1. Turn your Sony VPCF113FX laptop over.
2. Find the laptop battery release button lock for your Sony VPCF113FX laptop.
3. Now that your Sony VPCF113FX 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 VPCF113FX battery is removed, grab your replacement Sony VPCF113FX battery for installation.
6. Insert the battery into the slot. Push the Sony VPCF113FX battery towards the laptop and secure it in place.