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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162 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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2k 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 ...
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32 views

Can I add a jumper from charger to battery in a MacBook pro 2012 that is not charging?

The proposed solution to a non charging MacBook. Will this work? Add a jumper from charger to battery, this is to bypass current sensing circuitry and SMC. All, or some of which may be the root cause ...
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72 views

Macbook Pro (mid-2012) battery not identified (shows X) after SSD install

I recently upgraded my MacBook Pro (mid-2012) HDD to SSD. Once SSD install was complete, my macbook did not start, however when plugged into power, it started booting, and worked normally. The ...
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137 views

How to throttle CPU on a Mac? [duplicate]

How to throttle CPU on a Mac? I want to throttle CPU so that I can extend the battery life on a single charge. Device: MBP 2015. Running Majove.
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1answer
2k views

How should I interpret the full charge capacity (mAh) for a macbook battery?

in System Information it shows: "Full Charge Capacity (mAh): 7860". How should I interpret this figure?
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39 views

Can the amount of power Pandora uses be reduced?

My iPhone 8 is about a year old. I've run this test several times on it, recently, and months ago. I'm getting the same results I got on my old iPhone 6s. In my testing, I've used Apple Music, ...
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260 views

MacBook Pro USB disabled and dead battery. What to do?

I was constantly getting a notification that USB ports had been disabled due to an accessory using too much power. Most of the time there was nothing plugged in when I received the notification. So, ...
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2answers
180 views

iPhone suddenly drains battery quickly, but only sometimes

My iPhone 7 normally lasts about a week, but sometimes it suddenly starts draining very quickly. I have Background App Refresh completely turned off, and I wasn't using the phone at all when the ...
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25 views

MacBook Air battery not charging - very strange issues [duplicate]

I have been repairing a water-damaged MacBook Air 2015. Initially the machine would only boot with the battery disconnected and power connected, but then die after around 20 minutes. The MagSafe light ...
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95 views

Macbook Air 11" 2015 model A1465 not charging [duplicate]

I installed a new SSD, formatted it, and Mojave OS was installing when suddenly, the battery stopped charging. All I get now is a picture of a red battery with a low charge. If I remove the adapter, ...
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21 views

MacBook Pro Keys CVBNM don't work after battery replacement [duplicate]

I recently replaced the Battery of my Mac Book using this guide: iFixit Battery Replacement Guide The new battery is working great, but after a short time, the Space Bar suddenly got kinda stuck. (...
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45 views

brand new iPhone XS seems to run out of juice quite quickly - when should I charge it? [closed]

I've been using a company iPhone for quite some time now, and I found it to be much better than my Android personal phone, so I decided to buy a 256 Gb iPhone XS. I like it much better than my Samsung,...
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438 views

MacBook Pro 2018 ventilation slots blocked

I bought my MacBook Pro in October 2018. Now, on both the left and the right side of the machine's backside (the bottom) both the ventilation slots show some kind of foil coming out. The foil is ...
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1answer
35 views

Can a MacBook Pro 13 (Mid-2010) battery be used in a 2009 unibody polycarbonate MacBook?

I have one somewhere, I just don't have it on me. I'm just curious because my MacBook Pro died but has a new battery, and my 2009 MacBook has a dead battery. I'd rather not buy a new one if I don't ...
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35 views

Does iPad still use its battery when it is connected and fully charged?

I use my iPad on my desk with a stand everyday and it is connected to usb cable, which also charges iPad. It usually stays at 100% charge since my cable is connected. In this case...does my iPad ...
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34 views

Entering Sleep state due to 'Low Power Sleep': Using AC (Charge:53%) 46 secs [duplicate]

This question is def. not a duplicate of the ones linked. "Your Battery is Dead", I'm afraid, is not the solution. Edit: The event did not happen with AC plugged in, it happened on battery. I then ...
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1answer
43 views

MacBook Pro not loading although power adapter is connected

I own a new MacBook Pro (bought three weeks ago). Since I don't want to exhaust the 1000 expected full charge cycles this battery is rated at, I connect the MacBook with the power adapter when I'm ...
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1answer
4k views

