Results 1 to 15 of 15
  1. #1


    Member Since
    Dec 16, 2009
    Location
    Near Brockville, Ontario, right on the St. Lawrence river
    Posts
    10
    Specs:
    macbook pro 13" 4 gig's
    Using the MacBook plugged in
    If i'm sitting at my desk, can I use the MacBook plugged in? I know the video for the battery says it is okay to plug it in anytime, the tech who set our Mac's up said it is prolly better to let them drain...so who is right here?

  2. #2

    ZorroAMG's Avatar
    Member Since
    Oct 23, 2005
    Location
    Vancouver Canada
    Posts
    522
    Specs:
    | '09 24" iMac 3.06 8GB | '09 iPhone 3GS 32GB | '09 ATV 1.16TB | '07 23" ACD | '06 15" MBP |
    plug it in, charge it up, un-plug it let it drain, rinse and repeat.

  3. #3

    CrimsonRequiem's Avatar
    Member Since
    Jul 24, 2008
    Posts
    6,004
    Specs:
    MBP 2.3 Ghz 4GB RAM 860 GB SSD, iMac 3.4 GHz Intel Core i7 32GB RAM, Fusion Drive 1TB
    I keep mine plugged in when I'm using it. When I leave the house or am at school I use it on batteries.

    Drain the battery at least once a month is pretty much the regiment that I have been doing for my MB. It's been a little over a year and my battery health is at 95% @ 158 Cycles.
    死神はリンゴしか食べない。

  4. #4

    clayneal's Avatar
    Member Since
    Mar 27, 2009
    Location
    Lincoln Nebraska
    Posts
    2,146
    Specs:
    late 08 macbook 2.0 4gig 320hdd10.7.3 32 gig iPhone 4s
    here is what apple has to say on the issue:
    Apple - Batteries - Notebooks

    Hope this helps
    Clay
    MY ADVICE COMES WITH A DOUBLE YOUR MONEY BACK GUARANTEE!

  5. #5


    Member Since
    Jan 03, 2010
    Posts
    23
    Specs:
    Unibody MacBook 2GB RAM 500GB HD
    I've gotta say, when apple said battery lasts for 7 hours, was that a ballpark figure or what? I got my MB the other day and the battery doesn't last longer than 3 hours, maybe 4.

  6. #6

    Hi Tek's Avatar
    Member Since
    Dec 25, 2009
    Location
    Canada, NS
    Posts
    71
    Specs:
    15" MacBook Pro (OS X Leopard 10.5.8), Intel Core 2 Duo (2.53Ghz), 4GB RAM, 7200RPM/250GB HDD
    Quote Originally Posted by smackwarm View Post
    I've gotta say, when apple said battery lasts for 7 hours, was that a ballpark figure or what? I got my MB the other day and the battery doesn't last longer than 3 hours, maybe 4.
    I second that. Its not really a big deal for me because I never have my Mac away from my charger long enough for it to matter, but my Mac last id say for about 4 n half hours until low battery msg appears.
    “All things must come to an end, it is an inevitable part of the cycle of existence, all things must conclude”

    -Unknown

  7. #7


    Member Since
    Dec 28, 2009
    Posts
    396
    Specs:
    Macbook Unibody 2.26 Dual, 2GB RAM, 250 GB HDD
    It depends. When I dim the screen to a reasonable level, mine lasts about 7 hours indeed. If Airport is off too, it is even longer. With wireless on and screen at full brightness, it says about 4 hours or 5.

  8. #8

    FasterPussyCat's Avatar
    Member Since
    Nov 07, 2009
    Posts
    164
    Specs:
    MacBook 10.6.2 (2.4 Ghz) | Time Capsule 500GB
    Quote Originally Posted by smackwarm View Post
    I've gotta say, when apple said battery lasts for 7 hours, was that a ballpark figure or what? I got my MB the other day and the battery doesn't last longer than 3 hours, maybe 4.
    That would be 7 hours idling. If you use it, it will be less. Same with any other computer

    Same conversation here http://www.mac-forums.com/forums/swi...-charging.html

  9. #9


    Member Since
    Jan 03, 2010
    Posts
    23
    Specs:
    Unibody MacBook 2GB RAM 500GB HD
    Ah okay. 7 hours idle makes much more sense. Thanks

  10. #10


    Member Since
    Jan 22, 2010
    Posts
    1
    So my question is does the MBP still use the battery even when its plugged in?
    Does using the MBP while plugged in count as a charge cycle because I think it does with the iPod. Even when it is plugged in it goes through the battery. Does that happen with the MBP too?

    Thanks

  11. #11

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
    Posts
    26,485
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Quote Originally Posted by emon878 View Post
    So my question is does the MBP still use the battery even when its plugged in?
    Does using the MBP while plugged in count as a charge cycle because I think it does with the iPod. Even when it is plugged in it goes through the battery. Does that happen with the MBP too?

