In my experience, I started with two kr808 pcc kits and the battery does not recharge fast enough to get vaping again for me. I wasn't able to quit smokes til I got an eGo and another riva 510. Its good to have a backup or two, I rarely good through more than three batteries a day. My pops had kits from smokeless image and its just harder to get replacement parts for it other than at their site which is pricey. He wasn't able to quit til I got him a t-rex carto kit. Got his from liberty flights, it has boge cartomizers which have a pretty good hit to them and are easy to refill. I've heard good things about boge cartos, though I can't say from my own experience since I'm more of a dripper.