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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26 views

My 13” MacBook Pro 2020 Thunderbolt port not working/charging

I bought this brand new MacBook Pro few weeks ago, now one of the two Thunderbolt ports are not working. When the MacBook starts, the battery icon is black filled with a bolt inside. The system ...
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1answer
21 views

Macbook Pro 2015 Lid seemingly overnight stopped from closing properly

When I plugged my Macbook Pro (Early 2015) yesterday, the lid was closing perfectly. This morning I woke up early and left without checking on the laptop. 8 hours later, I came back and realized the ...
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1answer
35 views

What is this “web” icon in iOS battery usage?

Does anyone know what this “web” icon is under battery usage in iOS 13.6 ?
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1answer
77 views

MacBook Pro 16" battery drains overnight

I've had this Mac on Catalina 10.15.5 for a few weeks now and suddenly noticed this battery drain overnight. It went from 60% to 3% two nights ago and happening last night too. After doing some ...
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16 views

Macbook Pro never shuts down

I've got a Macbook Pro 2020 13 inch (10th gen CPU) and I can't get it to shut down so it won't consume any energy. Methods I used are: (1) Hold down power off button (top right) for a long period of ...
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24 views

MacBook Pro will not boot - shows “low battery, charging” screen

I have a 15" MacBook Pro (2015 Retina). On Friday I closed the lid, disconnected from power and put it away. Today, I tried turning it on but I got the low battery screen. Little surprising but I'...
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2answers
48 views

MacBook Air 2015 MagSafe charger is too hot to touch

In the last couple of weeks, I've noticed my charger connector (the part which connects to Mac) is too hot to touch and also there are some pins a bit burnt (it is happening slowly but getting visibly ...
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20 views

In macOS, are there settings/apps that would 'grab my attention' when battery is running out?

I have been Windows user all my life, just got MacBook Pro through company. I use multiple external monitors and often get deeply buried into one of them. What's annoying is whenever the battery is ...
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1answer
31 views

How to find watt hours of MacBook?

I see the latests Macbook Pro 16" has a 100 watthour battery - how do I find the equivalent stat for my current Macbook given the info under About -> System Report -> Hardware -> Battery ...
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4answers
226 views

MacBook Pro randomly discharges from 100% to ~90% when plugged

My 15 inch 2018 Mac Book Pro with Mojave 10.14 randomly starts draining battery when plugged in. When I try to move the cable, change the power cable to a different USB slot nothing helps. The battery ...
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2answers
1k views

MacBook Pro battery drains when connected to AC power

I've been experiencing a very annoying problem lately. Often, I've got my MacBook Pro connected to power when I'm working from the office. At home, I often leave it unplugged until the battery is too ...
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2answers
18k views

Is it safe to charge a MacBook Air after the green LED shows?

Is it safe to charge my macbook after the green light shows? Would it not overcharge the battery, or reduce its lifespan? I've heard that doing this is completely safe and it increases the cycles or ...
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Battery Full Alert [duplicate]

Is it possible/necessary to configure a "Battery is full, remove charger notification" similar to the Low Battery Alert? I run macOS Sierra on my computer and wonder what software or scripts or ...
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30 views

Macbook Pro 2019 and Dell D6000 docking station battery charging [duplicate]

I've recently purchased a Macbook Pro 2019 and I'm using it with my existing Dell D6000 Universal docking station to render three HD displays. The display set up is working perfecly. I've connected ...
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4answers
1k views

Battery is draining with “Power source: Power adapter” in macOS Catalina

I've noticed a strange problem with my 2018 MacBook Pro. Sometimes, when I use it with the (original) adapter, it says that the power source is power adapter, but the battery is still draining and not ...
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0answers
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All apps using significant energy on new machine (MBP 13", 2020)

I have a brand-new MBP 13", 2020 with high-end specs (i7, 32GB, 1TB HD). I've always had MacBook Pros in the past, but this one takes the longest to start up (around 4 minutes) and no matter ...
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6answers
72k views

How to disable the SpeedStep when using MacBook Pro without a battery?

