1. Turn your HP dv4-2165dx laptop over.
2. Find the laptop battery release button lock for your HP dv4-2165dx laptop.
3. Now that your HP dv4-2165dx 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 HP dv4-2165dx battery is removed, grab your replacement HP dv4-2165dx battery for installation.
6. Insert the battery into the slot. Push the HP dv4-2165dx battery towards the laptop and secure it in place.