New MacBook - Should i let my battery drain fully or charge it all the way.

Discussion in 'MacBook' started by mikeray, Apr 27, 2015.

  1. mikeray macrumors regular

    Joined:
    Jan 17, 2006
    Location:
    Brooklyn, NY
    #1
    Just got my new MacBook. the Battery is at 70%. Does it matter whether I charge it now to full, or wait until it is fully drained to charge it?
     
  2. tillsbury macrumors 65816

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  3. Laserducky macrumors regular

    Laserducky

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    Dec 29, 2013
    #3
    I'm no expert but I've read in many places that its a good idea to not let your Mac fully discharge : plug in at 30% would be ideal ...and extend battery life ... :)
     
  4. vanimal macrumors 6502a

    Joined:
    Sep 12, 2014
    #4
    Charge it all the way out of the box, you can still use it while its charging. Than use it off the charger and let it get down to a low amount for the first time. Somewhere around 15%-20%. Charge her back up and try to get it on a charger before it drops below 50% from there on out if you can.

    Once a month roughly let it drop down to a low percent to allow the battery to get exercise if you have it plugged in a lot. Same thing, around 15%-20%-ish, just once a month.

    I have never had a battery fail on me, hell never had a battery in any macbook go below 90% health. This is how you exercise Lithium-ion batteries ;)
     
  5. lchlch macrumors 6502a

    Joined:
    Mar 12, 2015
    #5
    What I would do is pretty simple.

    Set the low battery warning at 20%.

    Than charge the laptop to full whenever I get warned.

    Then unplug.
     
  6. Newtons Apple Suspended

    Newtons Apple

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    Location:
    Jacksonville, Florida
    #6
    I would charge it when it came and keep it plugged in if power is available. Use it off battery when no power is available and forget the discharge crap.

    You want to avoid cycles to extend battery life. If you use your device all the time just charge it when you want and move on with more important things in life;)
     
  7. mattopotamus macrumors G5

    mattopotamus

    Joined:
    Jun 12, 2012
    #7
    This is really the best advice. If you can use it staying plugged in, do that. It will make the battery last as long as it possibly can. Otherwise, just use it!
     
  8. tecnho macrumors 6502

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    Apr 13, 2015
    #8

    I know there is a lot of back and forth on this subject, but as far as that specific technique goes, don't people advise against having it connected continuously while at 100%?
     
  9. southerndoc macrumors 65816

    southerndoc

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    USA
    #9
    How do you change the low battery warning?
     
  10. mattopotamus macrumors G5

    mattopotamus

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    Jun 12, 2012
    #10
    It actually is the best thing for the battery. If you keep it charged 24/7 apple recommends to let it drain once a month. It was bad for "old school" batteries.
     
  11. tecnho macrumors 6502

    Joined:
    Apr 13, 2015
    #11

    I am guessing you would need an app of some kind. Maybe "Low Battery Saver." Says it can provide an extra battery warning of your choosing on lifehacker

    ----------


    Ahhh that makes since, especially considering I am currently on a 2008, so that advice might have been stored subconsciously as I am most definitely on an "old school" battery. Thanks for clearing that up
     
  12. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #12
    No...
    Not if those people understand a little about how the charger operates.
    It stops charging when the battery is fully charged.
    If you choose to use your Macbook while it is still connected and fully charged, then do it - there's no tech reason to unplug.
    Same thing for idle, or sleeping. There's no particular advantage to unplugging at a full charge - it is your choice.
     
  13. Kayzer Soze macrumors newbie

    Joined:
    Apr 22, 2015
    #13
    from what ive read, you dont want to leave it plugged in and ideally you dont want to charge above 80%..... but im no expert and people seem to have differing opinions. will see if i can find the link to this theory

    EDIT:
    On the other hand, you can read articles online that;ll say:

    "When plugged in, the battery is not in use. The laptop’s power circuitry bypasses the battery unless it’s needed. Depending on how smart the charger is, it may occasionally poll and “top off” the battery if its charge decreases to a certain threshold below 100%, but this is rarely needed in practice."
     