    Thanks
    Yes, it still uses the battery depending on what you are doing.

    No, it does not count charge cycles that way.

    My wife has never used her MB (now 2 1/2 years old) on battery alone. It is always plugged in except when I borrow it. It currently has 14 cycles, Coconut battery indicates battery health at 104% and it has been calibrated exactly "one" time. The last time I used it, 3 months ago or so, the thing lasted over 4 hours.

    I take care of my battery as recommended, including calibrating once a month. 1st battery lasted me 18 months before it failed to keep me up and running longer than an hour. 2nd one is now down under 2 hours in about the same 18 month period. $100/18 months is <$6 a month. I say pretty darn cheap when you consider what it is we do with these batteries.

    I also say, quit freaking worrying about the darn batteries and use your computer the way you want to.

    We need to make one battery thread and dump every single one of these things into the bottomless pit.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  12. #12


    Member Since
    Apr 09, 2009
    Location
    Ithaca NY
    Posts
    2,073
    Specs:
    13 inch alMacBook 2GHz C2D 4G DDR3, 1.25GHz G4 eMac
    Leave it plugged in. Calibrate it monthly or bimonthly. Your tech who set it up is wrong.

    Sucks for you, Bob. I'm at 110 battery cycles after 10 months, and still get 3 and a half hours with brightness half way on my aluminum macbook, surfing the web with itunes and adium up and running. If I turn down my brightness and run just a browser, i can pull 5 or 6.

  13. #13

    MacInWin's Avatar
    Member Since
    Jul 07, 2008
    Location
    Winchester, VA
    Posts
    6,066
    Specs:
    2015 rMBP, 2008 iMac, iPhone 6, iPad mini, 13" MBP, AppleTV and two MacMinis
    NiCad and NiMH batteries needed that cycling periodically to avoid buildup of crystals in the battery that shortened the capacity (the so-called "memory" effect). However, LiIon and other Lithium based batteries don't like the deep cycles the NiCad needs. In fact, LiIon batteries like to be topped up! See this website for more information: Battery University. Note that the recalibration needs to be done every thirty cycles, not thirty days. And also note that even well-cared for Li batteries start to decay 2 years after manufacture.

  14. #14


    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    20,911
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    Personally, I did the "calibration" rather unintentionally after first getting my BlackBook 2.16GHz -- charged it all the way up, ran it all the way down, charged it all the way up again (ie a first "full cycle").

    Since then, I do not calibrate it at all, I rarely take it off the power, it rarely gets below 50&#37; battery on those few occasions where its on battery at all. It is still giving me exactly the same capacity and performance I got from it 2.5 years ago.

    So despite what Apple says, my experience is that calibration does not have to be done religiously, though I'm sure it's a good idea to do it periodically. What's much more important, in my view, is the number of cycles. In my experience as a former tech, batteries that are cycled a lot tend to die sooner, suggesting that there is some kind of cycle limit to the LiOn batteries so many of us have in our slightly older notebooks.

    Apple's own video on their new sealed batteries suggests they can be cycled up to 1000 times before losing serious capacity, and that this is up to 3x more than older (meaning most of ours) LiOn batteries. For the sake of argument, let's say that its really only 2x more -- that still means that someone who runs the battery mostly to empty each day and charges it up each night (say a student for example) should expect to be replacing batteries more often than I do.

    Just my experience on this topic.

    Cheers
    chas_m

    Evangelist, ACDSee Pro for Mac
    Get the beta!
    Join the community!
    Help us build the next great Mac photo manager!

  15. #15

    MYmacROX's Avatar
    Member Since
    Mar 17, 2009
    Posts
    3,625
    Specs:
    2008 15" MBP Yosemite, 2012 21.5" iMac Yosemite
    I wish I had known all this when I first got mine a yr and half ago. Didn't find out about calibrating the battery until 6 or 9 months into ownership. And even then I didn't know that keeping it plugged in all the time would help. I'd just charge it to 100&#37;, then use it until I got the low battery warning.
    Oh well, my battery probably lasts about 2 hrs now so I just plug it in all the time. I'll break down and order a new one after I get my tax rebate next month. *sigh*

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. macbook pro plugged in
    By DJ_GOSE in forum Apple Notebooks
    Replies: 10
    Last Post: 04-02-2011, 09:09 PM
  2. My Macbook only works when plugged in
    By hurley87 in forum Apple Notebooks
    Replies: 5
    Last Post: 07-30-2010, 09:26 PM
  3. MacBook - not turning on without being plugged in
    By kyakabi in forum Apple Notebooks
    Replies: 9
    Last Post: 02-03-2010, 05:41 PM
  4. MacBook only works when plugged in...
    By Zacariem in forum Apple Notebooks
    Replies: 9
    Last Post: 09-28-2007, 06:45 AM
  5. Macbook Plugged IN
    By thesam in forum Apple Notebooks
    Replies: 5
    Last Post: 03-04-2007, 11:08 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •