In all honesty I wouldn't baton with a folder, at least not a SAK. For $10 you can pick up a mora or probably a multitude of other solid fixed blades that will baton with ease all day long. Even if they do break they're much cheaper than the SAK.

The large saks are good knives and probably could handle light batoning, but I just don't think it's worth it to risk breaking the knife and possibly injuring yourself; especially when there are much cheaper options out there that are better for that purpose.