Best trackers for a laptop and laptop bag

Start with the thing every page on this subject should say first: there is no consumer GPS tracker that fits in or on a laptop. Nothing cellular is that thin, that cool or that long-lived on a battery. What works is a Bluetooth tag matched to your phone — an AirTag if you carry an iPhone, a Moto Tag 2 or another Find Hub tag if you carry Android — plus a slim card in the sleeve pocket and, ideally, a second tag stuck to the machine itself. All of it costs nothing per month.

The reason the premise fails is physics and billing rather than product planning. A cellular tracker needs an antenna, a battery big enough to feed a radio, and a data plan to report over. That is a device the size of a deck of cards that needs charging every few weeks, and it costs a subscription — which is why the ones that exist are sold for vehicles, trailers and plant. Those magnetic vehicle trackers are the nearest real thing, and none of them is going in a laptop sleeve.

A Bluetooth tag, by contrast, has no radio of its own worth speaking of. It whispers, and other people's phones relay the whisper. In the places laptops actually go missing — airports, cafes, campuses, offices, trains — the density of phones is as high as it gets anywhere on earth, which is the one scenario in which a crowd-network tag is at its strongest. The difference between where it is and where it was is still the limitation to understand before you buy.

What matters when you are tagging a laptop

Thickness, measured against the pocket you own. A keyring tag is 8 mm of bulge against a screen; a card tracker is about the thickness of two credit cards and disappears into a sleeve's document pocket. If the tag makes the bag awkward, it comes out of the bag within a week, and a tracker in a drawer finds nothing.

Your phone's network, not the biggest network. An AirTag rides Apple's crowd network and is unusable from an Android phone; the Find Hub tags are the reverse. Chipolo and Pebblebee cards pick one network at setup and can be reset to the other, which is the hedge if you might change platform. Buy for the phone in your pocket today. The four questions that settle this take about a minute.

Alarm volume, because most “lost” is indoors. The common case is not theft, it is a bag under a desk in a building you are already standing in. The map will say “this building”. The alarm is what finds it. Card trackers are quieter than keyring tags — all of them, for the simple reason that a thinner body makes a worse speaker — so if you only buy one tag, put a loud one in the main compartment rather than a silent-ish card in the sleeve.

Replaceable, rechargeable or sealed. A coin cell is a two-minute fix from a supermarket. A rechargeable card needs a cable about once a year. A sealed card simply expires, which means buying the same product again in a couple of years and which we would avoid in a bag you intend to keep. The replaceable-battery shortlist exists because this is the quiet recurring cost in a category that claims to have none.

Whether a thief will find it. One tag in the obvious front pocket is one tag a thief can empty into a bin. Two tags in two places is a different proposition, and the second one costs less than a takeout lunch.

Where to put them

Tag one, in the bag: the main compartment or an interior zip pocket, loud, on whichever network your phone uses. This is the tag that answers “where is my bag” and it does most of the work day to day.

Tag two, on the machine: a slim card in the laptop sleeve itself, or a tag on an adhesive pad stuck to the underside of a hard case. In a theft the bag and the laptop get separated fast — the bag is discarded, the machine is carried or sold — so a tag that travels with the laptop rather than the luggage is the one with a chance of telling you something useful.

Not on the lid where it will be peeled off, and not where adhesive meets a vent. Adhesive is a permanent decision on a machine worth four figures, so if that makes you wince, use the sleeve pocket and skip the pad.