The upcoming ultra-thin iPhone 17 Air, rumored to measure a mere 5.5mm at its slimmest point, could become one of the first of Apple’s smartphones to adopt advanced silicon-anode batteries. This development hinges on Apple’s major supplier, TDK, which is reportedly accelerating the shipment timeline for its new generation of these high-density battery cells.
TDK CEO Noboru Saito recently indicated that the company is pushing shipments forward to the end of June from the previously planned September quarter. This expedited schedule, Saito suggested, could allow some handset makers to integrate the technology into products launching this year. This timeframe aligns directly with Apple’s typical September launch window for new iPhones and specifically with the expected debut of the 6.6-inch iPhone 17 Air, which is anticipated to replace the current Plus model in the 2025 lineup.
TDK’s third-generation silicon-anode batteries utilize silicon for anodes instead of the traditional graphite, enabling them to store approximately 15% more energy within the same physical volume. This increased energy density is particularly valuable for maintaining adequate battery life in a device as exceptionally thin as the rumored iPhone 17 Air, where internal space is at a premium. Adopting this technology would mark a notable strategic shift for Apple, which has historically relied primarily on chip and software efficiency rather than significant material changes to enhance runtime.
While the adoption of silicon-anode technology offers significant potential for power in a smaller package, reports regarding the iPhone 17 Air’s expected battery performance have presented a mixed picture. Some sources have suggested the device might have “worse” battery life compared to previous iPhone models due to its slim design constraints. Conversely, others have offered a more optimistic outlook, stating that battery life could be “on par with current iPhones” thanks to various hardware and software optimizations Apple plans to implement. Analyst Ming-Chi Kuo has also noted that the iPhone 17 Air will feature a “high-density” battery, further fueling speculation about the potential benefits of the new technology.
Beyond the battery itself, other design choices for the iPhone 17 Air could also contribute to managing power consumption and optimizing space. Rumors suggest the device will incorporate Apple’s more power-efficient C1 modem and potentially omit the Ultra Wide camera, decisions that could both reduce power draw and free up valuable internal real estate for a larger battery cell within the constrained 5.5mm thickness.
Silicon-anode batteries have been a focus of research and development for years, promising significantly higher energy density compared to graphite. While pure silicon offers immense potential, its tendency to expand and contract during charging cycles has been a challenge. Companies like TDK have addressed this by using engineered silicon composites or coatings to improve durability, suggesting the technology is now viable for mass production in devices like the iPhone.
(via DigiTimes)
