How does Bluetooth affect battery life?

Discussion in 'iPhone' started by biblicalfury, Sep 22, 2007.

  1. macrumors member

    Mar 31, 2007
    I just picked up Bluetooth headset for my iPhone and I'm wondering how using it will effect the iPhone's battery life. I will probably only use it when driving, so I leave Bluetooth turned off on the phone during this time? Or will just turning the head set off be plenty?
  2. macrumors 603


    Dec 2, 2006
    the OC
    how bluetooth affects my battery life

    i find the battery life of my phone to be severely affected with bluetooth turned on. when i'm not using it for an extended period of time, i'll make sure to turn either the phone or bluetooth off. it's surprising how much of a drain it is. without bluetooth, i can get two days of moderate use easily. with bluetooth on, it turns into a day, maybe a day and a half. i haven't tried turning just the headset off, so i can't say whether that's enough. who knows? your mileage may vary.
  3. macrumors 65816

    Jan 5, 2003
    Dallas, USA
    I think BT only seriously drains battery when it's actually doing something. But being connected to a headset may involve some sort of chatty keep-alive traffic, so that might count as actually doing something. For example, the PlayStation 3 has a BT media remote that's on and connected all the time the PS3 is on, runs on a couple disposable batteries, but the batteries last a long time, as it only uses power when you hit a button to send a signal to the PS3. Same with the BT controllers. They're rechargeable, but they don't turn off automatically after a period of no use. Still, let them just sit there turned on without actively using them and the battery doesn't ever noticeably drain.

    I don't talk on the phone enough to use my BT headset on it, so I keep BT off. Otherwise, I've found the only thing that really causes much battery drain on an iPhone is actually *talking* on it -- like any cell phone. I'll listen to music for hours while working with airplane mode switched on, so nobody can call me and interrupt me, and a the battery gauge won't even budge. Leaving both cell on in standby and WiFI on, the battery barely drains, too.
  4. macrumors 68000

    Jun 20, 2007
    I agree with this. I don't talk a lot and leave on BT all the time and I am fine by the end of the day. (I charge each night.)

    Each person needs to do their own test and decided what is "good" for them.
  5. macrumors member

    Aug 11, 2007
    South San Francisco, CA
    anyone know what else you can use Bluetooth for besides headset use? I want to sync my iPhone to my computer wirelessly using Bluetooth ... Is there a way? If not, what the hell else can I use Bluetooth for besides headset use??
  6. macrumors 6502a


    Sep 17, 2007
    On the iPhone the Bluetooth can be used only for the headset.
  7. macrumors 68000


    Jul 6, 2007
    Wash DC suburbs
    I do not notice a significant drain when I use my Jawbone to the point where I am made to think, "wow this Bluetooth is killing my battery."

    I don't think it's a problem at all.
  8. macrumors regular

    Aug 29, 2005
    BT and Wifi consume a lot of battery power... :rolleyes:
  9. macrumors newbie

    Dec 30, 2010
    wrong. i use apple's wireless keyboard using bluetooth with my iphone and ipad. and i'd imagine apples magic trackpad would work as well.
  10. macrumors 6502a


    Feb 16, 2010
    England, UK
    wrong, and why did you drag up a 3 year old thread for that?
  11. macrumors 6502a

    Nov 20, 2010
    I use bluetooth on my phone with games. My wife and I frequently play games that use the Bluetooth.

    I have an app called Battery Doctor. Right now it's showing my Battery at 81% and indicates I can get 13hr 30 minutes of Bluetooth audio - if this is correct, it's not much of a battery draw, at all.

    whoops - sorry - I didn't realize this was such an old freaking thread :)
  12. macrumors regular

    Dec 23, 2010
    Very old, but I really can't fault members too much for taking the time to use the search function

    BTW you can't use a trackpad on a Non-JB iphone ( you need to JB and install the BT stack + a $5 mouse app)
  13. macrumors 6502a

    Aug 3, 2010
    Upstate NY
    It was right 3+ years ago when he said it...
  14. macrumors newbie

    Apr 20, 2011
    extend battery life

    Your Bluetooth connection is going to drain your battery even while you're not using it. If it's just for a short drive, I would leave it turned on, but if it's for anything longer, you will want it off (along with your GPS and wifi). Now since you're in your car, though, you may have a car charger - then you can just leave everything on : ) I thought this article had some good tips.
  15. macrumors 68020


    Feb 9, 2010
    Resurrection so I don't get a done of oh no another thread!! ;) Anyway, I just paired my iphone 4S with my car. In your experience is it worth to keep the bluetooth always on or does it destroy your battery life?
  16. macrumors 65816

    Mar 13, 2012
    I haven't turned it off since I got my 4s. I use in car BT for music, BT headset and heart rate monitor (BT4) at the gym. I get 1 day use minimum which is fine since I charge at night normally.
  17. Ramonn, May 8, 2012
    Last edited: May 9, 2012

    macrumors member

    Apr 18, 2012
    I haven't used Bluetooth since Nokia 6230i...

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