Click the battery indicator in your menu bar and see which apps are listed as "using significant energy"? Go one level deeper and open "Activity Monitor" and l

Click the battery indicator in your menu bar and see which apps are listed as "using significant energy"? Go one level deeper and open "Activity Monitor" and look at the energy impact for the apps you are using. Unless you use Safari, which is wonderfully energy-effecient, then the most likely culprit is your web browser, especially if you're using Google Chrome. Personally, I'd use Safari over Chrome for the energy efficiency alone, but I understand people have different priorities. You can also check the health of your battery by doing "Apple Menu" -> "About This Mac" -> "System Report…" and then selecting "Power" in the side bar. (Google for the expected charge capacity for your laptop model.)