1. Turn your Toshiba L655-S5166WHX laptop over.
2. Find the laptop battery release button lock for your Toshiba L655-S5166WHX laptop.
3. Now that your Toshiba L655-S5166WHX 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 L655-S5166WHX battery is removed, grab your replacement Toshiba L655-S5166WHX battery for installation.
6. Insert the battery into the slot. Push the Toshiba L655-S5166WHX battery towards the laptop and secure it in place.