Honestly, I think the following paragraph will be my future if I encounter one out in the wild.
I will be waiting for the parts I ordered at the parts counter. I will be bored, walking around the store aimlessly. I will see a LED extension on the rack and think "Interesting idea, I wonder if this LED extension will ever come in handy. I'll go ahead and pick one up to try it out. After all, it doesn't seem to be selling so now it's on clearance for only two dollars so I'm not out much if it disappoints." Then over the next year I will encounter one situation where my task light or headlamp doesn't quite get light where I need it. I will think to myself "Oh yeah, let's try out that new LED extension I picked up". I will get it out of my tool drawer, use it, it will work, and I will temporarily feel like my $2 was well spent. Then over the following year I will never encounter a need for it again and the internal battery will go dead. I will never bother to replace the battery because it either can't be replaced or else it isn't a tool worth buying a new specialty battery for. The extension will end up being a purchase I regret. I will throw it away or sell it at a garage sale as part of a couple dollar tool lot when I periodically go through all my tools and cull unnecessary items to free up space in my tool chests.