1. Turn your Sony VGNCR410EP laptop over.
2. Find the laptop battery release button lock for your Sony VGNCR410EP laptop.
3. Now that your Sony VGNCR410EP 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 VGNCR410EP battery is removed, grab your replacement Sony VGNCR410EP battery for installation.
6. Insert the battery into the slot. Push the Sony VGNCR410EP battery towards the laptop and secure it in place.