1. Turn your Sony VGNCR225EL laptop over.
2. Find the laptop battery release button lock for your Sony VGNCR225EL laptop.
3. Now that your Sony VGNCR225EL 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 VGNCR225EL battery is removed, grab your replacement Sony VGNCR225EL battery for installation.
6. Insert the battery into the slot. Push the Sony VGNCR225EL battery towards the laptop and secure it in place.