1. Turn your Sony VGNCR190N laptop over.
2. Find the laptop battery release button lock for your Sony VGNCR190N laptop.
3. Now that your Sony VGNCR190N 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 VGNCR190N battery is removed, grab your replacement Sony VGNCR190N battery for installation.
6. Insert the battery into the slot. Push the Sony VGNCR190N battery towards the laptop and secure it in place.