1. Turn your HP dv5155eu laptop over.
2. Find the laptop battery release button lock for your HP dv5155eu laptop.
3. Now that your HP dv5155eu 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 dv5155eu battery is removed, grab your replacement HP dv5155eu battery for installation.
6. Insert the battery into the slot. Push the HP dv5155eu battery towards the laptop and secure it in place.