Apple ships iPhone 18 Pro Max with firmware-capped battery to clear transport rules

A software lock on a hardware limit

According to The Verge, Apple has built what the company calls a "battery-firmware solution" into the iPhone 18 Pro Max that keeps the device's cell under a 20Wh ceiling set by international shipping rules for single-cell batteries. Once active, the phone's battery is rated above that threshold, so rather than redesigning the hardware for transport, Apple meets the regulation in software while the device is still in its box.

The restriction does not stick around for long. The Verge reports that the firmware cap removes itself when the phone boots for the first time, restoring the full rated capacity after user activation. US eSIM-only models land at roughly 21.75Wh, while European units with a physical SIM slot come in at about 21.06Wh — both above the line the shipping rules enforce.

Prepare to Ship reverses the trick

Because the cap disappears at activation, Apple needed a way to make the phone compliant again whenever it has to travel back to the company — for a repair, for example, or on its way to a second owner. The answer is a mode called Prepare to Ship.

Per The Verge, the feature caps charging at 80 percent and holds that state for 14 days, pulling the battery's effective energy back under the limit. It lives in the Settings app under General, then Transfer or Reset iPhone, then Prepare to Ship. Apple's support documentation, cited by the outlet, says the battery "might need to discharge" before the process completes and that the device may run warmer than usual while it works. The mode can be cancelled at any time from the same menu.

The 14-day window is worth noting: once it lapses, normal charging behaviour returns, so repair depots and resale channels are working against a countdown rather than a permanent change.

Rivals chose costlier hardware

The Verge frames Apple's move against prevailing industry practice. Outside Asia, most Android manufacturers handle the same shipping limits by splitting their batteries into two smaller cells, each below the 20Wh mark. That design costs more and uses internal space less efficiently — a real trade-off as phone makers chase longer battery life in ever-thinner bodies. If Apple's firmware approach proves dependable, the outlet suggests, Android brands may follow with something similar.

Why it matters

The Verge describes the approach as a novel one, and the novelty is structural: a transport-safety rule is being treated as a software state rather than a fixed hardware property. The device is capped in transit, unlocked in the hand, and capped again on request.

That shifts part of the compliance burden onto users and repair networks. Anyone sending a phone in has to remember to switch on Prepare to Ship — and to know the feature exists at all — while the two-week expiry means the return journey must happen within a set period or the mode has to be re-applied.

The precedent also cuts both ways. If regulators accept firmware-governed capacity as compliant, expect manufacturers to push more of this work into software, where it is cheaper than redesigning a battery but only as reliable as the code enforcing it.