21 hours when watching movies. When doing real work, I get a good five hours out of my MacBook Air, whereas I'd get maybe one hour out of my Dell. If you actual

21 hours when watching movies. When doing real work, I get a good five hours out of my MacBook Air, whereas I'd get maybe one hour out of my Dell. If you actually have work to do, and you're stuck in the arse end of a coffee shop or airport, then you can still do meaningful work for hours.