UV light and visible range

[Mandrake50]

I did a quick search and it seems that the T2 UV will run on AA cells.

Convoy T2 vs S2 UV brightness and runtime

I’ve been trying to buy a UV flashlight. I’ve seen good reviews of the S2 and S2+ but I haven’t seen any of the T2. A major problem with UV emitters is the high Vf, causing it to stop working when the voltage drops below ~3.7V, so you can effectively only use only less than half of the battery. The T2 is interesting in that it claims to support using AA, implying that it has a boost driver since there is no way to run a UV emitter directly with an AA cell. I intend to use 14500 cells, but I’m no…

You will get less ultimate brightness and less runtime. But it may work OK, depending on what you need to do with it.
Do you use NiMh (example Eneloop) cells for anything else? they would be much better than Alkaleek AAs. If you do use them, you must have a charger… Or maybe pick up a cheap charger that takes 14500s and a couple of them. I have seen the little single bay chargers that take USB C input for under $10. 14500s under $5 per. So for under $20 you would be set.

Or buy a TS10 with battery and charger for around $15 … like getting the TS10 for free. Of course, you probaly want a couple of spare 14500s… Yeah, more of the old rabbit hole… SIGH.