Between the release of the iPad 2 last year and the announcement of the new iPad yesterday, Apple has nearly doubled the capacity of the battery, taking it from 25Wh to a massive 42Wh. Measured in milliamps this boosts the battery from 6944 mAh to a monstrous 11,666 mAh.
That’s a massive, massive jump in the same basic space (ever-so-slightly bigger). This is perhaps the most significant thing only briefly mentioned yesterday because the ramifications are huge for many other products.
As John Brownlee notes:
That means that Apple’s work in battery density is not only going to open the door to an LTE iPhone 5, but could give us all-day MacBooks sooner rather than later.
During the keynote, I noted that I remembered the days when my laptop battery would give out before an Apple keynote was over. It was only a few years ago. Yesterday, by the end of the event, my MacBook Air was at 65%. What if Apple is close to a 20-hour laptop?