Great for all day vaping. The TITAN 650mAh battery can be used with our Vapage cartomizers, that is if you really want to have a quick flavor change, but we recommend the TITAN clear crystal atomizers or steel cartomizers. The TITAN will work with a variety of cartomizers and tanks. Including Vapage or Cig2o refill cartomizers, the TITAN stainless steel cartomizers or the TITAN crystal. We also have an adapter that works for the Crystal XL! Specifications: Stainless steel construction, with a 3.7v, 650mAh.