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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 ???
Hey guys,
I've used my HP touchpad charger a couple times now and it seems to drastically speed up charging. I thought I'd see if anyone else had experienced this as well.
Sent from my HTC One using xda app-developers app
I would not recommend using tablet chargers like that. Although it does speed up charging I think you might also wear out your battery quicker.
Sent from my HTC One using xda app-developers app
I would not recommend using tablet chargers like that. Although it does speed up charging I think you might also wear out your battery quicker.
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That's not right. The charging speed is limited by the battery and their charging managemend, not by the charger. If the battery management is configured at 1A it is charging with 1A even if you use a 2A charger.
If you can charge the HTC One with a bigger charger faster than it is not negative for the battery because it's allowed by the battery management. But I don't think, that it is really faster. I will test it for myself later with the 2A Charger from the ipad.
jhonsok said:
I would not recommend using tablet chargers like that. Although it does speed up charging I think you might also wear out your battery quicker.
Sent from my HTC One using xda app-developers app
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I do know where this is coming from but just isn't the case anymore. All batteries made for cells phones in the last 2 years have smart charging chips in them. Meaning they can not overcharge, charge too fast, or discharge too much. These batteries have tech built in that could charge them in about a hour. People think this was disabled to help prolong the life of the battery. This is also false. Fast charging does have a slightly negative effect but we are talking about 2% negative. So if the battery would have went through 2000 charge cycles normally than with a fast charge it would only last around 1180 charge cycles. It's a non difference. It is the reason people have been saying that the fast charge feature is disabled but they have no idea and it sounds good so the community here has decided it to be true.
Now technically it should not matter what amp charger we plug in as the phone should only take a certain amount. Now I know this is false as I also use the 2amp Touchpad charger and can confirm it does charge around 30% faster.
Can someone explain why the power capability of the charger makes any difference?
Rules of electronics. V = IR or in this case I = V/R Current = Voltage / Resistance
By definition if too much current is drawn from the power supply the voltage will collapse. Similarly, at any given voltage and input resistance, the current will never exceed a certain level.
So the worst that can happen is you damage a power supply trying to charge a greedy iPad with an under spec'd power supply.
But I see certain devices that say, never use a 2A charger as it can damage the device? Why? By definition it will never draw more current than the circuit is designed for.....what am I missing?
jonstatt said:
Can someone explain why the power capability of the charger makes any difference?
Rules of electronics. V = IR or in this case I = V/R Current = Voltage / Resistance
By definition if too much current is drawn from the power supply the voltage will collapse. Similarly, at any given voltage and input resistance, the current will never exceed a certain level.
So the worst that can happen is you damage a power supply trying to charge a greedy iPad with an under spec'd power supply.
But I see certain devices that say, never use a 2A charger as it can damage the device? Why? By definition it will never draw more current than the circuit is designed for.....what am I missing?
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Nothing at all :cyclops:
Now if you use a .5 amp you do run the risk of burning it out as the device will try and pull more than .5amp and will succeed putting too much strain on the charger.
AFAIK the charging voltage/amperage is dynamically controlled by software(kernel). Starting from empty the voltage will be higher, but decreasing when battery is getting fuller.
VeixES said:
AFAIK the charging voltage/amperage is dynamically controlled by software(kernel). Starting from empty the voltage will be higher, but decreasing when battery is getting fuller.
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The voltage of the power supply should be a controlled 5V (I know some poor supplies are not so perfect). The only way of changing the current being drawn is to change the resistance , but that would be a constant as determined by the battery itself (its current draw will change depending on how full it is at the time). If there was actually a charge controller circuit in the phone itself, then it should not matter whether you have 2A, 5A or 50A, because it should only ever draw the power it needs. Also if there was effectively a "short circuit" and you tried to draw 2A from a 1A power supply, the power supply voltage would collapse and charging would simply stop. Therefore the charging circuit will have been designed with an expected current flow. As voltage is 5V and the input resistance always remains constant, the charging current can never be more or less than what was intended by design! Of course if the power supply outputs 10V instead of 5V, then it WILL draw more current and do lots of damage!
