1. Turn your Dell CPx laptop over.
2. Find the laptop battery release button lock for your Dell CPx laptop.
3. Now that your Dell CPx laptop battery is unlocked, find the battery release button down.
4. Holding the laptop battery release button, gently pull your battery away from the laptop.
5. Now that your Dell CPx battery is removed, grab your replacement Dell CPx battery for installation.
6. Insert the battery into the slot. Push the Dell CPx battery towards the laptop and secure it in place.