Let me also point out an easy way to know your cell capacity is to bottom balance your pack. Once you have them all discharged to the same SOC you monitor them when charging. When the voltage starts to shoot up on the first one, (around 3.50 for SE/CALB), you know it's reaching full and you know it's your smallest capacity cell. Using an amp hour meter you know how many amp hours went into it. Also, my SE/CALB cells all came with a data sheet listing actual capacity and resistance for each cell, tested at the factory. I guess HiPower doesn't do the same? You can also use a $30 Cell Log 8 to log 8 cells at a time to see how they behave under load.