Notifications On and Push Off = battery drain?

Discussion in 'iPhone' started by ddavid, Aug 31, 2010.

  1. ddavid macrumors regular

    Jan 4, 2008
    I want to have Notifications on in order to use Find My iPhone using MobileMe. Does anyone know if having Notifications on while having Push off for every App and email account affects battery life?

    I know that using Push drains the battery but don't know how having Push on but not using it affects the battery.

    Anyone know?
  2. Eso macrumors 68000


    Aug 14, 2008
    With Notifications turned ON, a connection with the PNS is maintained so your battery drains whether or not any apps are using them or not.
  3. ddavid thread starter macrumors regular

    Jan 4, 2008
    What is the PNS?

    I found it...
  4. err404 macrumors 68020

    Mar 4, 2007
    It's a server at Apple that your phone is in constant TCP/IP communication with. There is an open port that your phone is listening on for any requests. The problem is that 3G data is not always reliable and may be blocked over some wifi networks.
    Personally I always thought it would have been better (more reliable and less battery) to have Apple send an invisible/encrypted SMS messages telling the phone to initiate a pull from the PNS (even tough this would charge against your SMS allotment).
  5. TBONE72 macrumors regular

    Sep 25, 2007
    You do not need Push Notification or e-mail Push on for MobileMe Find My iPhone to work. I thought I remember Apple saying this when they were talking about iOS4. In fact, I just tested this with both Push services off and I was able to find my phone and send a message to it.
  6. ddavid thread starter macrumors regular

    Jan 4, 2008
    Cool! I just tested it too and it worked with Notifications off!
  7. TBONE72 macrumors regular

    Sep 25, 2007
    My pleasure!
  8. pamon macrumors 6502

    May 12, 2006
    always wondered about this. thanks to the replies. crisis solved. :)

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