Originally Posted by PIT_Flyer
...1. I'm flying CO and the 777 has power adapters in certains eats. CO's website doesn't mention what the output of the power adapter in the seat is. In the event that the seat power adapter doesn't put out 90W, can I take the battery out of my notebook and use only juice from the seat power adapter instead? If not, what are my options? ...
There's a big difference between "needs 90W" and "happens to come with an AC adapter rated for 90W." While no computer vendor gives its systems AC adapters rated for much more than necessary, since that costs money, the 90W allows for charging the battery at a reasonable rate as well as operating the computer under worst-case load conditions.
You'll be fine. Your battery probably won't charge much while you're using the computer, but it won't discharge much either. There's no reason to remove it. If you want to play it safe, turn down the screen light a bit, turn off your audio, turn off your wi-fi (which you're supposed to do in flight anyhow), and don't burn CDs. More drastic power management measures probably aren't needed, but feel free to use them if you want to be certain.