1. Turn your Sony VGNCR410EL laptop over.
2. Find the laptop battery release button lock for your Sony VGNCR410EL laptop.
3. Now that your Sony VGNCR410EL 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 VGNCR410EL battery is removed, grab your replacement Sony VGNCR410EL battery for installation.
6. Insert the battery into the slot. Push the Sony VGNCR410EL battery towards the laptop and secure it in place.