Charles,
You need to learn a lot about the current crop of cells. Yes the IBcells have a relatively high failure rate as do all of the high voltage cells. This unfortunately is part of a problem being addresssed by the manufacturers.
However, whoever sold you the Sanyo cells is a bigger crook because these cells are so uncompetitive Sanyo virtually vanished from the market a couple of years ago. Yes they will most probably still show 1.1 volts but that is the best they will be. All other brands are achieving 1.23-1.24 volts which means you will be laps behind.
It has nothing to do with price. The simple fact is that Sanyo are poor performing cells.
This post is not aimed at you but rather the fact that there is a bit of misunderstanding on your behalf. You could give new racers the impression that the Sanyo cells are better ... which they are NOT