The iPhone 18 Pro Max comes with a super-smart firmware solution that allows its large battery to bypass international shipping restrictions — and that solution is automatically enabled the first time the device is turned on. Apple announced via its support page that the new battery-firmware solution keeps the energy capacity below the 20Wh during shipping, but automatically restores it to full capacity the first time the user turns on the device. It’s an innovative approach that could change the way all smartphone manufacturers approach battery shipping regulations.
See also: Apple increases battery replacement costs for iPhone 18 Pro and Pro Max
International shipping regulations impose strict limits on battery capacity for individual cells. Specifically, IATA (International Air Transport Association) and other international organizations stipulate that single-cell batteries cannot exceed 20Wh to be transported without special permits and additional procedures. This creates a significant obstacle for smartphone manufacturers looking to offer longer battery life in their devices, especially as users increasingly demand longer battery life.
Apple one in the industry had ever seen before: instead of reducing the physical capacity of the battery or using two smaller cells, it chose to lock the capacity via firmware during shipping. This solution is as simple as it is effective: the iPhone 18 Pro Max arrives to the user with the battery running at under 20Wh, but once the user turns on the device, the firmware is automatically unlocked and the battery gains its full capacity.
iPhone 18 Pro Max: What does full battery capacity mean in practice?
After powering up, the iPhone 18 Pro Max restores its full rated charge capacity, which is 21.75Wh for US eSIM-only models and 21.06Wh for European models with a physical SIM slot . The difference between the two versions is due to the physical space occupied by the SIM slot on the European models, which takes up slightly of the available battery space. In any case, both versions clearly exceed the 20Wh limit for shipping, making the firmware solution necessary.
The increase in capacity from 20Wh to 21.75Wh represents an increase of approximately 8.75%, which in practice translates into significantly longer battery life. For a user who uses their smartphone intensively, this difference can mean an additional 1-2 hours of use or even the ability to reach the end of the day without needing to charge. Apple has invested significantly in improving the battery life of its devices in recent years, and the firmware solution for the iPhone 18 Pro Max is another step in this direction.
It's worth noting that Apple isn't the only company facing this problem. Android like Samsung, Google , and OnePlus have also been looking for ways to offer longer battery life without violating shipping regulations. The most common solution that Android is to use dual-cell batteries — that is, two smaller cells instead of one large one — especially for markets outside of Asia. However, this solution has significant drawbacks.
See also: Apple Event September 9: iPhone 18 Pro Max, prices in Greece & what to expect
iPhone 18 Pro Max firmware: How does Prepare to Ship work?
Apple user needs to send their device for repair or resale. For this purpose, it has integrated the Prepare to Ship, which resets the charging limit, limiting the charge to 80% for a period of 14 days. This ensures that the device can be shipped safely, in accordance with international regulations, without the user having to do anything particularly complicated.
To enable Prepare to Ship on your iPhone 18 Pro Max, follow these steps: Open Settings , go to General , select Transfer or Reset iPhone , and then tap Prepare to Ship. Apple warns that the battery “may need to discharge” to complete the process, and that the device may get warmer than usual during this process. Prepare to Ship can be turned off at any time by returning to the same settings menu.
Apple 's firmware solution has significant advantages over the alternatives used by Android manufacturers . Dual-cell batteries are more expensive to manufacture, take up more space due to the additional connections and electronics, and are generally less energy efficient than a single cell of the same total capacity. The firmware solution, in contrast, requires no changes to the hardware and does not affect the efficiency of the battery.
The question now is whether Android manufacturers will adopt a similar solution. If Apple 's firmware solution proves successful, it's very likely that we'll see similar approaches from other manufacturers. Companies like Samsung with its Galaxy S series or Google with its Pixel smartphones could benefit significantly from such a solution, as it would allow them to offer larger batteries without the drawbacks of dual-cell designs.
iPhone 18 Pro Max: The impact on the smartphone industry and European users
For European users, the iPhone 18 Pro Max firmware solution is of particular importance. Europe has strict regulations regarding batteries and the shipping of electronic devices, and Apple 's solution ensures that users in Greece and other European countries can enjoy the full battery capacity ( 21.06Wh ) without any problems. This is especially important in an era when users are increasingly demanding greater autonomy from their devices.
The trend toward larger batteries in smartphones is undeniable. Users are using their smartphones for more and more tasks — from streaming video and gaming to working and video conferencing — and the demand for longer battery life is growing. At the same time, manufacturers are trying to keep their devices thin and light, which makes it difficult to fit larger batteries. Apple offers an elegant way out of this dilemma, allowing for a larger battery without sacrificing design or performance.
See also: Apple Event 2026: iPhone 18 Pro Max coming on September 9 with A20 Pro and variable aperture
In summary, the battery-firmware solution Apple introduced in the iPhone 18 Pro Max is a truly innovative approach to a problem facing the entire smartphone industry. Rather than settle for a smaller battery or resort to more complex and expensive hardware solutions, Apple found a clever way to circumvent shipping regulations without sacrificing the user experience. If this solution proves reliable and safe in the long run, it is almost certain that other manufacturers will adopt it, permanently changing the way smartphones deal with battery shipping restrictions worldwide.
