There is also a web site in China called e-cig.com They have e9
batteries and cartomizers a lot cheaper. I use to use a red dragon and found this a few months back. It took about 10 to receive it from China. The greencig carts and those for the kr808d-1 will not fit tight. I have used the e9 battery with the cartomziers but the threads don't really match up and they wobble! But in a pinch you can get a decent puff! Hope this helps!!
They also have passthrus!