MacBook Pro Battery Drain Issue With Lid Closed - Solved

If you find your MacBook Pro battery drains from 100% full to 30% in about a day, you confirmed Apple has bad software quality assurance.

The solution I found was to type the following at the terminal window (Command + Spacebar, type terminal and press enter):

sudo pmset -b tcpkeepalive 0

This sets a power management setting to turn off a periodic network related item, getting rid of the battery drain.

Shutdown or Restart your laptop.