When should I use the power adapter?

I just installed a wireless router. Should I use the power adapter when I'm not going to use the Macbook for several hours? Does the Macbook drain the battery when it is shut down or sleeping?

When should I use the power adapter?
Whenever you are near a power outlet. Not 100% of the time, of course (you have to flex the battery sometimes) but as often as possible.
Should I use the power adapter when I'm not going to use the Macbook for several hours?
If you are near an outlet, yes.
Does the Macbook drain the battery when it is shut down or sleeping?
When sleeping, it drains a negligible amount.
Further reading:
http://support.apple.com/kb/HT1446
http://support.apple.com/kb/HT1490

Similar Messages

Noise on audio output when using the power adapter

I'm a musician and use my mid-2007 MBP 15" in my live rig. When I use the power adapter, I hear a buzz, sometimes accompanied by a slightly louder buzz that cycles on & off about 1x/second. There are a few weird things going on here:
1. The buzz does not happen all the time. That leads me to think it may be noise in the AC line that the adapter is plugged into.
2. The noise is heard when I use both the built-in audio output AND an external USB audio interface.
In any case, when I disconnect the power adapter and run my MBP on battery, the noise goes away completely. I can probably do this on most gigs, but I'm a little nervous since I run a FW drive, an external USB audio interface, and my midi keyboard (powered by USB) so I am putting a little heavier than usual load on the MBP's battery.
As I said, this may be a noisy AC line. Another guess is that it's the PMU inducing noise into the audio circuitry. I'm hoping a simple AC line filter can help me but I thought I would ask here first in case anyone else has dealt with this. TIA for any help!

I had a similar problem and fixed it with a $5 universal travel adapter. Yours might be different but here's my situation. Try it for little cost and see if it works.
I'm also a muso with an iMac running external KRK speakers via USB Mbox2. Previously I had a Macbook Pro and the same audio problem. I've been putting up with a very low volume, high pitch noise until now. I simply plugged the Mac power cord into a universal travel adapter which then goes into the wall. For Aussie users there is an adapter on ebay that will allow a 3 pin Aussie plug to go into female side and has a two pin Aussie male on the other. For US users you can probably get the same although there is a 59c product that will do the trick called a ground lift adapter. Applecare actually agreed this was the best fix and confirmed there would be no problems with power supply or Mac performance. What a gem ! God knows I've looked into all kinds of alternatives that could have cost hundreds instead of $5.

Is it safe to use the power adapter without the grounding pin?

Is it safe to use the power adapter without the grounding pin?
Last time I unplugged my power adapter the grounding pin stayed in the wall socket. Is it safe to use it with just the 2 prongs?

Is it safe to use the power adapter without the grounding pin?
No. If a short circuit occurs, it may cause the case of the computer or other device to build up an electric charge. The grounding pin absorbs any charges generated this way; without it, someone touching the device may get shocked.
(52105)

When Should I use the Inner Classes ?

When Should I use the Inner Classes ?
What is the advantage(s) and the disadvantage(s) ?

When I use innerclasses?
1) Allmost allways when I need simple owner child behavior.
2) When I need a behaviour, that is quite small, and used only once, I make it anonymous inner class. For example specialised streams and threads.
3) Enumerations

All of a sudden even using the power adapter its only at 57% after 8 hours

I have my powerbook 1.67ghz, its plugged in and i have a couple of adapters so i dont think it is the power adapter.
it has been plugged in and only records 57% power. What does anyone think? it fluctuates between GREEN and AMBER light on the power adapter.
On the back of the computer itself i see some green lights but i dont know what they mean.
here are some of my stats: It says its NOT charging and its plugged in
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 3888
Remaining Capacity (mAh): 2228
Amperage (mA): 0
Voltage (mV): 11798
Cycle Count: 33
AC Charger Information:
AC Charger (Watts): 50
Connected: Yes
Charging: No
please help
thanks
scott

