1. Turn your Toshiba A300D-14D laptop over.
2. Find the laptop battery release button lock for your Toshiba A300D-14D laptop.
3. Now that your Toshiba A300D-14D 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 A300D-14D battery is removed, grab your replacement Toshiba A300D-14D battery for installation.
6. Insert the battery into the slot. Push the Toshiba A300D-14D battery towards the laptop and secure it in place.