According to multiple sources in the supply chain, the iPhone 18 Pro Max may incorporate a record-breaking 5,200 mAh battery, an A20 Pro chip manufactured using a 2-nanometer process, and Apple's own C2 modem. If all of this turns out to be true, it could be the biggest leap in battery life in iPhone history.
An iPhone 18 Pro Max concept. (Source:Fpt./YouTube )
More notably, a new report indicates that the device has entered the production testing phase, a milestone suggesting that the September launch plan is gradually becoming a reality.
A leap to the largest battery ever at 5,200 mAh.
According to new leaks, the iPhone 18 Pro Max , and possibly the standard version, will be slightly thicker to accommodate a larger battery. Supply chain sources suggest the Pro Max could have a 5,200 mAh battery, making it the iPhone with the largest battery Apple has ever equipped.
This is a significant change compared to previous generations, which typically prioritized thin and lightweight designs. Increasing the physical battery capacity is the most direct and obvious way to extend usage time.
According to 9to5Mac 's analysis , the increase in battery size is "the clearest evidence" that Apple is aiming for the best battery life ever.
However, battery capacity is only part of the story. The optimization of both hardware and software is what truly determines whether the iPhone 18 Pro Max is a breakthrough device.
C2 Modem: An independent move away from Qualcomm
One of the key strategic changes lies in the new mobile modem. Apple is reportedly going to equip its devices with its own C2 modem, instead of continuing to rely on Qualcomm as it has for many years.
Apple's current generation modem is the C1X – featured in the iPhone Air line and predicted to be included in the iPhone 17e. The previous C1 modem delivered significant improvements in energy efficiency. Therefore, the C2 is expected to continue this trend, helping to reduce power consumption when connected to 5G.
Notably, the C2 is rumored to support NR-NTN (Non-Terrestrial Networks) technology, paving the way for 5G satellite connectivity for data transmission, rather than just emergency messaging as is currently the case. If realized, this would be a major leap forward in global connectivity.
More importantly, this could be the first time an iPhone Pro model doesn't use a Qualcomm modem. Economically and strategically, this suggests Apple is getting closer to its goal of controlling its entire semiconductor value chain, from processors to modems.
A20 Pro 2 nanometers: High performance, more power efficient.
The third piece in the battery upgrade puzzle is the new processor, most likely named A20 Pro. This chip is said to be manufactured using a 2-nanometer process, smaller and more advanced than the current 3-nanometer generation.
Smaller processing power typically offers two main benefits: higher performance and lower power consumption. If Apple optimizes it well, the A20 Pro could make the iPhone 18 Pro Max both more powerful in AI tasks, graphics processing, or video recording, and more battery-efficient in everyday use.
With its 5,200 mAh battery, power-efficient C2 modem, and 2nm A20 Pro chip, the iPhone 18 Pro Max has all the technical specifications to set a new benchmark for battery life.
However, it's important to note that actual battery life doesn't depend solely on the hardware. Each new generation of iPhone typically comes with more power-consuming features, from upgraded cameras and brighter screens to background AI tasks. Therefore, even with better hardware, Apple may only aim to maintain stable battery life rather than dramatically increase it.
Production testing has begun.
Alongside rumors about specifications, a report from MacRumors indicates that the iPhone 18 series has entered the final stage of mass production testing.
According to the leaker Fixed Focus Digital on Weibo, the Pro models have begun trial production runs to validate the process before official mass production. This is a crucial step to ensure the device meets quality standards and is produced in time for the September launch event.
Video reveals the new design of the iPhone 18 Pro. (Source: Fpt./YouTube)
“The iPhone 18 series has entered the mass production testing phase. The iPhone 18 Pro production line has also started operating. According to current information, the materials haven't changed much; the design and overall specifications remain the same,” the source said.
That doesn't mean there won't be significant changes like larger batteries, new modems, or 2nm chips. The testing phase mainly involves validating the manufacturing process and materials, while software optimizations and energy efficiency improvements may still be ongoing.
If the leaks are accurate, the iPhone 18 Pro Max could become a new milestone in Apple's cautious battery upgrade journey over the years. In a context where users are increasingly reliant on smartphones for work, entertainment, and AI, longer battery life is not just a convenience, but also a strategic competitive advantage.
However, everything is still in the rumor and testing stage. Only when Apple officially announces it will the tech world know whether the iPhone 18 Pro Max will truly set a battery record as expected, or simply maintain the balance between performance, design, and battery life that the company has pursued for many years.
(According to Forbes, MacRumors, AppleInsider)
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