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Apple changes default MacBook charging behavior to improve battery health

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Re: Apple changes default MacBook charging behavior to improve battery health

#11

For people who use their laptops primarily as plugged in machines, there should be a 50% max charge mode.

Why 50%?

the optimal charge state for long-term storage of a lipo cell is about 33%. 50% is a nice buffer on top of that if you use it unplugged for an hour or so, then put it away.

Re: Apple changes default MacBook charging behavior to improve battery health

#12

For people who use their laptops primarily as plugged in machines, there should be a 50% max charge mode.

I keep my MacBook Pro 16" plugged in 80% of the time, but when I want to go work at a coffee shop on battery having 50% would be a big inconvenience. How much longer in terms of battery life are we talking doing 50% charge vs 100%?

Re: Apple changes default MacBook charging behavior to improve battery health

#13
post #4

I wish they'd give us the option (on the iPhone and iPad as well) to arbitrarily set the maximum charge level. Just like on my Tesla, I'd like to be able to tell my phone not to charge above 80%.

Then 500M people complaining on Reddit that their phones only charge to 80% for some reason.

you can mostly fix this issue by hiding the option in "developer settings". on android, there's a lot of weird stuff buried in here but you never hear people complaining about it.

Re: Apple changes default MacBook charging behavior to improve battery health

#14
post #4

I wish they'd give us the option (on the iPhone and iPad as well) to arbitrarily set the maximum charge level. Just like on my Tesla, I'd like to be able to tell my phone not to charge above 80%.

Then 500M people complaining on Reddit that their phones only charge to 80% for some reason.

[deleted]

Re: Apple changes default MacBook charging behavior to improve battery health

#15

Earlier quoted context omitted.

Why 50%?

the optimal charge state for long-term storage of a lipo cell is about 33%. 50% is a nice buffer on top of that if you use it unplugged for an hour or so, then put it away.

The use case here is plugged in and, presumably, using the laptop, not storing. Is 50% still the ideal charge state, in that case?

Re: Apple changes default MacBook charging behavior to improve battery health

#16

PSA: If you have a thinkpad, the lenovo settings app lets you control this too. In lenovo vantage, go to Device > My Device Settings > Battery settings > Battery Charge Threshold.

The Dell XPS 13 also offers an interface in the BIOS that lets you set a charge limit, hours not to charge the laptop, and a bunch of other great controls.

The only big issue is that they don't expose it through a friendly UI within Windows 10. It's nonsense that I need to go to the BIOS to tweak these settings.

Re: Apple changes default MacBook charging behavior to improve battery health

#20

I wish they'd give us the option (on the iPhone and iPad as well) to arbitrarily set the maximum charge level. Just like on my Tesla, I'd like to be able to tell my phone not to charge above 80%.

Note that essentially all modern battery systems essentially do this under the hood. The "100%" shown to the user isn't the most you could charge the cells, just as high as you want to charge it to meet lifetime degradation targets. Tesla just goes a bit crazier here and exposes more headroom because they can rely on drivers being more involved in charging strategies.
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