The electricity drained by a device

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1answer
1k views

Battery or power adapter problem?

I have a problem charging my battery. When I plug my power adapter into my MacBook Pro, the power adapter's light turns green (it doesn't change to orange) and my monitor light turns on (which means ...
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0answers
18 views

Sleep/wake Mac mini by pressing power button

I have a Mac mini that is on my network but not connected to any displays or input devices. It's running El Capitan. I want to be able to put the Mac to sleep and awake it as easily as possible. ...
3
votes
2answers
1k views

Can I charge my Samsung Omnia W with MacBook Pro USB port?

Currently, I am using a Samsung Omnia W and mostly I am using my MacBook Pro's USB port for charging it. Is it fine for charging the battery in the mobile phone? Sometimes, I have received a 'high ...
1
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1answer
15 views

How do I use a power adapter extension cable?

So I got this strange thing here: http://www.apple.com/shop/product/MK122LL/A/power-adapter-extension-cable It says that The Power Adapter Extension Cable is an AC extension cord that provides ...
1
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1answer
30 views

Power Line Adapter (PLA) network reducing Macbook Pro's battery life

I am not sure anyone has had same experience as I have. Recently bought a retina MacBook Pro and of course I was looking forward to enjoying the 10 hours of battery life that was promised. 2 months ...
1
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1answer
3k views

iPad 4 not charging solution with usb 3.0 dual ports Y adapter

Just recently picked up an iPad 4. Saw that it specifies "not charging" when plugged into the usb port. Saw that it is a common issue due to usb power. I have usb 3.0 ports on my desktop so I tried ...
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2answers
22 views

Magsafe's indicator light goes off, battery gets not charged further

Yesterday, all of a sudden, my macbook pro (15 inch early-2016) started to forget how to charge its battery. According to the battery icon, almost everything looks great but one thing. It doesn't ...
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2answers
25 views

Macbook Pro not responding to keyboard or power button

I bought a used Macbook pro mid 2010. The previous owner sold it to me because the computer would not power on. It turned out the magsafe charger was broken and it had run out of battery. After ...
1
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1answer
56 views

New internal hard drive not spinning on MacBook Pro A1278 13", Mid-2012

The Hitachi 5K750-500 initially installed in the MacBook A1278 13", Mid-2012 failed. I bought a new hard drive (Seagate ST500LT012) but it was not detected by the Disk Utility. I found that the hard ...
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3answers
4k views

Only my cable can recharge my iPhone

My iPhone cable is the only one that can recharge my iPhone 5. I have tested around 5 other iPhone 5/6 cables and none of them work. I am apprehensive of either losing my cable or breaking it. The ...
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1answer
45 views

Does Mac power adapter die if you leave it plugged in?

I have recently bought a MacBook Pro 15". A couple of days ago I had charged my MacBook and left the charger to the socket and it died. When I tried running diagnostics, it showed that power adapter ...
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0answers
16 views

I broke my Macbook power adapter, any hope of fixing it?

2 months ago the small cord on my power adapter frayed at the terminal to the adapter, so I stripped it and separated the wires, then soldered them individually back together. this fixed the problem. ...
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0answers
14 views

Apple Watch won't leave power reserve mode [duplicate]

How do I get my watch out of reserve power mode? I tried pressing both buttons and all I get is the time and a red lightning bolt. I have had it on the charging base all day but I don't think it's ...
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0answers
55 views

13-inch Macbook Pro 2015 Battery Draining on standby/sleep

I've been using my Macbook Pro(13-inch Retina, early 2015) for past 10 months. Initially, it's battery did not used to drain at all during sleep/standby mode, but recently it has started to drain (by ...
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0answers
37 views

MacBook Pro won't turn on!

I was using my Macbook Pro when it turned off. The things I had plugged in at the time were a USB cable to a sound blaster thing and then into some speakers. I also had a second monitor attached, ...
0
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3answers
52 views

MacBook Pro turned off and won't turn on!

