Compaq Presario 3000 Series Operation And Reference Manual page 64

5-8 Compaq 3000 Series Operation and Reference Guide
5. Disconnect the negative (black) battery pack terminal connections.
WARNING: To reduce the risk of short-circuits or arcing, disconnect the
negative (black) battery lead before disconnecting the positive (red) battery lead.
Figure 5-6. Disconnecting the battery pack terminal connections
6. Disconnect the positive (red) battery pack terminal connections.
7. Slide the battery pack out approximately 6 inches, to access the battery
cable retainer bracket. Remove the screw and battery cable retainer
bracket.
Figure 5-7. Removing the screw and battery cable retainer bracket