SOLVED: Is there no CMOS RAM battery on this model? - MacBook Unibody Model A1278 - iFixit
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BIOS EFI firmware chip: Apple iMac A2115 27" Retina 5K, 2019, EMC 3194 | eBay
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A1322 Original Battery for A1278 Apple MacBook Pro 13 inch 2009 2012, A1322 Battery for Apple MacBook Pro 13 inch A1278 (Mid 2009 – Mid 2012) - WIT Computers
NewerTech® : Batteries : 3.6V Lithium 1/2 AA PRAM Battery for Mac®
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Mac Pro CMOS battery - Apple Community
If I remove the dead PRAM battery from my iMac G3, how does it help the computer to boot? - Quora
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