This is how to improve your iPhone's battery life

Apple has recently been accused of 'significantly overstating' the battery life of a number of its iPhones, following testing carried out by consumer watchdog Which?.

The group tested the battery performance of more than 50 mobile phones from five different brands, and found that all Apple models fell short of the time the tech giant claimed they would last.

According to its results, both Apple and HTC "appeared to overstate the battery life life length" of their gadgets.

"Apple stated that its batteries lasted between 18 per cent and 51 per cent longer than the Which? results", the report said.

The iPhone XR was found to be the worst performer of the nine iPhone models tested, lasting for 16 hours and 32 minutes, when Apple claimed it can last for up to 25 hours in some cases.

Which? said the testing involved charging brand new, independently bought phones to full battery and measuring how long they lasted when making continuous phone calls.

Apple defended its own measurements, saying in a statement: "We rigorously test our products and stand behind our battery life claims.

"Which? have chosen not to share their criteria so it is impossible for us to judge their findings. We share how we test battery life with our customers, which are available here."

An iPhone battery life can be affected by a number of variables, including connection to data networks, apps and temperature (Photo: Shutterstock)

How to improve your iPhone battery life

The battery performance of an iPhone can be affected by a number of variables, including connection to data or Wi-Fi networks, apps in use, or even external factors such as temperature.