Just showing how to replace your laptops battery cells. Just gently take out the cover, if you can retail the locks, then please do. Either way you are not gonna need it after opening a factory locked item, most likely it will break. So, get the batteries out, replace with whatever amperage you want, but I would suggest not to go over than a 4000MA or milli-ampere. It will take severe amount of time to recharge, but will give you longer backup times. But do remember that you have to solder each cell the way they were exactly laid out.
YouTube link for the video: https://www.youtube.com/watch?v=U_b1nsCC6p4