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iOS 13 Introduces New 'Optimized Battery Charging' Feature
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My opinion is because it’s difficult to do this. I’ve had this on a dell and a Lenovo laptop before and it resulted in more problems than benefits. I’d disconnect power and instantly laptop would shut off because the computer didn’t keep battery at 80% but it slowly drained over time. This happened to both my dell and Lenovo.
That and the longevity benefit is not a huge benefit. Some yes.
I am really curious how this works with the "always charging" Apple Battery case. Anyone have the beta that can share some results?
Well that's not good.
I work with batteries and Li overcharge is a big no-no, but I haven't heard much about the 80% rule. I know they let the battery go down to 95% before charging back up. Maybe they will adjust it down a bit if this catches on.
Keeping a battery at 100% is generally more harmful than keeping it at 80%. That's why most batteries don't ship at 100%, because it helps longevity. In the past, keeping a lithium ion charged at 100% would result in rapid deterioration of that battery so that it barely held any charge.
Batteries today are much better at tolerating being at 100% but it is still considered more detrimental to the battery than keeping it at a lower percentage. That said, all my iPhones 6+, 6s+, 8+, and Xs MAX - I've kept plugged in a lot - don't show any abnormal negative signs in the span of 2 years. Over the course of 5-10 years, one would see this more I think.
https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Figure 7: Predictive modeling of battery life by extrapolation.
Li-ion batteries are charged to three different SoC levels and the cycle life modelled. Limiting the charge range prolongs battery life but decreases energy delivered. This reflects in increased weight and higher initial cost.
You guys sound very worried about your Tesla battery. Is that not covered under lengthy warranty as it’s a key part of the drive train!??
Those are best practices recommended by tesla. And no I’m not worried about the car. It’s like any car that has recommended stuff. Gas cars have a recommended oil change interval, recommended tune up, etc to keep the car running safe. Same with transmission having “life time oil” but really, it needs to be changed at some point imho. There’s pretty big consequences in the gas cars by not following these recommended service.
Our electric cars have these recommended practice to charge to 90% or less for daily use and 100% for long distance (like when I took my car to Death Valley I charge 100%, cause you know, hot Death Valley lol). I believe other electric cars have such practices but correct me if I am wrong or EV drivers.
Sony have been implementing this feature in their smartphones for a few years now, glad Apple got it on board to! 
My XS Max should last longer then.
My XS Max should last longer then.
Does this work on a Qi cradle? Buddy using Lightning cable shows the graph of holding charge at 80% until an hour or so before waking up but my X on cradle shows full charge through the whole night...
