This won't translate directly to extended screen - on time given other variables, but anywhere between a 25 to 33 percent
battery life improvement seems achievable and would be very welcomed by power users.
Not exact matches
Apple also says that the new phones have «the longest
battery life ever of an iPhone», but the actual
improvements seem as incremental as always.
It's worth to mention: Windows can throttle inactive programs, Windows runs on ARM64 architecture now,
battery life improvements, spontaneous reboots caused by USBhub.sys
seems to be fixed.
The net result
seems to be a
battery life improvement of approximately 50 percent.
It
seems like every new OS release and every new phone talks about better
battery life,
improvements to applications running in the background, and other things, but rarely do we see a phone meet or exceed expectations without dire consequences to user experience.
Along with all of the
improvements to
battery life, Siri, search and stability, which affect all devices and screen sizes, iOS 9 really
seems tailor made for the iPad.