Think of it this way. If you run at 5 mph, it doesn't matter whether you are 3 feet tall or 6 feet tall, you will still arrive at the destination at exactly the same time.
There are different cables that can be purchased that essentially have just the positive and negative connections in use. This removes the control connections that allow the phone to regulate the amount of power so it allows the device to charge at a faster rate.
I have used these cables for years on many devices and have never had a problem but it is worth noting that I only use them sparingly and the vast majority of the time I use the standard chargers that come with the devices.
MG
Stop with the FUD people, the only thing that matters is the voltage of the charger. It needs to be 5V or else it will damage the phone. Otherwise, the phone will self limit the amount of charge taken in.
Sent from my HTC One using xda app-developers app
Using a higher current charger will degrade the life of the battery faster than normal. It will also be hotter when chraging, thus further degrading the life of the battery.
Bear in mind USB2.0 can only provide 500mA and makes charging slower.
Using a 2A charger ON OCCASION will be fine, but long term use will degrade your battery, it's that simple.
fast charging batteries is not as good as slow charging for the batteries. It's not terrible, but it is worse for their health.
the smart chips in the phones are allowing to be faster charged = faster charge times. HTC probably allowed this because they knew it would pacify complaints about their slow charge.
The htc engineers saw it fit to include the charger they did, they know its charges slow, it's for a reason.
nullkill said:
Fast charging does have a slightly negative effect but we are talking about 2% negative. So if the battery would have went through 2000 charge cycles normally than with a fast charge it would only last around 1180 charge cycles. It's a non difference. It is the reason people have been saying that the fast charge feature is disabled but they have no idea and it sounds good so the community here has decided it to be true.
Now technically it should not matter what amp charger we plug in as the phone should only take a certain amount. Now I know this is false as I also use the 2amp Touchpad charger and can confirm it does charge around 30% faster.
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Your numbers are a little off i'm afraid. If its only a 2% issue from 2000 charges.. you show 1180 to be then new charge..thats almost 50%. 50% would be 1000 charges.. 2% from 2000 would be 1960 Better number for your point
the_scotsman said:
Using a higher current charger will degrade the life of the battery faster than normal. It will also be hotter when chraging, thus further degrading the life of the battery.
Bear in mind USB2.0 can only provide 500mA and makes charging slower.
Using a 2A charger ON OCCASION will be fine, but long term use will degrade your battery, it's that simple.
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Yeah it will degrade it quicker, but not significantly. I agree with the previous posts. Its fine to use a charger with higher amps than needed but its not good to use lower amps. (lower than 500ma) Lower amps will kill chargers quick. If usb is 500ma then these phones must be fine with variable amps (within its limits) I dont know what the variable numbers are but say its 500ma min, 2A max.. using a 3A charger or a 5A charger shouldnt make a difference in charge speed. It'll only draw 2A. (again hypothetical 2A here, 1.5 may be the max.) That being said... i wouldnt use a 2A as your primary or overnight charger though(unless you only sleep 3 hours ), no need for it..Since these phones dont have a replaceable battery your overnight charger should probably be 1A. Use a 2A during the day if you need a quick boost.
nugzo said:
Yeah it will degrade it quicker, but not significantly. I agree with the previous posts. Its fine to use a charger with higher amps than needed but its not good to use lower amps. (lower than 500ma) Lower amps will kill chargers quick. If usb is 500ma then these phones must be fine with variable amps (within its limits) I dont know what the variable numbers are but say its 500ma min, 2A max.. using a 3A charger or a 5A charger shouldnt make a difference in charge speed. It'll only draw 2A. (again hypothetical 2A here, 1.5 may be the max.) That being said... i wouldnt use a 2A as your primary or overnight charger though(unless you only sleep 3 hours ), no need for it..Since these phones dont have a replaceable battery your overnight charger should probably be 1A. Use a 2A during the day if you need a quick boost.
