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Support Battery discharge when phone is off

Discussion in 'Android Devices' started by victek, Aug 10, 2011.

  1. victek

    victek Android Enthusiast
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    I've started noticing that the battery is down around 15% from where it was when turned off the night before. Is this "normal"? Assuming the phone is actually off that seems like a significant drop when nothing is drawing on the battery. Perhaps when the phone is "off" it's really in a deep sleep mode...?
     

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  2. gangsterazn

    gangsterazn Member
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    I know that battery is used to start up the phone but I don't think that should be close to 15%
     
  3. Masamune

    Masamune Member
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    This is because of the way that the phone charges, it will charge all the way up to 100% and then stop charging until it gets down to is certain percentage before charging again before starting to charge up to 100%. This is done so that the battery isn't damaged from extended charging as its bad for the lion batteries.

    Try doing a bump charge (where you charge until its green, take out the charger, turn off the phone, then charge again until its green)
     
  4. victek

    victek Android Enthusiast
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    That would make sense if I had charged the phone to 100% before turning it off, but usually that's not the case. For instance when I turned it off last night the charge was about 70% and when I turned it on this morning it was at 56% I expect it's normal for the battery to lose a little charge just sitting and perhaps the phone draws more juice when first powering on and reconnecting everything, but I don't really know. I'm just trying to figure out if others see the same behavior - if not then there may be something I can do to reduce the drop.
     
  5. Masamune

    Masamune Member
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    Hmmm, that is interesting, I'll try doing this tonight and give you the update
     
  6. victek

    victek Android Enthusiast
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    I'll be interested to hear. I decided to just turn off the ringer last night and leave the phone on. This morning it only showed a 5% drop in charge. I thought I would be saving the battery by turning the phone off, but apparently it's better to leave it in Standby (with Juice Defender disabling connectivity at night).
     
  7. Masamune

    Masamune Member
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    Ok so I tried this last night (sorry for the late response)

    I turned my phone off at around 2300 at 76%
    I turned my phone back on at around 1100 at 73%

    So I received a 3% drop in turning my phone back on.

    You might just want to pull your battery for when you go to sleep and put it back in afterwards. I'm not sure if you have a defective battery or what. The only reason that I think this could be happening for you is that your battery power is still running a circuit in your phone even when it's off, it's not using juice for anything but the power moving in a circuit is still draining battery life. That's as far as I could tell from my old high school physics class years ago.:rolleyes:
     
  8. victek

    victek Android Enthusiast
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    Thanks, I appreciate your trying this. I'm going to disable the "fast boot" option and see if that makes a difference.
     
  9. vzwuser76

    vzwuser76 Android Expert
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    That's it! It's the first thing that popped into my mind when i read the first post and was about to post and ask you if fast boot was enabled.

    When I had the Thunderbolt I left the fast boot on and shut it off but didn't put it on the charger. The next morning I was down about 15-20%. I called htc & they said that is how fast boot works. With fast boot enabled it's less of a shut down and more of a sleep/hibernation mode. So just like when you put your laptop into sleep/hibernation, it still uses battery, just not as much as if it were fully on.

    One other thing I have noticed is that, with fast boot disabled, when I turn the phone on the power/lock button only takes a simple press to turn the phone on. But, if I do a battery pull, then the power/lock button has to be pressed for about 3-5 seconds to power the phone on. Anyone else noticing this?
     

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