Each iPhone is launched with a outstanding feature. For iPhone 16, it is Apple Intelligence. Unfortunately, Apple Ai seems to be incomplete since its launch. Despite improving some features, this feature has significantly improved the battery life of the phone.
Apple Intelligence is harmful to the battery

To ensure effective artificial intelligence, running it on the device and sometimes transferring the server is essential. This is a approach that many equipment manufacturers have applied. This helps respond quickly, effectively and in detail when needed.
However, the aspect of the device requires the phone to work more. Not to mention, it even needs more high -power hardware. That's why Apple upgraded iPhone 16 and iPhone 16 Plus with A18 processor, and 8GB RAM to support AI -based features.
Using Apple Intelligence will bring about 3GB of additional data containing models that make up your memory. After that, these files are constantly accessed to provide AI results. The simplest example of this – and perhaps the most effective example so far – the Notification Summaries.
This feature condenses all notices into moderate size texts. This feature can read images and describe them or analyze many long texts to describe one or two lines. This feature is useful, but pays the price by battery life.
Turning off Apple Intelligence will improve the iPhone battery life by about 25% (equivalent to a decrease from the need for two full charging cycles to a day and a half charging cycle).
Note: Phone charging from 0 to 100% is calculated as a charging cycle.
The screenshot below displays two days – one day when this feature is enabled and one day when not on. To see the biggest difference, pay attention to the color bars and then the battery percentage and the time axis of using the screen to the right.
The first screenshot displays the battery when turning on Apple Intelligence and the second photo is when it is turned off. The camera is in both days with almost the same time. However, when off Apple Intelligence, the energy level used is about 20%less. These installation changes have been tested during January 2025.

Do you miss anything when it turned off Apple Intelligence?
As written earlier, the biggest AI application on the iPhone is a summary of the notice, although many people report that they may be right or wrong, depending on the case.
But if you use your phone to record videos for your social networking sites, then turning on the power and ready to use is definitely what you want to see rather than the scary red battery icon to only 10%. So you probably won't really miss Apple Intelligence.
Its direct impact on phone experience with most users is very small. In fact, the biggest thing you can miss from Apple Intelligence is the new Siri animation.
The battery strength improvements have been continuously increasing in recent years, although most may be due to software updates that bring optimization. However, turning off Apple Intelligence is a simple tip that you can easily use if you need a few more hours of operation on your iPhone.