1. Turn your Dell CPT laptop over.
2. Find the laptop battery release button lock for your Dell CPT laptop.
3. Now that your Dell CPT 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 CPT battery is removed, grab your replacement Dell CPT battery for installation.
6. Insert the battery into the slot. Push the Dell CPT battery towards the laptop and secure it in place.