The RX200, a new version of Reuleaux series, designed by JayBo, still features the use of three removable 18650 batteries and reverse polarity protection. However, the new and powerful chip has a maximum output of 200 watts and advanced temperature control functions including Titanium, Nickel and Stainless Steel modes. 
The Reuleaux RX200 box mod utilizes a micro-USB port to charge them as well. In addition to sporting three 18650 batteries, the Reuleaux is also incredibly ergonomic; it fits really well in the hand.