Is this normal battery drain?

Discussion in 'iPhone Tips, Help and Troubleshooting' started by kagharaht, Mar 7, 2017.

  1. kagharaht macrumors 6502a

    Oct 7, 2007
    iPhone 6s Plus shows 65% with only 2 hours usage time since last full charge. So, since unplugging it, so far within this time period I'm at 65% already. I'm not a heavy user and Background apps are all off. Isn't this a bit low of a percentage for just 2 hours of use? I have auto lock in 2 min and auto brightness on indoor at about 40% brightness. Any comments or is my battery in need of replacement?
  2. casperes1996 macrumors 68040


    Jan 26, 2014
    Horsens, Denmark
    Check the Battery section under Settings. In there you can see what has caused battery usage. Report back
  3. kagharaht thread starter macrumors 6502a

    Oct 7, 2007
    50% safari for 48min, 15% Notes 27 min, 13% home lock screen 27 min, 9% messages 12 min, 5% mail. The rest 1 or 2 %.
  4. Anuba, Mar 18, 2017
    Last edited: Mar 18, 2017

    Anuba macrumors 68040


    Feb 9, 2005
    I have similar battery issues with my 6s Plus, but I've found that the % indicator is way, way off from what the remaining charge actually is.

    For the first 15 minutes or so, it sits comfortably at 100% during use. Then it starts counting down rapidly, practically free-falling to some number between 85 and 95 before pausing there for quite a while. You can watch the indicator losing 1% every 5 seconds or so. This plummet-levitate-plummet-levitate thing (the rapid drops come in 10-15% sized chunks) keeps going until it's down to 1%. Then it keeps running for hours on this supposed "1%" before eventually shutting down. I mean that quite literally; I've had it run for up to 4 hours with 1% left (4 hrs of usage, not standby). You'd think that after showing it the true scope of its battery capacity, the phone would go "OMG! It's THAT much more than I projected? Wow. Thanks for alerting me to the huge power stash hidden under 1%. I will calibrate accordingly." Except it doesn't learn anything. It will be exactly as clueless after a calibration as it was before it.

    The "normal" battery wear level reported by Coconut Battery (and Battery Life) is around 12% (88% of original capacity) - the phone is 17 months old - but once the free-falling is in progress, Battery Life will report anything from "VERY BAD - 70% wear level" to "BAD - 23% wear level". Battery Life will keep fluctuating between crappy orange and disaster red, and I won't see lime green ("AVERAGE - 12% wear level") until it's down to 1% again. If I reboot the phone at a time when the battery level appears unreasonably low, I often find that it magically regains 20 or so percent after restarting. What was 43% is now suddenly 65%, then it starts another rapid countdown and settles somewhere around 60% within a minute or two.

    None of my other iOS devices behave like this. I have an iPhone 5s and an iPad Air that are both 3 years old and they're both at over 90% of original capacity, and discharging is stable and predictable. So I took the 6s Plus to an Apple Premium Reseller and the guy there claimed that it was normal behavior for iPhone models 6 and later. I was told the exact same thing by another guy when I called a support line. Well, it can't be normal behavior because then the battery indicator is so useless you might as well replace it with an 8-ball. 4 hrs usage on 1% would mean 400 hrs of usage and over 500 days of standby.

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3 March 7, 2017