Apple is ready to release a 4.7 inch with a 1810mAh battery. They recently had to add a second lighting source for the backlight because one backlight wasn't enough. Remember, this is all conjecture on my part, but what if Apple now knows that the thin design will not permit it to put a battery in that will give "normal" use. By "normal", I mean average use to last a full day without a re-charge. Do you release the phone anyway? Would there be any grounds for a class action suit? Probably not, because technically it is not "defective". It just can't get through a full day. Or, do you halt the release of the 4.7 and just release the 5.5 and redesign the 4.7 to include a bigger battery? Tough questions, lots of conjecture on my part, but there may be some truth buried in there.