I have an 8 year old Asus 73S computer and its battery is like this: Model: A32-K72 10.8V 5200mAh 56Wh I saw a battery on internet, as follows Model: Same as above. 10.8V 4400mAh 48Wh Although same model it has lower mAh and Wh as you see. What difference does it make, when mAh and Wh is different? It will not harm my computer right? And of course this is not from original manufacturer and they only give 6 months warranty, and after that what is your opinion? Big difference in price between original and not original.