Apple CEO Tim Cook has used interviews given during Hour of Code demonstrations yesterday to address several different subjects, ranging from the encroachment of cheap Google Chromebook in the education arena to the importance of initiatives like Hour of Code, and also spent some time defending and explaining the rationale behind its latest accessory, the Smart Battery Case for the iPhone 6 and 6s. While the accessory has caught flack for its "hump" design, Apple says the case is intended for occasional use only.