Removing the Discharged Battery

1. Power off the controller.
2. Remove the power cables attached to the controller.
3. Remove the controller cover.
   

   Warning

   Make sure the controller is powered off and unplugged before removing the chassis cover.
4. Discharge the controller from static electricity by touching it with a metallic object and making sure all controller board LEDs are off.
5. Locate the battery as shown in CMOS Battery Location. The positive pole of the battery should be visible.
6. Gently press the spring clip to eject the battery from the socket.
7. Remove the battery.