You have to wonder why they aren't using a quality meter in their pictures. A Fluke isn't really very expensive.

The link that 300SD81 posted looks interesting. Somehow I doubt that you can get new performance out of the old battery, but anything is better than nothing. For a drill battery, perhaps a couple of 12V car batteries in series would do the job as good as NiCads.

They really want you to buy a new drill when your batteries die. Interesting idea.