Apple, in a statement to TechCrunch on the allegations that Samsung-made A9s get worse battery life than TSMC-made ones:
Certain manufactured lab tests which run the processors with a
continuous heavy workload until the battery depletes are not
representative of real-world usage, since they spend an
unrealistic amount of time at the highest CPU performance state.
It’s a misleading way to measure real-world battery life. Our
testing and customer data show the actual battery life of the
iPhone 6s and iPhone 6s Plus, even taking into account variable
component differences, vary within just 2-3% of each other.
Real-world testing seems to bear that out.
The 2-3% difference Apple is saying it sees between the battery
life of the two processors is well within its manufacturing
tolerances for any device, even two iPhones with the same exact
processor. In other words, your iPhone and someone else’s iPhone
with the same guts likely vary as much as 3%, regardless of who
Basically, if you can tell the difference in real-world usage
between the two processors, you should take a Voight-Kampff test.
★ Thursday, 8 October 2015