If I always have my MB Pro plugged into the power adapter. . . .

If I always have my MB Pro plugged into the power adapter, will my battery still wear out as it would if I were depleting and recharging it daily?
I tend to find a power outlet anywhere that I go in order to run my MB Pro on the adapter rather than using battery power. It's a habit that formed while using my 6 year old Powerbook G4 with about 5 minutes of battery life per full charge.
I understand that it shouldn't wear out to the same extent as running the battery down constantly, but is there still a significant effect?
Does the adapter bypass a full battery and power the computer directly?
I feel like an idiot asking this question, but I am really curious.
Thanks in advance for your responses.

Various yes and no takes on it:
[http://news.tigerdirect.com/2008/02/08/fact-or-fiction-leaving-your-laptop-plug ged-in-all-the-time-will-harm-your-battery>
[http://forum.digital-digest.com/showthread.php?t=83889]
The official Apple stance (which I take to be a "don't" leave it always plugged in):
http://www.apple.com/batteries/notebooks.html
However, still more takes on the issue:
http://discussions.apple.com/thread.jspa?messageID=9867559
[http://www.google.com/search?q=leavelaptop+plugged+in+permanentlysite:apple.com]
Message was edited by: Limnos

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Problem description:
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EtreCheck version: 2.0.11 (98)
Report generated November 6, 2014 at 1:58:37 PM CST
Hardware Information: ℹ️
MacBook Air (13-inch, Mid 2013) (Verified)
MacBook Air - model: MacBookAir6,2
1 1.3 GHz Intel Core i5 CPU: 2-core
4 GB RAM Not upgradeable
BANK 0/DIMM0
2 GB DDR3 1600 MHz ok
BANK 1/DIMM0
2 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n/ac
Video Information: ℹ️
Intel HD Graphics 5000 -
Color LCD 1440 x 900
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 0:23:26
Disk Information: ℹ️
APPLE SSD SM0128F disk0 : (121.33 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Untitled (disk1) / [Startup]: 120.10 GB (87.15 GB free)
Core Storage: disk0s2 120.47 GB Online
USB Information: ℹ️
Apple Internal Memory Card Reader
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Configuration files: ℹ️
/etc/hosts - Count: 5
Gatekeeper: ℹ️
Mac App Store and identified developers
Launch Agents: ℹ️
[running] com.kodak.BonjourAgent.plist Support
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.bombich.ccc.plist Support
[running] com.JavaW.plist Support
[loaded] com.microsoft.office.licensing.helper.plist Support
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None
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SharePointBrowserPlugin: Version: 14.4.4 - SDK 10.6 Support
FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support
Flash Player: Version: 15.0.0.189 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.3
Default Browser: Version: 600 - SDK 10.10
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WebEx64: Version: 1.0 - SDK 10.6 Support
Safari Extensions: ℹ️
Omnibar
Searchme
3rd Party Preference Panes: ℹ️
Flash Player Support
Time Machine: ℹ️
Auto backup: YES
Volumes being backed up:
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Total size: 499.75 GB
Total number of backups: 11
Oldest backup: 2014-08-19 18:08:04 +0000
Last backup: 2014-11-06 18:51:38 +0000
Size of backup disk: Excellent
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      0% sysmond
      0% AppleSpell
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Top Processes by Memory: ℹ️
82 MB Finder
60 MB Messages
60 MB WindowServer
47 MB Safari
43 MB mds_stores
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MacBook Air - model: MacBookAir6,2
1 1.3 GHz Intel Core i5 CPU: 2-core
4 GB RAM Not upgradeable
BANK 0/DIMM0
2 GB DDR3 1600 MHz ok
BANK 1/DIMM0
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Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n/ac
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Intel HD Graphics 5000 -
Color LCD 1440 x 900
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 0:8:24
Disk Information: ℹ️
APPLE SSD SM0128F disk0 : (121.33 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Untitled (disk1) / [Startup]: 120.10 GB (109.93 GB free)
Core Storage: disk0s2 120.47 GB Online
USB Information: ℹ️
Apple Internal Memory Card Reader
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information: ℹ️
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Apple Inc. Thunderbolt to Gigabit Ethernet Adapter
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Mac App Store and identified developers
User Login Items: ℹ️
None
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Default Browser: Version: 600 - SDK 10.10
QuickTime Plugin: Version: 7.7.3
3rd Party Preference Panes: ℹ️
None
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Skip System Files: NO
Auto backup: YES
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444 MB Inactive RAM
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As Kalt mentioned please stop using it immediately.
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My MacBook Air won't turn on, despite being fully charged, and plugged into the power jack. What should I try?

