Dell OptiPlex GX260 Series System User's Manual page 41

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Battery
Dell™ OptiPlex™ GX260 Systems User's Guide
CAUTION: Before you begin this procedure, follow the steps in
A coin-cell battery maintains computer configuration, date, and time information. The battery can last several years.
The battery may need replacing if an incorrect time or date is displayed during the boot routine along with a message such as:
Time-of-day not set - please run SETUP program
or
Invalid configuration information -
please run SETUP program
or
Strike the F1 key to continue,
F2 to run the setup utility
To determine whether you need to replace the battery, reenter the time and date in system setup and exit the program to
save the information. Turn off your computer and disconnect it from the electrical outlet for a few hours, then reconnect the
computer, turn it on, and enter system setup. If the date and time are not correct in system setup, replace the battery.
You can operate your computer without a battery; however, without a battery, the configuration information is erased if the
computer is turned off or unplugged from the electrical outlet. In this case, you must enter system setup and reset the
configuration options.
CAUTION: A new battery can explode if it is incorrectly installed. Replace the battery only with the same
or equivalent type recommended by the manufacturer. Discard used batteries according to the
manufacturer's instructions.
1. If you have not already done so, make a copy of your configuration information, found in system setup (see
Setup").
2. Open the computer cover.
3. Locate the battery socket labeled BATTERY (see
NOTICE: If you pry the battery out of its socket with a blunt object, be careful not to touch the system board with the
object. Ensure that the object is inserted between the battery and the socket before you attempt to pry out the
battery. Otherwise, you may damage the system board by prying off the socket or by breaking circuit traces on the
system board.
4. Remove the battery by carefully prying it out of its socket with your fingers or with a blunt, nonconducting object such
as a plastic screwdriver.
5. Insert the new battery into the socket with the side labeled "+" facing up, and snap the battery into place.
"CAUTION: Safety
"System Board Components").
Instructions."
"System