1. Turn your HP DV4011AP laptop over.
2. Find the laptop battery release button lock for your HP DV4011AP laptop.
3. Now that your HP DV4011AP 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 DV4011AP battery is removed, grab your replacement HP DV4011AP battery for installation.
6. Insert the battery into the slot. Push the HP DV4011AP battery towards the laptop and secure it in place.