Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I thought so too however it means that full charge capacity is being weakened and you have no control over it. Just another apple 'feature' I guess where you cannot even control your battery. I don't want it to be artificially lowered, just limit full charging to 80%. Sometimes I am out for a whole day or days where I could use 100% of my battery.
With or without this feature you still don’t control your battery. There are a ton of decisions being made in the charge circuit that aren’t exposed— constant current levels, constant voltage levels, trickle charge rates, temperature considerations, etc, etc, etc. Each decision represents a trade off that Apple made on your behalf.

Trust me, you don’t want control. Accept the fact that if you’re going to buy an Apple product, they’re going to make decisions for you.
 
I'd argue it. The small utility called AlDente does a much better job at prolonging battery life by allowing the user to set a maximum charge percentage before battery charging stops. I set mine at 50% max and keep my 2020 13" MBP plugged in all the time. If I know I'll be on the go then a simple click to 100% and I'm good to go.

I fitted a new battery this summer and already it has cycled 140 times and shows 89% health, really disappointed and had thought a few times that something like this would be good but never took the time to research it. After reading your post I have located and installed AlDente. Thank you.
 
  • Like
Reactions: Big Ron
Not all Intel-Macs. 2015 MBPr -

Screen Shot 2020-11-18 at 3.55.50 PM.png
 
  • Like
Reactions: Big Ron
It's your computer. You paid very, very handsomely for it. You're supposed to be able to do what you want to it.
Exactly. And since I'll be the one paying if the battery ages prematurely, I would just as soon make that choice myself if I prefer to always get it charged to 100%. Sure, enable the feature by default, but not letting the customer who bought the computer manage that is waaay too controlling for my tastes.
 
  • Like
Reactions: cfdlab and Natzoo
...so you just want the “control” of destroying your battery’s lifespan for reasons I suppose?
Are you saying that Apple is supplying defective batteries that cannot hold their capacity like normal lithium Ion batteries? I'm not sure you are looking at what you are typing because how am I destroying the battery if I am using it like it was designed?

We just want an option to turn it off, I understand that the battery in the MacBook is supposed to last 1000 cycles efficiently, right? I appreciate how it holds off charging to 100% until needed but this is too much in my opinion, or maybe apple should release a "pro" battery ;) for people who destroy their computers.
 
  • Like
Reactions: ignatius345
...so you just want the “control” of destroying your battery’s lifespan for reasons I suppose?
Yeah. Maybe I do want to charge my battery to 100% every time I charge it, for reasons that are absolutely none of your business. Since I paid for the computer and will pay for any battery replacement that's my prerogative -- just as it's my prerogative to take care of my other possessions in whatever way I choose, provided it doesn't infringe on someone else's rights. You gonna tell me next I can't leave my refrigerator open too long because it stresses the compressor motor, or some such? Get real.
 
Exactly. And since I'll be the one paying if the battery ages prematurely, I would just as soon make that choice myself if I prefer to always get it charged to 100%. Sure, enable the feature by default, but not letting the customer who bought the computer manage that is waaay too controlling for my tastes.
I'm surprised that there is a pro-life vs pro-choice debate for battery control, a very interesting thread.
 
Yeah. Maybe I do want to charge my battery to 100% every time I charge it, for reasons that are absolutely none of your business. Since I paid for the computer and will pay for any battery replacement that's my prerogative -- just as it's my prerogative to take care of my other possessions in whatever way I choose, provided it doesn't infringe on someone else's rights. You gonna tell me next I can't leave my refrigerator open too long because it stresses the compressor motor, or some such? Get real.
Agreed.

Happy to have the option, but want the choice.
Maybe I'm going to be without a way to charge it and want to make sure the battery is full before I go. Software can't predict that.
 
