1. Turn your Lenovo 4446-23U laptop over.
2. Find the laptop battery release button lock for your Lenovo 4446-23U laptop.
3. Now that your Lenovo 4446-23U 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 Lenovo 4446-23U battery is removed, grab your replacement Lenovo 4446-23U battery for installation.
6. Insert the battery into the slot. Push the Lenovo 4446-23U battery towards the laptop and secure it in place.