And some people don't read the articles carefully, and argue against things that aren't even in there, based solely on their own opinions, which are, of course, beyond reproach.
I don't really care that much about the battery debate, but to clarify, the articles' author specifically warns AGAINST deeply discharging a lead acid battery. The "exercising" mentioned/suggested is a very mild discharge (of 1 to 2 volts of 12) and the article explains the effect/benefit of it. I can't be certain to the true authorship of the article cited, but it looks to me like it was posted by a HAM radio club.
If I recall correctly (which maybe I don't) the original inquiry asked about why it is bad for motorcycle batteries to be fully discharged and not for toothbrushes to be fully discharged and that was the question I was trying to address. Somehow, this quickly (as is often the case) turns into an "I know more than you do" debate that has nothing to do with the original question (and, frankly, a point I'm more than willing to concede.)
Here is another link that talks about lead acid batteries and exercise (it's much shorter Easy!) that you can read and attack:
http://www.evdl.org/pages/hartbatt.html