The Vapor flask DNA 133 by Vapor shark is a super ergonomic dual battery mod. It is powered by the dna 133 and supports two 18650 batteries instead of a non-replaceable lithium polymer battery. Just like a dna 200 device, the microprocessor can be programmed on Escribe for advanced temperature control and user controlled personalization. The frame of the Vaporflask is made of high strength aluminum and is anodized, then coated in a durable rubberized finish for a stealthy appearance and high grip. The battery door is positioned on the outside of the device allowing for easy removal of your cells, although they can be charged very rapidly with its Zip Charge USB port