Why You Can't Charge an Apple Airtag: the Surprising Truth Behind Its Power Design
By Maya Lin-Takahashi
Fitting a rechargeable lithium-ion cell, a power management integrated circuit (PMIC), and inductive wireless charging coils inside an item tracker measuring just 1.26 inches in diameter creates severe spatial penalties. Wireless charging limitations dictate physical component volume. Adding copper receiving coils and thermal dissipation shielding would have doubled the device's thickness. It also would have inflated manufacturing overhead, pushing consumer pricing far beyond the original $29 launch mark.
Rechargeable cells degrade aggressively. Miniature pouch batteries exposed to harsh temperature swings inside checked luggage, hot automotive glove compartments, and freezing bicycle frames tend to lose capacity rapidly within two years. By relying on a swappable lithium 3V coin cell, Apple bypassed the planned obsolescence that kills sealed wireless earbuds. The chassis survives indefinitely because the consumable power plant remains completely modular.
Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.
