1. Turn your Sony PCG-F610K laptop over.
2. Find the laptop battery release button lock for your Sony PCG-F610K laptop.
3. Now that your Sony PCG-F610K 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-F610K battery is removed, grab your replacement Sony PCG-F610K battery for installation.
6. Insert the battery into the slot. Push the Sony PCG-F610K battery towards the laptop and secure it in place.