1. Are you ready for the Galaxy S20? Here is everything we know so far!

The Truth About Your Battery

Discussion in 'Android Devices' started by Easilyamused, Sep 17, 2012.

  1. jessOTR

    jessOTR Newbie

    Would Gmail do that? I wish I could tell it to check frequently during the day, but never between the hours of like 10pm and 8am or something like that. I have FB set to never updating.


  2. jessOTR

    jessOTR Newbie

    Well, yesterday the same thing happened to my husbands brand new S3. I'm convinced a Maps update did it. He was at work all day (he's a nurse). Left the house at 6am and got home at 8:30pm, and had a really busy day with very little phone use.


  3. gregg1100

    gregg1100 Android Enthusiast

    I had recently done a factory reset, but I must have done a tame one, because all my contacts, songs and pictures turned up. So will do another.

    But before I do that, I have wiped all the possible apps from the home screens that could cause aggro. But as they are all in the app list, are they still active, or are they active only when dragged to home screens.??

    How do I post GSam screenshots here, please? Got them sent to pc, but when I try to copy into the post, zilch happens.
    All I have on home page is email, gmail,camera,playstore, settings and GSam.
    Thats all that is in any of the screens. Power saving on---I turn off Data and WiFi off at night. Should I cut email retrieval sync times as well??
    Until I understand what causes the drain, them I will keep phone bareboned, but hope I can detect fault soon, as the phone is about as exciting as a dead kipper.
  4. funkylogik

    funkylogik share the love peeps ;)

    The icons on the homescreen are simply shortcuts to apps mate so it makes no difference whether you have them on homescreen or not, theyre still in the phone. what did you do to trigger the factory reset? Reset will only delete stuff on the internal memory. Pics, music etc on an external SD card (if you have one) wont be deleted and contacts are syncd to the cloud so theyll come back after a reset :thumbup:
    jaymzway and gregg1100 like this.
  5. gregg1100

    gregg1100 Android Enthusiast

    Just done the factory reset and not doing it again, or worrying about whats eating into what. :thinking: If the battery lasts 10 hours or 10 minutes, I will just plug it into the wall charger. What a kerfuffle- putting all the passwords back again.
    I have a spare battery, so will swap over when needed. :)
    Thanks for help,
  6. ScandaLeX

    ScandaLeX Wasn't Me

  7. EarlyMon

    EarlyMon The PearlyMon
    VIP Member

    No - and that's a good question because it touches closely to other things that are important here.

    I'm offering the full story - or you can skip down to the TL/DR at the bottom. :)

    The full story -
    Virtual Machine

    I mentioned that the Dalvik's full name is the Dalvik Virtual Machine.

    Let's look at what a virtual machine is - simply put - that's a software computer inside of a computer.

    In the PC world a famous example is a thing called Virtual Box - it's an app - install it on your PC or Mac and it emulates a PC, into which you can install another operating system.

    I'm typing this on a Mac right now. I have two windows on my Mac, inside one is a full copy of Linux and inside another is a full copy of Windows XP. Both Linux and WinXP think that the Mac that they're really on is just another computer on their same network.

    I'm not _emulating_ (pretending to run) Linux or Windows and I'm not dual-booting -> I'm actually running those two operating systems at the same time as Mac OS X, inside of virtual machines.

    Because software believes whatever you tell it - tell it that its environment is a computer, it believes you - even if it's really a made-up computer in software.

    Javascript, Java and the JVM

    As you know, your browser runs Javascript - simple applets made to run on a browser. The next step up are Java programs - they run on nearly anything, just like with a browser, not caring if on Win, Mac or Linux.

    But in order to run Java programs on your desktop (nearly everyone in fantasy football does this to keep track of their teams and leagues) you install the Java Virtual Machine (JVM) on your PC.

    The JVM isn't all general-purpose and a blank piece of paper like Virtual Box - it's a virtual machine designed to run only Java apps but on any choice of operating system.

    The Dalvik Virtual Machine

    You may be aware Android apps are written mostly (+90%) in Java, the rest in "native" code (C/C++).

    The DVM is like a mobile JVM except - 1) runs only on an embedded Linux with Android mods to the Linux kernel (the lowest piece of software on your phone or PC - the thing that makes all the other pieces work) and 2) it can run Android-Java or native apps.

    It's one of the most advanced virtual machines ever dreamed up.

    What the Dalvik allows that nothing else does

    Droid Den
  8. wrx2005

    wrx2005 Lurker

    This may be my 1st post in this forum. I want to thank you for the informative and thorough posts. I've learned a lot. What brought me here is, I recently purchased a Hyperion extended battery for 2 phones. One for a Galaxy S3 and the other for a Note 2. The S3 ext battery is awesome, whereas the Note 2 battery is the same if not worse than my stock battery in terms of battery life. I contacted Hyperion and they responded within a couple of hours. They said they will send out another ext battery for my Note 2 and for me to keep the "poor performing battery"

    Again thanks for your help in helping others.
  9. EarlyMon

    EarlyMon The PearlyMon
    VIP Member

    Welcome to the forums! :)
    wrx2005 likes this.
  10. wrx2005

    wrx2005 Lurker

  11. wrx2005

    wrx2005 Lurker

    I havent read much about anti virus apps causing problems......but since folks here are deep into talking about apps and processes draining their batteries......I have 2 questions about Avast Anti Virus app that I have installed on my Note 2 ( It's rooted ).

    On occasion I have noticed my Avast causing my SuperUser app to trigger the need to awake my screen and ask for "grant access" to Avast AV. I havent run any tests, but Im willing to bet Avast AV running in the background may contribute to a certain amount my battery drain. The questions are......how much battery power is Avast AV using when it is running? And the other is.......is it necessary or a good idea to use an anti virus program for my android phones? If it isnt necessary, I may disable Avast and only use it when I am interested in running a scan.
  12. gala5

    gala5 Lurker

    Thanks a lot for this post! Maybe a similar guide for a total Newbie would be helpful. I've already googled but couldn't find any help...

    I got my Samsung phone just a few days ago and was shocked when battery goes down by 40% overnight without me having done anything to it yet...

    GPS, WiFi and Data has always been off (my plan is not set up yet).

    >80% is used, according to Battery, by "Android OS". I have not yet installed any apps myself.

    So what is the problem here? On a fresh-from-the-factory phone, this should not be happening? Or are there some apps in the background constantly trying to connect and not finding any connection? How do I tell them to stop doing that? I cannot use any data for the next week but need to be able to rely on a phone for making calls...

    Also, in the Application Manager, there are quite a few apps under "Running", do I need all of them? I did not start them myself...

    A similar situation might happen when you are travelling and don't want to use Data so you don't pay for Roaming and there is no WiFi.

    >>> So long story short: Say you want to use the phone ONLY for phone calls and text message... what settings will maximize your battery (and keep it from draining by 40% overnight)??
  13. jreink01

    jreink01 Android Expert

    Try deep sleep battery saver, when my phone is off, it automatically turns off data.
    funkylogik likes this.
  14. funkylogik

    funkylogik share the love peeps ;)

    Or if youre rooted, check out Greenify
  15. jaymzway

    jaymzway Android Enthusiast

    I will also add to that
    I'am never so sorry that I'am reading this now and not back then
    I know it's an old post but this is a great post excellent write up bro...
    I only now have a much clearer understanding onto how the system uses my phone battery... This is some Awesome Shiz!!!! Big Thanks To You Bro..
    Thank u earlymon :beer::D

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