  • Like
Reactions: ignatius345
Yeah. Maybe I do want to charge my battery to 100% every time I charge it, for reasons that are absolutely none of your business. Since I paid for the computer and will pay for any battery replacement that's my prerogative -- just as it's my prerogative to take care of my other possessions in whatever way I choose, provided it doesn't infringe on someone else's rights. You gonna tell me next I can't leave my refrigerator open too long because it stresses the compressor motor, or some such? Get real.
So buy something that lets you do that. Problem solved.

Honestly guys, give it a week or two and someone online will give you the damn terminal commands to disable this. Have a little faith in the enthusiast coders that are just as ludicrously upset about it as you are.
 
I'm surprised that there is a pro-life vs pro-choice debate for battery control, a very interesting thread.
That's hilarious and even more funny because the article is wrong and you can disable it if you choose. So the M1's did ship with the option of birth control
 
  • Like
Reactions: Natzoo
Be nice to have an option to disable the battery altogether since it’s plugging in all the time. :rolleyes:
 
It's not unrelated. It's basically the same with little differences.
Maybe on silicone Macs there is no need to reduce CPU performance since silicone Macs don't drain the battery like Intel Macs, but other than that it seems to by just a different wording.

Here is how apple describes this very feature (battery health management):

"The battery health management feature in macOS 10.15.5 is designed to improve your battery's lifespan by reducing the rate at which it chemically ages. The feature does this by monitoring your battery's temperature history and its charging patterns.

Based on the measurements that it collects, battery health management may reduce your battery's maximum charge when in this mode. This happens as needed to ensure that your battery charges to a level that's optimized for your usage—reducing wear on the battery, and slowing its chemical aging. Battery health management also uses the measurements to calculate when your battery needs service.

While battery health management benefits your battery's long-term lifespan, it can also reduce the amount of time your Mac runs on one battery charge when capacity limits are applied."

Difference is: health management may temporarily reduce battery capacity limits which optimized charging may or may not do. Didn't read anything regarding that point.
Just wanted to point out its silicon. Silicone is what you seal your shower with or make breast implants out of. Both processors are made out of silicon by the way too.
 
  • Like
Reactions: ignatius345
Didn't they throttle the speed and got sued? They should kept this as default but could be disabled.
You have no idea what you’re talking about. I, unlike you, do — I’m an electrical engineer, I’ve designed Li-Ion battery-powered products, and I’ve read dozens of actual scientific papers, on peer-reviewed high-impact journals, about battery lifespan.

The Apple feature tries to predict when you’re going to need 100% battery charge, and time the charges that way. To maximize battery lifespan, the main thing it can do is keep it at a lower charge (e.g. 60% seems to be an ideal value) for as long as possible. Batteries degrade much much much faster when near 100% state of charge than when at 60% or even 80%.

I, unlike Apple, actually know when I’m going to need 100% charge. In my case, the answer is: never — OK, maybe once or twice a year, but this year I’ve yet to purposefully charge it beyond 60% (using the AlDente app to control the state of charge).

So, Apple may have the best and brightest engineers of the world. Maybe they can do the very best, state of the art machine-learning mumbo-jumbo (actually, from my experience it’s crap — optimized battery charging doesn’t work for me in the iPhone at all — but let’s pretend for a moment that it’s not crap). Unfortunately one thing that’s beyond Apple is predicting the future: i.e. when will you need 100% charge, so you can start charging it exactly X minutes before so the moment you unplug it, it’s at 100%. Since it can’t do that, those that care enough about managing their battery will always be able to do better. It’s simply impossible to argue with that.

So if you are an electric engineer whats best way to maintain modern batteries?
1) have it always plugged in at 100%?(Some people surprising buy laptops but use it as desktop idk)
2) Drain it fully and then charge it to 100% and pull out the electric supply?
3) keep it floating between 40% and 80% ?

I have macbook for 3 years now for 4 years it has 242 cycles and battery still impressive imo.
 
Great post! I don't have much knowledge on the matter other than 50% charge level is the most ideal charge state of a battery?

