Apple MC372LL/A Laptop User Manual


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30 Chapter 2 Life with Your MacBook Pro
Using the MacBook Pro Battery
WhentheMagSafepoweradapterisn’tconnected,yourMacBookProdrawspower
fromitsbuilt-inbattery.ThelengthoftimethatyoucanrunyourMacBookProvaries,
dependingontheapplicationsyouuseandtheexternaldevicesconnectedtoyour
MacBookPro.
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.
Youcandeterminethechargeremaininginthebatterybylookingattheeightbattery
levelindicatorlightsontheleftsideofyourMacBookPro.Pressthebuttonnexttothe
lights,andthelightsglowbrieytoshowhowmuchchargeremainsinthebattery.
Important:  Ifonlyoneindicatorlightison,verylittlechargeisleft.Ifnolights
illuminate,thebatteryiscompletelydrainedandtheMacBookProwon’tstartupunless
thepoweradapterisconnected.Pluginthepoweradaptertoletthebatteryrecharge.
Formoreinformationaboutbatteryindicatorlights,seepage54.
Youcanalsochecktheamountofbatterychargeremaining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are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.
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