I've just posted this question yesterday! I've got 2 kits from same supplier one blue and another black.Turns out one kit (blue) was actually RN 4075 and another (blue) was real DSE 901.Today I've got 2 attys and 2 batteries from Myvaporstore everything is real 901 parts. Edit:I don't know how to post link to a tread,but if you can find it there is all information you are looking for. A lot of helpful people in this forum!!!