I have been using my dse905 V3 for about a week now. Sort of a love hate relationship. I love the fact that for a mod it is very comfortable in the hand, easy to use and the battery lasts all day long but even at full charge it just does not give the output of either greencig or kr808d1 standard batteries. Since the dse905 batteries are 900 mAh at 3.6 volt I expected output to be equal to the standard batteries. This problem is the same with both 901 attys and kr808d-1 cartomizers. Switching the same atty or carto between the 2 gives a very different level in both vapor and throat hit. Can anyone explain the difference?