To Extend MacBook Battery Life, Turn Off features, Disconnect Peripherals, and Shut Down Applications
Turning off features you are not using, shutting down applications you are not using, and disconnecting the external peripherals you’re not using can help maximize the battery life. Here are some suggestions.
You can turn off the AirPort card when not using the Internet. To turn off AirPort, go to the Apple menu and select System Preferences, then open the View menu and select Network. From the Show selection, select Network Port Configuration. Unselect AirPort from the list and then click the Apply Now button.
The Bluetooth device uses a lot energy. You can turn it off when you’re not using it. If you wish to turn off Bluetooth, open the Apple menu and select System Preferences. Open the View menu and select Bluetooth. Click on the Settings tab and then Turn Bluetooth off.
If you’re in a location where you do not need to use Bluetooth or AirPort, turn them off to save battery power.
The optical drives spins up every so often to read the disc, so this consumes a little power. If you are not using a CD or DVD, eject it from the drive.
Connected peripherals use energy from the battery even when you are not using them. You may have a digital camera, scanner, or printer connected to your MacBook, so disconnect them when you are not using them.
Running applications even when you are not using them uses system resources, which in turn consume Macbook Pro battery. So, shutdown all those applications that you are not using.