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Support What is the 'stand by' & 'idle mode'?

Discussion in 'Android Devices' started by kitu34, Sep 26, 2012.

  1. kitu34

    kitu34 Active Member
    Thread Starter

    May 15, 2012
    Hi Folks! I have some battery problems and i do accept that i do check my phone very frequently.Done deep sleep study at night and it hovers between 95%-98% coz i check after the alarm maybe that is why it is not 100%.
    But whenever i check battery usage i find only stand by and idle mode consuming most of the battery.
    But what that exactly mean?I will be really thankful if someone answer this in detail,though i have taken few other measures and even installed a different kind of battery saver which has really helped but still there is problem.
    Many apps suggested that my battery is in good condition,but dont know if there are other levels or stages of battery like 'very good' & 'excellent' and mine is at the lowest hehehe.Thanks.


  2. Hadron

    Hadron Well-Known Member
    VIP Member

    Aug 9, 2010
    Spacecorp Test Pilot
    Dimension Jumping
    98% deep sleep is about the most that's ever achievable. I don't know in detail what events will require waking the cpu (network handshakes, for example) but there are plenty of processes which might want to make periodic updates. I'd really not worry about that.

    It's been a long time since I ran Froyo or HTC Sense, but on my ROM if you click on those items it tells you what they are. "Standby" is presumably the cellular radio standby, so you'll only reduce that by selecting airplane mode (or moving to somewhere with a stronger signal if your signal is weak). Idle is power consumed when the phone is idling (yeah, pretty useless definition, but short of turning the thing off it's going to use some power even if only to maintain the circuit that will generate an interrupt if you press a button). If you are at 98% deep sleep it's about as good as it can get.

    So in itself what you've said sounds like nothing to worry about. Now if you tell me that cell standby is 90% and idle 10% I might ask whether you have a weak signal (on my phone the ratio of standby to idle was 3:1 today, and it spent maybe 80% of its time idle, mostly in good signal but part of the time in weak/out of cover). But then if it's actively searching for a signal that might wake the cpu too.

    So what sort of battery problem are you having?
  3. kitu34

    kitu34 Active Member
    Thread Starter

    May 15, 2012
    Thanks and sorry to reply little late.Yeah i am using juice defender now,earlier i was using easy battery saver in which you can configure apps to allow internet access,it works but has some basic problems so uninstalled.
    About battery usage,phone stand by and idle is 40-50 each.But now since one hour unplugged idle is 4% coz i have been using the phone since.
    I even doubt my phone is not giving the right readings coz sometimes it shows last unplugged back to the previous day though i did it an hour back.
    And every app i have give different reading about the apps memory,some is at least three times higher including Astro.Avast and Android assistant is the lowest.But how can some apps show 3 to 5 times higher than others i don't understand,hence the confusion also continues.
    TAKE A LOOK AT THE FOLLOWING FIGURES OF WAKE LOCKS BY ANDROID SYSTEM, AROUND 6000 WAKE LOCKS WERE TOO MUCH AND THERE WERE OTHERS ALSO WHICH ATTRACTED MY ATTENETION: I took this reading from an app,though i dont understand the cpu time they show in seconds is or how much time spent is ok?But wake locks shocked me and i asked the developer few times but he would answer other questions and duck this and once i was told than my phone is not reading properly that was when my phone showed it spends 100% time on good signal and zero on others.

    Android System
    Sep 20, 2012 4:13:47 PM

    Usage Details
    CPU Usage: 33s
    CPU Usage (Minus Foreground): 14s
    Keep Awake: 1h 17m 39s
    Number of Wake Locks: 5898.0
    Number of times waking device: 22.0
    Light: 14s
    Included Packages
    Bluetooth Services
    Included Processes

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