Specifications

30 Chapter 2 Life with Your MacBook
Using the MacBook Battery
WhentheMagSafepoweradapterisn’tconnected,yourMacBookdrawspowerfromits
built-inbattery.ThelengthoftimethatyoucanrunyourMacBookvaries,depending
ontheapplicationsyouuseandtheexternaldevicesconnectedtoyourMacBook.
TurningofeaturessuchasAirPortExtremeorBluetooth®wirelesstechnologyand
reducingscreenbrightnesscanhelpconservebatterycharge—forexample,when
you’retravelingbyair.Manyofyoursystempreferencesareautomaticallysetto
optimizebatterylife.
Ifthebatteryrunslowwhileyou’reworking,connectyourpoweradapterandlet
thebatteryrecharge.Youcanchecktheamountofbatterychargeleftbyviewing
theBattery(
)statusiconinthemenubar.Thebatterychargeleveldisplayedis
basedontheamountofpowerleftinthebatterywiththeapplications,peripheral
devices,andsystemsettingsyou’recurrentlyusing.Toconservebatterypower,close
applicationsanddisconnectperipheraldevicesnotinuse,andadjustyourEnergy
Saversettings.
Formoreinformationaboutbatteryconservationandperformancetips,goto
www.apple.com/batteries/notebooks.html.
Charging the Battery
WhenthepoweradapterthatcamewithyourMacBookisconnected,thebattery
rechargeswhetherthecomputerison,o,orinsleep.Thebatteryrechargesmore
quickly,however,whenthecomputerisoorinsleep.
ThebatteryinyourMacBookcanbereplacedonlybyanAppleAuthorizedService
ProvideroranAppleRetailStore.