I discovered that my old 2D maglite was completely trashed yesterday. One or both of the batteries had leaked and swelled, locking them into the barrel of the light. After attempting to disassemble the unit using instructions from Take-It-Apart, I realize that the light was a hopeless case. The acid had eaten away at the barrel of the light and I was going to have to destroy most of the internals just to get it out. Oh well, time to get another one anyway.
In doing the research on that, I stumbled across flashlightreviews.com. It's a great site and has lots of data amidst it's product reviews.