I was just using my laptop normally when suddenly the whole computer just shut down. I turned it back on straight away and it was fine. Another hour passed and it did the same thing. I could also turn ...
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3answers
2k views

Overheating problem in MacBook Pro

I have MacBook Pro I bought 6 months ago. When I charge it, it overheats in the charging port and my charging adapter is also hot. Should I return it or keep using it?
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0answers
17 views

Late 2014 Macbook battery will not hold charge; US model used in Germany with converter

My sister has a Macbook Pro (13", Late 2014 model), purchased around Christmas 2014 (~18 months ago), which has stopped holding a charge. She can run the macbook fine off of the cord, but it ...
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0answers
10 views

Macbook Air 13" 2013 won't power up reliably

I have a Macbook Air 13" 2013 that won't power up reliably. I spilled coffee on it a couple of weeks ago and that knocked it out of commission. I was able to get it to boot up a couple of times and ...
0
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1answer
76 views

iPhone 6S (iOS 9.3.2) starts switching off whenever battery is low

So I have an iPhone 6S running iOS 9.3.2 and recently, I have observed this very annoying trend. The phone switches off automatically when the battery level is around 15-25% [It always happens in ...
6
votes
1answer
1k views

How does the iPhone know it's not using an Apple cable?

Sometimes when I plug a cable in to charge, the iPhone says it may not work with this device. How does it know it's not an Apple cable?
25
votes
7answers
60k views

What would happen if I use a Macbook Air Powersupply with a 15" MacBook Pro Retina (or vice versa)

My girlfriend has a Macbook Air. The power supply is smaller and lighter than the Pro. It has an output of 14.85V and 3.05Amps. My Pro Retina has a power supply that is 20V and 4.25 Amps. Both ...
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1answer
42 views

Macbook Pro Power Consumption

I was wondering if it is possible first of all to get the overall power consumption for my MacBook? And if it is possible can I get this power consumption for each peripheral running (like ...
0
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1answer
2k views

Macbook Pro Mid 2010 not powering up after smc update

Macbook Pro Mid 2010 after SMC update 1.7 shuts down and now by pressing power button front light turning on for a few seconds, optical drive makes it's usual noise but no activity on monitor happens ...
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votes
3answers
1k views

iMac + uTorrent energy saving

I want to keep my iMac on tonight and seed/leech torrents. I usually leave it there until, after 5/10 min or so, the iMac turn the monitor off. I can still hear the hd working. uTorrent has an option ...
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0answers
22 views

iMac 5K able to fully restored after power loss

This afternoon, a thunderstorm cause my house's circuit breaker to cut off all the power of my house, my iMac was in sleep mode, I then unplug the power cord from power outlet of my iMac just for ...
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2answers
76 views

Any way to turn on the reduced power mode a macbook uses under battery power, but while plugged into a power adapter?

I have an external battery rigged up for my MBP. It goes through the magsafe adapter. The battery is about twice the capacity of the internal battery. The problem is, the macbook thinks it is ...
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0answers
30 views

Faulty magsafe 2 diagnosis

I found a Magsafe 2 60W power adapter in the electronics trash and I would like to find out where it's fault is. I am pretty sure I can handle most of the common repairs on the chargers. I am asking, ...
3
votes
3answers
5k views

Apple charger port magnet has lost it's pull

My friends laptop was dropped and fell directly on the power charging connector as it was connected to the charger. Now the port still works, but the strength of the magnet that holds the connector ...
1
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2answers
87 views

Charge my Mac via USB

I have a portable power bank and I can charge devices via USB on it. Is there an adapter to change a 3 prong charger to a USB, so I can plug my Mac into my power bank? A Mac air charger that can plug ...
0
votes
1answer
144 views

MacBook Air charging light stays amber and does not go green and machine does not boot or even chime

I have an 11" MacBook Air 6,1 from mid 2013 that I found discarded and had restored but now seems dead again. I got the machine with a broken screen backlight and missing SSD. I took it to the Genius ...
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0answers
146 views

Turn off USB power on OS X/Mac Mini

I have a need to turn USB power off (and on) using a script or a piece of software. Ideally it should be possible to turn each port off/on separately, but also turning power off/on from all ports at ...
2
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2answers
52 views

MacBook Air 2012 won't charge or boot

I have a Mid 2012 11" MacBook Air that won't charge or boot. I've tested the charger with multiple other MacBook Airs, and the charger works fine. I have researched this and have done everything from ...
4
votes
8answers
28k views

Best replacement for MacBook Air MagSafe 2 cable (OEM or 3rd party?)

