iOS 9 will give your iPhone up to 3 extra hours of battery life

Your iPhone battery will last longer with iOS 9.

At WWDC 2015, Apple senior vice president of software engineering Craig Federighi announced iOS 9 will extend battery life on iPhones by one hour. Another low power mode will extend battery life up to three more hours on top of that

The feature will be accessible via a new low-power mode. Android smartphones like the Samsung Galaxy phones have had special power-savings modes for a while.

Federighi didn't specify what the extra three hours actually referred to. Three extra hours of talk time? On Wi-Fi? On a 4G LTE connection? We'll update as we find out. Read more...