1. Turn your Sony VPCF12BFX/H laptop over.
2. Find the laptop battery release button lock for your Sony VPCF12BFX/H laptop.
3. Now that your Sony VPCF12BFX/H 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 VPCF12BFX/H battery is removed, grab your replacement Sony VPCF12BFX/H battery for installation.
6. Insert the battery into the slot. Push the Sony VPCF12BFX/H battery towards the laptop and secure it in place.