With that in mind, and given I also mainly use my laptop as a desktop via USB C monitor most of the time, I think I will download this AlDente app.

Sorry if this is a stupid question, but if I ask the app to maintain the Mac at 50% charge, does that mean all 4 of the battery cells inside are at 50%? Or does that mean 2 cells are 100% and the other 2 at 0%?

Thanks for your help
Yes, all 4 battery cells are at 50%. Multi-cell batteries quite often have cell balancing circuits to make sure any small imbalances are promptly corrected, if budget allows (and in Apple's case, I'm sure there's plenty of room in the budget for this).
 
Didn't they throttle the speed and got sued? They should kept this as default but could be disabled.


So if you are an electric engineer whats best way to maintain modern batteries?
1) have it always plugged in at 100%?(Some people surprising buy laptops but use it as desktop idk)
2) Drain it fully and then charge it to 100% and pull out the electric supply?
3) keep it floating between 40% and 80% ?

I have macbook for 3 years now for 4 years it has 242 cycles and battery still impressive imo.

In my reading of the scientific literature, I've identified four main factors that, each to a different (and somewhat unknown) extent, will help in prolonging the lifetime of batteries. I'll list them in what I understand to be the order of importance, most important first.

(a) Avoid heat. Turn off the laptop when not necessary, and if performing intensive processing, ensure an adequately cooled environment, avoid blocking the fan ducts. If possible, periodically clean inside the computer -- I know from personal experience that a lot of dust accumulates there. Heat is the worst enemy of a battery

(b) Reduce the number of cycles in the battery. If you put enough cycles in the battery, it'll degrade, regardless of whether you do everything else right. You can only postpone the degradation, but not prevent it indefinitely. So the best thing you can do is -- if there's a nearby outlet, plug it in. Lately I've even been using a power bank to reduce the rate of discharge on my MacBook Pro while I'm away. Yeah, defeats the purpose of having a light, battery powered laptop -- I agree 100%. Problem is, Apple charges a fortune to replace the battery on the MacBook Pro, and I refuse to pay for that (it's the equivalent of 1.5 to 2 monthly minimum wages in my country, just so you have an idea), so I am forced to resort to desperate measures like this.

(c) Avoid keeping the battery at a high state-of-charge. 100% is awful, 80% is much better, 60% is just perfect. This is what the AlDente app does.

(d) Avoid charging and discharging at a high rate. This appears to be more important for very fast charge/discharge (say, when you deplete the whole battery in < 1 hour, or recharge it that fast, which is supported in the iPhone but not the Mac). Prefer to perform any CPU-intensive tasks with the battery plugged in. Ideally, you'd use an undersized charger to charge the computer overnight when necessary -- for instance, a 30W charger for the MacBook Pro. But at this point you may as well compete for the world record of battery longevity -- economically it makes no sense to buy another charger just for this, plus the benefits are just too small.

So to answer your question: your option (1) is awful because of my point (c), and yet basically it's what used to happen before optimized charging (at least in the Apple ecosystem). Option (2) is awful because of point (b) and also point (c) -- it's only good to ensure the gas gauge IC is kept calibrated, but otherwise you're needlessly wasting cycles. In fact, the recommendation to drain it periodically has to do, as far as I'm aware, with recalibrating the gas gauge IC. Option (3) is bad if you're purposefully connecting and disconnecting the power adapter to ensure this state of charge (because of point (b)). The "right" way to do this is using an app like AlDente which keeps it at a set state-of-charge indefinitely -- it just stops draining more power from the power adapter than is required to keep the battery at its current state of charge. So you can keep the power adapter on, and the battery won't charge. This is what I recommend doing. Apple's optimized charging tries to do something like that, but since it assumes you'll need the battery at 100% at some point, you can't prevent it from fully charging the battery -- with AlDente you can. And that's why I want Apple to give me the choice -- so I can use AlDente to manage it myself.
 
