Turned off Bluetooth on iPhone and battery life went up

Discussion in 'Apple Watch' started by mdelrossi, Oct 28, 2018.

  1. mdelrossi macrumors member

    mdelrossi

    Joined:
    Jun 22, 2005
    #1
    I was having some issues with my iPhone battery. So I Turned off Bluetooth on iPhone and battery life went up on both the phone and the watch.

    I’ve got to do more investigations, but somethings up.

    iPhone 6s with a replaced battery from Apple.
    Apple Watch Nike 4
    mdr
     
  2. musicpenguy macrumors 65816

    Joined:
    Oct 29, 2006
    #2
    I prefer to operate that way just because the watch behaves better for me using WiFi/LTE - Bluetooth I only use when I need to sync new apps, activity data, or something else that only talks over BT. Otherwise watch stays on WiFi/LTE.
     
  3. ipaddaro macrumors regular

    Joined:
    Dec 6, 2014
  4. musicpenguy macrumors 65816

    Joined:
    Oct 29, 2006
    #4
    No Bluetooth on the watch I believe is the most battery efficient way to run - that’s not why I’m doing it. WiFi on is very power efficient on the other hand.
     
  5. tromboneaholic Suspended

    tromboneaholic

    Joined:
    Jun 9, 2004
    Location:
    Clearwater, FL
    #5
    The watch will use Wi-Fi if the phone's bluetooth is off. If your phone is normally far away from the watch (in a bedroom while you are in the kitchen) bluetooth will consume more energy than Wi-Fi.

    If no Wi-Fi connection is available, the watch will continue using energy as it searches for the phone using bluetooth.
     
  6. ipaddaro macrumors regular

    Joined:
    Dec 6, 2014
    #6
    but priority is bluetooth or wifi? what if the iphone is near and both are connected to the same wi fi (with bluetooth on on iphone)?
     
  7. tromboneaholic Suspended

    tromboneaholic

    Joined:
    Jun 9, 2004
    Location:
    Clearwater, FL
    #7
    From the comments I've read, the watch has to get pretty far away from the phone to switch from Bluetooth to Wi-Fi.

    OP has an iPhone 6s, which supports Bluetooth 4.2. Apple Watch Series 4 and newer iPhones since iPhone 8 support Bluetooth 5, so the results OP sees might vary based on location (is there Wi-Fi) and device (Bluetooth 5 is more efficient).
     
  8. ipaddaro macrumors regular

    Joined:
    Dec 6, 2014
    #8
    but if you have bt 5 on AW and not on the iphone, you will loose the low consumption benefits of bt 5? or only the iphone will drain faster?
     
  9. tromboneaholic Suspended

    tromboneaholic

    Joined:
    Jun 9, 2004
    Location:
    Clearwater, FL
    #9
    Both devices will use whichever version they have in common.

    So an Apple Watch Series 4 would drop down to use the 4.2 protocol when connecting to an iPhone 6s.
     
  10. ipaddaro macrumors regular

    Joined:
    Dec 6, 2014
    #10
    i have an iphone 7, maybe this is why i don't get same battery life as others
     
  11. tromboneaholic Suspended

    tromboneaholic

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    Jun 9, 2004
    Location:
    Clearwater, FL
    #11
  12. Newtons Apple macrumors Core

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #12
    I can notice no difference in battery use on days I choose not to wear my AW.
     
  13. ipaddaro macrumors regular

    Joined:
    Dec 6, 2014
    #13
    to be honest, sometimes i quite don't notice any difference during night with airplane mode, and day when it is connected to iphone... it's less at night, but considering that i don't use it.. 2% drop any hour at night vs. approx 3-4% during day
     
  14. mdelrossi thread starter macrumors member

    mdelrossi

    Joined:
    Jun 22, 2005
    #14
    Thanks for the insights. I updated my phone to 12.01, and battery life on both seems better, but not as good with Bluetooth off on the phone.
    My phone has been turning off and loosing battery life like crazy, so I’m going to nuke it and do a clean install.

    How come there’s no way to turn off Bluetooth on the watch?

    Thanks
    mdr
     
  15. ipaddaro macrumors regular

    Joined:
    Dec 6, 2014
    #15
    airplane mode i think.. and then activate only wi fi or lte... not 100% sure it works
     
  16. mdelrossi thread starter macrumors member

    mdelrossi

    Joined:
    Jun 22, 2005
    #16
    Thanks, but then I don’t get messages,calls, weather, etc.

    I have it on theater mode all the time, unless I’m exercising.
     
  17. ipaddaro macrumors regular

    Joined:
    Dec 6, 2014
    #17
    if you activate lte of wi fi i think you will get everything... maybe not phone calls on wi fi, depending on operator
     
  18. Bazooka-joe macrumors 68020

    Bazooka-joe

    Joined:
    Mar 12, 2012
    Location:
    Swindon, England
    #18
    I have never had to bother with the likes of whether to switch BT/WIFI/LTE on or off. I have everything switched on.
    Battery life never drops below 60% on the phone or watch so I just charge them both up overnight. I keep LTE calls on the watch short and brief as that does eat up the battery....far far more than Bluetooth. There was a post on another threat where a guy said that he got an entire day out of his watch on LTE
     

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17 October 28, 2018