My MagSafe 2 cable for my 2012 MacBook Air stopped working. Took it into Apple store where I had bought my MacBook Air, and sure enough it was the excessive cat chew marks that had degraded it*. Can ...
1
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2answers
63 views

Debugging charging problem with MacBook Pro

I have a MacBook Pro (unibody late 2008 15") A few weeks ago the charger was causing hassle and eventually the connector came loose. The MacBook eventually lost power. Then, I asked my friend for ...
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0answers
58 views

iOS BLE Low Energy Power/Current consumption issue (in connected state)

Background – A BLE LE device acting as a peripheral is “connected” to an iOS9 app in the background acting in a central role. We have ability to measure the current consumed by the BLE LE device. ...
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2answers
87 views

Can I charge my battery with a higher wattage charger than what came with device

Will it hurt my battery to use a 12w charger instead of a 10w that came with my iPad Air 2. iPhone charger says 12w can I use this on my iPad air2
8
votes
6answers
51k views

“USB device drawing too much power” error on startup with no devices connected

Since upgrading to Lion, I get this error every time I start up: I've read the answers suggested here, but they seem to indicate that it's the presence of a second device that's causing the problem....
5
votes
1answer
436 views

Can an iPad be charged while acting as a USB host?

I have an iPad that I would like to leave semi-permanently connected to a USB hub (connected to a couple of MIDI controllers and some USB speakers). As it stands, I have to remember to unplug it ...
0
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1answer
37 views

What is the maximum safe current for Mac Pro PSU?

I regularly put my 2010 Mac Pro under pretty heavy usage, maxing out the 12 core CPUs and GTX Titan Black. I can monitor the voltage and current using iStat Menus, but I'm looking for a specification ...
0
votes
1answer
19 views

MBP 2010 15" won't boot without disconnecting power and battery

My MBP 2010 will only power-up if I disconnect power and battery, and then only connect power. When I shut it down, it'll only power up again if I remove the power first for >10 seconds. I've tried ...
1
vote
1answer
7k views

How much power does Apple TV use on standby?

I just bought a third-gen Apple TV, and I don't want to have to open Settings to put it to sleep every time I'm done using it. It seems it won't fall asleep automatically for quite some time, so I'd ...
1
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1answer
24 views

OK to power off Apple TV (4th gen) at the mains when not in use?

I've just given an Apple TV (4th gen) to a relative, who is in the habit of powering off the whole TV system (TV, DVD player, stereo etc) when it isn't in use. Is it OK to: remove power from the ...
1
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1answer
7k views

How can I force my laptop to shut down when I close the lid?

I'd like my Mac laptops to shut down completely when I close the lid. This is partly for convenience and partly for security reasons. I couldn't find a way to do this in the System Preferences (OS 10....
0
votes
1answer
62 views

iMac 27' powering off without reason

I have been the owner of an iMac 27' for the past 3 years. I have had the problem of the machine automatically powering off (for no reason at all) since almost day 1. After trying everything, ...
3
votes
3answers
4k views

Can I (or should I) use a MacBook charger on my iPhone?

I recently got a MacBook with the USB-C charger. It comes with a 29-watt power brick, and I was wondering if I should use this to charge my iPhone. I've heard that the iPad power brick (I think 10 ...
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0answers
22 views

Is there an alternative to hiding an application that will reduce the performance demand?

I'm just wondering if there is an alternative to hiding an application, that can reduce the performance demand of a program. I'm curious because I use blender from steam, but steam won't close unless ...
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2answers
66 views

At how many battery cycles should I consider replacing my battery?

My battery has become quite a pain in the neck recently, It's not lasting much more than about 2 or 3 hours and that's usually just using basic programs like chrome or pages etc. It's difficult for me ...
9
votes
2answers
69k views

Is it safe to use my US iPhone/iPad charger with a simple European plug adapter?

I'm using the US wall adapter that came with my iPhone to charge it: When I travel to Europe, is it safe to use this with a simple US-European adapter, or do I need a transformer or some other ...
0
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1answer
93 views

MacBook Air won't power on, except I remove the battery and plug it back in (SMC reset?) - sleep works

I have a bizarre problem with my 2012 MacBook Air 13": At some point, a couple of weeks ago, it suddenly stopped turning on. The battery would charge, but pressing the power-button just wouldn't have ...