Originally Posted by
gigaplex
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.
I'll go ahead and post the video of an HV pack and a non-HV pack discharging at the same rate for the same amount of time, both starting at 8.4v and you will be able to see that as the packs discharge the HV pack holds higher voltage under load and at rest after discharging.
Even the SMC packs from the link you provided earlier show 7.6v even though they don't label them as HV.