Hi, Scott.
yes i am using the 65 watt power adapter...
Not when you ran System Profiler and got the results you quoted above, you weren't — at least not if System Profiler can be believed. Set the 50W adapter aside and don't use it with the Powerbook. If your alleged 65W adapter is identified by SP as a 50W adapter, it needs to be replaced with a proper one.
If you "really never use it unplugged," that may explain why your Powerbook is misbehaving. Powerbook batteries want to be used. If you don't completely discharge and recharge your battery every two to four weeks, its charge-level calibration will become very inaccurate, and it may lose capacity faster than it should.
http://www.apple.com/batteries/notebooks.html
http://support.apple.com/kb/HT1490
If the plug on the 65W adapter fits your iBook (i.e., if it's an iBook G4 rather than a G3), test the 65W adapter to make sure it charges the iBook battery properly. (This will do neither the adapter nor the iBook any harm.) If it does, it's almost certainly not at fault. The other three components of the Powerbook's charging system are the battery, the logic board, and the DC-in/Sound card. Plug the 65W adapter into a wall socket that you know is reliable and not switched. Reset your Powerbook's Power Management Unit, following the instructions in this article for your particular model. Connect the adapter to the Powerbook and let it charge for twelve hours without turning it on. Post back to let us know the results.
Other questions:
How old is your battery?
Was this battery supplied to you under Apple's replacement program for original PB batteries within a certain serial-number range? Many of the replacement batteries issued under that program seem to have been defective. They lose capacity very rapidly and prematurely (which yours hasn't done) and/or they refuse to charge even when they appear to be in good health (which yours may be doing). If your battery was supplied under the replacement program, it falls under greater suspicion.
Message was edited by: eww

Can I control filenaming when archiving files using the file adapter?

Hi folks,
Is there anyway to control the filename used when the File Adapter writes out to an archive?
Second question, I also need to be able to pass a "filename" to the adapter from an "input file." Is there a way to do this in the file adapter?
Sincerely,
lpac

Hi,
I have done that with the ftp adapter. In the .xsl file I wrote the following after the <xsl:stylesheet version="1.0" ....> tag:
<xsl:variable name="INFILENAME" select="ehdr:getRequestHeader('/fhdr:InboundFTPHeaderType/fhdr:fileName','fhdr=http://xmlns.oracle.com/pcbpel/adapter/ftp/;')"/>
<xsl:template match="/">
<xsl:variable name="OUTFILENAME"
select="ehdr:setOutboundHeader('/fhdr:OutboundFileHeaderType/fhdr:fileName', $INFILENAME, 'fhdr=http://xmlns.oracle.com/pcbpel/adapter/file/;')"/>
<opaque:opaqueElement>
<xsl:value-of select="/opaque:opaqueElement"/>
</opaque:opaqueElement>
</xsl:template>
</xsl:stylesheet>
To use this with the file adapter, you would have to wirte file where is written ftp.
Hope this helps,
Zaloa

When should I use the .resetDRMVouchers() API?

