Two to three days after I received my 15 inch base model MBP, the battery life was amazing. I ended the workday off with over 45% remaining after over 300 minutes of constant usage. Recently however, my battery life has become significantly worse, and the power consumption has become relatively high. Activity Monitor is not reporting any abnormal activity, and my device is using the integrated graphics, so I am unsure why I am getting roughly 5 to 6 hours of actual usage now. I was hoping someone could give me some tips on how to reverse this issue. I haven't downloaded any software and my usage is the same as before.