Sadly, making room for the new Taptic Engine that helps power 3D Touch means a small, 5% reduction in batterycapacity. Apple says that improved power efficiencies in iOS 9 and the new Low Power Mode ensure theiPhone 6S’s battery lifeis similar to theiPhone 6.Other serious changes concern the cameras. Apple has increased the resolution of the iSight Camera ( rear) and Facetime HD camera ( front) to 12-megapixels and 5-megapixels.
That’s 50% and over 300% more pixels respectively – not small numbers considering the 6S uses the same sizesensors.This means sharper, more detailed photos – read more about that in theiPhone 6S camerasection. It also means the iPhone 6S can record 4K video at 30fps, which will be great for that 4K TV you ( probably) don’t own.Finally, we have a new processor – theA9. While there’s plenty still to learn about the inner workings of the new dual-core chip, a core speed bump from 1.4GHz to 1.8GHz heralds some serious performance improvements.