Is it okay to use a grounded to 2 blade plug adapter with my UMBP?

[Tronic]

Sorry if the title is a little vague, I'll try to elaborate. I'm flying American to Guatemala next month and will be taking my 15" UMBP along. The 737 has in seat 110V AC power but they only accept two blade plugs. I realize that I can use the two blade adapter that came with my Magsafe but I have a bad feeling that the large brick will either get in the way or render the plug inaccessible.

Is it safe to use a grounded to two blade plug adapter if the above is the case?

 

[alphaod]

That's probably fine seeing that when you use the 2 prong duckhead it's just the same.

 

[Relznuk]

That's probably fine seeing that when you use the 2 prong duckhead it's just the same.

+1. Should be fine.

 

[Tronic]

ty. I realize that since the port are limited to 75W, I will not be able to charge my UMBP at 85W, but that I will be able to maintain my current charge throughout the flight. However, I did read that some people couldn't even get that to work due to their power savings settings. Should it just be plug and play or will I need to come prepared with tweaked power settings?

 

[Freyqq]

from what i read previously, it works as long as the battery is at full charge already so it doesn't have to charge and power the laptop at the same time..which draws the full 85W