These are made for the flexvolt 54v Dewalt battery’s but I use them one all my standard 18v dewalt battery’s, you do have to cut two small tabs off to fit a standard battery but I knew that before buying and they work great.
Bought for DCB184 battery. This battery must be, slightly, different from DCB546 or 547 therefore:-
I had to remove two plastic posts, with a junior hacksaw, from the end of the safety cover, so that it would fit into place and engage with the catch. A matter of a few second work and now the battery contacts are covered and the catch hold the cover in place.