US researchers have successfully used Power-over-Skin technology to power small wearable devices. Instead of a battery they ...

Or, if your Apple Watch is no longer under warranty, you can participate in a trade-in program, pay for the battery replacement out-of-pocket, or sell the broken Apple Watch for parts.

Flip the AirTag so the silver side with the Apple logo is facing you. Use your fingertips to press down and rotate the silver piece about a quarter turn counterclockwise. The silver lid should ...