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Dell™ OptiPlex™ 760 Service Manual

  Replacing the Battery

Replacing the Battery

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at
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.

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


Invalid configuration information -
please run SETUP program


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 (see Entering 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 (see Entering System Setup) and reset the configuration options.

WARNING: 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.

To remove the battery:

  1. If you have not already done so, make a copy of your configuration information, found in system setup.

  2. Follow the procedures in Working on Your Computer.

  3. Remove the computer cover.

  4. Locate the battery socket.

CAUTION: 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.
CAUTION: To avoid damage to the battery connector, you must firmly support the connector while removing the battery.
  1. Remove the system battery.

    1. Support the battery connector by pressing down firmly on the positive side of the connector.

    1. While supporting the battery connector, press the battery tab away from the positive side of the connector and pry the battery it up out of the securing tabs at the negative side of the connector.


system battery


positive side of battery connector


battery socket tab


battery socket

  1. Install the new system battery.

    1. Support the battery connector by pressing down firmly on the positive side of the connector.

    1. Hold the battery with the "+" facing up, and slide it under the securing tabs at the positive side of the connector.

    2. Press the battery straight down into the connector until it snaps into place.

  2. Replace the computer cover (see Replacing the Computer Cover).

  3. Enter system setup (see Entering System Setup) and restore the settings you recorded in step 1.

  4. Properly dispose of the old battery as described in the safety instructions that ship with your computer.

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