Mac Classic Pram Battery, 6V Lithium 1/2 AA PRAM Battery for Mac give you high-performance, quality, and longevity to your battery upgrade. There are 2 Torx T-8 screws securing it to the chassis - remove them, and the mod le will come out of the chassis. Remove the old battery. The PRAM battery is used to store settings like date and time, time zone, display settings (resolution and color depth), boot disk, speaker volume, 24/32bit memory addressing selection, and more. I've acquired one for my own computer collection but the PRAM battery is dead. No shipping fees on orders on $35. Hi there, over the years, I've seen several cases of 68k Macs with leaking PRAM batteries. The PRAM battery is used to store settings How long will the PRAM battery last I'm having an upgrade done to my i7 mid 2010 iMac 11,3. You should replace it ASAP. it depends on if you are constantly using your Mac or letting it sit unplugged or in storage for long periods.

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