It's a replaceable battery. Not certain as far as attachments with that framing -- it seems made for the iclear 30. Also, wondering about that knob on the top. It doesn't look like a firing button, but more like an adjustment switch...
I'd rather a replaceable battery. The wheel is probably a voltage/wattage adjustment I'd say - turn to change setting.
I like the look of this new iTaste v 3 vw too - great size for out and about.