Does having wifi always on drain your battery more?

Discussion in 'iPhone' started by dxr808s, Jun 30, 2012.

  1. dxr808s macrumors member

    Mar 10, 2011
    A friend told me today that I should turn my wifi off because the wifi is constantly looking for a signal and it drains my battery quicker.

    Is this true?
  2. aliensarecool macrumors 6502a


    Feb 25, 2012
    Wirelessly posted

    I leave it on all the time cuz I was under the impression it saves battery. I auto connect at work and home. And most other places I just use 3G cuz its not worth connecting it everyone I go somewhere
  3. AnotherBrian macrumors regular

    Jun 29, 2010
    Probable not that much

    I don't think it drains that much, I have always left mine on since the first iPhone. The few times I didn't use my phone much the charge lasted for days and wifi was on. I think you should worry more about location services, bluetooth, notifications, weather widget and push email.

    Now if you feel like cutting it off all the time sure it will probable save a little. But if I did that I would most likely forget to turn it on when i get home and run my megabytes up on my cell plan, AT&T is pretty fast at my house so it would be hard to tell if was surfing on wifi or 3G on my phone.
  4. dccorona macrumors 68020


    Jun 12, 2008
    having it on uses more battery than having it off, but it also uses less power than 3G, so if you're connecting to the internet at all it saves power to have it on (and in use)
  5. bandofbrothers macrumors 601


    Oct 14, 2007
    Perform a search on here and other forums and you will be given scores of threads on opinions wether thing this feature off when not in use saves battery.

    Its one of the specs that is recommended to turn off when trying to save battery. As battery standby and talk time is governed by the owners usage i would suggest that you fully charge the unit and leave the wifi on and keep a rough track on what you do with it until your % reaches, say 10%.

    Then recharge it and try to use it the same way again with it off.

    Its always going to be a rough guide as your phone will always perform a little differently due to different parameters.

    Most battery concerns are resolved by doing this....

    Turn off the % indicator and stop thinking about it ! ;)
  6. Spectrum Abuser macrumors 65816

    Spectrum Abuser

    Aug 27, 2011
    I was out and about today and left the Wifi settings on the [on] position and the battery only wen't down from 99% to 97% during a three hour standby period. It's not worth the hassle of turning off IMHO.
  7. iHelios macrumors member

    Jun 28, 2012
  8. Technarchy macrumors 604


    May 21, 2012
    I leave it on, and my battery lasts longer than any of my android drones still.
  9. Hexiii macrumors 65816


    Jun 30, 2011
    Prague, Czech Republic
    Mine drains twice as much in standby when on, about 1,5%/hour.
  10. throAU macrumors 603


    Feb 13, 2012
    Perth, Western Australia
    Yes it does, even more so if you aren't connected to an access point.

    Because while wifi is on, it will be periodically scanning for APs to connect to.

    Ditto for leaving 3G on when there is no 3G service available. Constantly scanning for a 3g network when non exists consumes lots of battery.

    If you know you're in an area with no wifi, turn it off.

    However - if you ARE on a wifi network, transferring data over wifi is less battery draining than 3G.
  11. libertysat macrumors regular

    Nov 10, 2010
    For me, that was true when I had an android but not so with iPhone 4

    I almost daily travel in and out of cell range for extended times and notice zero difference with battery usage with iPhone

    I had to constantly have my droid on car charger or could not go more than few hours in weak areas
  12. Shadowbech macrumors 601

    Oct 18, 2011
    Planet iPhone
    I usually always leave it on. I don't see any differences in battery stats with it being on or off.
  13. quietstormSD macrumors 6502a


    Mar 2, 2010
    San Diego, CA
    I leave it on. I haven't played with the toggle of having it on/off. I wish the stock iOS firmware had something like SBSettings where it's easy to turn things like, bluetooth and wifi on/off.

    I've generally had a poor 3G connection on AT&T whenever I've been inside my apartment (3 of 4 locations over the years). And I do use my phone a lot in my home. (Just more convenient then having to power up my MacBook Pro if I want to find something quick.)

    If you use data on your phone a lot in a WIFI area, I do believe it does save battery life, if you leave it on.
  14. aPple nErd macrumors 68030

    aPple nErd

    Feb 12, 2012
    Jailbreaks/IOS Hacks
    it helps with my iPhone. my iPod touch..... no not so much.
  15. Bruce91 macrumors newbie

    Oct 8, 2011
    Washington D.C.
    On my 4S it's always on, but I haven't noticed it affecting the battery. I usually get a little over a day on a full charge with wifi.
  16. Interstella5555 macrumors 603


    Jun 30, 2008
    The "ask to join networks" option is the real key here.
  17. PatrickW98 macrumors 6502


    Apr 26, 2012
    Subrubs of Chicago, IL
    Whenever I leave the house I turn of WiFi. When I am at home I turn off data. It really saves battery.
  18. jpetticrew macrumors 6502a


    May 13, 2009
    This. I always turn that off.
  19. Small White Car macrumors G4

    Small White Car

    Aug 29, 2006
    Washington DC
    Back in the iPhone 3G days I really noticed a big difference when I left it on.

    With my iPhone 4S sometimes I turn if off and sometimes I leave it on and I rarely notice any difference at all. I think the batteries have gotten better over the years while the power need to search for Wifi has remained the same.

    So, basically, I used to tell people to turn this off but I really don't any more. It makes some kind of difference, but to me it's not worth the trouble anymore.

    (I do turn it off when I go on vacation and know I won't have Wifi for a week, but that's about it these days.)
  20. Tom G. macrumors 68010

    Tom G.

    Jun 16, 2009
    Champaign/Urbana Illinois
    +1 Small white Car.

    I was getting to post this but he beat me to it. I also have done both and it doesn't seem to matter much.
  21. throAU macrumors 603


    Feb 13, 2012
    Perth, Western Australia

    Seems to be the case for me with iphone 3G-s, so i maintained the habit when I got a 4-s.

    i spend days (up to a week) in remote locations (like, Mali, Zambia, Kazakhstan, outback Australia) with VERY poor/weak service and i find turning off everything not possible to use helps significantly.
  22. ValerieDurden macrumors 6502a

    Feb 3, 2010
    Philadelphia, PA, USA
    Mine is on all the time I never turn it off and I haven't seen any changes in battery life with it on or off.
  23. xnickitynickx macrumors regular


    Mar 13, 2012
    Orlando, FL
    As was said, I always leave mine on. I don't wanna worry about toggling it throughout the day. I do however leave the ask to join networks option off. I'll look when I want, rather than be pestered all day.
    I still get stellar battery life :D

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