iOS 7 Battery dies at 3%

Discussion in 'iOS 7' started by jordancrombie92, Oct 1, 2013.

  1. jordancrombie92 macrumors regular

    jordancrombie92

    Joined:
    Oct 29, 2012
    Location:
    United Kingdom
    #1
    Honestly I would say battery life on iOS 7 has vastly improved upon iOS 6.

    However there is one thing that I have a problem with. My battery always dies at 3% rather than at 1%.

    Is this happening to anyone else? Does anyone know why this happens?

    Such a shame it still takes years to reboot after its died
     
  2. AeroZ macrumors 6502

    AeroZ

    Joined:
    Aug 7, 2013
    Location:
    Estonia
    #2
    Mine has died on 15%, 5% etc. not 1%.
    Today morning it died on 5%. I inserted the charger just for as long it could boot up. It showed 7% battery. Then removed the charger and let the battery drop to 1% and until totally empty. Then recharged. We'l see if the battery is now properly calibrated or not.
    Maybe it's some sort of new feature to save battery and extend the lifetime of it because as we know lithium ion batteries doesn't like to be totally empty.
     
  3. MinEderPlayz macrumors 6502a

    MinEderPlayz

    Joined:
    Aug 3, 2013
    Location:
    Hamburg, Germany
    #3
    LOL my 5s went from 100% to 10% on Sunday with all-day game-playing (with breaks)... In the evening I put it on full brightness to get the battery empty (for a charging cycle). It did last another 1.5 hours until it died at 0% in the menu bar :D
     
  4. John T macrumors 68020

    John T

    Joined:
    Mar 18, 2006
    Location:
    UK.
    #4
    Most likely your battery is dying when it indicates 3%. When did you last recalibrate it?
     
  5. TrenttonY macrumors 6502a

    Joined:
    Nov 14, 2012
  6. pmau macrumors 65816

    Joined:
    Nov 9, 2010
    #6
    Regardless of the percentage shown, the iPhone shuts down when the current starts to get too low.

    If you put the brightness up and have sound and GPU/CPU, the current from the battery will go down because more power is drawn.

    English is not my first language.
    A battery at 12V can keep its current when there's no or little power consumption, but when you increase the power the current will drop.
     
  7. jordancrombie92 thread starter macrumors regular

    jordancrombie92

    Joined:
    Oct 29, 2012
    Location:
    United Kingdom
    #7
    how do i recalibrate it??
     
  8. Armen, Oct 4, 2013
    Last edited: Oct 4, 2013

    Armen macrumors 604

    Armen

    Joined:
    Apr 30, 2013
    Location:
    127.0.0.1
    #8
    Why are you torturing your battery and letting it drop under 10% to begin with? It's bad to let a Lithium Ion battery run that low.
     
  9. eclipse01 macrumors 68020

    eclipse01

    Joined:
    May 16, 2011
    Location:
    Eau Claire, WI
    #9
    mine usually dies right when it hits 2

    only time I have seen 1% is jailbroken oddly enough
     
  10. Tar Sniffer macrumors 6502

    Joined:
    Apr 11, 2012
    #10
    My phone often does at 3-5%, nut this resolves the issue.
     
  11. PNutts macrumors 601

    PNutts

    Joined:
    Jul 24, 2008
    Location:
    Pacific Northwest, US
    #11
    No, no, no.

    Up until a few months ago Apple recommended running a phone until it shuts off once a month. Now they recommend a full charging cycle once a month. The phone shutting itself off is not the same as a battery being completely discharged. Theory is fine for in textbooks but Apple understands batteries in their practical application.
     
  12. gadget123 macrumors 68000

    Joined:
    Apr 17, 2011
    Location:
    United Kingdom
    #12
    My battery goes at 3% sometimes 5% or higher on IOS6 too so it's not just IOS7.
     
  13. stiligFox macrumors 6502a

    stiligFox

    Joined:
    Apr 24, 2009
    Location:
    10.0.1.3
    #13
    I'm just curious, as a bit of a battery fanatic -- what's the difference?
     
  14. charlituna macrumors G3

    charlituna

    Joined:
    Jun 11, 2008
    Location:
    Los Angeles, CA
    #14
    No it's not. It doesn't hurt a thing to let the battery die all the way out. Just dont leave it like that for ages.

    It's more damaging to never drain it via always having it on a charger, in a charging case etc
     
  15. Cricketman macrumors regular

    Joined:
    Nov 30, 2008
    #15
    Mine also dies at over 10% (like around 13-15%).
     
