The electricity drained by a device

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2
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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 ...
0
votes
0answers
14 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 ...
1
vote
2answers
52 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 ...
0
votes
0answers
19 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
4k 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
vote
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?
1
vote
2answers
48 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
69 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 ...
0
votes
0answers
77 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
votes
2answers
47 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 ...
3
votes
8answers
27k 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
vote
2answers
52 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 ...
0
votes
0answers
26 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. ...
1
vote
2answers
62 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
50k 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 ...
5
votes
1answer
416 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
votes
1answer
29 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
15 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
vote
1answer
19 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 ...
2
votes
3answers
3k 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 ...
1
vote
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 ...
0
votes
1answer
34 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
3k 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 ...
0
votes
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 ...
0
votes
2answers
43 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 ...
8
votes
2answers
64k 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
votes
1answer
48 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 ...
1
vote
1answer
75 views

MacBook Pro Boots only with a pressed key

I'm having a bizarre issue with my early 2011 Macbook 15'. I grabbed it today without battery power só the first thing I diz was to plug the MagSafe adapter. Afterwards I pressed the power button. It ...
1
vote
0answers
12 views

How to drawn power from a lightning connector?

I'm working on an iPhone accessory that needs to grab power from a lightning connector. Something like the lightning-to-USB cable, but I'd like to do that on a DIY way :) The problem is that, ...
0
votes
0answers
19 views

How can I SMC Reset with this issue?

Okay so my friend gave me his old mid-2010 MacBook Pro. It has an aftermarket battery in it, the first one died and after his friend put the aftermarket one in it never started. I did the cycle where ...
1
vote
1answer
52 views

mid-2012 Macbook Pro Retina 15" won't recognize new adapter

I recently bought a new power adapter off Amazon, and it worked with my mid-2014 MBP at work and my colleague's mid-2014 MBP, but not my mid-2012 MBP Retina 15" (which, frustratingly, it was bought as ...
0
votes
0answers
6 views

Is there a way to get live power usage

I'd like to monitor how much power is being used by my Mac. The tools I've found so far either list the maximum power (85W for my laptop charger) or the processor's usage (Intel's Power Gadget). I'd ...
0
votes
1answer
35 views

Macbook Air recognizes battery while starting, but later says “no battery available” (battery icon X)

I spilled a full glass of water on the keyboard of my Macbook Air 11" mid-2011 (running OS X Mavericks). After drying everything out, etc., here's what happens when I start the laptop: It has to be ...
1
vote
1answer
279 views

Mac does not automatically restart when power is re-applied after `shutdown -hu now`

I want to have a Mac Mini automatically boot when power is applied, as I cannot conveniently reach its power button, because it resides inside an art installation, where the power will be shut down ...
0
votes
0answers
24 views

Macbook pro never goes to sleep

I got a brand new mid-2015 macbook pro 15", OSX 10.11.3. Display never turns off even it is configured to turn off after 10 mins in power adapter AND in battery mode. Screen saver (aerial) stays ...
0
votes
2answers
44 views

Battery not charging? (Even after SMC reset)

So, I've seen a couple topics like this that already exist, but none solved my problem. I plug in my charge to my 13-Inch MacBook Air, Early 2015, and the LED light did not turn on, and the battery ...
1
vote
1answer
76 views

Is it safe to swap the “duckhead” connector from an old power supply to a new MagSafe 2?

Working from home today and I just pulled my macbook pro out to realize that I left the "duckhead" part of my magsafe 2 power supply (85W) sitting on my desk when I left the office last night. I ...
0
votes
0answers
45 views

2011 Macbook Pro won't boot unless I SMC reset and do a combination of attaching battery and charger

From what I read, on this model of MacBook, an SMC reset is done by removing the battery and holding the power button down for 5 seconds with no charger or battery attached. I tried the other method ...
1
vote
2answers
27 views

Make Mac boot upon plugging in power

I have a MacBook and I'd like it to boot automatically upon plugging it into a power source. Is there a way to do this?
-1
votes
1answer
2k views

Charger problem for Phone purchased in US

I purchased Iphone 6 in US, and would be coming back to India. Which charger I should use here in India, as I know that there is a voltage difference in US and in India.
3
votes
1answer
360 views

How to disable the “this cable or accessory is not certified” message on iPhone?

The message "this cable or accessory is not certified and may not work reliably with this iPhone" pops up whenever I use a 3rd party USB cable for it. It's really annoying, because then I'd have to ...
0
votes
0answers
105 views

iMac will not boot up with built-in LCD connected, but will boot without it

When I press the power button on my iMac (Early 2008 24" A1225 EMC2211 MB325LL/A) it begins to start up, but halfway through the start chime it loses all power and needs to be unplugged before the ...
0
votes
1answer
52 views

Can a 3.7 Watt LiPo battery trigger the charging symbol on an iPhone?

I am trying to use a 3.7 Volt 1 Amp (so it's 3.7 Watts) Lithium Polymer battery to charge or at least trigger the charging symbol on an iPhone 5. I have charged the battery fully using the Lithium ...
0
votes
2answers
4k views

Power reserve mode - lightning bolt

I cant get the watch out of power mode. It has a lightning bolt on the screen. What does this mean?
0
votes
0answers
50 views

Power button, keyboard not functional after thermal place replacement (MacBook Pro 13, Late 2011)

After some searching on the internet, I have been struggling to reconnect the keyboard to the MacBook Pro after taking out the logic board to replace the aging thermal paste. I was following the ...
0
votes
1answer
26 views

Splice a 45W MagSafe 2 connector onto an 85W PSU?

I have an unused 45W MacBook Air MagSafe 2 PSU, and an 85W MagSafe 1 PSU that my dog chewed the connector off. I'm wondering if splicing the MagSafe 2 connector onto the 85W PSU would allow a MacBook ...
23
votes
7answers
56k 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 ...
0
votes
0answers
98 views

Pinout and specs on 150W Cinema Display A1098 power supply?

I've inherited a 30" Apple Cinema Display. It's in great condition except for one thing: no power supply. I could pay $150+ for a used power supply on eBay, but -- with my past life as a ...
42
votes
10answers
77k views

Can I use 45/60/85W MacBook chargers interchangeably?

I have a 13" Macbook Pro that came with a 60W power adapter and a 15" Macbook Pro that came with a 85W power adapter. Can I use either adapter with either laptop? There seems to be disagreement in the ...