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I used a Samsung 0.7A OEM charger for a while for my previous phones and always thought that the power is capped by the output of the adapter. If it's rated 0.7A the adapter can output up to what it was rated for; That is wrong on that assumption. Using Current Widget app also appear to support this as well as it was drawing on my S3, 0.999 mA when this adapter as in. I have switched to the 1A adapter because of that; the read outs using the app still shows up as 0.999 mA.
http://forum.xda-developers.com/showthread.php?p=40630411#post40630411
If using a higher one is no good like 2A, I guess we would be able to see what Current Widget saids as well. Supposedly the phone pulls what it needs to my understanding.
the_scotsman said:
Using a higher current charger will degrade the life of the battery faster than normal. It will also be hotter when chraging, thus further degrading the life of the battery.
Bear in mind USB2.0 can only provide 500mA and makes charging slower.
Using a 2A charger ON OCCASION will be fine, but long term use will degrade your battery, it's that simple.
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I'd love to hear where your "simple" comment comes from? Facts, please. I will withhold my view until you can state sources... (Hint: heat will be the only factor in a properly designed system)
banksc said:
I'd love to hear where your "simple" comment comes from? Facts, please. I will withhold my view until you can state sources... (Hint: heat will be the only factor in a properly designed system)
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here's a source. HTC engineers decided to include the charger they did.
bob13bob said:
here's a source. HTC engineers decided to include the charger they did.
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Wow, aren't you a helpful one. There is much more to the H/W selection than what the charging circuit is capable of... Chargers don't "force" a current on the battery. The charging circuit draws what it needs from a charger, assuming it can supply what is drawn. A well designed charging circuit will draw no more than what the battery is capable of without damage. The only factor is heat, which should be accounted for at a nominal level. If heat was't properly accounted for, or they short changed the charging circuit (like the charger) there could be an issue long term.
As an application side note, I had a 2 or 2.1A charger on my Atrix 4G for the 2+ years I owned it and still on the original battery that will last me an 18hr day. You don't do anyone favors talking about stuff you don't know anything about.
banksc said:
Wow, aren't you a helpful one. There is much more to the H/W selection than what the charging circuit is capable of... Chargers don't "force" a current on the battery. The charging circuit draws what it needs from a charger, assuming it can supply what is drawn. A well designed charging circuit will draw no more than what the battery is capable of without damage. The only factor is heat, which should be accounted for at a nominal level. If heat was't properly accounted for, or they short changed the charging circuit (like the charger) there could be an issue long term.
As an application side note, I had a 2 or 2.1A charger on my Atrix 4G for the 2+ years I owned it and still on the original battery that will last me an 18hr day. You don't do anyone favors talking about stuff you don't know anything about.
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It's already documented that other chargers charge the phone faster. HTC included a slow charger for a reason. You don't know more about battery technology then they do. Fast chargers are like $5 for us on amazon. htc can buy them for a $1. There reason is not cost. Why do you think HTC inclduded the charger they did.
There is no perfect battery with unlimited recharge cycles no matter how perfectly designed. Fast charging won't cause you device to explode, but it will accelerate the regular degradation process.
Htc knew people would complain about slow charging, so they allow other chargers to charge the battery faster on case by case, even if it means degradation (slight to moderate) of the battery over time.
You read more about fast charging vs slow charging in the battery geek forums.
banksc said:
I'd love to hear where your "simple" comment comes from? Facts, please. I will withhold my view until you can state sources... (Hint: heat will be the only factor in a properly designed system)
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It comes from my own knowledge and experience. These are facts. If you choose not to believe them that's fine. And yes, I mentioned heat if you look back. And no, these are not properly designed systems.
The HTC One definitely takes a while to charge. What’s interesting however is that the charge curve gets the One to 85–90 percent under the normal 3 or so hours, it’s that last ten percent that takes forever. I also have confirmed that Qualcomm’s Quick Charge is not being used on the HTC One, for whatever reason, possibly to maximize compatibility with the portable USB battery chargers that are now proliferating. The PMIC is there, it just isn’t enabled. My guess would be that HTC wants to prioritize battery longevity and minimize any even potential extra wear since the battery on the One is sealed inside.
