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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13 views

MacBook Pro (15-inch, Early 2011) 85W AXXX compatibility issue [duplicate]

Hi I have bought MacBook Pro (15-inch, Early 2011) recently and there was a problem with it. It was charging really slow. 8 hours of charging for full capacity charge. And then I found out the guy I ...
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2017 MacBook Pro Battery Not Charging [duplicate]

Having a problem with my recently purchased refurbished 2017 15" MacBook Pro. Yesterday it suddenly shut down and after rebooting, I noticed the battery was at 1% despite being plugged in. Now if it ...
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Macbook slows down when connected to external monitor and power supply

I have a Macbook Pro (Retina, Mid 2012) with the following configuration: 2.3 GHz Quad-Core Intel Core i7, 8 GB 1600 MHz DDR3, Intel HD Graphics 4000 1536 MB I use Dell P2419H as my external monitor ...
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Set of laptop models that support battery health management [duplicate]

I have updated my MacBook Pro (Retina, 15-inch, Mid 2015) to the latest Mac Os Catalina 10.15.5 (19F96) which should include battery health management feature. But I can't find it in my settings. I ...
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Laptop shutdown without low-battery warning?

Low battery shutdown is a popular topic: Macbook Pro 2012 shutsdown suddenly at 25% battery MacBook shut down at 20% battery with no warning? [duplicate] This is a 2012 MacBook Air which I replaced ...
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“Battery Health” in macOS Catalina 10.15.5?

I have just installed the macOS Catalina 10.15.5 update on my 11" Mid 2013 MacBook Air. The update is working fine. The MacBook Air specifications on the Wikipedia page says that this model has a ...
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Apple Diagnostic Result PFM006 and Kernel_Task taking upto 300 % of CPU and Depleted Battery

My Macbook Air (2018) Retina battery has depleted within 130 cycles. I was running Windows via Bootcamp in heavy load, letting it discharge fully and charge repeatedly. If I unplug from power source ...
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How to turn on MacBook air a1237 with a different laptop battery? [closed]

I want to power on my old MacBook air a1237 with a different source of power and I want to know the pinout in the logic board and the voltage needed.
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25 views

Macbook Pro 2015 waking from sleep every few seconds

My 2015 Macbook Pro loses charge rapidly while asleep (almost as fast as while it's awake and I'm using it). From looking around online, some people seem to have resolved this by resetting the PRAM - ...
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1answer
49 views

My iPhone SE only boots on quick charge

When I try to boot it it shows the Apple logo for a second and then gives up, same with Recovery mode. When I put it on quick charge it boots up and works but when I unplug it, it slows down and then ...
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Charging Earbuds Charging Case 5V DC (USB C) with 96W Apple Macbook Charger?

Today I connected my 96W Macbook Pro Charger to my Mpow M9 Wireless Earbuds Charging Case (purchased a week ago) which also has Type C charging port. Within few seconds of connecting, smoke started ...
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Apple Hardware Test, 4SNS/1/40000000: TB0T-129

I made an Hardware Test with may MacBook Pro 5,1(A1286) and got this Error code below: 4SNS/1/40000000: TB0T-129.000 This is a sensor error. Battery temperature sensor is not working. Macbook is not ...
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Battery status and replacement

About a week ago my battery status (MacBook Pro mid 2017) claimed that the battery should be replaced after 250 cycles. Now, all of a sudden the battery status has returned to normal. ioreg -l -w0 |...
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1answer
24 views

Does hot weather causes Lithium-ion batteries in Apple devices to drain fast?

I live in a tropical region which sees very hot summers, which we are experiencing currently. I have been observing for some time that the battery on my Apple devices are draining way quicker than ...
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Is 110 degrees fahrenheit on average bad on a 2019 MacBook Air? (And other problems) [duplicate]

I've been using my MacBook air 2019 for quite some time now (9 months) and I've been getting 110 degrees fahrenheit on average with simple use like google chrome or safari. In fact, the highest I have ...
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MacBook Air 13" Mid2013 94% battery drain overnight

Two days ago I noticed a strange battery drain so I decided to check for some solutions online. I used the sudo pmset -b tcpkeepalive 0 method and last night I charged my MacBook Air to 100% and then ...
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Does using apps while the iPhone X is plugged in run down the battery health?

