A Chinese startup claims its new radioactive coin cell can provide power for decades. Here is why you shouldn't expect it in ...

Deep space probes and frontline soldiers share a basic problem: once they leave the grid, every watt has to be carried in. That constraint has shaped mission design for decades, from bulky ...

Rechargeable batteries are everywhere—from portable electronic devices and electric vehicles to renewable energy storage.

An international group of scientists has published a study that could lead to the world’s first “nuclear battery,” a technology capable of providing a million times more portable power than today’s ...