Questions tagged [battery]

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

129 questions with no upvoted or accepted answers
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8
votes
0answers
789 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
591 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 ...
6
votes
0answers
13k 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
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
323 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
36 views

My iPhone 7 Plus died after being exposed to cold weather and a bit of rain. Will I be able to retrieve my data?

My iPhone 7 Plus won't respond to a hard reset. I'm not able to switch it on either. The phone detects the Home button being pressed only sometimes. I haven't backed up my data in a long time and ...
3
votes
0answers
21 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
135 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
362 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
1answer
32 views

Can an iPad Pro Charge a MacBook Pro?

I have a 2018 iPad Pro and a recent MacBook Pro (with USB C). Is there any way I can control what charges what when I connect the two? If I connect the two with a USB-C charger, my MacBook ...
2
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0answers
37 views

Macbook 2015 with normal battery won't charge even after SMC

My MacBook won't charge. Here are the things I have done so far: I tested the MagSafe charger to another laptop to make sure it is not faulty ( MagSafe is working ) I did the SMC reset ( shift + alt +...
2
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0answers
27 views

Is there any list or reference for maximum fast charging values/wattages of Apple devices?

From what I understand, many of Apple’s iOS (and iPad OS) capable devices are capable of fast charging since the iPhone 6 (6s?) was released. And nowadays, all MacBooks (MacBook, MacBook Pro and ...
2
votes
0answers
22 views

Check system logs for “Service Battery” entry

I would like to find evidence of when the "Service Battery" warning has been activated. I knoow the console.app exists, but I'm not sure how to query it for what I am looking for. Why I want to do ...
2
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0answers
37 views

Fluctuating battery capacity in coconutBattery

I am a new MacBook user. I have a problem with my battery. When I tried to see its stats from coconutBattery, sometimes it said 6200/6667(93%) and sometimes it said 6560/6667(97%) to be the full ...
2
votes
0answers
23 views

Battery status in menu bar is not changing though It is charging?

My Mac book pro 2015 is charging however the battery status is not changing. But when I toggle the button "Show battery status in menu bar" in Energy Saver it shows the correct battery percentage. So ...
2
votes
0answers
112 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
votes
0answers
37 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
144 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
408 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
48 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
342 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
604 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
654 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
184 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
142 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
205 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
606 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
834 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
166 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
128 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
617 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
395 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
2k 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
204 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
48 views

Catalina Notes.app draining battery?

After upgrading to Catalina, I noticed that my MacBook Pro (13" with touchbar) would go from 100% battery to nearly zero in just about 30 minutes. The fans would be running like crazy. Using Activity ...
1
vote
0answers
15 views

How to prevent Macbook Air from going to sleep after disconnecting power cord?

I have an annoying issue with my MacBook Air (13-inch, Early 2014 on macOS High Sierra Version 10.13.6): A few minutes after disconnecting the power cord from my fully charged laptop, it goes to sleep....
1
vote
0answers
17 views

What should I expect about the battery for a new macbook pro

I bought a new 2019 MacBook Pro, 2.4 GHz Intel Core i5. I feel like the battery is not as described. I tried with open only one Youtube video on chrome, set the brightness to 75%,and the battery ...
1
vote
0answers
14 views

kernel: (AppleSMC) Previous shutdown cause: -6

I have a MacBook pro retina 13-inch, early 2015. A couple of months ago I got the "service battery notification", now my MacBook is turning off randomly, sometimes repeatedly in a short period of ...
1
vote
0answers
21 views

Minimum Charging requirements for an iPhone

I am making a thermoelectric charger, which uses heat to charge a phone (with a Peltier module) I use a 0.9v - 5v DC-DC booster and it can charge a Samsung. But when I plug it into an iPhone, it ...
1
vote
0answers
19 views

How to keep 2017 Macbook Pro / Mojave from slowing down when not on A/C power?

All of the guides that I have found are out of date. My model identifier is "MacBookPro14,3". One such example of "slowing down" is that when the MacBook Pro am plugged in, the application iTerm, is ...
1
vote
0answers
13 views

Mouse battery warning percentage

I use High Sierra on a MacBook Pro with a Magic Mouse. I rotate among three pairs of rechargeable batteries. Today I got the warning about low mouse battery charge when the charge was at 9%. But the ...