At 1300mAh, and 3ml cartamizers, the go go was a win buy for me. I just loaded up five of the cartos with V4L juice (of course) and my flavor and vapor production went through the roof. At 65 for 2 batteries and 21 cartamizers used, I am a very happy camper. Btw I highly recommend (as of this morning) that if anyone enjoys Wowboy, that they try the Wowboy peppermint if they haven't. The little hint of peppermint at the end is such a delight.