Saturday, March 18, 2006

As more people are updating their device with AKU2, questions are coming up about
battery consumption on the device. The consensus is Direct Push will consume a larger amount of battery compared with the old method (SMS), where we are seeing about a 15% depletion over 2G protocols and and a 30% depletion for 3G protocols (just for the heartbeat.) If your seeing excessive decline in battery usage after enabling Direct Push you may want to check the time-out value for HTTPS connections on your firewall. MS recommends setting this to 30 minutes as anything less could un-necessarily cause your device to resend additional heartbeats (thus draining the battery quicker.)

This KB talks about the setting in more detail:

http://support.microsoft.com/Default.aspx?kbid=905013

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