Understanding watt-hours will help you survive power outages and off-grid adventures.

A big home backup battery costs thousands of dollars -- and thousands more to install. A new entrant in the space seeks to bring a smart-home approach without requiring the upfront electrical work of ...

A new battery that can deliver 100-times higher energy density than current ... The next-generation solid-state battery boasts an energy density of 1,000 watt-hous/ litre (Wh/L), though size ...