  16. MartinAppleGuy macrumors 68020

    MartinAppleGuy

    Joined:
    Sep 27, 2013
    #16
    I have found it to be the same.
     
  17. charlituna macrumors G3

    charlituna

    Joined:
    Jun 11, 2008
    Location:
    Los Angeles, CA
    #17
    A full charging cycle means that it has charged and discharged 100% but that can happen from 1 full up and down, 2 halves etc. It's part of how LI batteries work. Basically they are more concerned that you are taking it off the dang charger, charging cases etc sometimes.

    A full discharge cycle would be up and then down until it dies. Which doesn't hurt it at all. And can be a way to make sure you get your full cycle etc. And that you shut it down on occasion for the trash protocols to run. I generally have at least one day a week that it comes really close to the bottom anyway so it's not a bother to leave it off until it drops on its own. I just do something like turn off auto lock and turn on iTunes Radio for a little while. Or hit some Netflix.
     
  18. ideal.dreams macrumors 68020

    ideal.dreams

    Joined:
    Jul 19, 2010
    Location:
    OH
    #18
    I was under the impression that Lithium Ion batteries come pre-calibrated and do not need to be cycled to be accurate.
     
  19. PNutts macrumors 601

    PNutts

    Joined:
    Jul 24, 2008
    Location:
    Pacific Northwest, US
    #19
    Me, too. :) The phone monitors the battery voltage and shuts down the phone before the battery is discharged to a damaging level. The phone display says 0% from a "how much more can I use my phone" perspective but the battery is not at risk. But if you then put it in a drawer for a few months that's a different story. :eek:

    Same on the high end. Overcharging is destructively bad for batteries but the flames are pretty. We don't have to unplug after the phone displays 100% because the charging circuit doesn't allow the battery to overcharge. Apple's website shows the charging curve where it tapers off to a trickle charge as it reaches 100% and then starts a very small charge/discharge cycle to keep it topped off until unplugged. If you've ever charged overnight and see that it's only 99% charged in the morning you happened to catch it during the discharge cycle (pretty rare) or the phone needs to be calibrated (pretty rare).

    So use the battery for a least a total of 100% each month and charge it that much and you'll be fine. It doesn't matter if you use 100% of the battery in one day, or 10% over 10 days, or 5% over 20 days, etc. As long as you discharge / charge a total of 100% a month that fits into the manufacturer's recommendation.

    The scope of this conversation is for Apple products. Obviously other batteries and other chargers and other toys have their own requirements. A buddy bought a cheap replacement battery for a toy helicopter and he didn't know that the original battery had the charging circuit soldered to it which means the charger didn't have one. His replacement battery didn't have one (which is why it was cheaper) so unless he unplugs the charger when the battery reached 100% he will let the magic smoke out.

    Good question and I'm just a hobbyist with too many batteries and chargers. When I fast charge for quick turnaround it's done in a fireproof box. :cool:

    ----------

    Good answer and much shorter than mine. I didn't read it before I blasted my wall of text.
     
  20. John T macrumors 68020

    John T

    Joined:
    Mar 18, 2006
    Location:
    UK.
    #21
    As quoted by Apple:

    Calibrate iPhone Battery:

    "Once a month, use the iPhone until it it shuts OFF itself, due to Low Battery. Then Charge it back up without interruption, like unplugging it, to full charge 100%. Then before or after you do this, Reset iPhone, hold both home and power buttons until the iPhone restarts itself, ignore the "slide to power off slider", let the iPhone restart itself."
     
  21. eclipse01 macrumors 68020

    eclipse01

    Joined:
    May 16, 2011
    Location:
    Eau Claire, WI
    #22
    this is dumb, I have never done this to any of my devices and they have all worked just fine...

    batterys today don't need calibrated and don't hold a "memory" these are not NiCAD batteries we are using!
     
  22. darngooddesign macrumors G3

    Joined:
    Jul 4, 2007
    Location:
    Atlanta, GA
    #23
    Its not calibrating the battery per see, its calibrating your OS to know what is accurately 0% and what is accurately 100%.
     
  23. John T macrumors 68020

    John T

    Joined:
    Mar 18, 2006
    Location:
    UK.
    #24
    Then you obviously know more than Apple! ;)
     
  24. darngooddesign macrumors G3

    Joined:
    Jul 4, 2007
    Location:
    Atlanta, GA
    #25
    Just thought I'd address this.

    You're right that your devices will work fine without doing this. Its just a little fine tuning.
     

Share This Page