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Push notifications: Back in test mode [iPhone]

i was reading a review of push notification apps the other day, and my present situation started to fester. for those familiar, i’ve had to keep push notifications turned off in order to prevent rapid battery life loss and issues when charging my iPhone. reading about how others are enjoying push in some respects is frustrating, because there is really no sound reason why my issues are caused by push notifications.

push notification settingsiPhone charging

so i buckled and decided to enter into another round of testing out settings, etc. all the while knowing that this could be painful (even possibly result in being potentially phoneless for a period of time. i re-enabled push notifications for foursquare, and opted to keep AIM (download on iTunes store) and Yahoo! Messenger turned off for the time being. what resulted was exactly as expected — rapid battery loss (down to 25% within 45 minutes off of the charger and minimal use) and charging issues (phone ceased to charge beyond both the 25%, 50% and 75% thresholds).

NOTE: people will question what that means (“If you couldn’t charge past 25%, how did you test the 50% and 75% points?”). with two simple methods:

  1. the jiggle technique: by unplugging the phone and re-plugging it in repeatedly, i could occasionally trick the phone into charging beyond the 25% point. this is hardly rock solid, and frequently failed to work.
  2. restore, restore, restore: for whatever reason, running a restore would override this bug and the phone would remain in charge mode throughout the restore process. often, the restore would last long enough to get the phone back up to nearly full charge. this provided a clue.

you see, i noticed that each restore would render the bug moot, but when faced with the decision to restore from a backup, the bug would resurface in the subsequent syncing of older data. could the issues reside in a corrupted backup? once the restore sync completed, the charging and battery life issues seemed to stick now, regardless of whether push notifications were on or off.

this led me to the next step in my testing process: erase all data on the phone (not just a software restore), and then set up the phone as an entirely new phone. this is a hassle in that all accounts would need to be reconfigured (email, etc.), but that’s a small price to pay for a more stable phone if it works. if it doesn’t, i’ll be taking yet another trip to the genius bar.

i’m pushing the phone to the limits to test this out, so i’ve activated location services, push notifications, and 3G. if battery life is better under these settings, it means i’m onto something here. so far the test has been going well. sometime (before 7am) we experienced a power outage, which means while the phone was on a charger, it was not being charged. all signs point to it having reached full charge, as it was full when i retrieved it this morning at around 8:30 a.m. since then, i’ve had an AIM conversation via push notifications, ran out for bagels at 9:39 a.m. (where i reclaimed mayorship using foursquare), read several blog posts, took photos, uploaded to flickr, tweeted, grabbed coffee, and returned home at about 11:19 a.m. once home, i took a snapshot of my battery life, which at ~25% after a little over two hours of heavy use seems like an improvement. mind you, i was seeing a drop to 25% of battery after 40 minutes of light use (3G off, location off, and push notifications on).

i’ll continue to monitor, and will report the latest on the blog as it develops.

in a slightly related note: Sarah Lacy posted about waning Apple fanboy-ism over on TechCrunch this morning. with the recent issues over Google Voice and other unapproved apps, i’m sure functional issues like these only impact blind devotion to Apple further. it’s my feeling that no one should be blindly devoted to anything. period. a critical eye is important to maintain — otherwise films like The Curious Case of Benjamin Button end up getting a free pass from Fincher acolytes.

Category: iPhone

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  • This is why switched away. There are too many issues with the iPhone and this is one of the bigger ones. My Blackberry Bold has push enabled on my mail and I can squeeze out three days on a single charge. If I turn on push for Yahoo messenger and Google Talk, then I can get a day and a half. With my old iPhone, I had to turn off push email because it drained my battery and I couldn't get a full day with it on. That makes it pretty useless. I also like the hardware keyboard instead of software keyboard. And no, a digital compass doesn't make up for the lack of hardware keyboard :)
  • re: battery issues -- 100% agreed.

    re: physical keyboard -- as i've stated many times over, this is not an issue for me. whether my next phone is from apple or another company, physical keyboards are not a selling point for me. but i can understand why someone would feel this way.

    re: push mail -- for the sake of clarity, the issue doesn't crop up with push mail, only push notifications (apple's "solution" for background apps). there is a difference in battery life between push mail on/off, but for that i differ to re: #1.

    re: compass -- i made fun of this as well, but looking at the augmented reality work being done, i retract that. i doubt apple had the foresight to predict the layering of social data on real images/video when they dreamed up the compass, but the teams putting those apps together get a huge nod from me. impressive stuff, and any future phone of mine will definitely have a GPS/compass combo to take advantage of that stuff. i would argue that AR trumps physical keyboard...for me. again, just a preference thing.

    lastly, i'm working on a follow up to this post. it seems my charging bug has returned, so i'll be seeing a genius bar in the near future.
  • re: it seems my charging bug has returned, so i'll be seeing a genius bar in the near future.

    from my experience with the "genius" bar is that they'll ask:
    1) did you backup your data? if you say "yes":
    2) can we restore your iphone?

    and that's about it.
  • hmm, that's odd. last time I went in the verified my restores and gave me a new phone. I've also heard from colleagues that issues have been met by replacing 3G with 3GS. we'll see what happens.
  • David Tom
    I am seeing the same battery life issues. I was thinking I'd try to delete all the apps until I can figure out which one is causing the problem. I did a restore but have not sync'd all my data back yet and the battery seems to be lasting longer. I know if I sync, I'll have to try the delete apps game. Annoying.
  • a complete wipe totally makes a difference. the trick is, don't restore from a backup. re-sync your apps, just don't restore from a backup and see if that helps.
  • David Tom
    did the wipe and re-sync'd apps and data. I'll let you know what happens but I am already at 59% and it's only been on for 2 hours...not looking good.
  • did you set up the phone as a new phone, or restore from a previous backup?

    mine has been doing pretty well with 3G off. i had the hiccup with the charging issue the other night (see the most recent post), but that hasn't happened again...yet.
  • David
    Set up as a new phone per your instructions. Took a bit of time since I have CalDev Calendars set up...

    BTW, mine is a 3GS if that makes a difference. Push is off. 3G is ON dammit:)

    Hope this is addressed in the next update.
  • David
    UPDATE: Your method seems to have worked:) I am at 88% with moderate use and its been off the charger since abut 7:30 am.

    I did notice some crazy battery % behavior yesterday though. Twice it went down to 20% only to recalibrate back to about 50% each time. I had it down to 13% before I plugged it back in before I went to bed.

    Anyway, thanks for posting about this issue!
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