When the power is on the TP2 the red LED charge light is on. the icon in the task bar changes to show that it is plugged in. but after sitting for hours the battery only drains further. If i power the TP2 down plug it up the red LED comes on and the battery charges fully to 100% then goes to green. I have bought new battery and charger. any ideas? note it is allowed to charge via usb in the settings. thanks folks
This is NOT a issue. It's a feature.
Phone does charge to 100%, but later the electricity is cut off until it reaches ~95% (or something like that). It prevents the battery from overcharging and saves important battery lifetime cycles. If it would be charged constantly from 99% to 100% the battery would be dead in a month.
This is going to sound ridiculous, but I have to say it anyway.
I have a Samsung Galaxy S2 (SGH-i777), and I have two charging cables. A U9, and a U2.
When I charge the phone overnight with the U9 cable, I get a 100% rating on the charge, but the battery dies VERY fast. I unplug the phone at 7am, and it's down to 70% by 10am with very little use.
When I charge the phone overnight with the U2 cable, I get a 100% rating on the charge as well, but then the battery dies very slowly, the way I prefer it. I can use the phone moderately all day, and still have a good 30-40% when I get home after 5pm.
Clearly, I use the U2 cable, as this achieves my goal. My question is, why does it work this way? Is there something wrong with the U9 cable? Does it charge the battery differently than the U2?
Check what kind of charging the phone recognize "USB" or "AC". If it is USB the charging is slower (450mA) when AC is faster (650mA).
flash608 said:
Check what kind of charging the phone recognize "USB" or "AC". If it is USB the charging is slower (450mA) when AC is faster (650mA).
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I'm not quite sure what you mean. Is there a place in the menu of the phone to check for this?
I used to use the wall-outlet adapter with the U9 cable. Now I am using the same wall-outlet adapter with the U2 cable.
It`s hidden in Settings -> About Phone -> Status -> Battery Status (AC/USB)
Shibblet said:
I'm not quite sure what you mean. Is there a place in the menu of the phone to check for this?
I used to use the wall-outlet adapter with the U9 cable. Now I am using the same wall-outlet adapter with the U2 cable.
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When you connect the usb cable the phone says that is connected like a media device and a usb symbol appear in status bar and notification area, it means that are charging at 450 mAh (like usb connected to PC), but if only see a charging battery indicator then is charging at 650 mAh (like Power AC Adapter).
But I really dont know if the charge duration is affected, maybe is overcharging your battery. Try this, charge until 100% with both, but disconnect it when the phone says that charge is complete and try. Maybe with the time the battery is overcharged and has more battery with one of the cables.
At a molecular level, the slower charging is more thorough and actually deposits more charge (energy) into the battery, which is why a slow charge rate results in a better performing cell or battery. Remember, batteries (or cells; a battery is just a collection of cells) change energy from chemical to electrical when providing power, and accept energy when being charged by converting electrical energy to chemical energy. That chemical change doesn't happen instantaneously, and is why a slow charge can actually raise a cell or battery's energy level higher.
Generally, the charger measures the charge state of the battery by the voltage of the cell or battery, and charging slowly allows the charge to more thoroughly dissipate through the cell. Rapidly charging, on the other hand, builds potential (voltage) quickly, but the quick charging doesn't allow the chemical change to occur thoroughly throughout the cells, and misleadingly indicates a higher voltage (charge state) than has actually occurred.
Think of the game of Tetris: When the blocks (incoming electrons) are falling slowly, it's easy to pack them tightly and fit more into the play area (battery). When they're coming in quickly, eventually you become unable to fit them all tightly without leaving voids, and the height of the stack (perceived charge level, or voltage) reaches the threshold without being fully packed (charged).
I hope this helps, four years after the question --Mike Jernigan, Greensboro
EightOhMike said:
At a molecular level, the slower charging is more thorough and actually deposits more charge (energy) into the battery, which is why a slow charge rate results in a better performing cell or battery. Remember, batteries (or cells; a battery is just a collection of cells) change energy from chemical to electrical when providing power, and accept energy when being charged by converting electrical energy to chemical energy. That chemical change doesn't happen instantaneously, and is why a slow charge can actually raise a cell or battery's energy level higher.
Generally, the charger measures the charge state of the battery by the voltage of the cell or battery, and charging slowly allows the charge to more thoroughly dissipate through the cell. Rapidly charging, on the other hand, builds potential (voltage) quickly, but the quick charging doesn't allow the chemical change to occur thoroughly throughout the cells, and misleadingly indicates a higher voltage (charge state) than has actually occurred.
