I started using Greensmoke ecigs about 6 months ago. I'm mostly pleased with them but am looking for something a little more substantial and affordable and hope someone here can help. Some info on the way I smoke : I used to smoke roll your own American Spirit cigarettes. About 30 a day. I am a chain vaper. I use it all day. The problems I have with Greensmoke are : The cartomizers last less than a day. So, expensive. I don't get a good nicotine hit with their strongest nicotine level carts. The battery life. I get about 6 hours on a full charge. I still experience nicotine withdrawal after 6 months of vaping. I was thinking about getting something refillable instead of using disposable cartomizers. It must be small enough to fit in my pocket but more powerful than the Greensmoke ecigs. It also must be cheaper than Greensmoke. I currently spend about $135 a month on carts. Thanks so much for reading!