The electricity drained by a device

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0
votes
2answers
9k views

iPad screen is black and won't turn on after charging and resetting

Yesterday I dropped my iPad 3 but luckily the screen did not crack. However the screen is now black and will not turn on. I can still here sounds from the iPad. How can I fix this? What I tried: ...
0
votes
2answers
156 views

Is there a way to prevent a Macbook Air from sleeping when external monitor is plugged in but power is not?

I have a 13-inch Mid 2012 Macbook Air running 10.9.3. I usually run with the lid closed plugging into 2 Apple cinema displays. Everything works great, except when I accidentally bump the power cable, ...
0
votes
2answers
678 views

Stop MacBook Pro from disconnecting network while downloading larger files

I am using a Gigabit Ethernet adapter (Apple) to connect to my network. While downloading larger files the MacBook Pro blanks the screen and disconnects the network even though it is active doing the ...
4
votes
5answers
517 views

No Batteries Available ?-How to Check battery health on MacBook Pro early 2011

A few days ago, I went on vacation and unplugged power cable from my MacBook Pro 13' early 2011 and then I got back home, the battery was not detected by OS and didn't charge. I then understood that I ...
1
vote
1answer
21 views

Is it safe to use the mac's cable for an airport express?

When you pull the power plug off the airport express, a connector appears, similar to the connector on the mac's power brick. These connect perfectly, but I want to be sure: is it safe to use a mac's ...
0
votes
0answers
21 views

iMac shutting down when trying to install downloaded updates from Apple

My iMac keeps shutting down when I try to install the downloaded updates. It gets to "optimizing" level and shuts down.
0
votes
2answers
141 views

How to charge the MacBook Pro from 12 Volts?

Aim: I would like to charge my MacBook Pro (MBP) form a 12V lead-acid battery. However there are no official chargers from Apple for that purpose. There exist quite some alternative products on the ...
1
vote
1answer
78 views

How to limit cpu frequency in OS X?

The OS X kernel does control this directly since below 5% my CPU gets locked to 1.2GHz instead of the normal 3.7GHz so there has to be a way to control the CPU speed. I am aware of this question ...
0
votes
2answers
86 views

MacBook Pro Hibernates Straight Away

Whenever my Mac goes to sleep when its on battery, it straight away saves its contents to the hard drive and powers off, going into a deep sleep. This gets really annoying when I walk away for 10 ...
1
vote
1answer
548 views

Why do I have to reboot my iMac and Wacom Cintiq after sleep?

I have an iMac and a 24 inch Wacom Cintiq. When I put the iMac to sleep, it freezes and I have to restart both the iMac and the Wacom Cintiq. How can I get around this?
21
votes
8answers
30k views

Is it OK to charge my iPhone with my iPad charger?

I have an iPhone 4 and an iPad. Since the iPad really charges best off the wall charger I keep it plugged in, but I usually just charge the iPhone off the computer. Although frequently if the iPad ...
2
votes
1answer
43 views

Prevent iPhone from charging when plugged into a battery powered MacBook Air

I would like to prevent my iPhone draining power from my MacBook Air while the laptop is not plugged in and relying on battery power. How would I do this? Note, there doesn't seem to be any "unpowered ...
1
vote
1answer
55 views

A1208 2006 Intel iMac Power Supply “Power Good” voltage?

This might be a bit specific, but I am trying to test a trashed A1208 Intel iMac (Late 2006 17" Model). The power supply is dead (Fuse was blown, bypassed with a wire and bang poof a resistor and ic ...
5
votes
2answers
5k views

Monitoring power consumption on Mac

The Android OS monitors the power consumption of running apps and hardware (display). As you may guess, this is a useful feature as it allows to track down energy greedy apps. Is there an application ...
1
vote
1answer
39 views

using Apple products abroad: just replace the plug?

