I use the KR808D-1. It's easy to use and effective. I recently bought a PCC for it from Eastmall. So far this is the only PCC I have found for this e-cig. The PCC charges at least as fast if not faster than the wall charger. Unfortunaley, it broke after ~ one week of use. It's weakness is in the way the wires connect to the charging socket. The socket pivots about a pin and the wires must move to accomodate this motion. There are two wires. One is soldered to a lug internal to the opposite end of the socket. The other wire is soldered to the casing on the same side. The whole mess is covered with an adhesive to try to prevent wire damage. The wire that broke was the wire attached to the casing. On this wire the adhesive covered the solder joint but did not cover any of the wire insulation. The flexing of the wire caused it to break in between the solder joint and the beginning of the insulation. Any stranded insulated wire put in this situation is going to break sooner or later. if the adhesive had actually covered part of the insulation it may have lasted longer. My advise to those who own these or are considering purchasing one is to rotate the socket as little as possible. I'm pretty sure that Eastmall would have allowed me to return the unit but I decided to investigate instead.