There are a few different settings that affect how much battery life you get from your battery. The first thing you should do is adjust the settings in Energy Saver.
Single click the battery gauge at the top right of your screen.
From the popup menu you can select an Apple default energy setting. The three options are: Better Energy Savings, Normal, and Better Performance.
If you have the laptop plugged in you would usually select Better Performance. To get the longest battery life select Better Energy Savings.
To custom configure your Energy Settings select Open Energy Saver… from the popup menu
Select Custom from the “Optimization:” dropdown menu.
You will see two sliders across the window. The first slider allows you to set how long it takes before the computer is put to sleep. For example if you set the slider to 15min then after 15min of inactivity the computer will be automatically put to sleep.
Note***: The more to the left you drag these sliders the more battery life you will likely get.
Click the Options tab to view more options.
Here you can check to enable any of three options.
– Slightly dim the display when using this power source
– Automatically reduce the brightness of the display before display sleep
– Show battery status in the menu bar
The first two options will of course increase your battery life.
To schedule a start up or wake up time for your computer, select the “Start up or wake” checkbox. Choose a day or group of days from the pop-up menu, and then specify a time.
To schedule a shut down time for your computer, select the bottom checkbox and choose Shut Down from the pop-up menu. Choose a day or group of days from the pop-up menu, and then specify a time.
To schedule a sleep time for your computer, select the bottom checkbox and choose Sleep from the pop-up menu. Choose a day or group of days from the pop-up menu, and then specify a time.
There are a few other things you can do to conserve battery power such as:
– Manually dim the screen using the F1 key on the keyboard.
– Shut down the airport wireless networking feature.
– Shut down the bluetooth feature.