YouTube is now full of people either rebuilding these lithium batteries, using the cases and contacts for a different power source (including an AC conversion!), and salvaging them for other uses. I have done some of it successfully already with some brands, but I don't have time to use all these different brands, so am offering a few here for fellow "makers" on Craigslist.
It is "used once" relatively new 5.0 Amp Hour Black and Decker LBX20 20v 20 VOLT lithium ion battery. Good for the case, terminals, and rebuild. Cells of unknown condition or problem. It registers 1.1 volts at the pos/neg terminals, so is not shorted. Presently does not seem to take a charge. Even the salvaged lithium is worth more than this.
If you are a "maker" or rebuilder, I also have another dead 20V of the Skil brand / design.
do NOT contact me with unsolicited services or offers