iOS 9 contains several new features related to autonomy. When its new mobile system presenting keynote, Apple said that we could expect an additional run time on average. A great performance, reflecting changes under the hood, but also some new user side.

Let’s start with what is not seen. Apple has worked foundations of his system and iOS 9 should be more aggressive to preserve the autonomy of the terminal on which it is used. Yet we have the details on that, but we can imagine that the processes running in the background will be monitored more closely. And probably cut faster.

Another significant new feature iOS 9 uses all iPhone sensors to “know” that the terminal is placed on a table, screen down. In this case, the screen will remain always off, even if you receive a notification. A great idea because each alert activated until then the screen consumes the battery even if you could not see it. Does the screen will also turn off when the phone is in a pocket? We assume so, but this feature is not yet developed in the first beta and it is difficult to judge.

iOS 9 puts the battery in the spotlight, adding information about her in Notification Center and making it a nice place in the Settings. In the first case, you can add a widget with the state of the battery of the iPhone, but Apple Watch associated as appropriate. If you do not want to have a permanently indicator in the status bar, it is a good solution. As for settings, they earn a section dedicated to the battery on the first screen.


The battery usage statistics also gained in precision. iOS 8 showed a percentage of use for each application or service and sometimes had an idea of ​​the type of use. With iOS 9 always include a percentage, but a tap on the list also displays a duration of activity. The system distinguishes the applications running on the screen, and those that only use background processes.

This is useful to distinguish an application that downloads data and operates in the background (a podcatcher, such Overcast on the screenshot). We can also know that an application is particularly tasty as when it is used only when it remains in the background: Tweetbot is a good example here.

If you really need the best self that is, iOS 9 is based on an idea of ​​the Apple Watch – and competing systems – with a low power mode. This mode can be activated on demand in settings related to the battery and get up to three hours of additional use according to the manufacturer. To activate this mode, it is mandatory to go through the settings, there was no shortcut in the Centre of controls or with Siri. Hope this will change by fall.

Good point however, when one reaches the 20% of remaining battery, iOS 9 offers itself to activate the low power mode. Specifically, this mode disables certain functions that consume energy without being essential. Automatic emails falls off, you must manually update the inboxes. All applications that can recharge their data or download files in the background normally are blocked. The brightness and some animations are also reduced (the wallpaper behind the icons remains fixed, for example).


Motorola DROID Turbo
10h 42 min (Excellent)
Sony Xperia Z3
9h 29 min (Excellent)
Samsung Galaxy Note 4
8h 43 min (Excellent)
Samsung Galaxy S6 edge
8h 11 min (Excellent)
Google Nexus 6
7h 53 min (Good)
Samsung Galaxy S6
7h 14 min (Good)
Apple iPhone 6 Plus
6h 32 min (Average)
HTC One M9
6h 25 min (Average)
6h 6 min (Average)
Apple iPhone 6
5h 22 min (Poor)

Also, the internet connection speed can be reduced, warns the alert. We tried to measure a difference, but the benchs were identical in Wi-Fi as 4G: iOS perhaps become more aggressive 9 on this point over the betas. However, the brightness is reduced much more quickly – within a few seconds – if you do not touch the screen. On this point, the difference is significant, but the screen is reactivated as soon as the key and it is not very troublesome.

It is too early to comment on the effects of these developments, both 9 because iOS has been installed on our terminals and because it is a beta. For now, autonomy seems to have taken a hit: in mid-day and our iPhone 6 Plus Watch our Apple revolve around 40% remaining battery. They were both at 100% this morning, around 7 am. On this point, the next beta will undoubtedly make great progress.

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