[10 Mar 2024 14:14:14] also btw, even this top end issue, is imho very overplayed. overcharging a cell is always bad, but the difference between charging a cell to 4.2V vs 3.8V and leaving it there for a matter of hours before it gets significantly discharged, is essentially nil [10 Mar 2024 14:14:57] if you're going to leave it on a shelf for months, care. if its your phone getting to 100% and staying there for 2 hours before you unplug it, dont stress your heart out - the greater factor in battery longevity will simply be usage [10 Mar 2024 14:15:36] ie, in most cases it's better to leave your phone plugged in and at 100% when you're on a marathon 5 hour call, rather than cycling the battery down to 10% then back up to 80% [10 Mar 2024 14:16:11] that cycling is the primary "usage factor" - the other things are micro-optimizations [10 Mar 2024 14:21:53] the quickest way to kill a cell is to overcharge it, the next the quickest way is to leave it discharged, the next is to cycle the heck out of it, and the next is to float it at 100% charge [10 Mar 2024 14:22:37] so if you leave it at 60-80% charge, you'll get the maximum possible lifespan from the cell - but that doesnt mean you'll meaningfully extend the service life of the cell very far beyond what it would've been if you had've been less sparing with usage [10 Mar 2024 14:24:34] if a cell lasts 5 years, perhaps it'd only last 4 years if held at 100% charge. On the other hand, perhaps every full cycle costs you a week off that timeline, meaning that after 200 cycles in a year, its already near ruined anyway, regardless of what you did with charge care [10 Mar 2024 14:25:49] so yeah, theres some wide range in there of cycle endurance vs shelf life [10 Mar 2024 14:26:32] which is why we have so many chemistries XD