The electricity drained by a device

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0
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2answers
405 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
565 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
93 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 ...
2
votes
1answer
228 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
325 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 ...
6
votes
2answers
6k 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
60 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 ...
2
votes
6answers
13k 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
17k 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
265 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
482 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
737 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 ...
3
votes
4answers
11k 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?
13
votes
3answers
3k 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
36 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 ...
12
votes
2answers
11k 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
82 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
229 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
342 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 ...
2
votes
1answer
280 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
1k 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 ...
3
votes
3answers
6k 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
139 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?
3
votes
2answers
4k 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
1k 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
442 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
594 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
1k 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
81 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
43 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
67 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
41 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 ...
8
votes
6answers
34k 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 ...
2
votes
2answers
2k 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 ...
4
votes
7answers
7k views

Is my MagSafe covered under my MacBook's AppleCare?

I have a white 2010 MacBook, and the outer casing for the wire on the MagSafe power adapter has developed a small split. Is this something that may be covered under my MacBook's AppleCare? Is it ...
32
votes
9answers
50k views

Can a 60W MagSafe power adapter work interchangeably on a Macbook Pro that “requires” an 85W adapter?

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 ...
0
votes
1answer
152 views

Is there a way to view and control the powerstate of the discrete GPU on a 2011 MBP in OSX?

I noticed that running with the discrete GPU uses more power and generates more heat. I just need the discrete GPU to drive an external monitor, I'm not concerned about performance. By controling the ...
0
votes
4answers
649 views

Macbook Air power saving with Thunderbolt to Gigabit adapter

I am considering buying a Thunderbolt to Gigabit adapter to save my MBA power consumption as I can shutdown the Wifi, assume it use a lot of power. Anyone tried before and it works? How many % of ...
2
votes
3answers
6k views

Out of warranty MBP ,Burned Magsafe port and frayed charger cable - repair option and cost?

I have a MBP 15" 2011 model and has is the burned magsafe port (leftmost pin melted) which i noticed today. The connector gets too hot sometimes ( but remains ok when I charge in sleep mode). ...
1
vote
0answers
417 views

Dim LED on Magsafe, Macbook Pro won't boot

I have a Macbook Pro late 2008, and today, it suddenly decided to stop booting. The battery level is very low, and connecting the adapter to it shows a very dim green light on the Magsafe connector. ...
3
votes
1answer
3k views

Magsafe light occasionally turns off while plugged in

Every once in a while, the green light on my Magsafe adapter will turn off, but the computer will indicate that it's still running off of AC power. If I unplug the adapter from the computer and then ...
1
vote
1answer
123 views

IOS 7 Power Drain

What settings minimize power loss on a 4S? I upgraded to IOS 7 and have noticed a signiicant power drain
6
votes
2answers
554 views

Xserve shuts itself off and boots at will

Okay, there's a lot of smart Mac guys here, so lets see if any of you can figure out this stumper. Our Xserve G4 (RackMac1,1) went incommunicado a few years ago was left in this state until I pulled ...
0
votes
1answer
123 views

Charge iOS device through mains whilst using data cable with laptop

Take two Apple data sync wires: Cable 1, which connects the iPad to a laptop USB port, and Cable 2, only connected by itself to an iOS data charger socket plugged into the mains, ready to ...
5
votes
1answer
2k views

iPod classic 80GB won't charge from usb power adapter

iPod classic 80GB 2007 [Model No.:A1238] won't charge from LG usb travel adapter (output 5.0V, 0.85A). It normally charged from Apple 5W USB Power Adapter [Model No.:A1299] (output 5.0V, 1A), and ...
0
votes
1answer
145 views

Mac book charger

Will using a 45w charger on my mac book pro 13 that came with a 60w charger cause operating problems? Sine using a 45w charger my laptop cannot get past the grey/white loading screen?
16
votes
6answers
10k views

iPad displays “Not Charging” when plugged into USB ports. What can I do?

When I plug my iPad into my computer's USB ports, the iPad battery area displays "Not Charging". I understand the iPad requires more wattage to charge compared to an iPhone or iPod, as evidenced by ...
0
votes
3answers
5k views

Macbook Air short Battery Life

I purchased Macbook Air 13 in late 2012. It is advertised as having 7 hour battery life. After a few months of use, with maximum charge it gives me only 2 hours. Is this normal?