The iPhone 6 on release date will feature major upgrades that mainly focus on the iOS device's existing selling points - wielding a technically enhanced shooter and a smart battery application.

As other device manufacturers like Samsung and HTC are attempting to impress consumers with 16MP camera sensor on the Galaxy S5 and the HTC One 2 (M8), Apple is reportedly sticking with the 8MP standard that the tech giant had introduced via the iPhone 4S in 2011.

But it doesn't mean that the iPhone maker is become stagnant on its smartphone camera technology, Apples Insider said in a report. On the contrary, the company is unpacking a very much improve shooter in the iPhone 6 - it's just that the focus is different.

Apple is not racing against Android and Windows device makers to deliver the highest megapixel camera numbers, said the same report.

"Apple will likely forego a high-megapixel camera in its 2014 iPhone offerings, in favour of tweaking other image-enhancing components. In other words, megapixels are less of a priority for Apple than overall image quality," Apple Insider added, citing its unnamed sources.

So for the iPhone 6, Apple is likely to impress with larger pixels and faster lens that will allow uses to shoot high-quality images and clips. But the sensor will remain 8MP or just half the 'capabilities' of upscale 2014 flagships.

It is expected that the likes of Nexus 6 and Samsung's Galaxy Note 4 will debut with 16MP shooters.

To amply support the iPhone 6 killer camera is a longer-lasting battery that relies not only on higher battery rating but also on a built-in power manager that smartly predicts the unique usage behaviour of iPhone users.

This fresh technology, according to Cult of Mac, is strongly hinted by a recently published Apple patent titled 'Inferring user intent from battery usage level and charging trends'. More likely, the application is the part of the new features that will be stuffed with iOS 8 that is rumoured for a grand preview at the 2014 WWDC in June.

The application is programmed 'to learn and predict' the usage pattern of an iPhone user then automatically adjust the battery settings or the overall power environment of the device in order to keep the energy juice draining too quickly.

The core function for the app is 'long-term power budgeting', which according to CNET is "concerned with ensuring that the device's power usage over time does not deplete the battery and interrupt the user."

These two new killer features, along with many rumoured specs and features such as a 64-bit A8 chip, a Liquidmetal casing with sapphire glass and coating, a 4.8-inch display panel with Quantum Dot technology and iOS 8, are expected to headline the iPhone 6 release date pegged between June and September 2014.