The iPhone 6s uses a smaller battery than its predecessor, a teardown of the smartphone has revealed. A customary part of major device launches, the teardown by iFixit has discovered the battery inside the iPhone 6s is a 1,715mAh unit, slightly smaller than the 1,810mAh version used in the iPhone 6, with the addition of the new Taptic engine to the device likely to have forced Apple to reduce the physical size of the battery itself.
