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Questions tagged [power]

The electricity drained by a device

2
votes
2answers
24 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 ...
2
votes
1answer
33 views

Will a Dell U2419HC provide enough power to charge a MBP 15" (Late 2016)?

The monitor comes with a USB-C port that sends power as well as image. But it's unclear to me: What's the wattage it sends? Is that enough to charge an MBP that's in use?
0
votes
0answers
17 views

Use internal graphic card with external display

There is a way to use internal graphic card while i have a external display plugged in using a macbook pro 2017? i'm a power saver user and use the radeon pro when i connect an external display only ...
1
vote
1answer
21 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 ...
3
votes
0answers
31 views

Magsafe problem: only works in certain positions

I recently bought a brand-new, genuine Magsafe 60W charger for my mid-2010 MBP (my previous charger died suddenly after months of extreme fraying). Within a few hours of using it, strange and bad ...
0
votes
1answer
24 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.
1
vote
1answer
33 views

iMac won’t power on. 24hrs later it did, but now dead again!

I updated my nov 2016 iMac to Mojave last week & everything ran super slow. Then I bumped the power cable out and it wouldn’t restart, no matter what I tried. 24 hrs later I tried again & it ...
2
votes
1answer
36 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 ...
0
votes
0answers
52 views

MacBook Pro 13" Early 2015 - Won't display anything after the Mojave update

My MacBook Pro 13" Early 2015 won't display anything after the 10.14 (Mojave) update. Here are the symptoms of the macbook: It turns on, there is a chime after clicking the Power button The screen ...
5
votes
1answer
31 views

Magsafe port coating worn away

The plastic coating of my (mid 2010, 13 inch) Macbook Pro's Magsafe charging port has almost completely worn away over time, exposing some kind of shiny metal surface beneath. How important is this ...
2
votes
0answers
22 views

How much power can be drawn from Apple Lightning port for a device? [duplicate]

I need some help and would love to find a developer to help me figure out how much power can be drawn from the Lightning port for a powered device ... similar to a fan or a camera connected to the ...
1
vote
1answer
53 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'...
0
votes
0answers
17 views

Why won't my iMac hibernate?

I recently configured my late 2012 iMac running Sierra to hibernate after 30 minutes of sleep: Currently in use: standby 1 Sleep On Power Button 1 womp 1 halfdim ...
3
votes
0answers
25 views

Macbook Air doesn't turn on [duplicate]

I have a 2017 Macbook Air 2017. A week ago I turned it on and wrote my password, then it shut down. I tried to turn on but nothing happened. I read some posts on the Internet and tried the following: ...
0
votes
0answers
116 views

iPad not turning on while charging

My iPad mini has an empty battery and while it's charging it's not turning on. I tried rebooting, holding the home button and power button, but it's still not opening. What should I do?
1
vote
0answers
33 views

MBP 2015 Sierra strange behaviour while hibernating

I noticed that my MBP early 2015 with Sierra OS X drained a battery quite a lot overnight. I did some research and my pmset settings are like this: Here is a screenshot of pmset -g log | grep ...
2
votes
1answer
22 views

Can I use a DC 60W 18v 3A solar pannel to power my macbook pro 15" retina mid-2012?

I have found this solar pannel ( https://fr.aliexpress.com/item/Suaoki-60-w-Panneau-Solaire-5-v-USB-et-18-v-DC-Sortie-Portable-Pliable-Puissance/32935273533.html?spm=a2g0w.search0104.8.83....
2
votes
0answers
108 views

Can't hibernate computer MacOS High Sierra, no pmset “standby” option

I have a Mid-2009 Macbook Pro 17 inch (5,2), with MacOS High Sierra 10.13.6 installed. I want to enable hibernation (or standby, or deep sleep, or safe sleep) in order to power off the RAM when in ...
2
votes
0answers
255 views

iPad Pro Won't Turn On

iPad Pro was fully charged. Upon going to bed I set alarms as usual. No alarm in morning and iPad will not turn on. When I try to recharge the back gets quite warm. I tried restarting by pushing both ...
0
votes
1answer
21 views

What are the electrical requirements for magsafe charging?

