It looks like an eGo mega carto. LiteCig sells them, and also many other vendors, with whatever they happen to be calling their eGo-copy fatt-batt PV (Tornado, Riva, etc). I personally found them to be good, last a long time, but a pain to fill. You can with time and patience fill them by dripping onto the batt-
thread hole, but you have to let it sit for a while between sets of several drops. They should hold about 40 drops, I think. Like with all cartos, thinner juices wick better.