1. Turn your Sony PCG-GRT25F laptop over.
2. Find the laptop battery release button lock for your Sony PCG-GRT25F laptop.
3. Now that your Sony PCG-GRT25F 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-GRT25F battery is removed, grab your replacement Sony PCG-GRT25F battery for installation.
6. Insert the battery into the slot. Push the Sony PCG-GRT25F battery towards the laptop and secure it in place.