I'm supplying power to a MacBook Pro via a magsafe cable from a broken 60 W power supply. Is it safe (1) to omit the initial high impedance 6 V or 3 V and simply apply "14,5V to 18,5V on Magsafe 1 ...
4
votes
0answers
137 views

Keep low power mode on all the time

I would like Low Power Mode to be the default state of my device. When I get to 80% battery it toggles itself off automatically. How can I stop it turning itself off? How can I keep my phone always ...
1
vote
1answer
27 views

Burned magsafe dc in board ports: Replace, even if working?

I have noticed that two of the pin plugs on my magsafe dc in board, the ones, which are for power are blacked. As far as I know, this is due to moisture. Right now everything is working fine, however ...
2
votes
3answers
625 views

How safe is it to replace the magsafe 2 connector with another one by simply connecting the wires?

I have a problem with my magsafe 2 adaptor, it has been stopping to work occasionally for a while now. Until now I always managed to get it to work by yanking the cable (in order to unstuck the pins), ...
1
vote
1answer
158 views

What would happen if I plug in two USB-C power supplies into the same Mac? Would it charge faster? [duplicate]

I have a bunch of USB-C power supplies (some at different wattages). Would my Mac charge faster (or blow up) if I plug two power supplies into the same computer (different USB-C slots)
0
votes
2answers
71 views

Does it look like a Fake iPhone 6 or original? Specially The accessories. I'm confused with power adapter (rounded Pin)

Does it look like a Fake iPhone 6 or original? Specially The accessories. I'm confused with power adapter (rounded Pin). I have only this two images. Thanks I just needed info on the USB charging ...
1
vote
0answers
113 views

MacBook Pro A1278 keyboard works but power button doesn't

I have a MacBook Pro (mid 2012) A1278. All the keys work except the power button. I've tried different keyboards (i.e., plugging in internal keyboards to test the power button). None of the keyboards ...
1
vote
1answer
34 views

Mac runs as long as plugged in, but unpredictably shuts off otherwise - clock resets

I have a MacBook Pro, as shown in the image below. Also, as I think it might use a lot of power, I run Ubuntu on a vagrant machine to test website apps. Recently (last 2-3 months), the battery would ...
0
votes
0answers
12 views

Macbook Pro not powering on

I was given a MacBook Pro Mid 2009 which does not seems to power on. Here is the issue in details. The Mac seems to charge and I left it overnight charging the battery and the meter shows it as full. ...
3
votes
1answer
53 views

My MacBook Pro touch bar 13" isn't starting

My MacBook Pro touch bar 13" isn't starting and here's what I'm seeing: 1) No power - I can't hear blowers or any sound or see any activity on the backlight when I press the power button/touch ID 2) ...
2
votes
1answer
64 views

Power consumption of iMac

All other things being equal, what is the difference in power consumption of iMac with 8GB of RAM and iMac with 16 GB RAM?
2
votes
2answers
61 views

How to backup SSD if MacBook doesn't turn on?

I have a MacBook Pro 15" Mid 2015 and after 3 years of using it, I think it is broken since it won't power on. I already tried resetting SMC and NVRAM but it's still not working. I don't hear any ...
2
votes
1answer
291 views

USB-C Power Injector

I was wondering if a device exists for this yet: I have a normal screen that currently as an AUKEY HDMI to USB-C running from it to my 2017 MacBook Pro. It works well. I charge the laptop with the ...
0
votes
1answer
194 views

Does IFTTT app drain battery faster in iPhone (and Apple Watch)?

The IFTTT app sounds interesting with endless possibilities. I have just installed it but skeptical about using it because of the possibility of battery drain. The app has to keep track of every event ...
1
vote
1answer
4k views

What is the maximum wattage an iPhone X will support for wireless charging?

The existing chargers on the market are all either 5W or 7.5W for their charging capacity. While higher capacity chargers dont exist on the market, what is the theoretical maximum that an iPhone X ...
2
votes
0answers
18 views

MacBook early 2009 power issue?

