1. Turn your Sony PCG-951A laptop over.
2. Find the laptop battery release button lock for your Sony PCG-951A laptop.
3. Now that your Sony PCG-951A 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-951A battery is removed, grab your replacement Sony PCG-951A battery for installation.
6. Insert the battery into the slot. Push the Sony PCG-951A battery towards the laptop and secure it in place.