Yes, it is completely legal to track your luggage using Bluetooth or GPS devices like Apple AirTags or Tile. In 2026, the TSA and FAA explicitly allow these devices in both checked and carry-on bags because they use small, low-power lithium coin-cell batteries (like the CR2032) that fall well below the safety limits for "High-Fidelity" air transport. While a few international airlines briefly considered bans due to battery concerns, global aviation authorities have since clarified that these "High-Fidelity" trackers pose no risk to aircraft systems. The only high-fidelity restriction involves "Smart Luggage" with non-removable large lithium batteries used for powering the suitcase itself; those must be removed if the bag is checked. For the 2026 traveler, tracking your bag is a high-fidelity best practice, often helping you locate a "missing" bag even before the airline’s own systems register its location, providing peace of mind and a "High-Fidelity" advantage during baggage claim disputes.