1. Turn your Toshiba L655D-S5159BN laptop over.
2. Find the laptop battery release button lock for your Toshiba L655D-S5159BN laptop.
3. Now that your Toshiba L655D-S5159BN 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 L655D-S5159BN battery is removed, grab your replacement Toshiba L655D-S5159BN battery for installation.
6. Insert the battery into the slot. Push the Toshiba L655D-S5159BN battery towards the laptop and secure it in place.