Hey man, I got rid of the Sigelei #20 a long time ago, and you probably should too because it suffers from a pretty bad, and unsafe, design. If you take a paper clip and touch the outside of the battery tube below the atomizer and touch the other end on the top of mod it will fire. This is bad especially if you happen to have it in your pocket, or anything really, and the mod makes contact in the right place with another metallic object, it could constant-fire the mod and heat the battery enough to explode. It's unlikely but still possible, which is why I returned it. The shop I bought it from (VaporTekUSA) was kind enough to swap it for the Sigelei 19, which I like a lot more.