I use a Milwaukee M-18 with a 6" Finbore and 8" Nils. Runs all day and cuts like crazy through ice. The Nils goes through effortlessly. If you get the Milwaukee, you can get a 5amp (standard) or 9 amp battery. The 9 amp never drains down unless you are trying to swiss cheese a lake all day. You will need an adapter for auger to convert it so it can be used with drill. Make sure to get a retainer or clam plate so you don't lose auger down hole if it comes out of drill chuck.