1. Turn your Toshiba PSAE3C-18V08C laptop over.
2. Find the laptop battery release button lock for your Toshiba PSAE3C-18V08C laptop.
3. Now that your Toshiba PSAE3C-18V08C 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 PSAE3C-18V08C battery is removed, grab your replacement Toshiba PSAE3C-18V08C battery for installation.
6. Insert the battery into the slot. Push the Toshiba PSAE3C-18V08C battery towards the laptop and secure it in place.