2020 Razer Blade Stealth 13" Power/Charging Issue in Airplanes

Recently, I found out that my Blade Stealth (2020) requires 100W power supply to charge. In domestic planes (United States), I just can't get the life of me to get my laptop charged. Even if the battery is fully charged and the performance is maximum, I still get lower frame rates because it's not charging while I'm onboard. The discussion in other forums is that average planes can only supply the power up to 75W, whereas my current stock power adapter requires 100W. Is there a way to get around this issue? Longer trips like international or long domestic flights require ample amount of charging inside the plane - which I'm obviously not getting. How did you find a way to charge your laptops that have higher than 75W? Some suggested the lame 'max-charge-in-the-airport' and use it until power eventually gives away after about one to two hours, but in long flights this is never ideal. My friends suggest power banks but they are essentially batteries and I'll most likely get questioned by the airport security to carry one with me. Hopeless here. Thoughts? And any recommendation on a lighter, less heavier 100W power adapter that I can get out in the market? Thanks.