ORIGINAL: everydayflyer
Around 4 years ago some vendors claimed to have a source for A123 cells of better than DeWalt quality. It would appear that Steve do9es in fact have a source for a better grade of A123 cells. Perhaps these better / more consistant cells are the ones now being manufactured in the A123 Systems Enerland Plant which they purchased about a year ago and the DeWalt cells are now two or more years old.
I would expect improvements to come with time, but my 3 year old A123s from DeWalt are still going strong. You have done some meaningful testing on A123 as a baseline, I hope you can get some of the new ones to verify if they are in fact "new and improved".