There is a link to an article by James Garry (which is in the 2nd article linked in your original post). That website no longer exists, and the webarchive version was missing most of the pics/graphics. But a little googling turned up James Garry's new website, and he still has that article online, which has a lot of good information: http://www.bipbip.info/jg/mod1.html It's for Type II batteries, but answers a few questions that the other articles didn't.