I have been on here quite a lot with all my issues. I have a project MacBook (early 2009, a1181, which is running OSX High sierra and Ubuntu along with a bootloader, refit or fEFInd, can't remember at ...
2
votes
1answer
32 views

Is it safe to use 2 Power sources into a MacBook Pro 2016 15"

I have a 4k monitor that has power over usb-c but it is only supplying 15W instead of what it advertised of 60W. So I was wondering if I could charge my Mac with its 87W power supply while having the ...
2
votes
2answers
1k views

MacBook Air won't power on

My MacBook Air won't turn on. I plugged in the charger and it says it's charging. When I turn it on, the light instantly turns green for a few seconds, and then it goes to amber. What's going on? I ...
1
vote
1answer
689 views

iMac with a dead internal drive being used as a second monitor - booting and power efficiency

I have an old 2012 iMac12,2 which had a fatal hard drive crash in early 2018 and has been running via booting from an external hard drive. I have connected the 2012 Model to a new 2017 iMac18,3 via a ...
2
votes
2answers
679 views

Macbook Pro Battery 0% and wrong date

Model: MacBook Pro Retina, 13-inch, Early 2015 While I was working, I didn't realize that the battery was low and as a result, my MacBook Pro shut down when the battery had no power. So, then I ...
1
vote
1answer
81 views

On iPhone 5s, can the battery itself be the cause of fast draining, even after a brand new U2 chip is installed?

My battery was draining very fast even when UNUSED and in LOW POWER MODE. This was happening even in AIRPLANE mode (i.e. overnight, unused, in Airplane and Low Power Modes both enabled). I got the ...
3
votes
1answer
60 views

Change what percentage/time remaining causes the battery icon on Mac to go red

I'm dead broke. So, I have a cheap battery for my dead-broke-esque 2008 MacBook. It only lasts about 2 hours on a full charge. However, it's a little goofy at times. Not in a dangerous way, just that ...
7
votes
1answer
499 views

Are Macbook Pros with a rusted / corroded MagSafe port safe to operate?

So I have MacBook Pro 13" 2015 and when I connect the MagSafe power connector to it, it seems like it’s more difficult to charge. So I check the MagSafe port and want to clean it I think. When I ...
1
vote
0answers
174 views

My iMac automatically/mysteriously powers off when on standby. How can I make it not power off?

Our iMac randomly powers off while on standby. I put it to sleep, come back, and it is powered off. I need to reboot it, which is a long process. The iMac is at the newest operating system and it is ...
2
votes
0answers
25 views

iPhone not recognized by MacBook 12"

I want to connect an iPhone 6 to my 2016 12" MacBook. I have a USB-C to USB-A adapter. If I connect the iPhone, macOS shows a warning (translated): USB device requires power (Note: It just says power,...
2
votes
1answer
562 views

Do I need a voltage converter for Japan, for MacBooks or USB devices?

Japan uses 100V; I will be in parts of the country using both 50Hz and 60Hz. Will I need a voltage converter for a) a MacBook power supply, b) a standard AC-to-USB plug? I live in the U.S.
1
vote
1answer
45 views

What happens if I use a 60W rated USB-C cable to charge my Macbook from the 85W power brick?

Will they still be able to negotiate the correct charging amount of 60W and not overload the cable?
3
votes
1answer
390 views

A1502 Late 2013 MacBook Pro will not boot, one exception

The ONLY time it's booted since it's been in my possession was when it was in the Apple Store, when it ran the Apple Diagnostics. What I've tried is: resetting the SMC (no reaction) using power on ...
3
votes
1answer
59 views

Late 2008 13" MacBook not detecting brand new battery

I bought a broken late 2008 13" Aluminum Unibody MacBook on eBay. Supposedly, according to the listing, Apple had said the original battery needed to be replaced. The other issue was the slightly-...
3
votes
3answers
67 views

Did Sierra's latest security update brick my device?

I have an mbp mid-2012 running the latest Sierra. I installed the latest update which attempted to restart the machine. The usual progress bar was showing and then it shut off. Curiously, it didn't ...
5
votes
3answers
8k views

“Battery not charging” on MacBook Pro

I have the infamous "battery not charging" problem on my 2014 Retina MacBook Pro. The power source shows as "Power source: power adapter". I checked system info and I have 1100+ cycles, which I guess ...