Jun
22

iOS4 Battery Life & Electronic Glasses

29 Comments

Posted in Blog
29 Comments Posted by Cali Lewis

29 Responses to "iOS4 Battery Life & Electronic Glasses"

  • Firoze Lafeer says:
    June 22, 2010 at 8:24 pm

    Is your reduced battery life due to Pandora streaming in the background?

  • Cali Lewis says:
    June 22, 2010 at 8:50 pm

    Nope! I wasn’t using Pandora at the time.

  • Shane Graham says:
    June 22, 2010 at 9:22 pm

    How do you exit from an app to save power?

  • Bill Jump says:
    June 22, 2010 at 9:36 pm

    Thanks, good info today.

  • Michael says:
    June 22, 2010 at 10:02 pm

    Cali, I suggest you get (if you haven’t already) a little 99c app called iStat. Launch it, click on Device, and it will tell you exactly what applications are running on your phone as well as the load average and memory usage. hint: almost nothing in the recent apps list is still running.

    Mine is showing a load average of about .35. My experience is that the normal Apple always-running apps like Phone, Mail, Safari, and iPod (called MobilePhone, MobileMail, MobileSafari, and MobileMusicPlayer respectively), the last couple Apple apps (or iOS4 updated apps) are still in the process table.

    I think the way it works is, it keeps the most recent apps around until it needs more memory, then it kills them to free up memory. So you probably don’t need to kill apps from there because they’re probably not running anyway. One big deficiency in the UI is that it doesn’t show which apps are actually running. But some may argue that it’s not necessary.

    As for what’s killing your battery, I don’t know. But iStat can probably give you a good hint.

  • Michael says:
    June 22, 2010 at 10:05 pm

    @Shane,

    If you feel the need to exit an app, hit home twice to pull up the list, tap and hold on the app (like you were going to move it in the springboard) until you see a red (-) in the upper left. Tap on that, and it’s killed.

  • Martin says:
    June 23, 2010 at 12:01 am

    Hi,

    Thanks for the info. I, like yourself, have experienced a dip in battery life. Not EXTREME, but enough to be noticeable.

    Michael, I may well download that app to keep tabs on what it’s using, thanks for the suggestion.

    m.

  • Martin says:
    June 23, 2010 at 12:31 am

    @Michael, is there an obvious location to read up on what the “load” (average or otherwise) actually means? Downloaded app and got a similar average (of the 3 figures) to yourself. While an app update was downloading, first two of the three figures jumped to roughly 1.40 each.

    Currently I’m seeing 0.21, 0.51 and 0.56

    m.

  • Joe says:
    June 25, 2010 at 8:10 am

    Battery life will be drained more by apps that are active cont. with a 3g connection such as Pandora using Muti-tasking,compared to those that only update interm. as needed.
    as apps become updated for ( 4.0) and larger cashing should see Battery life improve.

  • Michelangelo van Dam says:
    June 26, 2010 at 2:25 pm

    Hi Cali,

    Just wanted to mention I experienced also an enormous decrese in battery life after I’ve upgraded my iPhone 3G to iOS4.

    With this 3G I don’t have multitasking, nor most of the fancy features advertised on apple’s website. So I’m kinda puzzled what is draining my battery so much.

    If you come across any mentioning of this with a solution, let me know. In the mean time I think I’m going to downgrade again until this issue is fixed.

    Michelangelo

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  • Michelangelo van Dam says:
    June 29, 2010 at 12:09 am

    Hi Cali,

    Just wanted to let you know I’ve found a way to fix the battery issue with iOS4 on an old iPhone 3G.

    I restored the phone back to factory settings and skipped the part where it asked to restore backups. it now works great.

    Hope this helped,

    Michelangelo

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