Does leaving on WiFi and BT drain battery

Discussion in 'iPhone' started by MrMister111, Dec 21, 2012.

  1. macrumors 65816

    Joined:
    Jan 28, 2009
    #1
    Does leaving on WiFi and BT drain battery? Im talking when not connected, eg if I leave my home WiFi walk along street where there is loads of home WiFi will the iPhone try to connect or handshake or whatever with them via WiFi and thus use battery?

    On Bluetooth, once I'm disconnected from my cars BT, with BT still on does it constantly search for other BT, or even registered/paired BT devices thus using battery?

    What to people do? Leave these both on constantly all day? Does it shorten battery life? Ha e you tried it on and off?

    Cheers
     
  2. macrumors 68030

    Spink10

    Joined:
    Nov 3, 2011
    #2
    Yes it drains battery
     
  3. macrumors 6502

    chrisperro

    Joined:
    Oct 24, 2009
    Location:
    canada
    #3
    my wifi is on all day,if you using the phone it will search with minimum hit to the battery, if your phone is in standby it won't drain the battery because wifi is off while on standby.
    it depends how old is your iPhone ,i have a 4 and battery remains very strong still ,but if you without wifi for a day or so sure turn it off.
     
  4. macrumors 6502

    Joined:
    Oct 18, 2012
    #4
    For WiFi tun off ask to join networks and it will not drain the battery as much. I leave both on as I connect to WiFi at home and at work and I use BT in my car, so I am sure it drains the battery somewhat but it is minimal. When I travel and I don't take my car, I turn BT off.

    Also, be aware that if you use maps and/or GPS and your WiFi is off, your location will not be accurate.
     
  5. thread starter macrumors 65816

    Joined:
    Jan 28, 2009
    #5
    This will be on an iPhone 5 sorry. So turn off "ask to join networks"? Won't this stop me joining networks though or will I just have to manually?
     
  6. macrumors 6502a

    SnowLeopard OSX

    Joined:
    Dec 5, 2012
    Location:
    Huntington Beach, California
    #6
    In standby, no.
    For general usage, yes.
     
  7. macrumors 6502a

    Joined:
    Aug 21, 2007
    #7
    If it's turned on, it uses extra battery, standby or not...
     
  8. macrumors G5

    ucfgrad93

    Joined:
    Aug 17, 2007
    Location:
    Colorado
    #8
    Yes it drains battery. That said, I leave my wifi on all of the time. I don't have any bluetooth devices so that is never on. My battery usually will last me an entire day.
     
  9. macrumors 6502

    determined09

    Joined:
    Jun 9, 2009
    Location:
    Texas
  10. macrumors 6502

    Joined:
    Oct 18, 2012
    #10
    You will have to join manually.
     
  11. macrumors regular

    Joined:
    Jun 8, 2010
    #11
    Yes, it will drain battery, but not a lot.
     
  12. macrumors 65816

    Joined:
    Jul 29, 2012
    Location:
    Singapore
    #12
    Yes, it will have an impact on battery impact, although the significance of the impact will differ.
     

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