1. Turn your Sony PCG-V505BL laptop over.
2. Find the laptop battery release button lock for your Sony PCG-V505BL laptop.
3. Now that your Sony PCG-V505BL 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 Sony PCG-V505BL battery is removed, grab your replacement Sony PCG-V505BL battery for installation.
6. Insert the battery into the slot. Push the Sony PCG-V505BL battery towards the laptop and secure it in place.