For many Apple products, e.g. macbook air, or iphone, the power supply is the same for different countries, and it accepts a power range of 100-240V and 50-60Hz (which I think is a great idea, since ...
10
votes
2answers
459 views

How does Apple calculate the energy consumption of a process in OS X Mavericks

In OS X Mavericks you can monitor the energy consumption of different processes in the "Activity Monitor"-App. Also there will be a menu bar icon which lists the most energy consuming applications ...
2
votes
0answers
34 views

Earthed (Grounded) Stubby Plug for MacBook AC Adapter

Much hay has been made of the apparent grounding issue while using the stubby plug on a MacBook AC adapter. While I understand it is completely safe to have a bit of grounding flowing through the ...
2
votes
6answers
9k 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 ...
6
votes
3answers
14k views

Does closing the lid put a MacBook Pro to sleep? Would it hurt the computer if I carry it around without shutting it down?

When I first got my MacBook Pro, it took less than 30 seconds to start up. Now, after several months, it takes about two minutes to startup and I can tell that it is not as responsive when using some ...
1
vote
1answer
222 views

MacBook Pro Battery Problems

I have a MacBook Pro late-2012 model. And my cable started showing symptoms of fraying. So I ordered an offbrand cable from Amazon with good reviews and it arrived today and I tried it and the Mac ...
1
vote
1answer
85 views

Powering a graphics card in a Mac Pro 2008

I'm looking to update from the stock graphics card in my my Mac Pro 3,1 (2008). The logic board only has two 6-pin ATX connectors, and the card I'm looking at (a GeForce GTX 760) requires one 6-pin ...
1
vote
2answers
642 views

How to reduce MacBook Air 2013 1.7GHz CPU power consumption?

I'm seeking a way to reduce MacBook Air 2013 1.7GHz CPU power consumption -- or any MacBook for that matter -- to save battery life. I want to vary the CPU power consumption variably, so that I can ...
2
votes
4answers
8k views

Keep iPhone Screen On (when plugged in)

Is there an app (normal, jailbreak) that will keep my iPhone (3GS, OS 4.x) screen on, indefinitely, when it is plugged in, regardless of what app is running in the foreground?
1
vote
0answers
54 views

Macbook Pro (Mid 2010) replacement power supply issue

I have a multi macbook/macbook pro household, made up of a 2006 mb, mid 2008 mbp, and mid2010 mbp models. I recently purchased a new 85 watt power supply and immediately noticed that it would not ...
12
votes
3answers
2k views

Can I restore pre-Mavericks power key behavior?

Mavericks changed the behavior of my MacBook Air's power key to put the Air to sleep immediately when pressed briefly. Prior to Mavericks, the power key would summon the Shut Down dialog. As ...
0
votes
1answer
34 views

Mouse Power Issue

When I plug in a third party mouse into my iMac it does not get any power. I've tried the USB port on the keyboards and directly on the machine. I've tried two mice and one of them used to work (I ...
8
votes
2answers
6k views

How can I keep my Mac awake AND locked?

I want to leave my Mac awake overnight so it syncs 4GB of data from Dropbox. I need to prevent the machine from going to sleep because that pauses the Dropbox sync I've been using Caffeine to keep ...
2
votes
0answers
61 views

Find out what adaptor power socket an unopened iPhone 5s has

I have an unboxed iPhone5s here, which I have received as a gift from a friend who also received it as a gift and did not want it. I might end up regifting it myself, so I would rather not open it. ...
0
votes
2answers
70 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?
3
votes
4answers
1k views

MacBook won't sleep while charging

An ongoing problem: my MacBook Pro (i5, 2.4ghz, 15") won't sleep while charging. I close the lid, but I don't get the pulsing "sleep light", it just stays fully illuminated. If I listen closely, I ...
0
votes
0answers
59 views

Battery indicator is stuck on one number

I have an iPhone 4s and the battery indicator is stuck on one number no matter how long I charge it. If I turn the phone off and then try to put it it on again it won't happen it will say the phone ...
3
votes
1answer
20k 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
2answers
294 views

Where are the power-on jumpers on a mid-2013 MacBook Air logic board?

I'm trying to locate the power-on jumpers on the logic board of mid-2013, 13" MacBook Air. Similar to this question, but for the newer model MacBook Air. I have disassembled and cleaned all ...
2
votes
1answer
84 views

Can a thunderbolt cable transmit power?

