A 14500 Li-Ion is roughly the same size as an AA battery, but that's pretty much where the similarity ends. If you put a 14500 in your radio, shaver or... bedroom appliance... a burning smell will signal the end of your relationship. This is because the voltage of a 14500 can be up to three times higher than an AA – and this is probably a good time to mention that I take no responsibility for any damage or loss arising from the use or abuse of anything I supply.
You do get torches that take both an AA and a 14500 battery but I don't stock any at the moment, and torches like my SC32 Sarge that take a full sized 18650 have shrunk in size, offering twice the brightness and triple the run-time of any AA-sized torch I've seen. If you're keen on a torch that takes multiple supermarket batteries or a full-sized Li-Ion, have a look my cheapest torch, the G1000 Grab, which I sell in bundles of five.
However, if you're dead set on an AA (or AAA) sized torch, drop me a line at email@example.com and I'll do what I can to help.