With owning the original OBS Cube MTL Kit which had a built-in battery, in Matt black. An OBS Cube-X with a removable 18650, in Chrome. This is the best Cube yet, it has a nice updated colour screen. A solid removable battery door like my Triade DNA250C, not sure the name for this type of battery door. But there isn't any hinge that could become loose or brake over time, not that that has ever happened to me with any of my mods. it's nice and comfortable in the hand & super simple to use being only a wattage mod. I love the Cube mods, nice compact mods for my MTL/RTA's. Thank Vaping101, brilliant prices & brilliant service.