well my new opus bt-c3100 arrived today and began capacity testing, the manual says cells will go down to 2.8v. 2 hours in and the test has stopped, way above 2.8v, test stopped at 3.2 v, hmm i suppose its a constant. cells are samsung q15 rated 1.5 amp, coming out at 1.6amp so as good but why did it stop short? did the unit detect an internal resistance change,or is the calibration out?