1. Turn your Toshiba PSAFGU-03J002B laptop over.
2. Find the laptop battery release button lock for your Toshiba PSAFGU-03J002B laptop.
3. Now that your Toshiba PSAFGU-03J002B 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 PSAFGU-03J002B battery is removed, grab your replacement Toshiba PSAFGU-03J002B battery for installation.
6. Insert the battery into the slot. Push the Toshiba PSAFGU-03J002B battery towards the laptop and secure it in place.