Care and feeding of the 1st gen Apple Pencil and its battery

Background I own an iPad Pro 10.5" and a first-generation Apple Pencil for it. The Pencil was bought in March 2018. In January 2019, i.e. about 9.5 months later, it had a battery failure and had to ...
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17 views

Suspend a program when on battery power [duplicate]

I’m doing some long-running, CPU-intensive work. This means that I am tethered to a power outlet at all times. What I’d like to do is ask macOS to suspend a particular program when I’m on battery ...
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23 views

MacBook won't turn on without a charger even if the battery is fully charged [duplicate]

I started noticing that my MacBook Pro Mid 2014 won't turn on without the charger plugged in, I think this is randomly happening. Here is a screenshot from Battery Health app. If the charger is not ...
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414 views

What is this “Screen Shot” app using so much battery?

The battery on my MacBook Pro drains very quickly compared to what other people report. When I'm running Slack, lots of Chrome tabs, and Docker for Mac and everything, that's to be expected. ...
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1answer
891 views

My Macbook Air Battery Is not Charging and the Icon Shows Charging

My MacBook Air does not charge sometimes. It shows a different battery icon and the battery does not charge. Previously I used to get rid of this by opening battery settings, upon opening the battery ...
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32 views

What is the best charging strategy for a macbook? [duplicate]

I heard several strategy about macbook power supply connection: keeping alway at least 50% of battery level let unplugged until reaching the 10% warning perform once a month a full discharge What is ...
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41 views

Weird behavior when charging iPhone on MacBook [duplicate]

When I connect my iPhone to my MacBook to charge it, a sound is played on the iPhone, the green battery symbol appears instead of the clock, the small battery symbol the upper right corner turns green ...
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1answer
306 views

Does an iPhone battery drain faster in cold?

I have an iPhone SE and I have noticed the battery drainage is quicker when outside and in the winter. I have heard some websites and people say that batteries drain faster in cold. Is this true? I ...
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1answer
61 views

MacBook Pro 13'' 2017 (A1708) after year of use showing 50% capacity [duplicate]

I'am really shocked. Coconut battery shows 55.8% from Full Charge Capacity and battery is jumping in charge (like 90% after 5 minutes 50%). And some time ago was "Service Battery" label, but after ...
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2answers
2k views

New MacBook Pro has a battery cycle count of 2

I bought a new 2017 MacBook Pro without the Touch Bar. I found that it had 2 charge cycles. Is this normal for a new MacBook Pro or it is used?
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171 views

IOS Battery cycle measurement

An iPad model 1475 battery has failed after 3+ years of vigorous use as a TV screen. It was replaced through Apple for $100. How can I (practically) measure the battery's ability to charge? Is ...
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1answer
74 views

Is it possible to use Ethernet connection on Mac without battery draining?

I'm using a Macbook Pro 15" 2018 model. I want to use wired Internet connection with it. I've tried using 2 different USB-C hubs to accomplish this, both are USB-C to Ethernet plus some USB-A 3.0 ...
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1answer
42 views

Macbook mid-2010: no power after ssd upgrade

I changed my HDD to a SSD using ifixit guide on my MacBook Unibody Model A1342 (mid-2010). But after reconnecting the battery, the Mac seems to be dead (MagSafe light off, no chime, no fan, nothing)....
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1answer
176 views

Battery draining quickly in iPhone [duplicate]

I have an iPhone SE running iOS 12 and the battery is running out quickly, How can I found out what is draining the battery and how can it be prevented?
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424 views

Why does MacBook Pro battery discharge when not in use?

