Since this site has been so helpful, thought I'd add to the knowledge base. After much sleuthing and some trial and error, the 21st Century Smoke battery is most likely a Smores M601C. What I do know for sure is that the empty, refillable M601 cartomizer fits this battery. The only place that I have been able to find this cartomizer was at electronic-cigz.com
The nice thing is that if you like this battery, this site also has accessories that 21st century smoke doesn't have, such as car charger, PCC pack, colored batteries, etc. They also sell USA made e-juice. The site doesn't allow you to select a nicotine level, but they do sell their juices with nicotine. You just need to type in the nicotine level (24 mg, 16 mg, 8 mg, 4 mg) in the comments box at checkout-if you don't-you're probably going to get 0 nic.
I read a previous post where somebody said that since they ship from Canada, it took forever to get their order. I didn't have this problem. I ordered on the weekend and my order arrived on Wednesday. Also, they charged true shipping rate, $2.00, not some standard flat rate shipping fee. Hope this info helps somebody out.
The nice thing is that if you like this battery, this site also has accessories that 21st century smoke doesn't have, such as car charger, PCC pack, colored batteries, etc. They also sell USA made e-juice. The site doesn't allow you to select a nicotine level, but they do sell their juices with nicotine. You just need to type in the nicotine level (24 mg, 16 mg, 8 mg, 4 mg) in the comments box at checkout-if you don't-you're probably going to get 0 nic.
I read a previous post where somebody said that since they ship from Canada, it took forever to get their order. I didn't have this problem. I ordered on the weekend and my order arrived on Wednesday. Also, they charged true shipping rate, $2.00, not some standard flat rate shipping fee. Hope this info helps somebody out.