Many apps want to use your location for convenience (and other reasons), but if you don’t use or care about those location driven features, disabling the ones you don’t need can help to prolong battery life.
From System Preferences, go to “Security & Privacy” and choose the “Privacy” tab
From the left side, select “Location Services”
Disable location abilities for apps you don’t need the function for (alternatively, you can disable them all by unchecking the primary “Enable Location Services” checkbox)
Click on “Details” next to ‘System Services’ and review location options there as well
The effect here is not as strong as it would be for disabling Location Services in iOS on an iPhone, but it does still make a difference.
Lower the Screen Brightness
The UI of OS X Yosemite is really quite bright as-is, and lowering screen brightness on any device, Mac, PC, Android, iPhone, is one of the single most significant things you can do to boost the length of battery life. OS X Yosemite is no different in this regard, so if you can handle a dimmer screen, turn it down using your keyboard (usually the F1 and F2 buttons).If you want to go further, you can read more battery tips for Mac laptops for some more general solutions. Also, keep in mind that many Mac laptop users have reported an increase in battery life with OS X Yosemite, which is perhaps suggestive that any change in battery longevity is related to individual use and system preferences.
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