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there will always be some of us that have no problems or issues running gas powered augers. and then there is some who like the light weight and ease of electric or propane.( but they to have their own problems) and not having to mix the fuel..OR NOT (tru-fuel or aspen fuel). and i suppose if your spending most of your time in a permy and dont like being smoked out when your cutting or opening up holes. then there are the new generation of ice anglers that have no interest in learning or running older style augers or equipment. the fact is that most people these days want it fast and easy with minimal amount of excursion. and that goes with most things in life now a days. and thats ok.. to each their own..technology moves on.
The 10" ion has the chipper type blades different from the 8" which from what I understand do better in the dirty ice. They look identical to the blades on my eskimo shark 10". My friend has a 10" ion and i used it quite a bit last year up to 30" ice. It wasn't as fast as my z71 but the ease and convenience was worth it in my opinion. I picked up the ion x 10" this year and haven't had a chance to try it yet. I don't think it has more power then the older models i think its just a better battery. 5 amp hours vs 3 on the older ones. If you like fishing in a 10" hole i say go for it. I have a spare battery and and can't see myself running out of that much juice.
if you're not stuck on the 10" i would look at returning the ion and going with a milwaukee fuel hammer drill, adapter and a hand auger. i've had mine for 4 years and use it all season long, plus run the drill at work the rest of the year. can get about 12-15 holes through 30" ice on one 4ah battery. i just ordered an 8" k-drill auger that is supposed to be the cats pajamas for opening old holes, so hopefully no more bumping the hardside to find fresh ice. i also see they're selling the clam drill plate at canadian tire now. i like mine, keeps the drill up out of the snow when you set it down and eliminates the chance of the auger coming lose in the chuck. the hammer drill with 2 5ah batteries and charger can be had for $300, hand auger $100 and clam plate $100. pricy but still comes in less than any ion i've seen. just something to think about.