battery health

Discussion in 'iPad' started by tim1000, Apr 18, 2018.

  1. tim1000 macrumors regular

    Joined:
    Sep 16, 2014
    #1
    is there a battery health information for iPad like whats on the iPhone now?
     
  2. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #2
    It’s not there. The batteries on iPad is way too big for it to go through any “health” issue within average lifetime.
     
  3. BLBL macrumors regular

    Joined:
    Apr 11, 2018
    #3
    You can monitor battery health with free apps from App Store like Battery Life. I have used that with my 2017 and 2018 iPads and it seems they both lost 4-5% of their battery capacity within first couple of weeks in light use, so battery in these seems to deteriorate much faster than in my iPhone.
     
  4. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #4
    No apps from the AppStore can provide correct data post iOS 10 update.
     
  5. m4v3r1ck macrumors 68020

    m4v3r1ck

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    Nov 2, 2011
    Location:
    The Netherlands
    #5
    What about CoconutBattery, tried that already?
     
  6. BLBL macrumors regular

    Joined:
    Apr 11, 2018
    #6
    That app I mentioned seem to work just fine in my iPhone. It give exactly the same result as IOS 11.3 build in battery health information. For some reason iPad battery seem to lose capacity very fast compared to iPhone which keeps full capacity for several months without any drop.
     
  7. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #7
    Might be a fluke. Apple doesn’t let apps have access to battery data anymore.

    Also iPad battery capacity can’t degrade faster than iPhone battery because of the total capacity being way higher than an average iPhone. By the laws of physics this is not possible unless you’re charging the iPad way more than the iPhone. Is this the case?!
     
  8. BLBL, Apr 19, 2018
    Last edited: Apr 19, 2018

    BLBL macrumors regular

    Joined:
    Apr 11, 2018
    #8
    I doubt it was not just a fluke because several iPhones i’ve seen seem to give with this app comparable results to IOS build in battery health info. Results also seem to be comparable to coconut battery results.

    Also both my 2017 and 2018 iPads gave full battery capacity out of the box when new but within very short time it started to drop steadily. 2017 took 2-3 weeks until dropped and 2018 it took only a half week until battery health was down to 95-96%. That was in very light use without any extreme conditions or using battery until empty. To me it definitely looks like battery is culprit. Or perhaps charging circuit is acting funny. I bet initial charge was from battery manufacturer.
     
  9. joeblow7777 macrumors 603

    Joined:
    Sep 7, 2010
    #9
    I don't know about that. It's still a Li-ion battery, so it's subject to the same wear over time as a phone's battery. Laptop batteries are ever larger and they definitely wear with age.
     
  10. rui no onna macrumors 603

    rui no onna

    Joined:
    Oct 25, 2013
    #10
    Remaining battery capacity on iPads in our household per Battery Life app

    iPad 4 (iOS 6, Feb 2013) - 88% (223 cycles)

    iPad Air (iOS 9, Nov 2013) - 87% (420 cycles)

    iPad Pro 9.7 (iOS 10, Mar 2016) - 89%

    iPad Air 2 (iOS 10, Mar 2017) - 94%

    iPad 5th gen (iOS 11, Mar 2017) - 95%

    iPad Pro 12.9 2nd gen (iOS 10, Jul 2017) - 100%
    --- Post Merged, Apr 19, 2018 ---
    True, it's still subject to wear. However, the size of the iPad's battery relative to its power consumption is pretty good. My mom's a fairly light user. Her iPad only needs charging once a week (sometimes every two weeks). Meanwhile, her iPhone is charged every day so the iPhone goes through charge cycles more quickly than the iPad.

    I'm a heavier user. If I used my iPhone (7) the same way I use my iPad, I'd need to charge my iPhone twice a day.

    Laptop batteries may be larger but power consumption is also much higher. I've yet to own a laptop with battery life that can compete with the iPad's. Admittedly, I haven't bought a new laptop since, hmm, 2013? Maybe things have improved significantly since.
     
  11. walkthruwalls macrumors member

    walkthruwalls

    Joined:
    Apr 30, 2014
    Location:
    waters of Thailand
    #11
    Its 'constant usage' that degrades the battery, not the 'constant charging'. I have my devices and computers constantly plugged in and their battery health have lasted way longer than my devices, iPhones, that are always on the go.
     
  12. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #12
    It’s charges and discharges that wears the battery out. Every lithium ion battery on the planet work that way. An iPad with its higher capacity would generally go through less charging cycles than an average iPhone. It’s as simple as that. Now if someone uses their iPad a lot more and charges accordingly then most certainly it will wear out faster but with normal usage that is hard to come by.
     
  13. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #13
    They all wear out. But relative to an iPhone, an iPad battery wear will be significantly lower in general usage conditions.
     
  14. rui no onna macrumors 603

    rui no onna

    Joined:
    Oct 25, 2013
    #14
    Yep.

    Besides, per warranty documentation, iPhone batteries are designed to retain 80% of original capacity at 500 complete charge cycles. Meanwhile, iPad batteries are designed to retain 80% of original capacity at 1000 complete charge cycles.

    Even if one uses 1 complete charge cycle every day on both devices (~7W on 4.7" iPhone and ~27-32W on 9.7"/10.5" iPad), the iPad's battery should last ~2.7 years while the iPhone's battery would only last ~1.4 years.

    I think I've mentioned this before in the battery throttling thread but I'd gladly sacrifice some thinness and weight to get bigger batteries on the 4.7" iPhones.

    Model - Battery Weight (g) - Wh Rating

    iPhone 6 - 28 - 6.91
    iPhone 6 Plus - 46 - 11.28
    iPhone SE - 26 - 6.21
    iPhone 6S - 25 - 6.39
    iPhone 6S Plus - 41 - 10.61
    iPhone 7 - 29 - 7.45
    iPhone 7 Plus - 39 - 11.1
    iPhone 8 - 26 - 6.96
    iPhone 8 Plus - 38 - 10.28
    iPhone X - 41.5 - 10.35

    iPad 2 - 144 - 25
    iPad 3 - 214 - 43
    iPad 4 - 214 - 43
    iPad Air - 165 - 32.9
    iPad Air 2 - 132 - 27.8
    iPad Pro 9.7 - 136 - 27.9
    iPad 5th gen - 165 - 32.9
    iPad Pro 10.5 - 147 - 30.8
    iPad Pro 12.9 - 196 - 41.4
     

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