You can consult your apps’ energy usage by clicking the battery icon in the menu bar on a MacBook. In Activity Monitor, you can see which apps are using the most processing power. Click the Energy
tab and then sort the Energy Impact column to see which apps are using the
most power over time. Also consider installing Coconut Battery (free, coconutflavour.com), which provides information about how many charge cycles your
battery has been through, and its remaining capacity and health status.