[ Background ]
DRMManager.resetDRMVouchers() (and the corresponding APIs on iOS and Android) will reset the DRM license store on the client device. It does this by renaming the license store and notifying Adobe Access DRM to perform an individualization the next time protected content is played. On the next playback of content, a new license store directory is created and all new licenses will go into that store. The previous license store is never used again.
Sometimes, it is necessary to perform a .resetDRMVouchers() if the client device has reached a state where Adobe Access DRM can no longer function properly. For instance, if the license store has become corrupt, the device can no longer access existing licenses or store new licenses - they are stuck unless they use annother Browser or App, which would use another license store.
[ How to properly call .resetDRMVouchers() ]
Below is an Actionscript code snippet. The exact same workflow applies to iOS and Android:
import flash.net.drm.*;
private function onDRMErrorEvent(event:DRMErrorEvent) : void {
    if(event.errorID == 3322 || event.errorID == 3346){
        try {
            DRMManager.getDRMManager().resetDRMVouchers();
            // you may want to display 'please reload the page or restart the browser' message.
        catch(e:Error)
            // most likely in older version of flash player where resetDRMVouchers is not allowed.
[ Which error codes indicate the client is disabled and requires a DRM Reset? ]
The following error codes require a DRM Reset in order to recover a client that can no longer play Adobe Access DRM content:
DRM Error Event
Description
3322 - Device Binding Failed
The underlying hardware attributes of the device has changed so much (likely by a hardware upgrade) that Adobe Access does not recognize this machine to be the same machine it was before. Adobe Access treats this as a "copy and paste" attack where one device copies licenses to a different device in an attempt to share their DRM'd content; playback is denied.
The device can recover by re-installing their previous hardware. If that is not desired/possible, a DRM reset will re-initialize Adobe Access to set the current device attributes as the baseline. However, doing this removes access to all previous licenses stored on disk.
3323 - Corrupt Global State Store
The license store has become corrupt and can no longer be accessed until a reset is performed.
3326 - Store Tampering Detected
The license store has been tampered, causing the signature check to fail. The store can no longer be used and a reset must be performed to create a new store.
3346 - License Migration Failed
When upgrading to a newer version of Adobe Access or Flash Player, all previous licenses are migrated to the new license store. If migration fails, the old store is corrupt and must be reset so that the next individualization attempt will not attempt to migrate your previous license store.
[ How to manually perform a reset DRM ]
Please refer to this forum posting: http://forums.adobe.com/message/3051713#3051713

Kanan, the difference you already know, blade .vs rack mount. There are some CPU differences, but not much. Both can be managed by UCSM in version 1.4.x
So it really is ones preference on what you are using it for and how scalable you want things to be for future expansion.
Blades: easy, as you can buy a chassis and have 2 blades in that one chassis and add blades as needed. If using boot from San, can get a server back up in minutes
Rack mount: can take rack space more quickly, takes time to duplicate in case of a failed server
Very small differences, but hope this helps to start the wheels turning.
Good Luck!
Sent from Cisco Technical Support iPhone App

When using my power adapter, the light is green for a two seconds and turns red.

When using the power adapter for my MacBook 2.1, the little light on the connector is green for 2 or 3 seconds and then turns red. I bought a new adapter, but it is the same thing. It looks like the computer is charging. What's wrong with it.

Nothing wrong. Here is what Macbook manual has to say:
When you first connect the power adapter to your computer, an indicator light on the
power adapter plug starts to glow. An amber light indicates that power is going to the
battery. A green light indicates that no power is going to the battery, which can mean
the battery is fully charged, is not installed, or has a problem. If you don’t see a light,
your plug probably isn’t seated correctly. Check for any debris and remove it. You can
monitor the battery level using the Battery status menu in the menu bar or by
checking the battery level indicator lights on the bottom of the battery (see page 74).

Using Alu Power Adapter with The new MBP Unibody 2009 ? (Both 85 Watts)

Hi,
Can i use the Power Adapter off my Aluminium MBP 2.5 GHz,15" intel core 2 Duo (MacBookPro4,1), with the new Unibody 15" 2.66 GHz(MacBookPro5,1)?
They are both 85 Watts.
The Power adapter for Aluminium is :
Input : 100-240V - 1,5A 50-60Hz
Output : 16,5-18,5V, 4,6 A Max
Delta Eletronic
The Power Adapter for Unibody is :
Input : 100-240V - 1,5A 50-60Hz
Output : 18,5V 4,6A, 16,5V, 3,6A
LiteOn Technology
Thanks for The Lights.

That's correct, I meant to type 85W.
Can anyone advise what the impact will be of using older 85W adapters with the new MBP's that come with a 60W adapter?
Is there a shorter battery life in the long-term, or is the new battery designed to cope the same with either of these power adapters?

OK to use iPod Power Adapter to charge iPhone?

