1. Turn your IBM T31 laptop over.
2. Find the laptop battery release button lock for your IBM T31 laptop.
3. Now that your IBM T31 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 T31 battery is removed, grab your replacement IBM T31 battery for installation.
6. Insert the battery into the slot. Push the IBM T31 battery towards the laptop and secure it in place.