Apple on Thursday issued a statement saying the difference in battery life in the A9 chips supplied by TSMC and Samsung for use in the iPhone 6s is a mere 2-3%.
While various test and reports published on the web show a difference of as much as two hours in the difference between chips manufactured by the two suppliers, an Apple spokesperson told TechCrunch that the difference is small.
With the Apple-designed A9 chip in your iPhone 6s or iPhone 6s Plus, you are getting the most advanced smartphone chip in the world. Every chip we ship meets Apple’s highest standards for providing incredible performance and deliver great battery life, regardless of iPhone 6s capacity, color, or model.
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.
Accounts on the web have pointed to TSMC-based iPhones lasting longer on battery power than Samsung-powered devices.
Apple uses both companies to supply the A9 used in the iPhone 6s and iPhone 6s Plus, likely to have enough supply in case of production problems at one supplier.