Four lemon batteries wired in a series charge a capacitor. When connected to a calculator, the capacitor supplies sufficient voltage and current to power the calculator. Insert a strip of copper and a ...

Researchers believe they’ve discovered a new material structure that can improve the energy storage of capacitors. The structure allows for storage while improving the efficiency of ultrafast charging ...

It's a widely known problem with roots in urban legend: Devices with motherboards failing in the early 2000s with a sudden pop, a gruesome spill, or sometimes a burst of flames. And it was allegedly ...