The iPad Air may be smaller and much thinner than any full-sized iPad before it, but Apple still promises the same great battery life. That translates into up to 10 hours of web surfing or video watching on Wi-Fi, 9 hours on cellular (if you have a cellular model), and a whopping 24-hours as a personal hotspot. In other words, a lot. In our early tests - we've only had the iPad Air for a few days so far - it's predictably living up to those levels. However, if your iPad Air isn't getting the battery life you expected, if it's not matching the levels you got with your preview device, or simply not working the way it should, here's how to fix it - and how to get the most out of it!