You guys are all wrong.
There are two factories that make the DSE-901 models.
The original DSE-901 comes from the factory that makes the DSE model. If you look at the bottom of the battery, there should be SLB printed on it.
However, there is another DSE-901 from the makers of RN series, which is originally known as the RN4075, has renamed it's manufacture model to DSE-901.
This particular replica has an overclocked atomizer that runs with 15% higher current, producing more vapor. If you look at the bottom pf the battery, it should have something like SH printed on it.
I also believe the black and the pink DSE-901's are variations of the RN4075. The original DSE-901 from the DSE factory only comes in white.
Feel free to ask me any questions. I am connected to various e-cig factories in China.