Apple MD772LL/A Personal Computer User Manual


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79Chapter 3 Making a Good Thing Better
Replacing the Internal Backup Battery
YourMacProusesaBR2032lithiumcoincellbatterythatpreservessettings,suchas
thedateandtime,whenyourMacProiso.Ifyounoticeintermittentproblemswhen
yourMacProstartsup,orchangesinthedateandtimesettings,replacethebattery.
Important:  Disposeoftheoldbatteryaccordingtoyourlocalenvironmentallaws.
Toreplacethebattery:
1 OpenyourMacProandremovethesidepanel,followingtheinstructionsin“Opening
YourMacPro”onpage39.
2 RemoveanyPCIExpresscardsthatblockaccesstothebattery.See“AddingPCIExpress
Cards”onpage74forinstructions.
3 Removetheoldbatteryfromtheholder.
WARNING:  Installingthebatteryincorrectlymaycauseanexplosion.Useonlythesame
typeofbatteryoranequivalentrecommendedbythemanufactureroftheoriginal.
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