Apple’s MacBook, MacBook Air, and MacBook Pro laptops don’t have a battery slider, although many of the same settings described above are present in the Energy Saver preferences.
To open it, click on the Spotlight magnifying-glass icon in the upper right corner of the screen, search for Energy Saver, and then click on the Battery tab. If you want to approximate the Windows Better Battery or Battery Saver modes, make sure that the options “Put hard disks to sleep when possible” and “Slightly dim the display while on battery power” are checked, and the option “Enable Power Nap while on battery power” is unchecked. (With Power Nap enabled and your MacBook asleep, the machine will wake up now and then to check for updates. Disabling it keeps your MacBook fully asleep when it is asleep—until you choose wake it up.) On recent MacBook Pro laptops, the display brightness adjusts to 75 percent when you unplug the computer from power if you have “Slightly dim the display while on battery power” enabled.
So, if you want the best battery life, should you use Battery Saver all the time? Not exactly. Because Battery Saver mode disables some useful features, you might want to use it only when your battery is below 20 percent and a power outlet isn’t near. Likewise, turning off Power Nap can mean it will take longer to catch up on notifications you’ve missed while you’re away from your MacBook. That’s why most users should use the Better Battery setting and enable Power Nap most of the time.