I double checked the power connection, it's good. The charge light is green, so it should be charged and turn on, right? When I push the power button--nothing no startup sounds, nothing on the screen, keys don't light up. It's completely dead, as if it is powered off. I don't know if this could be having an effect on it...I upgraded to the latest operating system (Yosemite) a couple of days ago. After that, it wouldn't recognized our Epson WIFI printer. The printer was visible as an option under print, but when selected there was a message saying it wasn't connected. Even after going through the steps to add it agaiIn, after printing one document, then trying to print the next, the "printer was not connected" again. I gave up and shut it down for the day. Used it last night without any issues (except for being unable to print.). Now, this morning, nothing.

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Howdy,
I'm having a devil of a time with my Powerbook. It won't recognize a power adapter.
It won't charge my battery.
Won't run when plugged into the power adapter.
The only way it works is for me to charge my battery in my girlfriend's Powerbook and then sprint through any work I try to get done.
I've replaced the PRAM with twice. (one i bought and the other I took from my girlfriend's which I 100% know to work) It didn't make a difference.
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Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
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Wake On Clamshell Open: Yes
Wake On LAN: Yes
Wake On Modem Ring: Yes
Display Sleep Uses Dim: Yes
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Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 1
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On Modem Ring: No
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Reduce Brightness: Yes
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First low level warning: No
Full Charge Capacity (mAh): 3734
Remaining Capacity (mAh): 3374
Amperage (mA): -1231
Voltage (mV): 11770
Cycle Count: 235
AC Charger Information:
AC Charger (Watts): 0
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UPS Installed: No
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Welcome to the Apple discussions.
There's only 4 components in the charging circuit: power adapter, DC-in card, battery, and logic board. Do you know for a fact that your power adapter is working? If yes, then not running on the power adapter says either the DC-in card is bad (the card that has the jacks on the left side of the computer) or it's a logic board issue. Is the female jack where you plug the power adapter in visibly damaged, loose, or the case around the socket damaged? If the socket is wiggly loose, likely a new DC-in card is in order. Does the power adapter light up at all when you plug it in?
We had a similar, but not exact, situation recently on one of our Powerbooks, and ended up taking it to the Apple store, where they sent it to the Apple depot for repair. They replaced the logic board and put a new battery in. The Depot service returns the machine with anything needing repair, repaired. If everything is in good physical order, ie the case isn't damaged, it costs around $325, which is less than getting a new logic board put in at the store. If the case is damaged, a trip to the Apple depot costs more. A new DC-in card card + installation by Apple runs around $130, give or take. Used DC-in cards run around $75-$95 if you want to install it yourself.

If my laptop battery dies for good, can I still have my laptop work while plugged into the wall?

It's a Toshiba Satellite laptop, made this year, Windows vista, yadda yadda. Look my point is, if my battery gets wasted to a point where it won't charge anymore, will my computer still work plugged into the wall? I can't afford to get another battery. I can't afford a pack of cigarettes.
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H,
This is the HP Global English forum not theToshiba Support Forum. We support HP PC products.
The answer to your question about externally powering your notebook PC is yes.
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****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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I actually just got a replacement rMBP as the other one had a small scratch on the body. So both the charger and the rMBP that was atached at the time of the pop, will be returned in a few days anyway. Still I am a little alarmed by it all. The charger was plugged into a 6-way extension adapter with surge protection, so I don't think it was a power surge. And anyway my tv (also plugged into the socket adapter) was on at the time and there was no problem there. Can I assume it was just a fault in the adapter? I will tell them about it of course when I call up tomorrow to arrange the return. I just hope the same isn't going to happen with the new rMBP and charger!
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Apple's warranty IS international. You have a one-year warranty when you buy the machine and you can extend that - and your phone support - to three years by purchasing the AppleCare Protection Plan, which is international as well.
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If I always have my MB Pro plugged into the power adapter. . . .

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