Questions tagged [battery]

Concerning devices that store electrical power which can be used to run various devices in the absence of external power.

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1answer
86 views
+50

IPhone X randomly crashing while in use

This started yesterday morning, and crashes about every 20 min or so of use, it was fine all night. And when it crashes, I get this red spike in battery performance. What’s going on and how do I fix ...
2
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0answers
16 views

Check system logs for “Service Battery” entry

I would like to find evidence of when the "Service Battery" warning has been activated. I knoow the console.app exists, but I'm not sure how to query it for what I am looking for. Why I want to do ...
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0answers
26 views

Frequently Have to Reset SMC to turn on MacBook

So over the last 2-3 weeks my 2014 13 inch MacBook Pro has developed an issue. I have to reset my SMC in order to power it on. This has occurred about 4-5 times. Additionally, my battery is on it's ...
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0answers
25 views

MBP shuts down at 40%~ battery, and recalibration didn't help [duplicate]

EDIT: I don't think this is a duplicate question. My MBP is only 2 years old and its battery cycle count is only 90. I have a MacBook Pro (13-inch, 2017, Four Thunderbolt 3 Ports) with macOS 10.12.6, ...
0
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0answers
159 views

My MacBook Air (13-inch, 2017) does not go to sleep after Mojave update [10.14.3]

Ever since upgrading to the latest version of Mojave[10.14.3], my MacBook Air (MBA) (13-inch, 2017) refuses to sleep with the lid down in the default settings on battery power. This leads to severe ...
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3answers
176 views

MacBook without battery kernel_task 100% CPU utilization

After removing the battery from a MacBook late 2009 following a battery fault, the computer always runs kernel_task at 100% CPU utilization. I assume the process ends up in some kind of spin lock when ...
0
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2answers
47 views

What to do if MacBook Pro 2017 uses more wattage than the charger can give?

I wanted to ask, what to do if MacBook Pro 2017 uses more wattage than the charger can give? Why I am asking this or thinking this might be a problem? I tried to play some games on BootCamp (playing ...
2
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0answers
64 views

Standard charger for Macbook Pro insufficient [duplicate]

I recently bought a MacBook Pro (15-inch, 2018) and I am using the OOTB Power Adaptor (87W) and USB-C cable. I am finding that when I run computationally expensive processes (e.g. I utilize multiple ...
3
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0answers
34 views

My iPhone 7 Plus died after being exposed to cold weather and a bit of rain. Will I be able to retrieve my data?

My iPhone 7 Plus won't respond to a hard reset. I'm not able to switch it on either. The phone detects the Home button being pressed only sometimes. I haven't backed up my data in a long time and ...
3
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2answers
53 views

Does charging to 100% damage an iPhone battery

I have an XR and as I am indoors a lot of the time, my phone does spend a few hours charing at 100% (although I unplug at night). It's rare that I let the phone run past 80% and even rare that it ...
2
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0answers
29 views

Fluctuating battery capacity in coconutBattery

I am a new MacBook user. I have a problem with my battery. When I tried to see its stats from coconutBattery, sometimes it said 6200/6667(93%) and sometimes it said 6560/6667(97%) to be the full ...
5
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3answers
144 views

Maximize iPhone battery lifespan by keeping it plugged into power whenever possible

I know, sometimes it can explode, but is it a good advice to let the iPhone - whenever possible - plugged in to a power outlet in order to maximize battery lifespan (so it's almost always at 100%)? ...
2
votes
3answers
34 views

MacBook Pro immediately shuts down when disconnected from charger, auto starts when opening MacBook, even after shutdown

I am running macOS 10.14.6 on a late 2013 MacBook Pro. The system immediately shuts down when the charger is unplugged. Oddly, even after intentionally shutting down the computer, it auto-starts ...
23
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5answers
23k views

Is the Macbook 12 inch's USB-C charger interchangeable with other USB-C chargers or devices?

If there is only the Macbook 12 inch USB-C charger nearby, can it be used to charge other USB-C devices, such as any Android phones that also use USB-C? (will it "too powerful" and damage other ...
0
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0answers
33 views

Low Battery Notification for All Devices

Is it possible to get "low battery" notifications for all the devices that are connected to my iPhone? I have AirPods and Apple Watch connected to it. I know I can see the battery levels in the "...
0
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1answer
26 views

Can I charge a DC 5V - 2.15 A power bank with an Apple Macbook charger?

