The ability to communicate with Siri without even waking your iPhone will no longer rely on mains power with the iPhone 6s, according to a new report. The "Hey Siri" function is expected to work at all times on Apple's next-generation smartphones.

First introduced with iOS 8, "Hey Siri" is a lot like the "Ok Google" feature on Android, and it allows iPhone owners to begin communicating with the virtual assistant without waking their device or pressing any buttons. Until now, however, it has only worked when the iPhone is charging.

But according to a report from AppleInsider, that's going to change when we get the new iPhone 6s and iPhone 6s Plus.

The new devices, which are expected to get their big unveilings during the Apple keynote later today, are rumored to bring always-on "Hey Siri" functionality, allowing owners to use the feature even when their iPhone is unplugged from mains power.

Furthermore, "Hey Siri" will reportedly work at all times throughout the operating system — even when you're using other apps or playing games. This will be particularly useful if you want to find information while composing a message or email.

Other Siri improvements that Apple has already confirmed for iOS 9 include contextual suggestions and proactive features that allow the virtual assistant to recognize what a user is doing. So, when you're reading an email, for example, you can say something like "remind me about this later" to create a related reminder, and Siri will already know what the reminder should be connected to.

Apple's event kicks off at 10 a.m. Pacific today, and you'll be able to watch the whole thing live on Mac and iOS devices with Safari, and Windows 10 PCs with Edge. You can also tune in on Apple TV.