I have an 8 showing in the first digit of the display that flickers. I can't see that anywhere in the owners manual as an error code. I swapped the batteries (AW IMR 18490s) and the atty. It is still there. I can't find a warranty link on ProVape so I emailed the general contact. Just my luck. I was enjoying vaping it. Unless I am missing something in the manual about this issue?