1. Turn your Toshiba C650D-ST2N02 laptop over.
2. Find the laptop battery release button lock for your Toshiba C650D-ST2N02 laptop.
3. Now that your Toshiba C650D-ST2N02 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 C650D-ST2N02 battery is removed, grab your replacement Toshiba C650D-ST2N02 battery for installation.
6. Insert the battery into the slot. Push the Toshiba C650D-ST2N02 battery towards the laptop and secure it in place.