The belief that Apple would ship a sealed rechargeable puck was widespread ahead of the device's release. Engineering a rechargeable lithium-ion pouch small enough to fit inside a 1.26-inch footprint would have forced major trade-offs. Such batteries degrade after 300 to 500 discharge cycles. When sealed permanently inside a water-resistant enclosure, battery degradation creates disposable electronic waste within three years.
Apple instead built around an off-the-shelf CR2032 lithium coin battery. This standard 3-volt cell powers automotive key fobs and motherboard clocks worldwide. By opting for a replaceable coin cell, the device achieves an expected AirTag battery lifespan of roughly 12 to 14 months under normal tracking conditions. You do not purchase charging cables, dock stands, or secondary magnetic adapters. You simply swap the cell when juice runs dry.
Third-party marketplaces frequently feature modified "rechargeable AirTag mods" wired to custom lithium capacitors. These aftermarket shells strip away IP67 water resistance, add unnecessary bulk, and void official hardware protections. Sticking with standard replacement cells remains the only reliable route for daily tracking.
