Real world efficiency of LiFePO4

Ampster said:

My question may be a nitpick but does he actually encourage people to cycle to 100% or did he say they are designed so that people can go to 100% if they want to or need to? It is not like NimH where there is a memory effect and there were definite advantages to cycle 100%

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Since you didn't see the earlier part of the thread here's the brief recap:
I was just speculating to appease the fanboys since battery university and Will shared that you can greatly increase the lifetime of LifePO4 by not charging to 100% and not discharging to 0%. Ped was saying that BattleBorn encourages full cycling (as a challenge to the scientific data I was referencing). So to be diplomatic I was trying to reconcile what the data says about LiFePO4 capacity over time and what the BattleBorn fanboys were getting upset about (I never attacked that brand, why would I?)
My background is in a different area of engineering so I'm just learning like everyone else.

One guy bolted from the thread b/c the fan-boying became hostile in tone; inappropriate I would have moderated it if it were my forum but I suspect it's an issue of youth.
I'm still here because I'm also interested in reconciling the science with the "Battleborn phenomenon." The @Ped fellow shared a video and a time code (wrong time code they are discussing temp you have to watch a bit longer) where Will asks about battery life is it true that it's best not to charge to full capacity and the BattleBorn CEO says, "we want people to charge our batteries all the way" (paraphrase).
SO this was presented as evidence that the Video Will made discussing how to extend Lifepo4 battery life (not charging to 100% and not discharging to 0%) was somehow fallacious. So here we are... for some reason the @MBR fella is upset with me and my "speculating."
As a retired engineer I don't understand the passive aggressive shots about a product. It's not like I'm attacking Battleborn; I would never spend so much when I could build 4x the capacity for myself but I know not everyone is hands on into tinkering. I've accepted the claims at face value; I trust Will more though than I do fanboys though so I'll continue to approach my own upcoming LifePo4 system with a strategy to use 70% capacity to extend the life.

He cannot seem to grasp that the extra internal capacity is so the end user actually gets the full 100Ah without actually taking the internal battery below 10%, and not to magically hide the top end and force a faux top balance.

Its like a reserve on a fuel tank. Theres actually still fuel when the gas runs out. But you're still filling the tank to the top.

Ped said:

He cannot seem to grasp that the extra internal capacity is so the end user actually gets the full 100Ah without actually taking the internal battery below 10%, and not to magically hide the top end and force a faux top balance.

Its like a reserve on a fuel tank. Theres actually still fuel when the gas runs out. But you're still filling the tank to the top.

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You mean so it can lose more capacity before the warranty gets triggered (before it falls under spec?)? There is no protection to keep them from going below normal voltages that I'm aware of.

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Ped said:

He cannot seem to grasp that the extra internal capacity is so the end user actually gets the full 100Ah without actually taking the internal battery below 10%, and not to magically hide the top end and force a faux top balance

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Battle Born batteries are 103Ah because they have 120 cells and they capacity test them to check.

3.2V x 3.4Ah = 10.88wh per cell

10.88wh x 120 cells = 1305.6wh actual tested capacity in Will's tear down video.

Yeah Will said that was smart derating the 100Ah.

12.8v x 100Ah is 1280wh
So Battle Born underates their battery by about a whopping 25 watt hours
They could legitimately label their batteries at 103Ah but they stick to saying 100Ah.

The Battle Born tech laughed about them hiding or limiting battery capacity. Those 103Ah are available under their 100% discharge from 13.6 volts to 10 volts as proven in Wills capacity test.
I also think a 120 cylindrical cell battery is superior to a 4 cell prismatic battery that a lot of people here are assembling with a BMS.

MBR said:

...
The Battle Born tech laughed about them hiding or limiting battery capacity. Those 103Ah are available under their 100% discharge from 13.6 volts to 10 volts as proven in Wills capacity test....

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Great sense of humor on that tech! I can't wait to hear how this story continues to develop; tell him about how Tesla holds back a good chunk of AH, maybe we can get an actual engineer rofl-ing soon b/c it's j-u-s-t such an insane idea right? silly Tesla...what were those guys thinking? It's clearly a bad idea since a tech somewhere else laughed about it (this iteration of the story). I'm still laughing too, it's just sooooo funny to assume 2 good companies might have the same best practice. bwaaaaahaha. phew, time to breath.