any other technology.
New technology could be twice as efficient at converting sunlight to electricity.
Panasonic reveals a design that surpasses a 20-year-old mark for solar cell efficiency.