I am currently in the process of building my first LIION battery. It is a 10s3p My 18650s just arrived today! As I went through them with my voltmeter, each cell was reading 3.5 volts. Yet, unfortunately my voltmeter doesnt read any more specific than that. How close should my LIION cells be when first building my pack? Theoretically, is it ok if one cell in my 3p is 3.5 volts and the other is 3.57 volts?