Nice review. I wish JoyE would start shipping them with a straight cord vice a angled one. They must be running out of the "stick" cords (angled) by now.
Good recommendation wrt not using them with LRs. I know a lot of folks do, but they shouldn't. 900 mAh is better but still not there. You need a batt capable of delivering 3A which is basically a minimum of a 14500 IMR or Li-Mn (orange). They can be used with LRs (eGo batts) but expect reducing the life expectancy of the batt by 1/3-1/2.