computer cmos battery

How To Change the Battery in a Computer eHow.com 
A computer has a battery or special chip that retains computer (CMOS) settings and runs the computer clock even after the computer itself is turned off. 
  
PRAM Cache CMOS Batterys for Macintosh - Buy it 
New 4.5v Mac PRAM/Clock Backup Battery. The Rayovac 841 is a 4.5 Volt, 650 mAh alkaline computer clock PRAM battery with 3 inch wire lead. 
  
LiveRepair.com Encyclopedia Hardware Tips CMOS Replace 
How To Replace The CMOS Battery In Your PC. Most PC users dont think much about the CMOS battery until their computer shows signs of losing its BIOS. 
  
Replacing the CMOS Battery 
Replacing Your Motherboard CMOS Battery. Computers contains a battery to keep time when the computer is off, much like a watch or some alarm clocks. 
  
CMOS Backup Battery » PCMech 
After you remove the old battery, your computer will forget everything. Let’s go through the battery replacement procedure:. Turn off the computer. 
  
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