Originally Posted by
waitwhat
But there is no set thing that says the capacities have to line up, which is what you are doing when you shift the line left. You have to disregard the capacity of the HV pack above 8.4v because you are not charging above 8.4v. What really matters is voltage over time. Starting at the same voltage (8.4v) the HV cells stay at a higher voltage over the same amount of discharge time as the non-HV because the non-HV packs are 7.4v nominal.
Don't believe me, look at it from the other way. If you run both packs down to lvc set at 7.0v and then put 50% of the mah back into the packs the HV pack will still be at 7.6v and the non-HV pack will still be at 7.4v
My charger can easily prove me right. If you'd like me to make a video where I start both packs at 8.4v and discharge them at the same rate and time I will. The voltage for the HV cells will remain above the non-HV cells for the entire length of the discharge. Would that be enough for you to admit you are wrong and I am right?
You start the race at 8.4V. Your capacity usage since you charged it to 8.4V starts at 0. Since we're interested in voltage over time, the time starts when you start discharging. 15 seconds into your race, you may have discharged ~125mAh. If you don't move the red line to the left to compensate for when you start, the graph tells you your voltage will be higher than 8.4V. That's just plain wrong. If you're not going to understand something as fundamental as that I've got no more interest in continuing this discussion.
The only reason a LiHV pack is labelled with a 7.6 nominal voltage vs a current gen LiPo is because the average between 8.7V and a flat battery (roughly 6.2V) is higher than 8.4V and a flat battery. It's not because the curve itself is different. If you only ever charge to 8.4V on a LiHV pack you're effectively lowering your capacity and nominal voltage.