1. Turn your IBM T33 laptop over.
2. Find the laptop battery release button lock for your IBM T33 laptop.
3. Now that your IBM T33 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 IBM T33 battery is removed, grab your replacement IBM T33 battery for installation.
6. Insert the battery into the slot. Push the IBM T33 battery towards the laptop and secure it in place.