I recall reading about someone using a 10in auger on an Ion. However, how many holes you could punch im not sure.
To put it into perspective, i know some guy who use a power drill and an 6in auger. They get about 20ish holes on one battery thru a foot of ice.
You would think 10-15 holes would be possible for an 8in auger right?
Wrong, they barely get 1-2 holes with the 8in. The extra juice needed to drill the bigger hole drains the battery.