Recommendation’s please

I drew this little doodle of a robot head recharging. It was quick and was never meant to be anything special, but I’d like the concept of it. I don’t really like the way the hair turned out. And I feel like there’s more to be done to make it look more robotic but still keep it’s human like look. If you have any recommendations to help me with this, I would be most grateful. My run request is that you please be polite about your constructive criticism and recommendations. I plan on making a second attempt on this.