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battery life

Discussion in 'Android Devices' started by gitman, Apr 13, 2012.

  1. Tokenpoke

    Tokenpoke Android Expert

    Actually I used root explorer to move the LP apk to /system/app so I can remove twlauncher and still perform a factory reset.

    Idk about the lte options other than on and off. The volte tip was provided by chewie

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  2. gitman

    gitman Newbie
    Thread Starter

    i would tend to think attach and detach will bring up / tear down your data session
  3. phoneturf

    phoneturf Newbie

    I don't know if this was ever resolved, so figured I would chime in since I have been looking at wakelocks for a while.

    If you use a charger which is compatible with Apple products, it will cause the vbus_present wakelock since Apple does not adhere to USB standards and requires two of the pins to be bridged or open (can't remember which) to work for their products. However, when you charge a device that does adhere to USB standards with one of these chargers, it will cause the wakelock (on all the samsung phones I have seen, anyway).

    Another downside to using an apple compatible charger is that you can never get more than 500ma out of it due to the non-standard USB connection, even if the charger is capable of 2000ma output. So you get slower charging.

    When you are connected to any charger, this wakelock will be present. If you use an Apple compatible charger, it will persist after you unplug it and will drain your battery around 10% per hour since it prevents it from going into deep sleep. You can clear the wakelock by rebooting the phone or plugging it into a standard USB charger, such as a PC or Samsung charger, even for a few seconds.

    You can use Better Battery Stats to see the effects of this wakelock. Note that it can take a few minutes to show up once you have unplugged from the apple charger.

    Yes, this really p*sses me off. This is one of the reasons I no longer have any Apple products in my house and long since thrown away all the Apple compatible wall chargers I once had. It still comes back to bite me since I still have a couple of chargers that contain batteries to charge when you are away from a wall outlet and they both cause this. When I use them I just have to make sure I reboot afterward. The USB outlet I have installed behind the stereo in my car also causes this wakelock. I have one to replace it but have not gotten around to removing the stereo to do this yet.

    The next best solution to never using an apple compatible charger at this point would be to have a kernel that addresses this and removes the wakelock after it is unplugged but I don't see this happening.

Samsung Galaxy Attain 4G Forum

The Samsung Galaxy Attain 4G release date was February 2012. Features and Specs include a 3.5" inch screen, 3MP camera, 512GB RAM, processor, and 1650mAh battery.

February 2012
Release Date

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