Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel-connector assignments (configuration). A coin-cell battery keeps this information active when you turn off the computer.
The coin-cell battery normally requires no charging or maintenance throughout its life; however, no battery lasts forever. If the coin-cell battery fails, the date and time information is lost.
Refer to the “Lithium coin cell battery notice” in the Safety, Warranty, and Setup Guide for information about replacing and disposing of the battery.
Prepare your computer. See Preparing your computer and removing the computer cover.
Locate the coin-cell battery. See Parts on the system board.
- Remove any parts that might impede your access to the coin-cell battery. Depending on your computer model, you might need to remove the following parts for easier access to the coin-cell battery.
- Remove the old coin-cell battery as shown.Figure 1. Removing the coin-cell battery
- Install a new coin-cell battery as shown.Figure 2. Installing a coin-cell battery
Reinstall the PCIe cards or the super capacitor module if you have removed them. See PCIe card, Full-length PCIe card, or Super capacitor module.
- Reinstall the computer cover and connect the cables. See Completing the parts replacement.Note: When the computer is turned on for the first time after the coin-cell battery is replaced, an error message might be displayed. This is normal after the coin-cell battery is replaced.
Turn on the computer and all attached devices.
Use the Setup Utility program to set the date and time. See Using the Setup Utility program.