MBA 2013 How Do You Stop The Battery From Charging At Certain Percentage?

Discussion in 'MacBook Air' started by ELYEN01, Aug 27, 2013.

  1. ELYEN01, Aug 27, 2013
    Last edited: Aug 28, 2013

    ELYEN01 macrumors newbie

    Feb 18, 2013
    Is there anyway to stop the battery from charging that certain percentage? Let say stop at around 80%? Or if there is any software that can do that?

    The reason I ask is because I am aware that the Samsung laptops have the ability to stop charging at 80%, Lenovo stops charging at 60%, and Sony stops charging at 80%. This is to prolong the battery life according to their recommendation.
  2. rabidz7 macrumors 65816


    Jun 24, 2012
  3. maflynn Moderator


    Staff Member

    May 3, 2009
    Nope, and personally, I'd not worry about it. Just enjoy your computer.
  4. DisplacedMic macrumors 65816

    May 1, 2009
    unplug it.:p
    you really don't need to worry about this.
  5. robvas macrumors 68030

    Mar 29, 2009
    Apple has the machine stop in the upper 90's. They know what they are doing ;)
  6. Mrbobb macrumors 601

    Aug 27, 2012

    REALLY... oh well learn new things everyday. :p
  7. magbarn macrumors 68000

    Oct 25, 2008
    Yup, research shows lithium batteries like to be only charged up to 80% capacity and only drained to about 20%. This gives you the highest number of charge/discharge cycles. They also like to be stored around 50% or so, not 100% and certainly not 0%. Majority of hybrid cars will keep their batteries in the 20-80% range for max longevity.
  8. Mrbobb macrumors 601

    Aug 27, 2012
    I vividly recall my old Sony LION would last 400 cycles, the new LIONs however last 1,000 cycles(?) :D and by reading some of the battery techs and Lithium deposits around the world and 787's Troubles Lithium formulation etc I see there is not ONE LION but a few LION formulations.

    The problem is, the vendors don't tell us exactly what LION formulation are they using, and it applies to batteries made between what date and what date? (vendors switch suppliers right).

    So I take these with a few grains of salt. But OK, 80% efficiency it is, so when buying a new laptop and they say lasts 7 hours, so people re-calculate your expectations, your laptop is only gonna go for 7x80% hours.
  9. magbarn macrumors 68000

    Oct 25, 2008
    Mistreat your MacBooks battery and you'll lose more than 20% of battery life in significantly less than 1000 charge/discharge cycles. Case in point, buddy has a 2012 cMBP that has been constantly been plugged into the wall for the last year at a constant 99-100% charge so the battery has < 10 cycles, but the battery life has already dropped by 8% or so. My rMBP 15 has over 60 cycles and is about the same age still has 100% battery capacity.
  10. Mrbobb macrumors 601

    Aug 27, 2012
    Got it.

    That's one change I've made. Used to leave it plugged in all the time, now When it's 100% and am ready for bed, I unplug it. Apple made it easy with a magnetic plug. Lazyman here.

    But the other stuff... is OK, I make enough. :)
  11. Saturn1217 macrumors 6502a

    Apr 28, 2008
    This would actually be quite wonderful.

    Back when I had a netbook with a removable battery I would remove the battery when I was doing long work sessions while plugged in (on a netbook yes I know...). It prevented the battery from going through tons of charge cycles every time I plugged back in.

    Now that removable batteries are a thing of the past it would be nice to be able to plug in my MBA (which has such a ridiculous battery life I'll rarely use it all at once) without constantly initiating a partial recharge cycle. I often find myself in a situation where I delay plugging back in even though I'm at my desk right next to the charger because I only used like 5% of my battery and I don't want to constantly be going back and forth between 95% and 100%. I'd love to just save that 95% and use the charger but I don't have that choice. I have to either keep wasting battery I don't need at the moment or go back up to 100% and use up my battery's finite amount of cycles.

    I imagine over the life of a computer a feature like this would significantly prolong battery life span. But it is probably too complicated for Apple to ever implement...:(
  12. TheRealDamager macrumors 65816

    Jan 5, 2011
    I think the reason Apple doesn't implement a feature like this is because for 99% of users it won't make any difference. The battery is supposed to retain 80% of it's capacity after 1000 charges - thats a long time. Most people frankly don't keep a laptop for more than 3 years or so before they upgrade, and even if you want to hold on to your Air for 10 years, you can always get the battery replaced for a reasonable fee. It's just not worth worrying about charging cycles anymore.
  13. GGJstudios macrumors Westmere


    May 16, 2008
    There is no option for that, and there is no need for that. Apple's charging technology is quite efficient. Run on battery whenever you need to and plug it in whenever you can. You can plug or unplug any time you need to, regardless of the charged percentage, and you never need to completely drain your battery. Just make sure you don't run on AC power exclusively, as your battery needs to be used regularly to stay healthy.
    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.

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