3 Replies Latest reply: Dec 12, 2012 10:04 AM by Kejm
RedXJ Level 1 (0 points)

Exchange Active Sync seems to drain battery on both Iphone 4 iOS4 and iOS5 software platforms.  I have 3 users that this is happening to.  Users are on both AT&T and Verizon networks. Exchange is 2003 and the version is 6.5.7638.1.  I’ve tried rebooting the phones (soft and hard resets), redoing push (Deleting the account and re-adding it), and restoring as a new iPhone (as a new iPhone not from backup) with no success.  When you are in the mail account you just see the account trying to sync constantly, the battery drops like a rock, and the battery gets hotter than usual.  This only seems to happen to users after they go away for a weekend trip or leave the geographical area where they live.   I’ve even updated roaming capabilities on the phones.  These are not the only users I have.  Myself for example, I have exchange set to push, I’m on the Verizon network, and I have no problems.  Does anyone know how to fix this issue?

iPhone 4, iOS 5
  • rocketbob Level 1 (0 points)

    I too have the same exact problem.  Upon deleting the exchange acccount and rebooting, battery life returned to normal.  I re-added the exchange account and the battery drain issue reappeared.  This is happening with push turned off and set to fetch every 30 minutes.

  • fdiskwizard Level 1 (5 points)

    I've been looking into this for about a year off and on. More recently it seems to be iPads/iPhones that are the worst. Even the latest iOS 5.x. It does seem to be people who travel a lot and/or jump on/off wireless a lot.

    Deleting the device partnership does at least for a short time, resolve it in most cases.


    I have a little script I run against the logs to show top user syncs. Basically, they do sync constantly all day and night up to 80,000+ hits per day on the ActiveSync frontend server (Exchange 2003), which is about every second or two. I know of a couple of people who got new phones because there battery was dying like crazy. It was just the sync problem killing them.


    Anyone else have any info regarding WHEN this starts happening for a device?

    It also happens with Android and Windows phones. It may be worse on iDevices for us because a lot of the people traveling have iPhones and/or iPads.

  • Kejm Level 1 (0 points)

    Has anyone found a fix to this issue? My users are experiencing this same issue on 4, 4s, and 5. I just recently realized it would start after they were leaving their normal coverage area and here I find this forum. Turning off push and using fetch every 15min will stop the battery drain but I would like them to be able to use push.