Can I charge the following power bank with a macbook chager? Power bank input: DC 5V - 2.15 A (Input port: Micro USB) Macbook charger: Apple 29W USB-C Power Adapter: 5.2V @ 2.4A, 14.5V @ 2A (with ...
2
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0answers
17 views

Battery status in menu bar is not changing though It is charging?

My Mac book pro 2015 is charging however the battery status is not changing. But when I toggle the button "Show battery status in menu bar" in Energy Saver it shows the correct battery percentage. So ...
0
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1answer
19 views

set audio alarm for when charger is disconnected

My macbook air is getting old, so the battery is rather unreliable. This means I have to keep it constantly charged, or my computer may shut down suddenly as the battery plummets. But the charger is ...
1
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1answer
32 views

Can a brand-new iPhone be stored in its box long-term?

I purchased an iPhone SE last year but still haven’t opened it. Is it safe to leave an iPhone unopened in its box long-term (at room temperature if that makes a difference) without any negative ...
1
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1answer
74 views

How to minimise the risk of using a MacBook Pro 2015 recalled due to battery faults

My MacBook 2015 pro Retina 15'' has to be recalled by Apple. The reason is that its battery may be a fire hazard; eg macromors. Apple said the repairs can take two-three weeks. Because of my work, I ...
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5answers
3k views

Macbook Pro mid-2015 15" swollen battery

I bought the MBP around 2016 April. Few months ago, around 2018 Nov, bottom of the device appears a bit uneven, with slight gap with my desk. Over past few months, it wobbles more and more serious. ...
3
votes
2answers
163 views

Has Apple indicated that some 2019 MacBook Pros have a fault relating to power, battery or shutdown issues?

I bought a MacBook Pro two days ago and when I was using it for the first time I noticed that when it drops below 40% (20%-40%) it shuts down with no warning and it's impossible to turn it back on ...
2
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1answer
858 views

Apple MacBook Air battery

I noticed a very interesting aspect about the MacBook air's battery over the years. I bought a MacBook Air 2013, and recently I replaced it with the new MacBook Air 2018 13 inch Retina display. I ran ...
2
votes
3answers
2k views

MacBook Pro with shot battery, possible to prevent CPU throttling?

I have a late-2013 MacBook Pro 15" which still has the original battery. It's at 1,144 charging cycles, and a few days ago the battery health was at about 50%, though since then it plunged to 4%. The ...
2
votes
1answer
263 views

Does macOS show battery health for third-party replacement batteries?

My late 2013 13" retina MacBook Pro's battery is on its last legs, and I need to replace it soon. I'm thinking of buying a replacement battery kit from iFixit, and I'm wondering if macOS will be able ...
0
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0answers
17 views

USB-C charger only delivery direct power to Macbook even if battery is not full

I have a USB-C charger 87W which I use for my MacBook Pro 15-inch (2018). It only delivers power to my MacBook but doesn't charge the battery (shows a black icon at the top right-hand corner) even if ...
42
votes
11answers
54k views

How do I debug an out-of-control “kernel_task” process?

Just recently I noticed my battery life having a pretty significant drop and the "kernel_task" process using quite a bit of CPU (a constant 1-6% on my 2.8ghz dual-core i7, 2010 MBP). Obviously I think ...
2
votes
1answer
45 views

Macbook feels a lot hotter than usual; are these temperatures normal?

I have an early 2015 13" Macbook pro with a 3.1 GHz Intel Core i7 processor. I've been having some battery issues lately, that could be been attributed to charging my laptop and plugging in foreign ...
1
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2answers
58 views

Can I get any compensation for 2-week turnaround on 2015 MacBook Pro battery recall?

I have a 2015 MacBook Pro (still under AppleCare) that is covered under the battery recall issue. However, the machine is my primary work computer, and the Apple Store has said that they have to ship ...
2
votes
2answers
55 views

iPhone 5s shows low battery symbol with lightning bolt when plugged in

I have an iPhone 5s, purchased in ~2013. The battery is original and has never been replaced. I have had charging problems with it recently - I needed to wiggle the cable to get it to charge. I ...
2
votes
1answer
24 views

How do I prevent my MacBook Pro from dimming the screen on battery power?

I sometimes work on my MBP in the car (from the passenger's seat, of course) and it is impossible to see anything unless the screen is on the maximum brightness. Every few minutes, however, I have to ...
1
vote
4answers
13k views

Can I run my MacBook Pro on just AC power?

I have a used little MacBook Pro 13 inch Late 2008 5,1 and I was told it needed a battery. It charges, then it doesn't, and it shuts off at the most random times, so the thought occurred to me to take ...
3
votes
2answers
177 views

What is the safest way to leave my MacBook on 24/7 with macOS Mojave?

