MacBook Pro 13" Battery Question

Discussion in 'MacBook Pro' started by AeroUK, Jun 20, 2009.

  1. AeroUK macrumors 6502

    Jan 6, 2008
    New York

    My new 13" Macbook Pro is getting 3-3.5 hours battery life.

    I have heard reports of people getting 5 or more hours! Does anyone know why this is?

    I have brightness turned down, bluetooth off and just doing light surfing on wifi.

  2. maflynn Moderator


    Staff Member

    May 3, 2009
    First calibrate the battery and then see if that fixes the problem. Its possible the computer is not correctly reporting how much juice the battery have and so it needs to be calibrated.
  3. captain-rossco macrumors member

    May 18, 2009
    Bristol, UK
    Sounds about right, I'm getting a lot more out of the battery than the battery lets on!

  4. cpnotebook80 macrumors 6502a

    Feb 4, 2007
    this is my first macbook and got it last evening and never plugged it in except to do the software update.and never plugged it after that. I shut it down last and this morning still shows 1.20 hrs left or so.
    pretty impressive.
    so to calibrate, do i run the battery down and then start a full charge?
  5. fixmdude macrumors member

    May 8, 2009

    A new rechargeable battery needs to be conditioned. Charge it for at least 14 hours regardless of what the meter says. Use it until it shuts down. Recharge it for an extended period again. Do that 3 or so times and the battery will then be conditioned so that it will last longer and you won't have to worry about running it down between charges any more, it can then be plugged in at any time without forming a short memory.

    My only question is, has anyone seen or done tests to compare the battery life of the base 13" MBP model with one having the optional faster processor? The faster processor would be nice to have when/as needed, if, the power saving options allow it to last as long when not using its full abilities. If just having the faster processor during normal tasks knocks 25 minutes off of the battery life then that would be good to know.
  6. AeroUK thread starter macrumors 6502

    Jan 6, 2008
    New York

    I did not know I was supposed to charge it that long! Why don't Apple document this?

    I shall drain the battery now and run it dead for 5 hrs, I shall then charge it all night and hopefully this will improve it. I have done a few recharges and only getting 3 hours at the moment!

  7. fixmdude macrumors member

    May 8, 2009

    I haven't read all of Apple documents, but every other rechargeable device I have received in the past, from Panasonic cordless phones to remote controls, all have instructions that say to charge the battery for 11, or 14, or 16, (time varies) hours before using it the first time. They don't talk about running it down and recharging it a few times to condition it, I found that info through research, and in trying it myself I found that it does extend the battery's life after the first 3 days of conditioning.

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