The electricity drained by a device
0
votes
0answers
13 views
Macbook randomly shuts down without on charge (even at ~90% full)
I'm having a real issue with my Macbook (white, late 2009 version, running Lion OS X). It was about since 2 weeks ago or so, my Macbook would just randomly shut down, I lost a couple unsaved files ...
2
votes
1answer
33 views
No power through USB for Roland A-49
I just plugged my Roland A-49 to my MacBook Pro (Early 2011 2.3 GHz). The MIDI keyboard would have its power supplied via USB, but it has no power. The specification says it needs 98 mA current, which ...
0
votes
0answers
83 views
Quickly dim the iPod Touch by hitting the power button twice on the lock screen?
I've always wondered if this was a feature or not. When I'm on my iPod Touch's lock screen, then I hit the power button twice, the first hit will sleep the device, the second will wake it again but ...
0
votes
1answer
83 views
Macbook Air 1,1 power consumption
I have the original MBA, and I have extremely high power consumption - see the screenshot (screenshot got while TextEdit only was running)
Is is normal for original MBA?
1
vote
1answer
45 views
know how many watts a USB device is consuming
I know it's possible to do some electric hack to know how much current a device is using... but that would be a 1 time usage so it would be a waste of money and parts.
Is it possible to know that ...
0
votes
0answers
19 views
Powerbank suggestions for an iPhone
I'm new to the powerbank discussion and would like to know what people are using/recommending in terms of a backup battery supply for their iPhone?
Thanks again for the input
1
vote
1answer
60 views
Will one power adapter work with all shipping MacBook Air and Pro as of March 2013?
I have a Late-2008 Macbook White (MacBook4,1) model, and my AC Adapter broke.
Now I want to buy replacement adapter, but since I am going to upgrade to a MBP13 or MBP15 in the next 1-2 years, I want ...
1
vote
2answers
68 views
Electricity coming through screws, USB, and headphone jack on 2009 MacBook
I've seen some online threads and at least one StackExchange question on this, but the answers don't seem to apply to my situation.
I have a 2009-vintage white 13" MacBook that's always been in great ...
0
votes
1answer
67 views
What are some effective ways to save power when using my MacBook Pro?
I have an Early 2011 MacBook Pro (Core i7, 8GB RAM) with Mountain Lion (OS X 10.8.2).
What are some effective ways to save power? I am looking to maximise use of the battery - from a full charge - on ...
1
vote
1answer
37 views
Which Power Adapter is the correct one for Powerbook G4 15inch FW800 - 45watts or 65watts
I have a Powerbook G4 15inch FW800 with a 45watts Apple style power adapter. Recently it would not boot up. I removed the battery and it did. However after a shutdown, later on it did not boot up ...
1
vote
0answers
1k 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 ...
0
votes
1answer
150 views
Sleep button broken. How do I find out which part is affected?
The sleep/power button of my iPhone 4 is broken; it suddently didn't really "click" anymore and just hardly reacted on my actions. For some hours by clicking really firm it still worked, but then the ...
0
votes
0answers
99 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 ...
1
vote
1answer
264 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 into 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
0answers
151 views
Fluctuating voltage on Magsafe charger
I got two Apple Magsafe charges, one for which I needed to cut and rejoint the cables. The fix went well and now when I plug in the charger it works and charges my Macbook Pro.
Though when I measured ...
0
votes
1answer
127 views
MacBook Pro battery charging stops early
I have a Mac Book Pro 15" over a year now. I'm having a problem with charging the battery.
During work it stops charging and goes to battery powered mode. If I switch to a different power source it ...
0
votes
2answers
2k 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?
1
vote
0answers
54 views
How to identify the 3 thermals sensor connectors from the mac mini motherboard?
I opened my mac mini to switch the DVD with another hard drive and I forgot to take a picture with the ways the 3 thermal sensors are connected.
THeir codes on the mainboard look like:
J5550 - left ...
2
votes
2answers
159 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 ...
1
vote
4answers
1k 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 ...
2
votes
1answer
435 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 ...
1
vote
1answer
214 views
How to use new Macbook Air's power adapter with previous generation MacBook Pro?
I have a MacBook Air (Late 2012), which has the new Magsafe 2 power connector.
I would like to use the power adapter with my 15" MacBook Pro (Mid 2010).
Is there an adapter for it? A quick search on ...
10
votes
1answer
169 views
Macbook started to consume battery more quickly
This seemed to happen after I did several things at once (all of which I have since reversed in trying to track this down):
installed a (Crucial M4) SSD drive (replacing my old SATA 5400 RPM drive),
...
1
vote
1answer
153 views
Can I still use a damaged Magsafe power cable?
My rabbit chewed on my Magsafe 2 power adapter. I can see the silvery wire where the rabbit peeled off the isolation yet it still works.
Can I just duct tape it and continue using it or is there any ...
3
votes
5answers
2k 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 ...
1
vote
1answer
1k views
Force hibernate (deep sleep) in OSX 10.8(.2)
How can you force the computer (in this case a laptop [rMBP]) into the "hibernate" state where it writes the RAM to the HDD/SSD so that the battery can last for the advertised 30 days.
I know that ...
