A:AnswerI just ordered this computer yesterday and it came in today as a refurbished/re-certified computer. I was surprised when the package got delivered today with just ordering it yesterday but now it makes sense. So you might want to check you listing Best Buy.
A:AnswerGood question. The battery life will be unto 4.5 hours depending on usage. You should be able to switch out the hard drive on this laptop.
Here is an article with instructions on changing the hard drive on a similar HP laptop model: http://support.hp.com/us-en/document/c04337198
I hope this helps.
A:AnswerGreat question. You will be able to replace the current HDD, but you won't be able to add another hard drive to it.
For more specifications on the laptop, please visit the following link: http://media.flixcar.com/f360cdn/HP-971611724-c04802097.pdf
I hope this helps!