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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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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20 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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328 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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814 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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30 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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39 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
275 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
50 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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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
67 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
39 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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150 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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399 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
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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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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
83 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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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
502 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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88 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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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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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
83 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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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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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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73 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
109 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
58 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
347 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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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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298 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 ...
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139 views

Macbook not charging after depleting battery

OK, this is a bit of a weird one. My wife, thinking someone damaged her Macbook's cable, unplugged it. She then ran the Macbook until it shut down by itself. When I got home, I tested the cable and ...
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1answer
1k views

iPhone 7 won't charge consistently from MacBookAir 2015

I've had my MacBook 11' 2015 Air since July 2016 and my iPhone 7 since April 2017, and my phone never had any issues charging on my Mac. I'm not sure when it started, but at some point both USB ports ...
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20 views

Is quitting apps bad for my iPhone battery? [duplicate]

Last night at dinner one of my Android using friends was bragging about how their Samsung phone had an option to tap one button to quickly shut down all your apps. My other friend (an iPhone user like ...
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1answer
108 views

MacBook Pro keyboard replacement: Refurbished or new components? [duplicate]

I'm about to send my 2016 MacBook Pro for a top case replacement due to a failing keyboard. Since the battery will also be replaced as a part of the top case, I'm wondering if Apple installs a ...
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3answers
1k views

What are dos and don'ts when charging an iPhone / Apple device? Can I charge the phone all day long?

I usually charge my phone all day and night long. All day long, because at work I connect my phone with my laptop, and all night long because when I go sleep, the phone will be charged overnight too. ...
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508 views

MBpro - Battery drain in sleep mode - Wake Reason : EC.USBC(Maintenance)

So I have a MacbookPro 2018 from septembre and a week ago, I noticed that my battery computer drain really fast in sleep mode. So I tried a lot of things like setting hibernatemode in 25 and other ...
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30 views

Macbook Pro SMC reset

I have a macbook pro 15" late 2013, I removed my dead battery and I am waiting for a new one from ifixt. Do I need to reset the SMC before installing the newer battery or should I wait till I fully ...
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1answer
180 views

[solved]Macbook pro MGXA2 draining battery on SHUTDOWN

I have a macbook pro 15" late 2014, I've got a problem: battery draining when shutdown (not sleep). 2018-11-17 12:47:31 +0700 Wake DarkWake to FullWake from Normal Sleep [CDNVA] due to UserActivity ...
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2answers
1k views

Macbook Pro Early 2015 13 inch Retina Cycle count reset

Apparently, the max cycle count for my MacBook (type is on the title) is 1000. Currently, my cycle count is 990 and I'm wondering if I can reset it without changing my battery? Probably impossible but ...
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1answer
275 views

Macbook pro “13” mid 2010 battery not holding charge. [duplicate]

Macbook pro “13” mid 2010 shutdown after removing the megasafe charger. . . Any help will be appriciated.
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1answer
3k views

Why is my MacBook Pro showing the low battery screen while at 100%?

Yesterday my MacBook shut down, a few seconds after I turned it on, and showed this screen when I wanted to turn it on again: When I plugged in my Mac, the battery level was at 100%! The same ...
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0answers
334 views

Login screen shows wrong battery percentage

My 2018 Macbook Pro 13 login screen shows 96% and shows no charging indicator even though the power is connected. When I log in it shows 100% and the charging/power indicator. I am running Mojave 10....
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1answer
772 views

Macbook Pro Mid-2014 trackpad not working

My mid 2014 13" macbook pro (retina) has been acting really weird. Two days ago, after I powered it up, the mouse started going crazy, moving all over the place, and eventually stopped moving, and ...
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1answer
853 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 ...
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2answers
1k views

SMC reset to fix battery not working, but cant be sure SMC reset has taken place

I have had a new battery in my mid 2012 15" macbook pro running 10.11.6 The battery health as monitored through a battery health app downloaded from the mac app store has been deteriorating ever ...
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2answers
2k views

What is the life expectancy of a Magic Mouse 2 battery?

I would like to know what is the battery life cycle of a Magic Mouse 2. Or the approximate number of charge/recharge cycles before its battery's performances will start to reduce visibly?
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1answer
534 views

External monitor connected via usb-c causes mac to not show low battery notification

I have a macbook pro 15 inch (2017) that I connect to a 32" external monitor via usb-c. Usb-c is also 'partially' charging the mac but not enough to fully charge battery since voltage from monitor to ...
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1answer
456 views

Macbook pro 13" mid-2012 not turning on, no battery leds (battery ok)

My MacBook pro 13" 2012 won't boot up. The battery leds on the outside aren't indicating anything either and the charger won't show bright green or amber led. Is my logic board the cause? Things I'...