iPhone 7 has an A10 Fusion processor. What does this mean?
Apple's A10 Fusion features 4-core architecture, providing speeds 2x faster than the iPhone 6.
Two cores are high-performance cores. The other two are low-power cores, which sip just 20% of the power consumed by the high-performance cores. An intelligent controller can save significant battery life by directing simple tasks to the low-power cores.