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Questions tagged [power]

The electricity drained by a device

2
votes
0answers
20 views

How to see if a remotely controlled Mac is powered off completely

I have an 13 inch MacBook Pro which I run with closed lid all the time over a VNC connection. To power it on, I power up the mains adapter and the energy settings on the Mac are configured so that ...
2
votes
1answer
21 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 ...
1
vote
0answers
26 views

Skipping battery level screen when powering on MacBook Pro with Touch ID button

My MacBook Pro used to turn on automatically when I opened the lid. I didnt like that so I disabled that feature. Now I can manually turn on the macbook but it requires a couple button presses and a ...
0
votes
0answers
14 views

MacBook 2009 - won't turn on

I'm working on a MacBook (13-inch, Late 2009) 2.26 GHz Intel Core Duo. The device no longer turns on. I have tried a known good power connector to no affect. I had the logic board exposed and had ...
1
vote
1answer
19 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 ...
1
vote
0answers
15 views

2017 MacBook Air suddenly wouldn't turn on/wake up

My MacBook Air drained out of power. Now when I plug it in, it wouldn't start. I have tried resetting the SMC and NVRAM. One peculiar thing that I noticed is that the MagSafe power cable is showing ...
1
vote
0answers
12 views

Mid 2013 MacBook Air charging fine but the light on the cord is out

I tried resetting the SMC as I saw this repeatedly being suggested as the solution but this did nothing. Computer charges fine but any light on the cord is out. Any other suggestions? Am I damaging ...
1
vote
1answer
24 views

iPhone won’t shut off

My iPhone 5s just randomly stopped allowing me to shut it off with the power button. I don’t understand why but every single article online says that it’s a relatively common problem and the way to ...
1
vote
2answers
23 views

MacBook booting to black screen

I am currently unable to boot my Late 2013 MacBook Pro. When I attempt to boot, the backlight comes on, but there is no image on the screen. When I try to boot into Safe Mode (by holding Shift), ...
1
vote
2answers
41 views

Does “Prevent computer from sleeping…” remain in effect even if I close the lid?

These are the default settings for when a Mac laptop is plugged in: Notice how the display will be turned off automatically after 10 minutes of inactivity, and the ”Prevent computer from sleeping…” ...
1
vote
2answers
59 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 ...
-1
votes
1answer
41 views

How can I troubleshoot Macbook pro 13 with touch bar model 2017 that won’t start?

I took my Mac on vacation where it was working fine. Upon return, I opened it up and nothing; no start or any sound. I tried all the tricks of soft keys but nothing. I don't understand what went ...
5
votes
2answers
97 views

iPhone 7 Plus takes days to turn on showing Apple logo or black screen

I’ve had this issue for months but in the last couple of days it’s got very very bad. When my phone runs out of battery it needs like 2–3 days to turn back on. At the beginning of this problem the ...
10
votes
5answers
3k 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 ...
2
votes
2answers
62 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
445 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
1answer
218 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 ...
2
votes
0answers
42 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
100 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
79 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 ...
1
vote
1answer
135 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 ...
4
votes
1answer
66 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
25 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
177 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'...
1
vote
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: ...
1
vote
0answers
40 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
42 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
280 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
766 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
36 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 ...
5
votes
1answer
605 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 always keep my phone ...
1
vote
1answer
67 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
1k 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
369 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
103 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
160 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
36 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 ...
3
votes
1answer
60 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
93 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
80 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
464 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
319 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
6k 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
20 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
35 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
2k 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 ...
2
votes
2answers
1k 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 ...
3
votes
2answers
1k 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
111 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
85 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 ...