This is a photo of a Dewalt DW9104 battery charger (ie for a cordless drill).
It appeared to be dead but I think I've narrowed the problem down to the fuse labelled
F1 which is located just to the left of the
+ in the photo.
But how do I replace this? It looks like it is in a fuse "holder" which is rigidly attached to the board. I hope that detail is clear enough in the photo.
The accepted answer was correct, it was not an existing fuse holder, just a funny looking (to me) fuse. I clipped the existing fuse out leaving its leads soldered to the board. I then soldered an actual holder to those stub leads (easier for me, than soldering to the board). It now works well!