Most Laptop graphic solutions are soldered on the MB. Very unlikely you can upgrade your existing laptop with new video.
Some good news "I'd like to change the battery so that it read the right time. " you can simply reset the battery gauge. Typically laptops need this if they are not fully charged then fully discharged every month or two. http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=3784558&prodTypeId=321957&objectID=c00817650
Your laptop may also come with a program to do this, my lenovo does.
Google on you tube to see disassembly video but it will not help you to replace video.