1. Turn your HP DV7-3112sa laptop over.
2. Find the laptop battery release button lock for your HP DV7-3112sa laptop.
3. Now that your HP DV7-3112sa 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 DV7-3112sa battery is removed, grab your replacement HP DV7-3112sa battery for installation.
6. Insert the battery into the slot. Push the HP DV7-3112sa battery towards the laptop and secure it in place.