It’s obvious isn’t it, the op evidently wants to run a battery with only 1/5th of the capacity for massively reduced runtimes. And would likely spend £5-10 on such an adapter instead of spending £8-11 on an 18650….
If you run out of charged 18650 cells, but still have 14500's lying around, I suppose it would be nice to have an adapter lying around.
On a side note, I have 15 good quality 14500 batteries, and really no decent light to use them in. Crelant v11a, and Balder HD1 just don't do it for me, the balder won't even fit the keeppower and orbtronic cells :(
Just buy some plastic rod the rough size of 18650, cut to length then drill 14500 size hole down the middle, I do things like this for other projects with delrin, but there are much cheaper plastics etc about.
tabs
Bort would not spend such money on an adapter (hence budget in the first post), but is seeking the feasibility of building a high quality custom light using a fasttech host and readily rechargeable NiMH, the target market not being conducive to lithium