1. Turn your IBM T61 laptop over.
2. Find the laptop battery release button lock for your IBM T61 laptop.
3. Now that your IBM T61 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 T61 battery is removed, grab your replacement IBM T61 battery for installation.
6. Insert the battery into the slot. Push the IBM T61 battery towards the laptop and secure it in place.