1. Turn your Sony VGNCR290EAW laptop over.
2. Find the laptop battery release button lock for your Sony VGNCR290EAW laptop.
3. Now that your Sony VGNCR290EAW 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 VGNCR290EAW battery is removed, grab your replacement Sony VGNCR290EAW battery for installation.
6. Insert the battery into the slot. Push the Sony VGNCR290EAW battery towards the laptop and secure it in place.