In fact, in one key metric, battery life, the Air 2 actually regressed from the original Air. In my tough battery test*, it lasted 10 hours and 37 minutes, exceeding Apple’s 10-hour claim. That’s quite good, better than most other tablets. But in 2013, the original iPad Air turned in the best tablet battery life I’ve ever seen on my test: 12 hours and 13 minutes — about 90 minutes longer. And earlier this year, Samsung’s latest similar-sized slate, the Galaxy Tab S 10.5, lasted 11 hours and 14 minutes in the same test.