I have an XPS 13 2in1 model 9365. Since Windows installed the October 1809 update my battery life has been cut in half. I'm lucky to get 4 hours use now. I have checked out all of the power settings and they are correct. Ran troubleshooter and no problems were found. Can anyone point me to a fix? Will reinstall in the 1809 update solve the issue. Microsoft is no help.