Dell Dimension XPS 50 Reference Manual page 46

2-20 Dell Dimension XPS Txxx and Txxxr Systems Reference and Troubleshooting Guide
battery socket
(BT7C1)
5. Replace the computer cover and support beam, and reconnect your computer
and devices to their electrical outlets.
6. Reboot the computer system, press <Del> when the blue Dell logo screen
appears to enter the system setup program, and restore the correct settings.
Refer to Appendix B, "System Setup Program," for instructions.
battery