1. Turn your Toshiba A300-1IJ laptop over.
2. Find the laptop battery release button lock for your Toshiba A300-1IJ laptop.
3. Now that your Toshiba A300-1IJ 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 A300-1IJ battery is removed, grab your replacement Toshiba A300-1IJ battery for installation.
6. Insert the battery into the slot. Push the Toshiba A300-1IJ battery towards the laptop and secure it in place.