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.

The complementary metal-oxide semiconductor, or CMOS, stores the system date and time as well as other settings on your Gateway laptop. The CMOS is powered by a small battery. If this battery runs low ...

If you need to replace the battery inside an AirTag, Apple is warning against using a replacement CR2032 coin battery with a bitterant coating because there's a chance it won't work. Coin batteries ...