At the Apple Store, they told me that I could use a power adapter and cable for an iPod with my iPhone. Seems to work fine, charges the battery fine. But I notice that in the tiny print on the side of the iPod power adapter it says, "Output 12V -- .67A". The print on the side of the adapter that came with the iPhone says "Output 5V -- 1A".
Wouldn't want to fry my phone battery with those extra volts.

It's not $29.99 + $19.99. They include with the iPhone both a dock/charger and a power adapter/wall plug charger. But only one cable between either of them and your iPhone. So, if you have a computer in one room and you charge your phone overnight in another room, you need another cable.
One solution is to to use some cable you already have, that fits, such as I did once, from an iPod 2 or 3 years old. But I had to use the power adapter that came with that cable/iPod, since the USB cable end was different. It said output: 12V. the iphone power adapter said output: 5V.
So, although the cable fit and the iPhone charged seemingly fine, I was not comfortable charging my $600 iphone with a 12v charger when the one that came with it was a 5v charger. I paid just $19.99 for a duplicate cable to the one that came with the iPhone, used the 5v power adapter that also came with it. Just in case. The apple guy at the "genius bar" agreed: it "ought to work" but, yeah...it's disconcerting...
So, that's the story. I now have a dock on my iMac and a power-adapter from the wall in my bedroom. Both supplied with the iPhone. Both using identicl cables.
What I would like to know, from some tech person, is YEA or NAY. The 5v and 12v iphone and ipod adapters are interchangeable OR they are not and WHY. Otherwise, we are all just speculating.
8gb iPhone Mac OS X (10.4.6)
Mac OS X (10.4.6)

What is the necessity of the AC power cord (with Mac Book Air)? When should it be used with the power adapter?

what is the necessity of the AC power cord (with the Mac book Air)? when should it be used?

Gary, you wouldn't believe some of the questions people ask on this site.
Why are both cords necessary?
They are not.
Other than the two reasons dominic23 sited are there any other reasons to use the AC power cord rather than the power adapter cord alone?
No.

When charging and using, ipad 2 is 100% battery, does ipad use the power from the power adapter or from the battery?

I have a quention, when i am charging and using my ipad 2 at the same time, if the battery of ipad is fully 100%, does ipad use the power to work from the power adapter only or from the battery only or both? Thanks!

YOu don't have to have your receipt. Apple should have a record of how long you've had the device. If you bought it in april 2012, then your 1 year warranty against manufacturer's defects is almost up. You should find your local apple store, make an appointment and take it in.

How smart is my mac? can use the AC adapter as a main power source and not charge the battery when its fully charged?

does my mac use the AC adapter as the power source when its plugged in and the battery is full? is it smart to enough to split?

The charging circuit charges until the battery reaches 100%, then shuts down the charging and goes to powering mode. When the battery charge trickles down to 93-95% the charging circuit starts again and tops up the battery. Will continue to operate like that if you leave it plugged in. Keeping it plugged in does not harm the battery or risk overcharging.

HT4101 When I connect using the USB version I get a message on the ipad saying "the attached accessory uses too much power. What can I do?

Ipad2 Camera Connection Kit
When I connect using the USB option I get a screen on the ipad which says "Accessory Unavailable. The attached accessory uses too much power"
What should I do please?
David

I believe your camera uses a micro SD card. The CCK accepts the full size SD card. Do you have a SD card adapter to plug the micro into?
 Cheers, Tom

Hone turned off . i tried several times to turn it on but i doesnt work even by using the power and the home button. what should i do ?

ive got the iphone 5s 4 weeks ago.today the screen turned blue and the phone turned off . i tried several times to turn it on but i doesnt work even by using the power and the home button. what should i do ?

Hi vanessato,
Thanks for visiting Apple Support Communities.
I recommend these troubleshooting steps if your iPhone does not turn on.
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Will not turn on, will not turn on unless connected to power, or unexpected power off
Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
After at least 30 minutes, if:
The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen . Then unplug the phone from power. If it immediately turns off, seek service.
The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
If the display turns on, go to step 4.
If the display remains black, go to next step.
Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
Best,
Jeremy

When should I use the power adapter?

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