Think of the game of Tetris: When the blocks (incoming electrons) are falling slowly, it's easy to pack them tightly and fit more into the play area (battery). When they're coming in quickly, eventually you become unable to fit them all tightly without leaving voids, and the height of the stack (perceived charge level, or voltage) reaches the threshold without being fully packed (charged).
I hope this helps, four years after the question --Mike Jernigan, Greensboro
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4 year? You waited 4 year ???
I feel that my phone seems to charge a lot faster when it is turned on than when it is turned off. I heard that having the phone on when charging is bad for the battery because of parasitic charging.
I read on the Sony support site that leaving the phone charging for an extended period of time won't affect the battery and charging often won't affect the battery's lifespan, which contradicts what I've read about li-ion batteries in general.
So basically my question is: is what the Sony website says true and is parasitic charging really that bad or a difference-maker in terms of battery health because it is annoying feeling pressured to turn off phone when charging.
pkim87 said:
I feel that my phone seems to charge a lot faster when it is turned on than when it is turned off. I heard that having the phone on when charging is bad for the battery because of parasitic charging.
I read on the Sony support site that leaving the phone charging for an extended period of time won't affect the battery and charging often won't affect the battery's lifespan, which contradicts what I've read about li-ion batteries in general.
So basically my question is: is what the Sony website says true and is parasitic charging really that bad or a difference-maker in terms of battery health because it is annoying feeling pressured to turn off phone when charging.
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No my frnd, these things dont affect our phone. U DO NOT NEED TO TURN UR PHONE OFF for charging. Sony ppl r right, li-ion batteries r not affected by parasitic thingy. Most probably, u have read/heard wrong.
Hello.. this might sound alittle bit old question or maybe repeated alot but i couldn't find the answer at the internet..
i held two samsung galaxy note 1 and 4, and i noticed when the battery fully charged i can't see that charging mark on the battery.. WHAT DOES THAT SUPPOSED TO MEAN?
does that mean the system stopped charging the battery and it won't affect on its lifespan? or it is overcharging?
i noticed in Sony Z3 there is option for night charging which is when the battery is full it will automatically disconnect the charging, is that thing the same in samsung but without any option or it can damage the battery because it keep charging??
i hope i can get the answer....
thank you
With the stock charger, or any decent 3rd party charger, it will stop charging when the battery is full and begin again when needed.
It goes off full charge and goes into trickle charge. The phone won't turn off the charger when it's full.
nacron said:
It goes off full charge and goes into trickle charge. The phone won't turn off the charger when it's full.
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Ive always wondered about the trikle charge effect on phones as well as laptops. So wouldnt that damage the battery overtime? Continually discharging a tiny bit and recharging over and over again?
I wish there was a definitive answer to this any many other perpetual questions regarding the current crop of Li-ion batteries..
It's supposedly less damaging to top of a lithium ion battery than to fully discharge and charge.
http://www.techrepublic.com/blog/five-apps/five-tips-for-extending-lithium-ion-battery-life/
When I go to sleep at night, I usually leave my phone plugged in until I wake up. I need my phone to have a full battery when I awake, and this is the only option that I know of. I was wondering if there is a way to force the phone to charge a little more slowly so that it isn't sitting plugged in on the charger with a full battery for a few hours until I wake up, as I understand this can damage your battery and reduce longevity. Anyone have any suggestions?
Maybe you could use a low amperage charger?
With original charger (1.2A if I'm not wrong), it took nearly 6h for my phone to fully charge (while it was new and on factory software). Even the charger is declared as 1.2A, charging current never went over 700mA so you can safely leave it on charger, with no worries... Devices do have a overcharge protection, and simply will stop charging second battery sensor gives "Full" state (you can test that with Ampere - you'll get the charging current and see that even after 100% is reached, battery continues to charge for a while, until "Full" state is set by the sensor). Battery quality will deteriorate no matter what you do - they are made to survive some number of recharging cycles and that's it - mine suddenly started loosing capacity fast, after 2.5 years (or around 1000 cycles), out of blue, and you can just replace it. Same story with other phones I have/had: simply, after 2.5-3y their batteries start loosing capacity rapidly.
I would not recommend weaker charger (under 700mA) because our device has 250-400mA drain during idle, and if you want your phone to be full same moment you're awake, you may get a nasty surprise of "Charging" status Anything around 1A is more than enough.
Thanks so much! That answers my question.