Gotta keep it in perspective. For example Concorde does not want their lifeline charged at 10 amps or 10% amp hour value. The tipping point seems to be when incomplete charge is performed repeatedly.
This was the answer to the giant "Duh?" I had to hammer into the heads at Optima several years ago. They didn't want to believe it but the poor engineer I fought for thee hours on the phone to talk to, heartily agreed. That phone call revealed the monkeys were running the zoo. Sadly, it's the same all over. I chatted with Rolls a few days ago and it took me two tech questions to reveal I was talking to an applications engineer. Real engineers are locked in the dungeon under the watchful eye of The Knight Of The Realm. I must have signed six dozen non-disclosure agreements (get this - they were 99-year contracts!) Without exception they are strict - I am forbidden to reveal the nature of the tests I performed never mind the results. Those knotheads can issue injunctions, summons, which if violated, can lead to arrest warrants, denial of passport, on and on. Battery peddling is a bare-knuckle business. They take things seriously.