Oh how a news bite can be spun in any direction to create desired response!
Let me re-write the article:
Apple iPhone 6 to Sport Better Battery Life
The 4.7" variant of Apple's iPhone 6 is expected to carry a higher capacity battery than its predecessor, the iPhone 5s. At approximately 1,850 mAh, this new battery is approximately 20% greater capacity than the 1,500 mAh found in the iPhone 5s.
Undoubtedly, the larger display and greater pixel count of the iPhone 6 display will demand more power than the iPhone 5s, but how much so remains to be seen. By comparison to other historical changes, such as the introduction of the Retina Display, and the introduction of the 4" display, the bump to the 4.7" should not be viewed as anything more than a modest increase in power demand. Additionally, the iPhone 6 is also expected to sport the next generation Apple SoC, the A8, which is if history is any indication, will also improve power efficiency by a measurable percentage.
The end result is likely to be a noticeable improvement to battery life over the 5s, a welcome enhancement for iPhone owners.