  14. mattopotamus macrumors G5

    mattopotamus

    Joined:
    Jun 12, 2012
    #14
    That was more advice for old laptops. Think of all the people who use clamshell mode, the laptop has to be plugged in. I have been doing this for a few years and have never had a battery go bad on me :)
     
  15. lchlch macrumors 6502a

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    Mar 12, 2015
    #15
    What you're saying is true. But do you know that as you fill a battery, the more charge it has, more power is necessary to charge it, and that heats up the battery more.
     
  16. Newtons Apple Suspended

    Newtons Apple

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    #16
    All of these confusing answers, no wonder we keep getting new posts like these!:mad:
     
  17. DeltaMac macrumors 604

    DeltaMac

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    Jul 30, 2003
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    Delaware
    #17
    eh, yes? Are you trying to convince users that batteries should never be fully charged (heat is our enemy :D )
    In my experience, the temperature increases because of the charging process. It is consuming energy, which will be partly converted to heat. The charger will also heat up. Longer charging time equals more heat.
    When fully charged, the battery will cool back down, and the charger will also run somewhat cooler from that point, as it is no longer providing as much current.
     
  18. Newtons Apple Suspended

    Newtons Apple

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    #18
    If heat is the major enemy of the new MB battery it is doomed as with no fan to vent the heat, the case and batteries must get very warm.:(
     
  19. 212rikanmofo, Apr 28, 2015
    Last edited: Apr 28, 2015

    212rikanmofo macrumors 65816

    Joined:
    Jan 31, 2003
    #19
    Okay this topic is confusing me. I thought it was optimal to use it until the battery drains completely at 0% and charge it up back to 100% in order to keep the battery lasting longer?

    Now you guys are saying to use it while unplugged and let the battery drain down to about 15%-20% before charging it up again. So which one is it?

    I also heard that its also bad to use the computer plugged in while the battery is at 100%. Is this true? So that means I should never use my computer plugged when the battery level is at 100%?

    I am treating this laptop like a mobile device such as my iPad and iPhone. So does this mean the battery will last forever if we always use this thing while plugged in? That means preventing it from draining by plugging it in once it hits 15%-20%. That way it will never cycle.
     
  20. whiteonline macrumors 6502

    whiteonline

    Joined:
    Aug 19, 2011
    Location:
    California, USA
    #20
    New MacBook - Should i let my battery drain fully or charge it all the way.

    Ok to clarify things, and it's really simple:
    Plug it in when you can. Use the battery as you need. Don't let it drop to 0%.

    Use your MacBook as a tool, not a burden.

    Technical info:
    Older NiCd batteries had a "memory" effect. Cycling batteries to prevent that no longer applies.

    The current Lithium batteries do not take deep discharges (<20%) well. Shallow charges (90%) create less wear than deep cycles charges because wear is cumulative.

    Oh and tapatalk sucks because half my post was truncated in posting.
     
  21. aristobrat macrumors G4

    Joined:
    Oct 14, 2005
    #21
    If anyone's curious about what Apple actually says about them, they've somewhat recently redone the section of their website dedicated towards batteries.

    http://www.apple.com/batteries/
     
  22. cfedu macrumors 65816

    cfedu

    Joined:
    Mar 8, 2009
    Location:
    Toronto
    #22

    Draining a battery completely is the best way to permanently kill your battery. A mac will shut down before it drains completely to prevent this from happening, but if you forget to charge it right away it will slowly drain to zero and kill the battery. I would never go much lower than 20%.

    Best advice is to plug it in whenever practicable.
     
  23. Steve121178 macrumors 68040

    Steve121178

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    Apr 13, 2010
    Location:
    Bedfordshire, UK
    #23
    No, just use it as you see fit and ignore anyone telling you to do otherwise.
     
  24. Newtons Apple Suspended

    Newtons Apple

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    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #24
    Most of the new devices actually DECREASE the charging voltage as the battery reaches close to being full. Many devices today will charge quickly to like 80% but take much longer to go from 80 to 100%. It is a battery saving feature.

    This is why we still keep having battery threads. So much cr^p posted here.
     
  25. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #25
    Unfortunately, there is a lot of misinformation being posted in battery threads, as too many people make up things as they go along, rather than read what the manufacturer has to say. Apple knows best how to care for the batteries in its products.

    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.
    The link below should answer most, if not all, of your battery/charging questions, including tips for maximizing battery performance. If you haven’t already done so, I highly recommend you take the time to read it.
     

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