Cars coming with USB ports have been so helpful, letting drivers charge their phones without getting an adaptor that plugs into the old cigarette lighter port.

Hint: The products themselves may not be the issue.

Did the Bluetti Pioneer Na keep working in the freezing cold when most batteries would give up? I tested it to find out.

Go inside the factory where 32 robots make a shoe’s upper in just three minutes.

Scrolling and streaming suck plenty of power on today's Android phones. Here's how to squeeze the most juice out of your battery, including a new option to monitor battery-hungry apps.