1. Wren Stimpy's Avatar
    Title says it all:
    Toast says 100% charged, unplug to save energy bla bla, but upper right corner and Battery says 95%.

    Dont know if related but it started immediately after I turned on Pass Code PIN lock for the phone.

    Turbo Charging actually stops Turbo mode on the DT2 at 97%, then Normal charges to 100% , THEN trickles between 99% and 100%. (say trickles here, but it isnt trickle, it is topping, very different from trickle, trickle isnt used in the Li-Ion world)

    The "Fully Charged" message NEVER appears until it is at 100% in the upper right corner readout. This "Fully CHarged" message BEFORE 100% is NEW. Never happened before today. The toast popping up before 100% is not normal.
    This toast has never popped up incorrectly since first day of release of the phone, same day I purchased it.
    05-30-2016 02:26 PM
  2. doogald's Avatar
    There is a point somewhere just above 90% where the phone will slow the charge down to 100% and then stop charging altogether until it reaches that charge level (93%?). The phone and circuitry consider it fully charged but allow a slight discharge to that level in order to protect the battery cells, etc., from heat, overcharging, etc.

    So, it's probably perfectly normal. If you unplug and then plug back in a minute or so later, it will probably start trickle charging to 100% again.

    See Charging Lithium-Ion Batteries – Battery University for more info about this.
    05-30-2016 03:02 PM
  3. Wren Stimpy's Avatar
    "The phone and circuitry consider it fully charged" No, that is incorrect. There is not phone circuitry that affects charging. The phone can only report what it reads from the the battery. If it reads 95% it reports 95%. All charging circuitry is contained within the charger itself - that is just a fact.
    This may be a matter of a faulty charger and seems more likely.
    05-30-2016 03:23 PM
  4. doogald's Avatar
    Did you read the link?

    The battery does not have a sensor that reports charge state - the phone charging circuitry figures out the charge state based on how much voltage the battery is drawing vs how much the phone is draining and watching the temperature. In order to protect the battery from overcharging, when it reaches what it considers 100% it stops charging and allows it to drain a bit before applying a small charge again (what people call "trickle charging".) Applying charge to a lithium ion battery pack, however small, when it is fully charged can be very dangerous.
    05-30-2016 03:39 PM
  5. Wren Stimpy's Avatar
    Did you read the link?

    The battery does not have a sensor that reports charge state - the phone charging circuitry figures out the charge state based on how much voltage the battery is drawing vs how much the phone is draining and watching the temperature. In order to protect the battery from overcharging, when it reaches what it considers 100% it stops charging and allows it to drain a bit before applying a small charge again (what people call "trickle charging".) Applying charge to a lithium ion battery pack, however small, when it is fully charged can be very dangerous.
    Did you read what I wrote? I NEVER said the battery has a sensor in it that reports charge state. Phones do NOT have charge state circuitry whatsoever. Phones DO read battery voltage FROM THE BATTERIES VOLTAGE OUTPUT IN REALTIME and the PHONE reports that TO THE USER.. But that circuitry does NOT affect charge rate. Only the charger does that. Circuitry IN THE CHARGER keeps the battery from over charging, circuitry IN THE BATTERY also prevents this by reporting its size/capcity. NO circutiry in devices ever prevent nor read this, UNLESS a propretary battery is used, such as in MOTOROLAS (how many times have we seen the message "Battery missing or non standard battery present" after installing a higer capacity 3rd party battery in a moto phone?)
    . Devices can measure heat, yes, but they can NOT stop a charging cycle due to that heat - a phone CAN however shut a phone OFF to mitigate any heat damage. Perhaps phones will be able to communicate with chargers in the future, presently isnt happening.

    A charger knows when to stop when it cant charge anymore; when the resistance rises to the level that the BATTERY circuitry states - if a battery says "I am a 3400mah" that is what the charge will adjust to - if the charger can. THe Turbo Charge for the Droids CAN and do just that. This is why you can charge a higher capacity battery in the same phone (if fitted properly by design) and that battery will charge fully - a larger capacity will take longer, of course.

