Dell OptiPlex SX270 - Manual (Page 37)

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Battery
Dell™ OptiPlex™ SX270 Systems User's Guide
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.
1. If you have not already done so, make a copy of your configuration information, found in system setup (see " System Setup ").
2. Remove the cable cover (if used).
3. Remove the stand (if used).
4. Remove the computer cover.
5. Locate the battery socket labeled BATTERY (see " System Board Components ").
6. To remove the battery, grip the battery and slightly twist it as you lift it out of the connector.
7. Insert the new battery into the socket with the side labeled with the symbol (+) not facing the opening, and snap the battery down into place.
8. Replace the computer cover.
9. Reattach the stand (if used).
CAUTION: Before you begin this procedure, follow the steps in " CAUTION: Safety Instructions ."
CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of
your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.
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 location of the battery
connector