Limiting Charging to 80%

In an ideal world the incentives on phone manufacturers would be to optimize useful lifetime, but instead people buy phones based on their as-new performance. Which means phones charge to 100% even though that's bad for the battery. Every time I get a new phone it feels a bit like magic: I no longer need to think at all about battery life. This lasts for a few years, and then at some point my phone doesn't always make it through the day. Some amount of this is normal, but some of it is just bad battery management: new phones should come set not to charge past 80%. Charging a lithium-ion battery to 100% wears it out much faster than stopping at 80%, and when a phone is new 80% of the battery is usually plenty. With past phones I've just grumped about it, but Pixels now have a setting: battery and charging > charging optimization > limit to 80%: I've made the same change to my Mac, since that spends most of its life plugged in (but just enough unplugged that the battery preservation…

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