Originally Posted by paperwastage

https://www.flyertalk.com/forum/unit...questions.html

looks like 75W is the limit.

did you connect charger to computer before plugging into the seat outlet? if not, wondering how much surge the charger uses to cause the outlet to cut

you have two options

1) test your luck with a lower wattage charger -
hopefully the initial surge doesn't cause the outlet to cut. your laptop may charge slower (or just drain slower, or not charge at all? depends)

2) buy something like this (you need to hunt for one that supports outputting 135W)
https://thewirecutter.com/reviews/th...supply-so-far/

note that it will be heavy, capacity must be under 100watts and it CANNOT travel in the aircraft hold (aka if you are forced to gate-check your carryon, you must hand-carry the portable battery onto plane)

3) (maybe) - HP (and Dell and Lenovo) sells their own custom portable charger, but likely your laptop draws too much power and isn't supported

eg: https://www.amazon.com/Envy-15t-3200.../dp/B00M0Z8CF8