worthwhile clip to watch about accurately measuring a battery's amp hour capacity. Agilent equipment is designed specifically for phone size batteries and are limited to 100 watt range... cost big $$$.
this is why Cellpro Powerlab 8 from Progressive RC was chosen to test/charge LiFePO4 motorcycle batteries. providing power supply is large enough, up to 40 amp charge rates. 1350 watts regenerative discharge rates are possible. PC controlled software to track results is free. very modest cost $$ considering capabilities.