Hi Early09 and :welcome:
Currently Nitecore D10 is a very popular 1xAA flashlight and you can find a lot of information around here.
You should however better clarify your needs in terms of shape, user interface, number of levels, etc. in order to enable people to better advise you.
Comparison of D10 to Jet-I MK IBS here:I think the jetbeam are better than the d10 from nitecore? Or you can't compere these two lights? Are the Jetbeam a more thrower than the d10?