I used to use sudo pmset -a hibernatemode 25 to try setting my MacBook to hibernate instead of sleep, so that it pulls power away from the RAM/hard drives, etc. and puts the laptop into a proper sleep....
14
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4answers
2k views

What does Apple mean by “This may decrease battery life”?

Does it mean that my battery will "lose capacity" over the years (months?) or that it will just uncharge faster because it's consuming more energy?
1
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0answers
12 views

MacBook Pro 2011 battery not detected

My MacBook Pro 2011 battery is not detected. There is no spill of water or whatsoever on my logic board. One day I took out the battery and when I placed it back the problem occurred. So I tried ...
1
vote
1answer
1k views

Macbook pro disable charging when connected to external monitor via thunderbolt 3 port

I can connect external monitor to macbook via type C port. But the battery starts charging when I do so. This causes the laptop to always be charged at 100% (which is not good for battery life) How ...
4
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2answers
180 views

My brand new MacBook Book Pro dies at 30% with no warning

I got my MBP earlier today and when I'm using it it works just fine but when it dies it gives me no warning and it dies around 30%, I don't know how to fix this issue as it's supposed to have a 10 ...
1
vote
1answer
26 views

How do I know how much time battery has left on my MacBook?

macOS used to show how much time your battery was good for before it died (e.g. 4 hrs and 22 mins). I don't see it anymore though. Now it just gives a percentage. I'm running macOS Mojave 10.14 on a ...
1
vote
2answers
64 views

LG Ultrafine 5K always keeps my Mac charging, is this bad?

The LG Ultrafine 5k Monitor is great for Apple computers. But the thing is that it will always keep your Mac charging, whether you want it or not. Is this bad for the battery life?
70
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10answers
33k views

What are the best practices for battery longevity?

How do you maximize the cycle count of your battery? There seems to be a debate between: Leave plugged in 24/7 but do a full cycle once a month Charge to ~100%, drain to ~10%, repeat. NOTE: Taking ...
2
votes
1answer
979 views

Keep WiFi alive when on battery and lid closed?

We're using a VPN to access certain parts of internal infrastructure from the office; the VPN uses 2FA, so saving credentials and bringing it up with the network when the machine wakes up is not an ...
52
votes
10answers
39k views

Can I manually limit the %CPU used by a process?

I would like to limit the amount of CPU time dedicated to certain processes (e.g. Firefox, Safari, ...). I can't understand why such programs, even when not used (nothing loading, no animations, ...
1
vote
0answers
14 views

My AirPods do not keep their charge nor do they charge in general

I am having trouble charging my AirPods. I only got them a month ago and they were working completely fine. I take very good care of them, keeping them in the box when not in use. I came to charge ...
4
votes
2answers
63k views

Fully charged MacBook Air turns off when power cord removed

I have a MacBook Air, 2009, with a recently replaced Apple battery in December 2012. Recently, when power cord comes off, the computer shuts down. Also, it usually will not restart unless power cord ...
0
votes
1answer
31 views

MacBook Pro Retina 15" (Mid-2015) New battery has weird metering

New battery installed. Charges up to 100%, runs down to 50% then suddenly instantly drops to 7% and stays there for about 2 hours. Battery seems to continue to work but metering is wrong. Tried all ...
0
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0answers
38 views

MacBook Pro late 2013 (Model: A1502) won't boot or respond to any Input

I have a big problem with my MacBook Pro late 2013 it does not boot or light up in any way. Current behavior The only reaction that I get is, when I connect it to the powercord and start with the ...
0
votes
1answer
61 views

How to handle swollen MacBook battery after several weeks of storage?

Several weeks ago, I noticed a swollen lithium-ion battery in an older MacBook laptop. Substantial swelling, the battery looks almost twice as thick as normal near one corner. I initially noticed the ...
8
votes
2answers
167 views

Update MacOS on a MacBook with dead battery

I have a macbook 12'' running sierra that I use occasionally. The battery died some time ago, showing an X in the status bar. I want to update to a new version of macOS but the installer shows: ...
1
vote
1answer
51 views

Macbook Pro keeps waking from sleep during the night and draining battery

My 15-inch MacBook Pro (Touch Bar, mid-2017) has always been plagued by issues with sleep. After not using it for a few months, I started using it again yesterday and found out that during the night ...
27
votes
4answers
49k views

Difference between autopoweroff and standby in pmset

I just got a new Retina MacBook Pro 15". After getting some downloads interrupted due to the computer going to sleep (even on AC power), I started looking at the man page for the pmset command. I did ...