Is it possible for thunderbolt to transmit power to or from a Macbook Pro. Perhaps to power/charge it or power/charge an external device?
2
votes
3answers
973 views

MacBook Pro shuts down when unplugged

I have a late 2008 MacBook Pro work computer. Here's the sequence of events: I fully charge the battery I unplug the Mac from the power cable The Mac immediately shuts down Before unplugging the ...
14
votes
3answers
10k views

Why does GPS on the iPhone use so much power?

I keep reading in articles that GPS on the iPhone, or any cell phone for that matter, uses a lot of power, but I've never heard an explanation of why. Why is this? The phone doesn't have to transmit ...
0
votes
1answer
493 views

My MagSafe to MagSafe 2 converter becomes extremely hot. Why?

Out of nothing, my MagSafe to MagSafe2 converter became extremely hot while charging. So hot, I could not even touch it. What could cause it? I've been using it so I can leave multiple old 85W ...
3
votes
3answers
4k views

Can I safely charge an iPhone 4S with a 5V 2A source?

I just bought a New Trent IMP99D external battery, to keep my phone alive while gaming during long-haul flights. It has two USB ports to connect to, one which supplies 1 amp at 5 volts, another which ...
1
vote
1answer
68 views

Will a MacBook with its lid closed (asleep) restart at the scheduled time?

I think the title says it mostly. Will a sleeping MacBook Air with the lid closed restart automatically at the time scheduled in the energy saver pane?
2
votes
2answers
1k views

Are L-shaped and T-shaped Magsafe 1 interchangeable? [duplicate]

I want to buy replacement Magsafe 1 cable for my MBP 17" Late 2011, and they are available in two options — L-shaped and T-shaped. My computer was shipped with L-shaped connector, however I want to ...
0
votes
3answers
2k views

App to shut down iPhone 3G

Is there an app to shut down my iPhone 3G? It's a non jailbroken iPhone and the power button isn't working anymore. So I need to shut it down with an app. Any advice?
2
votes
1answer
400 views

How much power can be drawn from the lightning connector by a external device?

How much power can be drawn from the iPhone/iPad lightning connector by a external device? Update: The use case is a audio-related device for iPhone/iPads. It would require around ~100 mA at 3,3 ...
1
vote
2answers
416 views

iPhone/iPad/iPod turn-off blocking?

Its possible to block turning off the iPhone/iPod or iPhone? For example, in case of loss, theft? The point is that the thief could not turn off the iPhone, so I could find iPhone through Find my ...
1
vote
1answer
522 views

iPhone 4 cannot be charged via power supply after iOS 7 update

Using an iPhone 4 and a original power supply (a1357) + cable (usb) i am not able to charge the phone. However connecting my phone to the pc (windows) it will be recognized and charge. This ...
0
votes
1answer
542 views

Correct battery voltage for new MacBook Pro battery

I have a 17" Macbook Pro (5,2 mid 2009, MC226LL/A) that has a battery that is in need of being replaced. I'm looking for the correct battery for it and have found various batteries that say they are ...
1
vote
1answer
74 views

Is there an app for iphone that can notify me whenever my mac powers on?

I would like to know if there was an app that can notify me whenever my mac is powered on. like IFTTT app. example if mac powered on then send a message to iphone.
0
votes
0answers
35 views

How to properly setup sleep mode?

Recently upgraded to Mavericks and faced one problem: my mac book pro mid 11 goes to sleep after some time... I set that monitor would go off after a minute and hdd never, that if i leave my pc at ...
2
votes
1answer
50 views

Why am I told to “Connect to a power source” for best results when installing/updating software?

I've experienced this when installing or updating a number of applications, most recently Logic Pro X. What's the reasoning behind this?
1
vote
1answer
39 views

Lots of weird stuff happening today

So I'll just list the symptoms I've experienced in the last few hours, so far I can't seem to find a pattern, suffice to say the macbook is virtually unusable for my purposes. It's a 2010 Macbook ...
2
votes
2answers
365 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 ...