The process is similar to boosting the battery of a gas-powered vehicle, but with a few key exceptions and precautions.

When temperatures plunge, batteries are often the first technology to falter. From cars that refuse to start to phones that shut down with double‑digit charge remaining, cold weather exposes how ...

You turn the key and nothing happens. The thermometer reads 10°F and your dashboard is dead black. Your battery is either ...

You try to turn on your car, and it just won’t start. Maybe the dashboard doesn’t even light up. A likely cause: The 12-volt battery is dead. All cars lose a little battery power when parked. If you ...