Bumblebee did show some improvement but even if I use bumblebee-disablecard the powertop program still reports 18.7Wh drain of battery. In windows it is about 1

Bumblebee did show some improvement but even if I use bumblebee-disablecard the powertop program still reports 18.7Wh drain of battery. In windows it is about 12-13. Difference of about an hour. Will try ironhide.