1. Turn your EI 4412 laptop over.
2. Find the laptop battery release button lock for your EI 4412 laptop.
3. Now that your EI 4412 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 EI 4412 battery is removed, grab your replacement EI 4412 battery for installation.
6. Insert the battery into the slot. Push the EI 4412 battery towards the laptop and secure it in place.