Questions tagged [battery]

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

109 questions with no upvoted or accepted answers
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7
votes
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626 views

AirPods battery level with `ioreg`

I can query the battery level of my bluetooth devices with ioreg with ioreg -r -l -n devicename | grep '"BatteryPercent"\ =' with the following devices Keyboards: IOAppleBluetoothHIDDriver, ...
6
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0answers
12k views

“QuickLookUIService” Using Significant Energy

After macOS High Sierra upgrade I noticed "QuickLookUIService" is always in "Using Significant Energy" list. Has anyone have same problem? And is there any suggestion about this? MacBook Pro (Retina, ...
5
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0answers
484 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 ...
5
votes
0answers
1k views

Disable battery warning for bluetooth keyboard and mouse

I would like to disable the extremely annoying notification popups when my bluetooth mouse or keyboards batteries are getting low. I have enough rechargeable batteries in my drawer, so I do not need a ...
4
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0answers
288 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 ...
4
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0answers
2k views

Macbook Pro Sleep Battery Drain

I have an Early 2011 Macbook Pro (13", basic spec) which since I got it (I only just stopped to think about it) has had a massive amount of sleep battery drain. When the laptop is on and in-use, its ...
3
votes
0answers
16 views

Replaced battery won't charge (macbook pro 2015 model)

My MBP battery got swollen and replaced it with the new one. Everything is connected properly, battery is detected but it doesn't hold the charge (laptop shuts down immediately after unplugging the ...
3
votes
0answers
119 views

iPhone 5 won't turn on after being off for two weeks

The iPhone was perfectly working. Then it was left home for two weeks. Battery obviously drained out. When I came back, I put the iPhone on the charger for a lot time. However, the iPhone and the ...
3
votes
0answers
339 views

Why a sudden increase in CPU when battery low?

My Macbook Pro (Retina 13" late 2013, OSX 10.10.5) has fine battery life overall - this is not the problem. However, when the battery drops below about 8%, and before I normally get any "your ...
2
votes
0answers
22 views

Automatically toggle iPhone Low Power Mode on set schedule

Is there a way built-in, using Shortcuts app or other to schedule toggling of Low Power Mode on an iPhone?
2
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0answers
32 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 ...
2
votes
0answers
137 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 ...
2
votes
0answers
291 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....
2
votes
0answers
43 views

My phone toggles between on and off charge only when plugged into my MacBook Air

Both my MacBook Air and the lightning cable are brand new. I've tried to clean the inside of the charging port of my iPhone 6s.
2
votes
0answers
2k views

Mid-2017 13" Touch Bar Macbook Pro Won't Turn On or Charge

I am trying to diagnose a 13" mid-2017 touch bar MacBook Pro (Model A1706 EMC 3163) that will not charge or turn on. This issue showed up a few days ago when the Apple-provided charger appeared to ...
2
votes
0answers
3k views

Siri is draining my battery since upgrading to iOS 11

A few weeks back I upgraded finally from iOS 10 to 11 (I got an Apple Watch so had no choice if I wanted to use it). Ever since then, my battery life has gone to crap on my iPhone SE. The worst ...
2
votes
0answers
306 views

Why does my iPhone keep crashing except on low power mode?

I have a one year old iPhone 5s. After about six months of use it started crashing and restarting. This often happens when launching an app, when I imagine power consumption may be at its highest. ...
2
votes
0answers
516 views

12" Macbook battery health at 88% even with only 53 Load Cycles. Is this normal?

I have a 2016 12" Macbook that's only a little over a year old (and therefore out of warranty) and I'm noticing in Coconutbattery that the battery is 88.5% of it's design capacity even with only 53 ...
2
votes
0answers
623 views

External display periodically enters power save mode when running on battery power

Normally I have my MacBook Pro connected to power when it is on its external display, but at the moment I'm using it without the adapter, with an external mouse, keyboard, and display (a Dell U2515H ...
2
votes
0answers
42 views

macbook pro battery looks fine , but computer won't work on it and its not charging?

My macbook battery is 94% charge , condition is normal and cycle count is 30 , it used to work fine a couple of days ago . now computer won't boot on if not connected to power and if I disconnect ...
2
votes
0answers
178 views

Chrome 59.0.3071.115 suddenly drains battery (approx 1% every 5min)

A month ago I noticed that my new macbook pro 2015 battery drains in a few hours (2-4). I started testing which app is suddenly consuming its battery and found out it was Chrome. When it is open (...
2
votes
0answers
35 views

2009 MBP goes to sleep 15 seconds after powering on and can't be woken up

So, what happens is after a turn on the macbook, it goes through the normal startup sequence, then shows a blue screen, and shows the desktop, just like normal. but then, after 15 seconds, the screen, ...
2
votes
0answers
137 views

Can you determine when the “Service Battery” warning came on for a MacBook?

I have a Macbook Pro 7,1 that may or may not have been damaged from water the other day. I noticed that the battery indicator now has the 'Service Battery' showing. I'm wondering if it's possible to ...
2
votes
0answers
203 views

How do you ascertain that the battery drain in an iPhone is software related

So, my iPhone 6 Plus battery has been draining very badly. Whereas I used to get over a day on a single 100% charge, I barely make it half a day now. Even the charging in takes whole night even on a ...
2
votes
0answers
527 views

Audio warning to warn you that your laptop's battery is low

I have two computers where I work back and forth, sometimes I'll launch a render on the MBP and go work on the iMac. But sometimes, I unplug the MBP, go do something else, and rendering uses up all ...
2
votes
0answers
812 views

How can I determine the battery impact of using scaled resolutions on my MB Pro Retina?