My question is pretty similar to this from a few years ago: When plugged in, does the iPhone use the battery or the external source during heavy use? Basically, I was looking to use my iPhone X with ...
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iPhone 7 (13.4.1) Battery Drain Issue

I am facing severe battery drain issue with my iPhone 7 (13.4.1). Battery discharges almost 1%-2% per minute while using. Even though battery capacity shows 100% in Battery menu in Settings. ...
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384 views

Battery not charging at only 35 cycles - recoverable?

I bought a second-hand 12" MacBook and was disappointed to discover it doesn't charge. I'm expecting to return it, but I'm frustrated that I can't fix it. The battery is showing at 35 cycles but not ...
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2009 MacBook Pro 15” Replace battery now with 257 cycles?

I recently picked up a 2009 MacBook Pro 15”. El Capitan is telling me to replace the battery now. Although the battery is at 100 percent and only has 257 cycles on it. Is it really a battery issue for ...
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135 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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Can I use any 5 volt 2 ampere (that is, 10 W) charging adapter to charge my iPad 2018? [duplicate]

My iPad's charging adapter has malfunctioned. The lightning to USB cable is fine. My place is likely to be under a Covid19 lock down for at least two more weeks, so I cannot get a replacement soon. ...
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157 views

How can I see an iPhone Smart Battery Case serial number using macOS console?

My iPhone XS Max Smart Battery Case's serial number is extremely difficult to make out due to the color and wear on the fabric. How do I use macOS Console.app to connect to my iPhone to see what the ...
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High temperature and battery problems after update to Catalina

I wanted to do my friend a favour and updated her Macbook Air (2015) from El Capitan (10.11) to Catalina (10.15). She never bothered updating and despite having no apparent problems, I advised for the ...
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Why my Macbook Pro 13 2017 battery lasts just 4h?

I was expecting this MacBook Pro 13 (without Touch Bar) up to 10h of battery and I'm getting just 4h. Moreover, the screen is off since I'm using an external monitor.
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Can I make my Mac re-adjust to the original brightness when I plug my power cord back in?

When I unplug the power cord from my mac, the brightness dims to save power. When I plug the cord back in, it stays dim rather than going back to the original brightness level. Can I change it so that ...
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15 views

Avoid crashes when battery power runs out on a Macbook Pro

I recently upgraded from an MBP-2015 on Mojave to a new MBP 2020 with Catalina. On the former when running out of power, (many, many times,) the machine would go to hibernation. After powering back ...
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91 views

Macbook Pro 16 Inch Overheating

I just got my new macbook pro 16 inch yesterday, upgrading from a 2016 macbook. I am slightly worried at the battery life thus far. This morning for example, I have been browsing the web to check ...
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1answer
90 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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94% battery state after 8 cycles

Not so long time ago I've purchased an iPod (last gen), such a cute toy and a music player to take with me alongside the huge iPhone. Using Coconut battery I can track the state of battery and I do ...
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Macbook Pro 15” (touch id) displays battery icon

I sent my Macbook Pro 2018 to Apple because it stopped working. They themselves couldn’t figure out what was wrong with the computer, other that it was really dusty in the inside. Anyway, I paid ...
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After updating to latest iOS13.4 my iPhone XR gets shutdown even when the batter shows 20% [duplicate]

After updating to latest iOS13.4 my iPhone XR gets shutdown even when the batter shows 20%. Tried to browse more on this, it was explained that it is a firmware issue. Can anyone suggest how to ...
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38 views

MacBook Pro Mid-2012 starts but does not respond anymore

My gf has a severe issue with her MBP Mid-2012 (serial number is C1MK9X6ZDTY3; it is a MacBook Pro 13-Inch "Core i5" 2.5 Mid-2012). A few months ago I replaced the internal HD with an SSD. Everything ...
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1answer
62 views

macOS Catalina - External Hard Drive not sleeping when lid closed and laptop sleeping

So I'm trying to figure out why my external hard drive remains on (light displaying) when the laptop is sleeping. Details: macos 10.15.3 macbook pro energy saver disabled > Enable Power Nap while ...
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Mac keeps warning me about the battery problem on the top bar

My Mac (2017 12' MacBook) keeps me warning about the battery problem when I tap on the battery icon on the top bar. It showed battery repair (the exact English phrase might be different) with a ...
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1answer
38 views

Can a deteriorating battery cause screen flickering? [Early 2015 macbook pro retina]

I have a early 2015 macbook pro with a Retina display. I'm at about 950 charge cycles, and have had the "service battery" indicatory since last summer. I noticed that occasionally my screen does ...
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How to stop CorruptPowerlog eating up my disk space?

