I thought I got rid of all my 18v DeWalt stuff. I just found these adapters, or I would have listed them earlier .
These are NOT "cheap copies" these were bought local from Home Depot.
I have two; $30 Ea, plus shiping or picked up.
You MUST use a 20v charger to charge your batteries, you can NOT charge batteries through the adapter. If you want/need a DeWalt 20v charger:
I have several, $25 Ea. I have to check for model number of charger if anyone is interested.