    I li-ion battery will NEVER overcharge UNLESS the charger is faulty, and most modern charges fail safe to OFF trather than FULL CLOSED circuit - the phone can NOT prevent that. As a matter of fact, when a phone reports a battery is at 100% it actually is not at 100%. But battery university has a great article on that very subject. But, I dont want to further confuse you.

    BTW, the BATTERY INDUSTRY calls it "trickle", not just laymen.

    OMG< that last thing you said? "Applying charge to a lithium ion battery pack, however small, when it is fully charged can be very dangerous." No, as you said yourself, a full or near full charged battery will trickle, which is true.

    You are quite confused on maNY PARTS REGARDING CHARGING, CHARGE RATES, CHARGE PROTECTION.

    You need to read many more articles from your link.

    From the link you provided:
    "...manufacturers of Li-ion cells are very strict on the correct setting because Li-ion cannot accept overcharge. The so-called miracle charger that promises to prolong battery life and gain extra capacity with pulses and other gimmicks does not exist. Li-ion is a “clean” system and only takes what it can absorb."

    Li-Ion CAN NOT ACCEPT OVERCHARGE - that isn't a safety statement, that is a factual statement. YOU CANT OVER CHARGE a Li-Ion battery because it is not possible to overcharge one BY DESIGN. You read that wrong.
    Li-Ion only takes what it CAN absorb, meaning it canNOT take any more by design - that isn't a warning of any kind. It is more of a heads up "Don't try it, because it wont work, you will gain nothing from trying to overcharge it". You read that wrong as well.

    And, from the same article, trickle has no place in Li-Ion. Topping, however, does. Topping is NOT trickle - they are NOT related. Also, from your link: "Some Li-ion packs may experience a temperature rise of about 5ºC (9ºF) when reaching full charge. This could be due to the protection circuit and/or elevated internal resistance." BATTERIES HAVE THEIR OWN PROTECTION CIRCUITS AS WELL.

    This proves you did NOT read the whole article - you stopped at the point in which you THOUGHT you were correct and made incorrect assumptions. That said, they need to re-write the article, it is rife with grammar errors that would fool a 5th grader in an AP English class.

    And before you rebut with the last paragrpah, "Chargers for consumer products go for maximum capacity and cannot be adjusted; extended service life is perceived less important." Yes, adjustments to prevent 100% charge, which isnt necessary really - can only be made with special chargers, and then, the battery has to be removed in order to take advantage of special chargers,. Droid Turbo 2 battery removal is MUCH more difficult than with the Droid 1 through 4 series.

    Also, "the battery becomes unstable if inadvertently charged to a higher than specified voltage" Of course. But no consumer charger can inadvertently cause overcharging, even a faulty charger is highly UNlikely to cause overcharging.

    Finally, for now, this article has NO report on how TURBO charging works, and Turbo Charging is QUITE different than previous standard voltage and low voltage Li-Ion charging. The Moto charges that come with the DT2 can do any of ALL 3 types.
    05-30-2016 05:41 PM
  6. TJA3500's Avatar
    My ears hurt and I have a headache.
    Lucy Davies likes this.
    05-30-2016 09:11 PM
  7. Jaingo5150's Avatar
    I would think a simple "you might be wrong" would suffice, then move along. Those random capitalized words to create drama lose any validity you may have though.

    As for the battery, maybe toast is wrong for some reason?? Could be a very simple issue. Did you try a reboot to see if that changed it?

    Posted via the Android Central App
    05-31-2016 12:44 AM
  8. Almeuit's Avatar
    Mod Note - Let's all take it down a notch. People come here everyday and try to help out when they can and sometimes they make mistakes. We all do -- it doesn't mean you should jump down their throat for it. That isn't very welcoming and simply isn't needed.
    adayoff likes this.
    05-31-2016 11:33 AM

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