Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch ...

Discover how to build a simple wireless power transfer system at home using readily available components like enameled copper ...

A simple change in how new lithium-ion batteries are charged can boost their total lifespans by 50 per cent on average – and battery manufacturers everywhere can immediately put the discovery into ...

Electric-vehicle stations are straining the grid. A modest piece of hardware could ease the growing pains.