First of all, the specs: MacBook Pro (15-inch, Early 2011) OS X 10.9.1 (Mavericks) 2.3 GHz Intel Core i7 8 GB RAM The Problem Recently, my battery randomly died and I had to disconnect it, otherwise,...
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1answer
254 views

MacBook shows flashing question mark in a folder when battery is at > 70%

I am sure many of you guys know the flashing folder icon which shows up when the Mac cannot find a drive to boot from. My 2017 MacBook Pro has this issue for some time now, but recently I found ...
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Safari consuming a lot of juice on rMB 2016 with Mojave

I hope you're all doing good and staying safe. To make things short. I've upgraded to Mojave a month ago, since I couldn't push ElCap for longer. Until last month, my batt life was impeccable (I never ...
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0answers
66 views

Battery charge status decreases while plugged in charging [duplicate]

so I have a 2019 MacBook Pro 16" on Catalina 10.15.5. I recently got it back from the shop - upper case replacement for bad keyboard that included replacing the battery as part of the repair. ...
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0answers
48 views

2017 MacBook Pro starts with a question mark folder when there is less charge and when it wakes up from sleep

My 2017 MacBook Pro reboots with a question mark folder when the charge is below 50%. When I connect my charger, it starts normally. I also noticed when the Macbook goes to sleep and wakes up, it ...
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3answers
3k views

iPad plugged to charger turns off due to low battery

My iPad is connected to charger yet battery level decreases (not as fast as plugged off but still). Is it a fault that can be directed to Apple Support for warranty or normal behaviour? I though that ...
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0answers
15 views

MacBook Pro battery not charging error - long term fix [duplicate]

I have a 2018 MacBook Pro 13 inch (the one without the touchbar). Over the past weeks, I have twice faced the situation where the charger is plugged in but the battery is draning and I get a "...
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1answer
32 views

How long do I have before the battery status changes from service recommended to replace now?

I have an early-2015 MacBook Pro 13" whose battery status has changed from normal to 'service recommended' state. The cycle count is around 367 and the battery backup runs strong at around 4-5 ...
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1answer
40 views

MacBook losing charge while shut down

I have a Macbook Pro 13 2019 and a Macbook Pro 13 2020. 2019 one runs 10.14.6 Mojave. 2020 one runs latest 10.15 Catalina When I turn off the Macbook Pro 2020 with "shut down" on 100% and I ...
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1answer
20 views

Running Macbook with 7.3v battery & AC power adapter

MacBook Pro 2013 non retina device has a defective battery which outputs only 7.3 volts. The Macbook cannot run only on the battery - it requires the AC power adapter to be plugged in to power the ...
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0answers
14 views

Macbook charging but not really charging [duplicate]

My macbook's charging indicator light shows that it's charging (the light is orange) but it's not really charging because it's been always orange for the past 8 hours. At the moment, my battery is ...
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1answer
5k views

How to determine the cause of MacBook battery not charging?

I see that the question "why is my MacBook not charging?" gets asked a lot. The problem is, there are multiple reasons. Possible points of failure are: charger, cable, magsafe connector, DC ...
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0answers
52 views

Battery discharging while plugged in [duplicate]

I have a new 2019 MacBook Pro 16" on Catalina 10.15.5. I recently got it back from the shop - upper case replacement for bad keyboard that included replacing the battery as part of the repair. ...
3
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3answers
60 views

Should I replace my Macbook battery, charger, or both after 5+ years of use?

I own a 13" mid-2012 MacBook Pro, and have been using it for over 7 years. I have replaced the HDD with a larger SSD, and upped the RAM to 8GB last year to improve its declining performance. ...
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0answers
17 views

Odd OS X behavior when it goes to sleep - returned to Login, said it shut down bc of a problem

I have posted something like this before, I run a 2012 MBP with Catalina. The odd behavior is that if I close the lid the machine seems to shut down completely (even with the power connected) and ...
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0answers
21 views

Will getting a new battery fix my dead Macbook?

My Macbook (2017 - 12 inch) just died on me. The screen went black and it shut down without warning. I've tried all the suggestions on the Apple help website: tried different power cords, resetting ...
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0answers
9 views

MacBook Air 2020 (i5, 16GB, 512GB) uses a lot of battery while sleeping

Few days ago I received my new Macbook Air and I noticed that it just eats battery. But to have some numbers I charged it to 100% and then I closed the lid. After 6h20m I opened it and it had only 85% ...
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1answer
47 views

How do I convince Apple support that my iPad battery failed?

