I actually emailed Cateye customer service and they responded. They didn't come out and admit that their cheaper computers get interference from LED flashers. But they didn't deny it either and basically said that there are compromises with computers at that price point. They didn't mention loose batteries but rather, suggested upgrading to a more modern digital model.

I suspect they are well aware of this issue but don't have any alternatives at that price point. So they just keep selling the same old stuff they have been selling for 20+ years.