In many cases, this is the result of a connection issue. We recommend that you first try cleaning the gold connection pins between the battery and atomizer to alleviate any connection issues that may be occurring between the two. This can be done with the wipe of a cotton swab dipped in ISO. Sometimes even the smallest bit of debris can cause a bad connection which stops the pen from working at it's full potential.
If this happens with a brand new atomizer, please contact our support team for further assistance.