I've been the so many small large box and pens vv ve and I used aspire Triton v1 exelent tank but v2 which the glAss is repls iblr but u have to buy a new top for 20 buck t I got a regular sub ohm aspire battery it works so good with the elleaf ijust2 that thing is better than the triton or Atlantis mega the coils last up to 2 weeks if u were a chain smoker like I used to be and with chronic regional pain syndrome and nicotine activates pain receptors u will smoke moe for day or so I tapers as follows I did 24 for a wee the 12 for 2 th3n 6 now I get mine made 80/2(