WOW! Power user! I have 2 PERSEI's that are just amazing! One is setup with a 2.4 cart and GIRL SCOUT COOKIES WAX (Chrome) AW IMR 18650 Battery The other one with a 5.0 cart and PRESIDENTS WAX (Black) 2 x AW IMR 18350 Batteries I'm having really good use out of the PERSEI. The OMNI I want to get due to the cool travel size.