I got this right from
innokin's online manual:
"When the
device has been fully charged the Green LED will cease to light up and the
device may now be disconnected and used as per normal"
It also says (if you don't use it as a passthrough-using while charging), it takes approx. 3.5 to 5.5 hours to charge.
Hope this helps! I am getting my itaste MVP today!
