Apple’s AirTags are great. They work seamlessly with Apple’s devices through the Find My app and they are perfect for attaching to your keys, putting inside your luggage or perhaps finding somewhere a little more obscure to put them – something I did last year when I put one inside my child’s Puffin toy. Wherever you choose to place them – your car, under a bike seat, your backpack – there will come a time when you will need to replace their battery. Don’t worry, it’s pretty simple.