I am running 10.14.6 (18G3020) on a 2018 MacBook Air. Every 15 seconds or so a triplet of files is created in /private/var/db/powerlog/Library/BatteryLife/Quarantine. For example 30144 -rw-r--r-- 1 ...
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Is there any more technical information about the iPad/iPhone charge management feature?

According to Apple, a new "charge management" feature which reduces the maximum capacity of an iPhone or iPad device when it is plugged in for prolonged periods of time. This was quite interesting to ...
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23 views

Mid 2010 MacBook Battery Replacement Recommendations [closed]

I'm trying to revive my old Mid-2010 MacBook. It holds a charge, but I am experiencing hardware performance issues that I believe are directly related to the aging battery (hasn't been replaced since ...
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35 views

Force USB C MacBook to run off AC power

Is there a way to force a MacBook to stop charging the battery when it hasn't reached 100% and then run off of AC power? There was a way to do with with MagSafe 2 chargers.. What about USB C MacBooks? ...
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1answer
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Macbook Air 2013 won't boot up; Charging cable never turns green, always amber

I have a 2013 MacBook Air 13" (A1466), which all off a sudden wouldn't boot up. The charging LED on the cable was always green. I then attempted: Holding the power button down 10 secs SMC Reset ...
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1answer
41 views

Is keeping macbook battery 20%~80% good? [duplicate]

I heard that keeping macbook battery in 20% to 80% is good. Is it true? or what is the best way to use macbook best way?
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iPhone disconnecting and reconnecting from MacBook laptop [duplicate]

I am trying to charge my iPhone 7 from my MacBook. When I plug my iPhone 7 via the provided lightning USB cable into my MacBook Pro Mid-2015, it keeps vibrating incessantly while disconnecting and ...
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8 views

MacBook Pro 13-inch, Late 2013, shuts down as soon as it gets to lock screen

I've been using my macbook for a long time without disconnecting the charger and usually put on the sleep mode instead of shutting it down. One day randomly it shut down out of nowhere and wouldn't ...
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1answer
31 views

How difficult is it to manually replace an Early 2015 Macbook Pro's battery?

I have a MacBook Pro (Retina, 13-inch, Early 2015). My battery health has deteriorated, and I may replace the battery some time this year. A full charge still gets me about 3-4 hours of use time, and ...
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35 views

MacBook Pro 2015 won’t boot to Operating System. Constantly restarts at Apple logo screen

I have tried all the obvious commands at boot without success, including Safe Mode. Then booted into Single-User mode. Ran “fsck -fy” command. Shows 9 line item warnings: “time stamp is invalid. Is ...
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13 views

Ipad Air drained battery, won't start, reset and itunes reset don't work

I have an ipad air2, it has a totally blank screen. I have tried to recharge it in the wall socket for 2 hours. I have tried to hold the home/start button for 15 seconds 6 times in a row. When ...
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1answer
44 views

MBP Battery normal but won't charge, pro is now glitchy and slow

I've got a MacBook Pro (mid 2012 using Majave) which was bought reconditioned 2 years ago. It's been great, no issues. I updated a search engine app (Ecosia) while the battery was charging, once full ...
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74 views

Why is 2017 MacBook air battery life so much better than 2014 MacBook pro's?

Why is my girlfriend's 2017 MacBook air battery life so much better than my 2014 MacBook pro's (after just having brand new battery installed) when the batteries have the exact same device name (...
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1answer
26 views

Is it possible to remove the battery from MacBook Pro (A1502) and use in a different MacBook Pro?

My MacBook Pro battery is faulty, it never charges past 2%. As I'm unable to work I've purchased a new battery but it will take 4-5 days to arrive Could I remove the battery from my MacBook Pro (...

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