I'd argue it. The small utility called AlDente does a much better job at prolonging battery life by allowing the user to set a maximum charge percentage before battery charging stops. I set mine at 50% max and keep my 2020 13" MBP plugged in all the time. If I know I'll be on the go then a simple click to 100% and I'm good to go.
This actually works? How? Is it by keeping the charge cycles of max to min from happening?
 
In my reading of the scientific literature, I've identified four main factors that, each to a different (and somewhat unknown) extent, will help in prolonging the lifetime of batteries. I'll list them in what I understand to be the order of importance, most important first.

(a) Avoid heat. Turn off the laptop when not necessary, and if performing intensive processing, ensure an adequately cooled environment, avoid blocking the fan ducts. If possible, periodically clean inside the computer -- I know from personal experience that a lot of dust accumulates there. Heat is the worst enemy of a battery

(b) Reduce the number of cycles in the battery. If you put enough cycles in the battery, it'll degrade, regardless of whether you do everything else right. You can only postpone the degradation, but not prevent it indefinitely. So the best thing you can do is -- if there's a nearby outlet, plug it in. Lately I've even been using a power bank to reduce the rate of discharge on my MacBook Pro while I'm away. Yeah, defeats the purpose of having a light, battery powered laptop -- I agree 100%. Problem is, Apple charges a fortune to replace the battery on the MacBook Pro, and I refuse to pay for that (it's the equivalent of 1.5 to 2 monthly minimum wages in my country, just so you have an idea), so I am forced to resort to desperate measures like this.

(c) Avoid keeping the battery at a high state-of-charge. 100% is awful, 80% is much better, 60% is just perfect. This is what the AlDente app does.

(d) Avoid charging and discharging at a high rate. This appears to be more important for very fast charge/discharge (say, when you deplete the whole battery in < 1 hour, or recharge it that fast, which is supported in the iPhone but not the Mac). Prefer to perform any CPU-intensive tasks with the battery plugged in. Ideally, you'd use an undersized charger to charge the computer overnight when necessary -- for instance, a 30W charger for the MacBook Pro. But at this point you may as well compete for the world record of battery longevity -- economically it makes no sense to buy another charger just for this, plus the benefits are just too small.

So to answer your question: your option (1) is awful because of my point (c), and yet basically it's what used to happen before optimized charging (at least in the Apple ecosystem). Option (2) is awful because of point (b) and also point (c) -- it's only good to ensure the gas gauge IC is kept calibrated, but otherwise you're needlessly wasting cycles. In fact, the recommendation to drain it periodically has to do, as far as I'm aware, with recalibrating the gas gauge IC. Option (3) is bad if you're purposefully connecting and disconnecting the power adapter to ensure this state of charge (because of point (b)). The "right" way to do this is using an app like AlDente which keeps it at a set state-of-charge indefinitely -- it just stops draining more power from the power adapter than is required to keep the battery at its current state of charge. So you can keep the power adapter on, and the battery won't charge. This is what I recommend doing. Apple's optimized charging tries to do something like that, but since it assumes you'll need the battery at 100% at some point, you can't prevent it from fully charging the battery -- with AlDente you can. And that's why I want Apple to give me the choice -- so I can use AlDente to manage it myself.
Based on the heat aspect it seems that induction (wireless charging) would be the battery killer as it is heat heat heat. What do you think of that?
 
I think the complaints are coming from the lack of control, think about it, you don't even control your own battery now. It is now a permanent rental device and while the battery life is great on the M1 chip, what about down the road where it's artificially limited to 75-80% charge capacity (on intel chips, the battery service would pop up and disappear once management was turned off).
I don't have problems not controlling the precise charge in my Tesla's battery. The Battery Management System software and the ML model in it do that better than I could ever hope to.
 
I wouldn’t be surprised if this was a temporary issue that they just haven’t Yet written the code to fix. After all, no one needs this feature day one — a point release fix in a few weeks just fine.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.