To replace an AirTag battery, you'll need a new CR2032 3-volt lithium battery, and it helps to have a pair of rubber gloves.

You can jump-start a dead car battery by using jumper cables to connect its terminals to the terminals of a functioning car ...

Learn how to calibrate your iPhone battery in iOS 26 to fix inaccurate readings, prevent shutdowns, and optimize performance.

Here’s what you need to know if your power does go out from cold winds, freezing rain or due to an emergency situation.