I have a 1st gen iPad Pro 12.9". It's 4.5 years old. A week ago it started repeatedly rebooting about two minutes after boot. When booted it shows battery at 3% or 4% but once showed it at 100% (...
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2answers
3k views

How to prevent screen lock when MacBook AC adapter is unplugged?

I use my MacBook connected to an external monitor via HDMI with the lid closed, and plugged in to AC power (in closed clamshell mode). If I disconnect the power cord (usually happens accidentally), ...
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12answers
49k 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, ...
16
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5answers
20k views

Charging an iPhone, difference between USB port and power outlet

The power outlet has more power obviously, but maybe the computer USB is suffice to charge it at maximum speed. Is there a difference between charging an iPhone using the computer USB port and using ...
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0answers
9 views

2011 Macbook Pro 15" keeps eating batteries

I have an ancient 2011 MBP that keeps destroying batteries. I had the logic board replaced in 2016 for the integrated graphics recall, FWIW. I just replaced the current batt with one from OWC (...
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0answers
15 views

OEM adapter will only charge if the battery is first disconnected from the logic board before it's plugged in

I'm trying to get to the bottom of this weird issue I seem to be having. I have a OEM charger that wouldn't seem be charge my Macbook pro 13 retina (late 2012), model a1425. I recently did a battery ...
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2answers
12k views

2017 Macbook Won't turn on - Displays battery icon

My wife's 2017 macbook won't turn on/charge. It just displays this battery icon, with the red bar of the battery flashing intermittently. It's currently plugged into the charger but this doesn't seem ...
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0answers
14 views

Macbook Pro 2013 15” Mojave stuck in boot loop

Macbook Pro 2013 15” Mojave stuck in boot loop A couple of days ago after trying to install Avast VPN, my Macbook Pro 2013 (15” Mojave) was giving warning messages it was low in memory so I closed ...
2
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1answer
306 views

Swollen battery for the past few days - MacBook Pro (Retina, 15-inch, Mid 2015)

I checked with Macbook Pro mid-2015 15" swollen battery and I am asking this question. My MacBook Pro (Retina, 15-inch, Mid 2015), details enclosed, is working perfectly. For the past two days I ...
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0answers
13 views

Macbook Pro Retina (mid-2014) shutdowns with -128 code

I have a Mid 2014 Macbook Pro, which was just serviced at Apple (battery replacement). While they were replacing the battery they cocked up the main board with CPU, RAM etc and replaced that for free. ...
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2answers
257 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 charging at 100% (although I unplug at night). It's rare that I let the phone run past 80% and even rare that it ...
27
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1answer
33k views

Using bash/terminal to get number of battery recharge cycles

I would like to get the number of recharge cycles using bash (terminal commands). I understand the following command will display all of the battery data, but I want the cycle count on its own ioreg -...
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1answer
44 views

MBP16 charging: After sleep mode no charging (but with charging icon), restart helps

I have strange charging behavior that started some time ago. My MBP16 (Catalina 10.15.5 (19F101)) just stopped charging until i do some actions. [!]ITS HAPPENING RANDOMLY, not all the times. AND EACH ...
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2answers
51 views

MacBook Pro will only charge if using a 3rd party adapter after battery replacement

I’m having a bit of a weird situation. After running a program that really seemed to overheat my computer, a few days after my charger stopped charging my 13” Late 2012 Retina MacBook Pro. It was ...
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2answers
217 views

macbook shuts down immediately after startup

My retina MacBook Pro, running 10.12.6, has an annoying habit. If I close the lid on 50% battery, the next time I open it, it wakes, I log in, and then a few seconds later the screen goes black and ...
2
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2answers
662 views

My AppleCare is about to expire with my battery at 81%. Is there a good way to get it to 79% so I can get a new battery?

AppleCare covers the replacement of a MacBook Pro battery if it drops below 80% capacity before 1000 cycles. I have until the end of the year and I'm at 81% and 300 cycles. It would be nice to get a ...
4
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6answers
21k views

Is it safe to turn the iPhone 4 off for over a week

I am going away on holiday for a week but don't want to take my phone with me because I'm afraid of running up a huge bill, is it safe to turn the phone off for this long? Or can it damage the battery?...

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