Apple Watch Impacts iPhone Battery Life... One Way or the Other

Discussion in ' News Discussion' started by MacRumors, Apr 26, 2015.

  1. MacRumors macrumors bot


    Apr 12, 2001

    With the launch of the Apple Watch on Friday, the first wave of consumers have received their Apple Watches. Our forums are abuzz with activity surrounding Apple's newest device. While there were initial concerns about the Apple Watch's battery life, reports seem to indicate that the Apple Watch, itself, has no problem lasting a full day.

    However, there have been mixed reports about the impact the Apple Watch has on iPhone battery life. The Apple Watch needs to be paired to an iPhone for full functionality. The iPhone connects to the Apple Watch via Bluetooth and Wi-Fi to feed it data and notifications throughout the day.

    Some users have found a notable improvement in iPhone battery life with the addition of an Apple Watch. This suggests the act of offloading notifications and quick interactions to your Apple Watch, could make your iPhone battery last much longer.
    However, several other users have noticed a significant drain on their iPhone batteries in early usage with the Apple Watch.
    Former Engadget editor Ryan Block had as similar experience and pinpointed the Apple Watch Companion app as the culprit. John Byrne also puts some blame on the Companion App, saying that force-quitting the app seemed to help at least a bit. A discussion thread in our forums provides similarly mixed results, with one user blaming his battery drain on checking email on the Apple Watch. Due to the inconsistency in reports, it seems that either a software bug or particular usage pattern could be a culprit.

    Article Link: Apple Watch Impacts iPhone Battery Life... One Way or the Other
  2. SMIDG3T Suspended


    Apr 29, 2012
    Well it is connected to the Watch and has to keep going backwards and forwards to receive data etc.
  3. shahin90 macrumors regular

    Oct 23, 2012
    My iPhone 6 plus' battery never went to 0 throughout the day. Now I have to recharge at 8-9pm.
  4. Shayanftw macrumors member

    Feb 11, 2014
  5. bunnicula macrumors 68040


    Jul 23, 2008
    I'm having absolutely no issues with iPhone battery life.

    It seems pretty much the same as it did without the Apple Watch.
  6. shahin90 macrumors regular

    Oct 23, 2012
    This can only be fixed with a more efficient bluetooth technology which I don't see happening until version 2 at least.
  7. sputnikv macrumors 6502


    Oct 3, 2009
    i can confirm. my watch would outlast my phone if i didn't charge my phone intermittently throughout the day
  8. willwritefortea macrumors newbie

    Feb 25, 2015
    Battery life on my 6 has definitely gotten better. Home and lock screen usage has gone way down.

    Both the watch and my phone lasted a day of normal use with no problems. Neither dipped below 30%.
  9. The Bogeyman macrumors regular

    The Bogeyman

    Mar 15, 2012
    Under your stairs
    Well the watch uses the latest Bluetooth technology, so I doubt there would be a an improvement due to that.

    Yes it is the companion app which is causing the drain, combined with, I suspect- people using their shiny new watches all the time! The watch relies on the phone for all its online functions, so the radios are being used regularly, especially if you are like me and can't leave the damn thing alone!

    On the serious side, unlike the Pebble, the Apple Watch functions just fine without the companion app running, so just close the app when you are not using it. I was slightly alarmed at how quickly my phone battery was running down until I experimented with closing the app. Just shut it down when you are not using it. It's not difficult.
  10. lincolntran macrumors 6502a


    Jan 18, 2010
    This is definitely proof that battery life of the two are directly depend on each user usage patterns. Nothing more and nothing less.
  11. Brian Y macrumors 68040

    Oct 21, 2012
    More relevantly, by 9:30pm with my Pebble connected my battery would be 10-20%. With my Apple watch connected it's 40%.
  12. forgot-username macrumors member

    Apr 7, 2015
    Battery life a little worse but have been installing AW apps a lot and stuff. Good tip about force quitting the companion app. Hope it helps.

