When should I charge my battery?

Discussion in 'iPhone Tips, Help and Troubleshooting' started by Learylvr., Sep 27, 2018.

  1. Learylvr. macrumors regular

    Learylvr.

    Joined:
    Nov 18, 2011
    #1
    I’ve had IPhones since the 4 so I should know this. I now have the IPhone Xs Max. What percentage should I let my phone get down to before I charge it?? I want to keep my battery healthy and get the best performance from it. Does it hurt to plug it in when in the car, even if the battery isn’t low? I usually try to drain it once a month before plugging it in to keep it calibrated. Is this necessary? Thanks for the tips and advice.
    Cheers
     
  2. JPack macrumors 68040

    JPack

    Joined:
    Mar 27, 2017
    #2
    Keep it between 80/20%.

    Don't drain the battery completely, that negatively affects battery health.
     
  3. Learylvr. thread starter macrumors regular

    Learylvr.

    Joined:
    Nov 18, 2011
    #3
    Well thanks that’s exactly what you needed to know.. One last question.. if I’m sitting next to a charger should I plug in even if I have
    Plenty of battery? Like when in the car or sitting at a desk for example. I’m not sure if just constantly plugging in for a charge (even if I don’t need one) is bad for my battery or makes it weaker over time. Thx so much for the tips..
    Cheers
     
  4. C DM macrumors Sandy Bridge

    Joined:
    Oct 17, 2011
    #4
    Realistically whenever you want. The batteries and charging circuitry are set up in such a way these days that you won't really be in a state where you'd do anything that's really noticeably damaging to the battery. Mainly it's the heat that you'd want to avoid--either leaving or using the phone where it's hot or if it's heating up for some reason for an extended period of time while doing something.
     
  5. JPack macrumors 68040

    JPack

    Joined:
    Mar 27, 2017
    #5
    The only thing I would avoid is charging in your car.

    Most of the USB cigarette adapters on the market are poor at regulating voltage fluctuations. The socket can output up to 14V and unless the adapter is well built, it can damage your phone.
     
  6. C DM macrumors Sandy Bridge

    Joined:
    Oct 17, 2011
    #6
    Doesn't the phone ultimately regulate the amount of charge it can actually take (as in higher powered chargers won't necessarily charge the phone faster if the phone doesn't support that level of charging)?
     
  7. JPack macrumors 68040

    JPack

    Joined:
    Mar 27, 2017
    #7
    The phone can regulate the input current, but it expects steady voltage (5V) coming in. In most cases, the cigarette plug in a car wasn't designed to power sensitive electronics.

    A genuine Lightning cable can stop voltage fluctuations but I'd suggest stopping the problem at the source.

    https://www.discdepotdundee.co.uk/apple-tristar-u2-repair-and-cheap-lightning-cable-damage/
     
  8. AxlTJ macrumors member

    AxlTJ

    Joined:
    Aug 3, 2018
    #8
    It's been a known fact that lithium-based batteries benefit from the 80/20 cycle charge. However, there are also other factors to consider in keeping the battery healthy such as extreme temperatures, stress (like running multiple apps at once), charging at fluctuating voltages and etc. That said, to maintain battery health, one must take all these factors into account than just focusing on the charge cycle.
     
  9. Learylvr. thread starter macrumors regular

    Learylvr.

    Joined:
    Nov 18, 2011
    #9
    Thank you everyone, that is plenty of info for me and exactly what I wanted to know.. I know quite a lot about IPhone/Android.. but the battery care has always fallen short. Thanks for the help and tips.
    Cheers
     
  10. givemeanapple macrumors Demi-God

    givemeanapple

    Joined:
    Oct 2, 2016
    Location:
    Earth
    #10
    Never read so much nonsense like on this post. iPhone batteries like all Lithium-ion batteries are designed to charge in cycles and meant to charge whenever you need or want. The 20% and 80% charging thing is a total nonsense since after 80% until 100% iOS limits the battery charging speed so it won't cause any damage to the battery.
    More information at
    https://www.apple.com/batteries/why-lithium-ion/
     
  11. C DM macrumors Sandy Bridge

    Joined:
    Oct 17, 2011
    #11
    It's not really nonsense, it doesn't seem that anyone is saying it's harmful to go beyond 80% or anything like that, just that it's best/better when the battery is mostly in the 40%-80% range. That said, how much of a real world benefit that would bring, especially when compared to the hassle of keeping an eye on it all and all that, ultimately makes it something that isn't really all that worthwhile to really bother with.
     
  12. eyoungren macrumors Core

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    ten-zero-eleven-zero-zero by zero-two
    #12
    I tend not to concern myself with the battery and just use my phone.

    My phone goes on charger at night with the screen on all night (nightstand clock with a black background). I get up at 5am and the phone is off charger until 10 or 11pm.

    When I go to bed I have anywhere from 70-75% of battery left. But whatever percentage it is I put it on charger anyway at night.

    I've done this for three years now. I did it with my 6+ for seven months, my iPhone 5 for two and a half years and a 3GS for nine months before that. I've never had any issues.

    One of the popular battery apps tells me that my battery has 14% wear. I've been told that heat has an effect on battery, so I guess this is pretty good considering the phone has spent two summers of Phoenix, AZ heat going around in a car with no A/C and windows that are stuck closed.

    All of this said, I don't use my phone like most people seem to do. Calls, texts, email and light web browsing.

    I'm on iOS 9.0.2 if that matters to anyone. No CPU throttling due to battery.

    EDIT: Oh yeah. My phone is never turned off (it's on 24/7). I cannot recall the last time I had to plug it in because the battery was too low.

    My wife's 6+ is similar, but she uses her phone a bit more than I do.
     
  13. John webstar44 Suspended

    John webstar44

    Joined:
    May 9, 2018
    #13
    No problems here always charge my battery on 20% or under 195 battery cycles 95% health iPhone X.
     
  14. Irock619 macrumors 68000

    Irock619

    Joined:
    Sep 16, 2011
    Location:
    San Francisco, CA
    #14
    Do you upgrade every year?
     
  15. C DM macrumors Sandy Bridge

    Joined:
    Oct 17, 2011
    #15
    How would that remove charge cycles?
     

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14 September 27, 2018