Compaq Evo D500 Hardware Reference Manual page 33

Hardware Reference Guide
Type 1
a. Lift the battery out of its holder.
Removing a Coin Cell Battery (Type 1)
b. Slide the replacement battery into position, positive side up.
The battery holder automatically secures the battery in the proper
position.
Type 2
a. To release the battery from its holder, squeeze the metal
clamp that extends above one edge of the battery.
b. When the battery pops up, lift it out.
Battery Replacement
B–3