Although the new iPhone 6s and iPhone 6s Plus don't look all that different, Apple has sneaked in a few major hardware changes. 3D Touch was one of the big announcements, which allows the iPhone to determine how much pressure you apply to the screen and display shortcuts and other features accordingly. However, this enhancement appears to come at a small cost: battery size. In a video introducing the iPhone 6s family, Apple briefly flashes the battery capacity of the base model. Its 1715 mAh rating is a touch lower than the 1810 mAh battery in the iPhone 6.

http://www.engadget.com/2015/09/10/i...aller-battery/