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