iPhone users who updated their devices to the new iOS 26 have reported excessive and accelerated battery drain in the days following installation. The issue generated a significant volume of complaints on online forums and social networks, leading many to question the stability of the new version of the operating system.
In response to the growing concern, Apple has officially confirmed that an increase in power consumption is expected shortly after a major software update. The company detailed that the phenomenon is temporary and is directly linked to optimization processes that run in the background to adapt the system to new resources and user data.
Despite being a recurring behavior in new versions of iOS, the impact on iOS 26 seems to be more pronounced. Especialistas point out that the introduction of more robust artificial intelligence features, such as Apple Intelligence, is the main cause for the higher energy demand observed this year, overloading devices during the adaptation period.
The post-update reindexing process
The technical explanation for rapid battery drain shortly after installing a new version of iOS lies in a set of intensive tasks that the system performs in the background. According to Apple’s support documentation, the iPhone begins a complex data reindexing process that can last 48 to 72 hours. Durante this period, the device’s processor works continuously to reorganize files, scan the photo library to identify faces, objects and scenes, in addition to rebuilding application databases such as Mail, Arquivos and the Spotlight search system. Essas operations are essential for new resources to work correctly and quickly. Como A direct result of this intense activity, the device may heat up more than normal and experience considerably higher battery consumption, even when not in active use, as the processor is operating at high performance to complete the optimization as quickly as possible.
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Apple intelligence as the main factor
The highlight of iOS 26, the Apple Intelligence artificial intelligence suite, is identified as the main responsible for the increase in energy consumption. Diferente Of many AI solutions that rely on cloud servers, much of the Apple Intelligence processing occurs directly on the device. Essa approach, known as “on-device processing”, guarantees greater user privacy, but requires substantial computing power from the iPhone chip.
After the update, the system needs to perform an initial analysis of the user’s personal data to build the language models that will feed features such as the creation of Genmojis, advanced writing tools and a more contextual Siri. Essa Initial calibration task is extremely cumbersome and consumes a significant amount of battery. Enabling these features, therefore, adds an extra layer of background processing that did not exist to the same extent in previous versions of the operating system.
Native app updates
In addition to Apple Intelligence, several native system applications received important updates that also contribute to initial energy consumption.
The Fotos application, for example, now uses more sophisticated algorithms to group images, create collections and generate “Memories” automatically. Para this, it needs to rescan the user’s entire photo and video library.
Likewise, Apple Music implemented new smart playlist functions that require an analysis of the user’s music history and preferences. Outros apps, like Mapas, also undergo data optimization processes to enable new visual and navigation features.
Impact on older iPhone models
Although high battery consumption is a temporary side effect on all compatible devices, the impact is felt more severely on older iPhone models, such as the iPhone 12 and iPhone 13 lines.
This is because its processors, although still very capable, need to work longer and with greater intensity to perform the same optimization tasks as newer chips, such as those found in the iPhone 16 line.
Learn more: Accelerated battery consumption in iOS 26 is confirmed by Apple; learn how to optimize your iPhone
The architecture of newer processors is more power efficient, allowing them to handle post-upgrade workload faster and with less impact on battery life.
Consequently, users of older devices may notice that the battery normalization period extends a little longer, and the device heating may be more noticeable during this initial system calibration process.
Official recommendations from Apple
To mitigate the inconvenience caused by accelerated battery consumption, Apple offers a clear recommendation to users: patience. The company suggests that for the first few nights after the update, the iPhone is left connected to the charger and to a stable Wi-Fi network.
This practice allows the operating system to take advantage of the period of inactivity to perform indexing and optimization tasks more efficiently, accelerating the completion of the process and the normalization of battery performance without affecting the user experience during the day.
What to expect in the coming days
The expectation is that, after the critical period of up to 72 hours, the iPhone’s battery consumption will return to normal levels. Once all background optimization processes are completed, the system will stabilize and the device’s autonomy should be equal to or even greater than that of the previous version of iOS, thanks to the efficiency improvements implemented by Apple.
Compatibility and exclusive features
Importantly, Apple has limited the availability of Apple Intelligence’s most demanding features to newer iPhone models. Essa strategic decision aims to ensure that the user experience is not compromised by hardware limitations.
On the same topic: Apple admits excessive battery consumption in iOS 26 and reveals how to optimize your iPhone right now
This way, older devices, although they receive iOS 26, will not have access to all AI features, which also serves as a way to protect the performance and battery life of these devices, avoiding overloading them with tasks for which they were not optimized.