I was referring to the nitecore d2. Lol I have two istick that u usually run (50 and 100w) my nitecore seems really nice. Was charging my batteries via USB in my 100w. Except for at work. Here lately I have been using my cf subohm with a subtank mini on top. Just and easy pocketable set. Battery actually lasts all day if I have the 1.2ohm occ in it.