A lot of conversation about this - I recently purchased an Ion with the 8" blade and really like it a lot. Over the weekend I borrowed a 10"blade for the weekend and used it for Lake Trout fishing in Ontario. The Ion performed wonderfully. Not as fast as the 8" blade but fast enough for me. I only drilled about 10 holes before charging so I can[t comment on how many I would have gotten before the battery drained. Overall very happy with it. Regarding the battery, keeping it warm was not an issue. As others have mentioned, a simple soft sided cooler with a hand warmer kept it toasty all day.