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Why unplug when done charging?

Discussion in 'Android Devices' started by VentureForth, Dec 7, 2010.

  1. VentureForth

    VentureForth Well-Known Member
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    When my Captivate is "topped off" it pops up a message - Your phone is fully charged. Please unplug your device.

    Why does it give this message? Can't I just leave the phone on shore power when I can? Is there a way to turn off this notification?

    It's particularly annoying when in the middle of the night it pops up over my alarm clock...
     

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  2. Timberline

    Timberline Well-Known Member
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    Glad you're asking this as I've wondered the same thing.

    It's my understanding that in addition to not suffering from the "memory effect" like NiCd, that they likewise cannot be "overcharged".

    So I'll echo the "why disconnect?" question and if there's no good reason to, "how can we disable the notification to do so?".

    Thanks!
     
  3. DT

    DT Android Expert
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    I think it's simply a "courtesy" notification, like of you were waiting around to make sure your phone has a complete full charge. It also does it a few minutes after the indicator hits 100, so it's like it confirming a real, 100% total charge.

    Hahaha, I have a Growl notification that pops down at the top of my screen notifying me :D
     
  4. mbranscum

    mbranscum Member
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    It's not gonna hurt your battery. I believe it means that it's OK to unplug it now that the battery has charged completely.

    These devices have built-in circuitry to prevent damage to battery by over charging.
     
  5. iffrett

    iffrett Well-Known Member
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    that is interesting as I've never gotten a message like that before. I always charge it overnight and when I wake up, it says 100%...
     
  6. George0211

    George0211 Android Enthusiast
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    I've also noticed that this message lies. I've gotten this message and unplugged the phone and the battery widget would immediately drop down to 98%.
     
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  7. Jack45

    Jack45 Android Expert
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    It's sorta like when you've finished inflating your car's tire and you pull the chuck away from the stem. You lose a little air.
     
  8. Buddha64

    Buddha64 Android Enthusiast
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    DB-0855-03 Aviation Electronics Engineer
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    :rolleyes:
     
  9. willisjm193

    willisjm193 Lurker
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    Haha, true!
     
  10. Jack45

    Jack45 Android Expert
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    I've found that the faster I pull the charger out of the phone's USB connector, the less juice I lose.

    Maybe this should go under "Tips and Tricks."
     
  11. NJR

    NJR Well-Known Member
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    I'll be you charge it when off off then. I charge mine overnight while on, and always have the message in the AM. I agree that it is just a reminder and no harm can be done to keeping it plugged in beyond the motice.
     
  12. Lincoln4

    Lincoln4 Member
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    So, can anyone advise me how to turn off this annoying notification, so that it doesn't wake me up at 2 or 3 every morning?
     
  13. EarlyMon

    EarlyMon The PearlyMon
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    This class of phone manages power just like a laptop.

    When the phone's fully charged, it starts running off of the battery - otherwise, battery damage will result.

    There's some secret low-mark that the phone will hit before the charging cycle starts again. It varies by make and model and has been known to go as low at 92% (mine is 93% for example - I've read yours is 95%).

    So - once fully charged - the phone is using battery to sync data, get email, etc, etc.

    You unplug it, and suddenly see a drop, making you think something's wrong - there's not - this is just standard operating procedure.

    Can't help on the notification - I believe that's permanent unless you root.

    However - go to Sound & Display under settings and try turning it off if it's listed under Audible Tone Settings.

    For nighttime/sleeping comfort - put your phone in silent mode, unless you need it otherwise noisy.
     
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  14. fldude99

    fldude99 Android Expert
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    I have 2 suggestions:.

    1-Don't charge it at night if you want the device close to your bedside

    2-If you want to charge at night, leave it in another room.

    3-Get a spare battery and external charger so you just have to swap the battery and charge the other one at your leisure.
     
  15. ZDroid1

    ZDroid1 Android Enthusiast
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    Which 2 were suggestions? What was the third?
     
  16. Uzza

    Uzza Well-Known Member
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    the purpose of this message is Samsung gs attempt to shoe it cares about the enviorment.

    notice the leaf symbol.

    unplug your charger..save energy.

    lame.
     
  17. VentureForth

    VentureForth Well-Known Member
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    Hmmm.I've always been too groggy to notice. Interesting.
     
  18. mnemonicj

    mnemonicj Android Enthusiast
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    Anyone else notice that the screen on the Captivate also turns on when the the battery is charged enough to no longer be in the Yellow?
     
  19. julie524

    julie524 Member
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    Turn the sound notifications off.
     
  20. VentureForth

    VentureForth Well-Known Member
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    Does the sound notification turn off the visual notification? That's the part I don't like. Waking up at 4 AM and instead of seeing a time on my clock, a notification that my captivate is fully charged, so I better unplug it, bucko.
     
  21. Android26

    Android26 Android Enthusiast
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    Oh really? I guess this just shows how much I don't know about technology. I thought that at full charge, your phone (or laptop) would continue to run on the "juice from the outlet" until you unplug it, to save your battery.

    But looking at it your way, it makes much more sense why a notification would pop up asking you to unplug.

    @Original Post: I don't see how / why you would continue to let the message wake you up. Lol silent mode man.
     
  22. EarlyMon

    EarlyMon The PearlyMon
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    They used to do all of the obvious things - such as you describe, and then at the same time provide a trickle-charge to offset that any battery doing nothing (such as when it's 100% and you're using the wall power) will start to discharge. That's how the old batteries and charging systems worked, from what I've read.

    I've read the change is all due to the new battery tech - but in the back of my mind, I'm sure it has to do with safety and reliability and liability - remember those burning laptop batteries from just a few years back.

    It's my understanding that overcharging a lithium-ion battery WILL cause it to catch fire. Curious, we forced one into ignition in a lab setting - those things don't just burn - they literally burn like a blowtorch.

    No doubt this whole new scheme avoids that by design.
     
  23. artman540

    artman540 Android Enthusiast
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    I left mine on the charger over night and now that notice is burned in my screen.
     
  24. Android26

    Android26 Android Enthusiast
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    I (purposely) left mine phone on the charger longer than it wanted to be on the charger last night. Surprisingly, after unhooking it, the battery percentage stayed at 100 and in the high 90's and 80's way longer than it usually does. a.k.a. it seemed like a plus to me. Is this technique damaging my phone or its battery?
     
  25. EarlyMon

    EarlyMon The PearlyMon
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    I have great confidence in Samsung's power control circuitry - unless completely defective, your battery's fine.

    Power on the battery, while on the charger, if graphed would look kinda like a roller-coaster. Once it hits 100%, it'll run on battery until it hits Samsung's decision for the low point, then it charges to full again, and so forth. The speed and shape of this is controlled by each user's background / running processes (such as mail syncing, whatever) - so yes, it's totally possible to take it off early and have more power - or to take it off late and have more power.

    Murphy's law says that every person always lucky and getting 100% after leaving it on for a while after full charge, there's a matching guy who's always at 95% or so.
     

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