Battery life improved in airplane mode

Discussion in 'iOS 5 and earlier' started by EBreakingWave, Dec 18, 2011.

  1. EBreakingWave macrumors member

    Aug 24, 2010
    Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

    I switched my phone into airplane mode over the weekend and just left wifi on.

    My phone wasn't plugged in overnight and I've used it to browse and watch YouTube since I woke up about 4hrs ago.
    Right now the battery is at 97%.
    When I use the phone at work to browse emails on my 15min break, it goes from 100% to below 90% during that time and that's when it's not in airplane mode.

    It looks like the battery drains fast, atleast for me, when it's connected to my cell network or when I have it all switched on to use as a phone.

    Has anyone else noticed this?
  2. jmjoh122 macrumors member


    Oct 8, 2011
    yeah i think that it is pretty much fact that since your phone is not constantly connecting to the cellular network. You'll gain a ton more battery juice by keeping it in airplane mode. Just a heads up a lot of people turn airplane mode on at night and your alarm will still go off.
  3. TjeuV macrumors 6502

    Dec 14, 2011
    I aswell can confirm this. I've been in some occasions that I switched to airplane mode and indeed, connecting to the cellular network has a great effect on your battery charge.
  4. macingman macrumors 68020


    Jan 2, 2011
    Of course a cellular connection uses battery.....:rolleyes:
  5. Julien macrumors G4


    Jun 30, 2007
    Captain Obvios, News Flash: cutting off lights saves electricity too.:D
  6. CheesePuff macrumors 6502

    Sep 3, 2008
    Southwest Florida, USA
    So you bought your phone to not utilize it for phone calls or SMS messages?
  7. Lukeyy19 macrumors 6502a


    Feb 16, 2010
    England, UK
    this is a breakthrough! did you know that not driving your car uses a lot less fuel too...
  8. Primejimbo macrumors 68040

    Aug 10, 2008
    It's an iPod Touch now ;)
  9. rwwest7 macrumors regular

    Sep 24, 2011
    If you're in an area with almost no cell signal your phone will die super fast searching for one, in such a case it's best to tell it not to.
  10. srowndedbyh2o macrumors regular

    Mar 28, 2009
    My iPhone 4s was going from 100% charge to dead battery in less than 8hrs in standby mode. I too have little to no cell service at home, so I usually can't use the phone as a phone at home. When at home I connect to wi-fi and use apps, etc. It lasts fine throughout the day like this, however if I leave it in standby at night, without putting it in airplane mode, the battery will go dead overnight. If I charge it to 100%, then put it in airplane mode, the battery will still be at 100% when I get up in the morning. Never had this issue with my 3G, but that could be because of the different processor and the difference in apps I used with the 3G compared to the 4s. I don't leave the 4s plugged in at night because when left plugged in and in sleep mode, it sometimes would heat up to almost "hot". When it did get "hot", I'd just turn it on, start using it and it would cool right down.
  11. sectime macrumors 6502a

    Jul 29, 2007
    I turned my iPhone off last weekend, Turned it back on today... NO battery usage I think I'm on to something, will test and report back:cool:
  12. AtomicGrog macrumors regular

    Jul 25, 2011
    Really not hard to imagine the phone more frequently trying to communicate when signal levels are low as it tries to talk to the various servers/devices. Net result... more battery usage.
  13. bp1000 macrumors 65816

    Jul 7, 2011
    This is a crazy observation

    Of course it will use less power when the cell chip is disabled. it takes a lot more power to keep a cell signal active and working compared to wifi just a few meters away.
  14. Mortalias macrumors 6502


    Aug 24, 2011
    Los Angeles, CA
    That's nothing. I turned mine off for about 3 hours once. The battery was at the exact same level it was when I left it.

  15. nooaah macrumors 68000


    Sep 3, 2009
    Philadelphia, PA
    Turning off cellular data reduces your data usage. :eek:
  16. NYR99 macrumors 6502a

    Dec 30, 2007
    While, yes, this is true, I thought this was common knowledge.
  17. BlackTofu macrumors member

    Dec 15, 2011
    If I turn my mobile phone to Plane mode, my wifi and network all shut down
  18. srowndedbyh2o macrumors regular

    Mar 28, 2009
    Putting the phone in airplane mode decreases battery use. Yes, of course it’s obvious.
    The point is: you shouldn’t have to put the phone in airplane mode when in standby to prevent the battery from going dead.
  19. chiefpavvy macrumors 6502a

    Feb 23, 2008
    Personally I've always found Wi-Fi only to suck battery much faster than cellular (either EDGE or 3G). That's been my experience consistently, something to do with power consumption of the radios.
  20. PNutts macrumors 601


    Jul 24, 2008
    Pacific Northwest, US
    What does your cellular data usage look like? With that much of a drain I expect there also to be data being sent/received. I don't have a link handy but even with wifi on the phone sends data across the cellular connection. Disabling the sending of diagnostic data saved a ton of cellular data usage on the wife's iPad (obviously when she wasn't on wifi). Or maybe an app?
  21. A N G E L macrumors member

    A N G E L

    Sep 20, 2008
    San Francisco, CA
    Definite this.

    Also, turn off any notifications that you don't need from certain apps. It's the less that your iPhone has to 'request'/(consistently hold a connection to Apple servers) for new 'push' notifications that will help.

    Path & foursquare would send me notifications all the time from friends, but since I've turned those notifications off, my battery life is noticeably better. Not by a whole lot, but it helps :)
  22. Akack macrumors 6502a

    Mar 5, 2011
  23. Netherscourge macrumors 6502

    Oct 11, 2011
    Of course it saves battery life - your WIFI chip and 3G chip uses more battery power than anything else on your phone.

    Every single app you have that uses Notifications or Location services will tap the 3G/WIFI every couple seconds and suck down your battery.

    In Airplane Mode, 3G and WIFI are disabled, and as such, none of your apps can kill your battery by constantly pinging the internet for updates.

    HOWEVER, in Airplane mode, you can't use your phone or surf the internet either, so you're pretty much making your Phone useless.

    I thought this was common knowledge...?
  24. white4s macrumors 65832

    Nov 15, 2011
    New Jersey
    i dont even use airplane mode, why would anyone? except for during overnight
  25. srowndedbyh2o macrumors regular

    Mar 28, 2009
    Wi-Fi works just fine when the phone is in airplane mode.

    When I travel outside the USA I put my iPhone in airplane mode to avoid any roaming charges. I can’t use the phone as a “phone”, but with Wi-Fi I still have access to the internet, search maps, check current exchange rates, check reviews on hotels, have access to contact data, carry encrypted images of my passport, insurance documents, take photos/video, play music, listen to audio books, etc., etc.

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