1. Turn your Toshiba ProL100 laptop over.
2. Find the laptop battery release button lock for your Toshiba ProL100 laptop.
3. Now that your Toshiba ProL100 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 Toshiba ProL100 battery is removed, grab your replacement Toshiba ProL100 battery for installation.
6. Insert the battery into the slot. Push the Toshiba ProL100 battery towards the laptop and secure it in place.