    Edit: although quick check in Usage shows Companion at 2% of my battery
  13. jagolden macrumors 6502


    Feb 11, 2002
    I am finging minimal impact on my iPhones battery. However, I am not a "power user" like some people are.

    Watch and phone easily lasting long day. I am still only charging my phone about two hous in the morning before work.
    My phone is on all day, frequent use. Also it is on all night as I sleep with headphones on.

    Strange the differing reportss.
  14. dannyyankou macrumors 604


    Mar 2, 2012
    Your watch is a mirror for your iPhone. It's just doing tasks the phone would normally do. In addition to that, the iPhone is on sleep mode more often, and the screen stays off when your doing tasks on the watch. So it really shouldn't have much of an effect.
  15. MacFan23 macrumors 6502

    Feb 17, 2010
    I'm used to using bluetooth accessories with my phone, so that probably affects what I'm used to day-to-day, but I've been hitting 30-40% at the end of each day on my phone with the watch now.
  16. daniel4 macrumors newbie

    Oct 6, 2009
    New York
    Settings > General > Usage > Battery for a summary of the full impact the watch has on the iPhone battery.
  17. CrAkD macrumors 68040


    Feb 15, 2010
    Boston, MA
    I've gotten better battery life on my phone because my phone doesn't light up for every notification now
  18. jwm macrumors 6502


    Nov 18, 2010
    Hertfordshire, United Kingdom
    No problems here with my iPhone 6 and pre order 42mm Space Black.
  19. chumpy34, Apr 26, 2015
    Last edited by a moderator: Apr 27, 2015

    chumpy34 macrumors 6502


    Jun 28, 2010
    My battery life has improved as I am using my iPhone 6 much less. Absolutely loving my Sports Watch after 2 days of use.

    I just experienced this, can some one let me know how this works? I left my iPhone at home, rode my bike to my gf's house with my Watch on, when I got to her house and inside (she has wi-fi) my Watch started dinging and I was seeing incoming texts and could send replies as well as emails too.

    Is this because my iPhone has been on this network before? But how freaking cool is this? I can start leaving my phone home more often now and still be in touch/contact. Dang Apple!

    P.S. My other watch, a Sports with black band which said 4-6 weeks, just got charged to my cc and is preparing for shipment! Wooohooo!
  20. Technarchy macrumors 604


    May 21, 2012
    This is exactly why I am holding tight and waiting for the next 14nm iPhone before considering an Apple Watch.

    The always on connection is a better hog, or at the very least battery life impacting to a noticeable extent

    Going 14nm should give a huge battery life bump to the iPhone 6S and equalize any concerns about Apple Watch drain.
  21. jagolden macrumors 6502


    Feb 11, 2002
    Sorry to be dense here. Do you mean the "Watch" app? How do you shut it off? Does it affect the operation of the watch?

  22. evangw macrumors regular

    Feb 9, 2008
    I seem to remember Jacqui's Apple articles when she was doing those for Ars Technica (for like years) as being particularly unreliable sources of information.

    Edit: Looking back, maybe they weren't bad, just incredibly banal:
  23. Esoom macrumors 6502


    Apr 30, 2010
    They need to polish up the software a bit, when I started using a Pebble, my battery life increased by about 20% because of reduced SOT.
  24. johnnyjibbs macrumors 68030


    Sep 18, 2003
    London, UK
    Me too. I think the extra drain that the watch uses (which may not be too much) is compensated by the fact I've been looking at it (and therefore turning the screen on) less.

    Maps directions turn by turn is particularly good on both as the phone's GPS but screen is not on, whereas the watch only needs to tap me at relevant points.

    Overall, I'm very satisfied.
  25. starnox macrumors 6502

    Apr 15, 2005
    Well if we are to trust the battery usage stats in iOS 8 then the companion app for me has only used 2%.

    Can't say I've noticed any ill effect. After a day's usage my watch is on 56% and my iPhone 24%. Been using them both a fair amount.

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