what i would worry more about is HEAT PRODUCED
you will need a way to keep your cpus cold, as i bet you if you run your chip @ 90 degrees , in a few months SOMETHING in the laptop will die likely haha
This ^^ is very true. Don't put your laptop and its CPU at risk of dying. Laptops are not projected to be in use all day long at maximum power. They are projected to be used a while and to shut them down at the end of the day. If you absolutely have a laptop you don't care about, you may try mining, if only for educational purposes. You won't earn much anyway.