I started looking for an auger I could throw in the airplane a couple years ago. Last year I found a Nils auger at the suggestion of a Facebook friend in northern Minnesota. It took a while, but Cabelas finally had one in stock at the end of the season last year. After using it once and realizing how easy it goes through the ice manually I decided to modify mine so I could try it with an electric drill. I welded an old piece of a worn out allen wrench to the top of the auger and tested it out with a Dewalt 20v LiIon drill. It worked flawlessly! I drilled at least 10 holes and reopened about 10 other holes and the drill was still showing a full charge when I left. With the small allen wrench only sticking up an inch or so I can also still use the manual handle if the drill would happen to wear out. I would highly recommend the Nils if you need a very good lightweight auger for any reason!
Here is a video of it in action with about 18" of ice
And here is a pic of the modification. The toughest thing was making sure that it was square and centered so it wouldn't vibrate when drilling...