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配件指南问题解答论坛

于2019年11月发售的MacBook Pro 16''的维修指南和拆解信息。型号A2141，EMC 3347。

20 个问题 查看全部 | 34配件 购买

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Optimized Battery Charging Good or Bad?

Hello, I recently purchased a 2019 MB Pro with a 161 battery cycle count. I am the type of laptop user that I very rarely (about once every night) use my laptop off the charging cable for no more than an hour (From 80% to 74%). Since I'm always working from my desk I figure I might as well keep it plugged in but Im trying to find out what to do to help prolong my battery life and make sure I'm not causing any unhealthy habits that will deteriorate it sooner.

So far I've noticed ever since I started using apples built in OBC it does this thing where it charges from 75% to 100% and drains back down to 80% about an hour after I boot up the laptop first thing in the morning. My battery cycle count has gone up by 10 in a week since I started using OBC and I'm not sure if its the right thing to be doing? Does anyone have any tips on if I should turn it off and use al dente (limit battery charge to 80% only)? I really dont know why OBC charges my laptop up to 100% every morning and not 80% since it should know that I'm not going to be using it off the charger. What is the point in charging it up to 100 and then draining to 80%? It seems like this is only racking up my cycle count and not helping out my battery at all. Any tips guys? Gladly appreciate them, thank you very much for your kindness and knowledge. Take care

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Hi,

Apple's Optimized Battery Charging (OBC) is designed to reduce battery wear and improve battery lifespan by learning your daily charging routine. The behavior you're noticing, where it charges to 100% and then drains back to 80%, is part of how OBC works. The system might charge to 100% in the morning in anticipation of potential usage away from the charger. If your MacBook Pro consistently stays plugged in, the OBC might not be fully optimized for your use case.

A cycle count increase by 10 in a week seems unusual, especially if you're mostly using it while plugged in. A cycle count is equivalent to using 100% of your battery's capacity, but it doesn't have to be used all at once. It might be worth checking with Apple Support to ensure everything is functioning as expected.

Hope this helps,

BR

Francis

CelMetro

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@paskalr1 Hello and thank you kindly for your response Francis, I greatly appreciate your knowledge on the subject matter. You are right I think the system anticipates use away from the charger thus why it charges up to a full 100% in the morning and gradually drains back down and stays at a solid 80%. I think this is a great feature as even I do not know whether or not I will be pulling away from the work table and need to take my laptop with me which in turn would be better to have a charge of 100% rather than 80%, however Id still like to be able to gauge/monitor this process on my own and charge to 100% only when I actually want to. Perhaps using an app like alDente to keep my laptop charged only to 80% would suffice in what I am trying to achieve in my case as the constant charging up to 100% is really wearing my battery down I think more than it needs to. I haven't let the laptop drain down anywhere below 75% since I got it a couple weeks ago

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@paskalr1 ....and the battery cycle going up by ten in a week may have been an exxageration due to my annoyance with the issue I'm facing. It is still strange in my opinion to observe the cycle going up at all since I do not let it drain anywhere lower than 75%... How does that make sense then you know that I even get 1 full cycle count, maybe I'm just not understanding the process in which a cycle is performed. Thanks again for your knowledge and opinion, all the best.

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Over the years Apple and the other laptop makers have improved the battery chemistry as well as the electronics, you are still smarter than the computer!

The problem is the idea of having a fully charged is not the ideal charge if you want the battery to last longer. The ideal level is 80% if you leave the device plugged in all of the time. The newer M series systems do that automatically (if you enable it), sadly the older Intel systems don’t.

With the older Intel systems you need to run the system on battery often enough so the battery gets exercise yet doesn’t drop below 40% so you don’t chew a cycle count.

Then we have the age issue! Lithium Ion batteries chemistry breaks down just from age (about five to seven years) and remember the cycle count is around 1000 so far you have just gone over 15% of its total cycles.

So the race is on which will happen first! Is the age of the battery the factor or burning cycles?

To help you see things more effectively I would recommend installing a good battery monitor app like CoconutBattey I’ve used it for years and find it’s the best App for the job.

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@danj Hey Dan, thanks for your knowledge and info. The OBC seems to be doing a great job at keeping my laptop charged only to 80% when plugged in, I just wish it didn't charge all the way back up to 100% every time I remove the charge cable or when I boot my laptop up in the morning. Perhaps it's good to charge it up to 100% and let it drain back down to 40% from time to time but considering I never leave my house with my laptop or use it anywhere else besides my table its sort of not necessary for me to go to those extremes. I think I'll download alDente and give it a try, at least I can keep the laptop charged 80% max at all times. And as far as the cycle counts go I have no idea why my charge cycles counts are racking up considering I never let my laptop get anywhere below 75% charge, maybe I'm missing something here..

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@tashi108 - Let’s get a snapshot of CoconutBattery so we can see things a bit better, posing it here.

由完成的

@danj Hi Dan, uploaded as you requested. It's at the top of the page under the last paragraph.

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@tashi108 - Your battery is not charging as the system is too hot! Try to find a cooler place.


Note the Full Charge Capacity is a little over 75% and note the Charging With is currently Zero Watts with the charger connected, and lastly the batteries temp is 30.9C (87.63F) SMC will suspend charging around 28C (176F)

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@danj No I have the battery charge limit tapped at 80% with aldente thus why you don't see it charging and the laptop elevated at all times so the reading you're giving me is incorrect in this case. Also I recently learned it's better to charge on the right side of the laptop instead of the left due to overheating issues. I'm not sure why the battery is at that temp tbh but it goes up and down depending on the level of use. I also always have an external drive running but that shouldn't kick up the temp of the charge/battery or would it? All I'm trying to find out is why I'm getting charge cycles when my battery isn't going below 75% daily, unsolved mysteries 😂

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