Honestly, I prefer that anyway. I've got no shortage of devices with plenty of my own media, and now I don't have to be stuck 12" from a screen I can't reliably turn off, that will be shining advertisements and redundant safety lessons in my face when I'm trying to sleep.
Just buy a 10-20Ah portable battery and you're set for mobile devices. I can weather a 10-12h flight with one of those and my iPad/iPhone. If you have a recent laptop, you should be able to weather 5-8hr for work; I seriously doubt you could get better on even an international flight.
Extra bonus is having the battery available the rest of the time. My phone's battery life isn't quite what I'd desire, so I just keep a spare ~10Ah battery in my purse. It gets used maybe once a week at most, but it's worth it for those occasions.