7
votes
1answer
399 views
Phone-only mode on iPhone
Is there a way to switch the iPhone’s functionality to a phone-only mode. In this mode only incoming (and possibly outgoing) calls and SMS messaging would be activated. All other services (location, ...
0
votes
1answer
94 views
Does shutting off a modem daily damage it? [closed]
I switch off the power bar which has my modem and computer plugged into it a few times per day. Two days ago, a technician changed the old wiring since my Internet completely stopped working.
I am ...
0
votes
2answers
477 views
Should I use an extension power cord instead?
I have the following Apple MacBook Pro Power adapter:
60W MagSafe PV85 Ouptput 16.5v--3.65A ADP-60AD T
Model No. A1344
Instead of buying a Power Adapter, is it ok to buy an Extension power ...
1
vote
2answers
1k views
Retina macbook max USB power output
Could someone tell me how much Ampere the retina macbook pro can deliver over usb. I thought that one should be able to charge an ipad with a retina macbook which would mean, that it should be about ...
1
vote
0answers
158 views
Pop-up notification (or notification center notification) for battery in OS X Mountain Lion
I don't have the battery/AC icon turned on because, for the most part, there's no reason for it to be there - I typically get cord-free 5 or so hours at a time, so it seems redundant.
Still, ...
3
votes
3answers
2k views
How do I locate applications that drain my battery on a MacBook Pro?
I purchased a new Macbook Pro and have since downloaded a ton of applications and add ins. I think some of these apps are responsible for draining my battery too quickly.
How do I identify what ...
1
vote
1answer
680 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
0answers
191 views
Charging suddenly stopped
After opening the lid on my 2010 MacBook Pro, the machine indicated it was not charging yet and the MagSafe light was amber.
I followed the SMC instructions, installed the Java update, restarted, and ...
0
votes
0answers
168 views
Mountain Lion usb power on standby
I connect my iphone to the macbook pro overnight to sync and charge it - since Mountain Lion, when the macbook goes into standby, the charging stops, and the battery drains. Is there a way to resort ...
7
votes
3answers
4k views
Can i use my old MacBook charger on my new Mac?
I have a 2011 15" MBP, that uses a 85W power supply.
My old 2008 MBP 15" also has a 85W power supply, but I cannot get it to work. Shouldnt it? Its the same watt power, and the adapter fits.
1
vote
1answer
528 views
iMac sounds like it's starting up then shutting down immediately
I have an iMac. Since yesterday, it has been making sounds where it seems like a hard drive is starting up then shutting down immediately. However, that can't be possible of course because the ...
0
votes
1answer
337 views
Is grounding important?
Is the grounding wire forwarded to the Magsafe connector? There are these 2/3 pin adapters and it's so much easier to convert a 2 prong connector while travelling than the bulky three prong ones. I do ...
5
votes
1answer
707 views
Are the mid-2012 Macbook Air compatible with older MagSafe adapters?
Will the mid-2012 Macbook Air models be compatible with the MagSafe power supply of the previous generations?
2
votes
1answer
186 views
Can I use a foreign power cord to power my MacBook?
I have a MacBook Pro computer and I will be traveling abroad to Hong Kong for studies. The electric sockets and voltage are different than here in the US so I would have to use a converter but it is a ...
3
votes
1answer
72 views
Energy saver: do the battery settings apply during charging?
I have my Macbook pro 17 (early 2011, OSX 10.6.8) set to turn off the display at 30 minutes on AC, and 10 minutes on battery.
I've noticed recently that if the battery is charging (the little battery ...
0
votes
1answer
264 views
Old MacBook power adapter on new MacBook Pro?
I have a 60W power adapter from my old 2008 MacBook.
Can I use this power adapter on a new 13" MacBook Pro, which also came with a 60W power adapter?
However the two power adapters have two ...
5
votes
3answers
5k views
What is the iPhone's standby policy regarding WiFi and 3G?
I have an iPhone 4s with the latest iOS.
It seems that when I wake it up from standby, it switches from 3G (or EDGE) to WiFi. Judging from that, I suspect it turns off WiFi when in standby, and only ...
4
votes
1answer
283 views
At what point do iPads stop displaying “not charging” when connected to power?
I am curious if anyone has measured directly or found an authoritative reference that documents at which point the various iPad will display charging and not "not charging" in the menu bar while ...
6
votes
3answers
750 views
Using my iMac in a country with a different power supply standard
We may be relocating to a different area of the world where the power standards and outlets differ considerably from what I've got here in North America.
Is the power supply in my iMac ...
6
votes
4answers
3k views
Does an iPad consume more battery power when there are multiple applications open?
Does an iPad consume more battery power when there are multiple applications open compared to let's say, having only one application resident in memory?
If there are differences between the ...
2
votes
2answers
2k views
Does having Bluetooth enabled draw extra power when no devices are connected?
I generally turn off Bluetooth on my Macs and iOS devices when I'm not actively using a Bluetooth device. My assumption is that this saves battery life, but I realize that I have no fact to back that ...
2
votes
1answer
5k 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 ...
1
vote
2answers
974 views
What is the wattage of my iPhone?
I am trying to make a transportable charger for iPhones, but before I can start this I need to know how much power my iPhone uses when I make an emergency call.
If nobody knows this, I will be glad ...
1
vote
1answer
368 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?
