I just received my BB extention, which now allows me to use the 14650 battery. I have been working with the std 14500 and IMR 14500 and could not get a battery to go over 6 hours without experiencing a major drop off in power. Now I have been running the std 14650 for coming on now 9 plus hours and she still hits as hard as the first hit. I am looking to get my hands on a few IMR 14650 and really get to see how that works. I have to say, it was worth the little extra to re-enjoy my BB. Another plus is the extra inch in length makes the BB feel more comfortable in my hand.
