I travel a lot by air and have run into a problem with my 2016 Macbook Pro 15": it draws too much power for in-seat charging on United Airlines (75 watt max). Since my journeys have me in transit up to 30 hours at a time, this is a major productivity killer.
My 2015/2013 Macbook Pro's did not have this problem even though their power supplies were rated at 85w (18.5v/4.6a). The 2016 has an 87w (20.2v/4.3a) power requirement. I'm not really sure if that's enough of a difference to make a difference but it seems to.
Is there a way to power a 2016 MacBook Pro 15" on an airplane? I'm open to external battery options, but I can't seem to find USB-C external batteries that work with the 2016 MacBook Pro 15".