94 Chapter 5 What’s Under the Hood
System Clock and Battery
Your computer has CMOS custom circuitry with a long-life battery.
Battery
Use a 3-volt, CR 2032 Lithium coin cell replacement battery (see “Replacing the Internal
Backup Battery” on page 64).
Dimensions and Operating Environment
Dimensions
 Weight: 42.4 lbs. (19.2 kg)
Weight depends on configuration. The weight above is for a basic configuration and
may be greater if optional devices are installed.
 Height: 20.12 inches (511 mm)
 Width: 8.11 inches (206 mm)
 Depth: 18.70 inches (475 mm)
Operating environment
 Operating temperature: 50° to 95° F (10° to 35° C)
 Storage temperature: –40° to 116° F (–40° to 47° C)
 Relative humidity: 5% to 95% (noncondensing)
 Altitude: 0 to 10,000 feet (0 to 3048 meters)
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