I generally keep my 2018 MacBook Pro plugged in and I use it casually when not plugged in throughout the day. With light email checking in Safari throughout the day, I have gone from 35% to 13% today....
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1answer
104 views

SMC sensors failure while running on battery

I have problem with SMC in MacBook Air 2016. While running on battery, data from SMC module freezes. In iStat Menus temperatures from sensors, RPMs, current meters and voltage meters from CPU aren't ...
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0answers
18 views

Is depleting batteries of MacBook Pro 2018 still a thing in 2018? [duplicate]

I was looking for battery related applications in Brew and found Battery Guardian which refers to an Apple page from 2011 as justification why this application matters. Referring an old page as ...
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1answer
99 views

MacBook Pro's battery charging only to 27% [duplicate]

I have a 2017 15" MacBook Pro. A while ago I posted question related to issues with battery here: MacBook 15" (2017) - Battery Charging Problem What's funny is that that problem solved itself ...
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2answers
1k views

13" MacBook Pro 2017 randomly shutting down

I bought a new Mac and have had it it for like 1 week now. I noticed it turns itself off at 8% but I wasn't worried. Then it started shutting down on like 17%-20% cca. When you plug charging cable ...
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1answer
532 views

Is it advisable to calibrate the battery on a iPhone?

I want to ask the same question as here: Is it advisable to calibrate the battery on a MacBook? but for iPhone. Should I calibrate iPhone's battery? For example with make it completely empty and full ...
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2answers
97 views

Problems charging older iPad

The iPad was bought 5 years ago, it runs iOS 9.3.5 and claims to be up to date. The battery is fine - it does hold the charge, and it does charge fast (when it decides to charge). The cable is also ...
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2answers
3k views

Where can I find original MacBook Pro batteries?

I have a 2011 13" MacBook Pro. I have replaced the battery once, replaced the charger two times (because it wore off/tore up). I have replaced the original drive with an SSD and pumped up the RAM so ...
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5answers
8k views

Can I charge a 2017 MacBook Pro with a third-party USB C power adaptor?

I've got a 2017 MacBook Pro which comes stock with an 87W USB C Power Adapter. I want to purchase an additional power adapter, but I don't require an official Apple one. I notice that Anker make one ...
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2answers
94 views

iPhone turning off on low battery

My iPhone SE on iOS 12 has been acting strange recently. Yesterday, it turned off at around 10% and when I tried to turn it on it said that it has no power. Two minutes later, it turned on and said ...
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1answer
1k views

MacBook 15" (2017) - Battery Charging Problem

Since yesterday my MacBook charges really slow, so I gave coconutBattery a try, and it showed that my MacBook is only charging with around 14 Watts. I am charging with an Apple 86W Power Supply. So ...
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1answer
67 views

What is the most accurate method of testing batteries for A1278 MacBook Pro?

I have about 20 batteries I want to test. I'm trying to find out if they will read "replace" or "service" in the OS. Usually, I'll stick the battery in long enough to collect a cycle count and ...
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2answers
75 views

Is it time for a new battery?

I have an iPhone SE, for just over a year. My battery health which I find in settings is decreasing quite rapidly. Right now it is at 94%: Recently it has been going down around 1% a month. After ...
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2answers
111 views

Macbook battery [duplicate]

I have a macbook pro 2010 15 inch A1286. My problem is that the power adapter is plugged into the MacBook but it indicates that the battery is not charging and "Power Source: Power Adapter". The ...
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1answer
59 views

My MacBook isn't charged since 2016, can I still charge now?

I have a MacBook that requires a MagSafe charger, but my charger broke in mid 2016. My MacBook was holding 40%+ charge and no longer being charged. I am wondering if I can still charge it today? If ...
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1answer
366 views

"No bootable device…” after unplanned empty battery shutdown

The MacBook Pro has suddenly shutdown (battery went out) while I am doing Boot Camp to Windows besides macOS. Now there's a big black and white message "No bootable device..." I can't do anything, I ...
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1answer
2k views

Battery Not Charging, remains at 0% [duplicate]

I have an Early 2015 MacBook Pro Retina, which I hard-restarted earlier (holding the power button) due to a software crash. It turned off just fine but refused to turn back on again (no backlight, no ...
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0answers
309 views

MacBook Air 2018 vs. MacBook Pro: What is the battery life at equal brightness in nits?

The MacBook Air 2018 is advertised as 12 hours battery life, the MacBook Pro as 10 hours. This official Apple testing is done using 3/4 brightness setting. Since the maximum brightness of both models ...