I've read the entire thread. It appears that neither my OEM adapter nor Kensington 120W slim unit will work with many planes, which provide ~75W only.

On many flights (747s on DL), I've had the laptop not charge properly because 2 seconds after I plug it in, the power "goes out". I unplug the adapter from the laptop, and the seat outlet, then plug the adapter back in (without laptop), the light comes on. However, 2 seconds after I plug the laptop in, the light goes away. I guess this is the outlet tripping out.

I've yet to try some of the solutions proposed here: (turning off the seat massage-er, turning off the IFE (TV screen) and lights.

2 questions:

1. Does anyone know if Dell E6400 (14-15" laptops) will charge (powered down) with ~75W?

2. Any recommendations on a 75W or lower universal adapter/charger? Or at least one that will TAKE 75W and not "trip out" the plane's outlet?