Using it while flying will be complicated by the fact that all airlines have banned the use of power banks. If the onboard USB socket isn't very powerful then you'll only get an hours' use.
Using it while flying will be complicated by the fact that all airlines have banned the use of power banks. If the onboard USB socket isn't very powerful then you'll only get an hours' use.
Source?
Last I checked I'm allowed 100Wh of power bank on a flight. And for flights where that's not enough I'm used to having a (~100W) socket.
I can confirm that all the flights I have been on this year we were told not to use power banks. You can have one with you (well you have to since you're not allowed to check large lithium ion batteries) but you aren't allowed to actively use it.
100 W sockets? All the flights I've been on that provided power have had a really low current USB A port that can barely keep my phone from discharging when the screen is on.