(My machine is a stock mid-2014 MB Pro Retina 13") I noticed a definitive drop in how long my battery lasts when I switched to the largest resolution available (to have more space to work with) ...
2
votes
0answers
164 views

App to allow battery charge only to a certain extent

I'd like to charge my rMBP battery only up to 85% or 90%, in order to preserve it. Is there any app that stops charging at user selected percentages? If not, is there any other method? (Apart from ...
2
votes
0answers
1k views

Macbook pro mid-2010 randomly turns off?

This has been happening for around 6 months and it has gotten worse. I thought it was the battery because it had close to 1500 cycles. But I recently replaced it and now the problem seems worse. The ...
2
votes
0answers
100 views

Why is my rMBP drawing twice as much power as my friend's when idle?

Mine is late 2012 and has 8GB RAM. His is late 2014 and has 16GB RAM. Both have an SSD (although of different size) and both are running Yosemite. We set the brightness to 6 pips each and turn off ...
2
votes
0answers
127 views

iOS: Default Battery Percentage Level for individual services to switch off

We all know iOS switches off services one by one when the battery reaches critical level. But is there any fixed battery level to cut down individual services. For example, Bluetooth will be switched ...
2
votes
0answers
614 views

How much will upgraded processor and RAM affect battery life?

I'm considering purchasing a new Macbook Air, and one of my main goals would be to maximize battery life. If I upgrade the standard processor (from 1.3GHz Dual-Core Intel Core i5 to 1.7GHz Dual-Core ...
2
votes
0answers
1k views

Fusion Drive Setup: Possible to force the HDD to spin down as long as your reading from/writing to the SSD?

I'm considering to replace my optical drive in my MacBook Pro with an SSD. When using it as separate Volume, the advantage is that you can spin down the HDD, thus reduce noise and first and foremost, ...
2
votes
0answers
390 views

Strange sleep mode of MacBook behaviour after water damage

Months ago I drowned my MacBooks keyboard in water and it died. I'm using an external keyboard now the Mac works as before. However, there is this interesting feature that if I just close the Mac (...
2
votes
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 ...
2
votes
1answer
4k views

Why is the usage and standby time always the same on my iPhone?

Why do the usage and standby times on my iPhone 7 Plus always show the same value? I have tried restarting my phone and I have let it drain until it turns itself off to see if that would fix the ...
2
votes
1answer
203 views

Chrome continues running even when Mac should be is asleep

I have the latest version of Chrome running on my Mac. I've noticed that even when I close the old intending to put my computer to sleep, Chrome continues running. I know this is the case because I ...
1
vote
0answers
41 views

Standard charger for Macbook Pro insufficient

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 ...
1
vote
0answers
20 views

Fully charged 2015 MacBook Air shuts down instantly when disconnected from power

My father is using an Early 2015 MacBook Air (i5 Dual-core, 128GB SSD, 4GB RAM). He's been using it without any problem since the day he bought it, until it started turning off instantly the minute he ...
1
vote
0answers
18 views

MacBook pro won't stay on and has difficulties powering up

MacBook pro 13" touchbar from 2016. The MacBook sometimes will turn on, most of the time it won't. When it does turn on, I can get as far as the login screen, where it will completely shut off after ...
1
vote
0answers
29 views

MacBook Pro 15 2017 and power banks

I travel a lot, so I came to the conclusion that a power bank made for charging laptops is a good solution when wall-plug is not an option. The question is how many full charges can I expect to have ...
1
vote
0answers
48 views

MacBook Air battery discharges overnight (April 2018)

My MacBook Air's battery sometimes discharges overnight. Not always, perhaps just 60% of the time. It is always on sleep (I just close the lid) and it is usually for 8-9 hours. I unplug it, close the ...
1
vote
0answers
23 views

2015 Macbook Won't Turn On - Shows no sign of life

I recently bought a 2015 Macbook from a friend, and after only a day of use, it won't turn on... I shut down the Macbook with around 15% charge left on it, so initially I thought this to be a lack-of-...
1
vote
0answers
444 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 ...
1
vote
0answers
184 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, ...
1
vote
0answers
300 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 ...
1
vote
0answers
274 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. ...
1
vote
0answers
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 ...
1
vote
0answers
153 views

Battery capacity drastically reduced after Update to macOS Mojave (10.14)

I check my battery with coconutBattery frequently and was shocked when I found out that the maximum capacity went from 95% (Date: 18.09.2018) to 90% (Date: 24.10.2018) within a month. Is this a normal ...
1
vote
0answers
37 views

Battery life of a new-ish battery seems quite low

I have bought a used MacBook Pro from 2011 with a Core i5 (2.3 GHz) and 8 GB RAM. According to the previous owner the battery has been replaced late 2017 and according to macOS it only has as much as ...
1
vote
0answers
251 views

Battery drain during sleep (MacBook Air) - weird “powerd” processes?

My MacBook Air 13-inch (Early 2015) loses about 30% battery every night - last night went from 99% at midnight to 73% at 9:00AM without ever being opened. PowerNap is off. Looking at /var/logs/...