HP Pavilion Elite d5100 - ATX Desktop PC Manual page 35

Procedure
1 Prepare the computer, and remove the computer cover. Complete the procedure
"Opening the Computer" on page 4.
2 Gently lay the computer on its side on a soft, protective surface.
3 If an add-in or graphics card is in the way of the battery, remove the graphics card
first. See "Removing a Graphics Card" on page 25.
4 Remove any cabling, if necessary, to reach the battery.
5 Move the retaining tab (1) away from the battery. Lift the battery from the socket.
6 Install the new CR2032 battery in the socket, with the positive (+) side facing up.
Upgrading and Servicing Guide
31