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source: http://www.anandtech.com/show/6747/htc-one-review/3
told ya =)
I plan to use this phone for many years, so I'm worried that the fast charging might do damage to the battery in the long term or shorten its lifespan, so I'd rather charge it "slower". Is there a way to turn off the fast charging in the OS? Or is my worry unsubstantiated?
513263337 said:
I plan to use this phone for many years, so I'm worried that the fast charging might do damage to the battery in the long term or shorten its lifespan, so I'd rather charge it "slower". Is there a way to turn off the fast charging in the OS? Or is my worry unsubstantiated?
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You made my night... Slower charger kills battery not fast charging.. fast charge save battery to be honest. And you dont have to be worry since the batteries now are LI-lon . Go get info in google about the batteries . All i can say you got infos wrong.
Sent from my ONEPLUS A3003 using XDA-Developers mobile app
Agree with previous post. But if it makes you feel better, just don't use a dash charger...
Very simple.
lummujaj said:
You made my night... Slower charger kills battery not fast charging.. fast charge save battery to be honest. And you dont have to be worry since the batteries now are LI-lon . Go get info in google about the batteries . All i can say you got infos wrong.
Sent from my ONEPLUS A3003 using XDA-Developers mobile app
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OK. I didn't know.
I was speaking from my past experience with Samsung Galaxy Note 4. I bought couple of original Samsung batteries and rotate them throughout daily usage. I noticed a significant difference in battery life comparing the ones that I used fast charge on vs the ones I didn't. After that I stick to NOT using fast charge.
Of course, that's nothing scientific. And Samsung uses a different fast charge mechanism (higher voltage) than OnePlus (higher current), so there could be difference there too.
Because Dash Charge seems to be re-labeled Vooc charging from OPPO, I can tell you, that the last two years with charging minimum one times every day, there is no bad effect on the battery (still the first one).
Sent from my Find7 using XDA-Developers mobile app
513263337 said:
OK. I didn't know.
I was speaking from my past experience with Samsung Galaxy Note 4. I bought couple of original Samsung batteries and rotate them throughout daily usage. I noticed a significant difference in battery life comparing the ones that I used fast charge on vs the ones I didn't. After that I stick to NOT using fast charge.
Of course, that's nothing scientific. And Samsung uses a different fast charge mechanism (higher voltage) than OnePlus (higher current), so there could be difference there too.
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Samsung devices are notorious for killing batteries and its more likely hardware than it is the battery itself, u will be fine
I have a similar question: does it make any problem if I leave the phone in (dash) charge for the whole night? I mean, if I sleep for 7hrs I'll have 1h of fast charging and 6hrs of nothing-but-charger-heating. Will this habit hurt the phone's battery or the charger itself?
513263337 said:
I plan to use this phone for many years, so I'm worried that the fast charging might do damage to the battery in the long term or shorten its lifespan, so I'd rather charge it "slower". Is there a way to turn off the fast charging in the OS? Or is my worry unsubstantiated?
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I use Samsung 1.5 Amp charger and keep my battery between 40% to 80%
I think these are best for long term usage.
repsol89 said:
I have a similar question: does it make any problem if I leave the phone in (dash) charge for the whole night? I mean, if I sleep for 7hrs I'll have 1h of fast charging and 6hrs of nothing-but-charger-heating. Will this habit hurt the phone's battery or the charger itself?
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I used a samsung S3 before and overnight charging killed my battery! Bless samsung for making battery removable on S3!
If i were you, I wouldn't leave my precious OP3 on an all-night charge.
iam_adarsh said:
I used a samsung S3 before and overnight charging killed my battery! Bless samsung for making battery removable on S3!
If i were you, I wouldn't leave my precious OP3 on an all-night charge.
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Well, it was my first thought, but everyone in this topic is telling me that OP works different than Samsung!
iam_adarsh said:
I used a samsung S3 before and overnight charging killed my battery! Bless samsung for making battery removable on S3!
If i were you, I wouldn't leave my precious OP3 on an all-night charge.
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that's the problem of the charger or the phone itself. thecharger is designed not to charge when the battery is full. What I want to say is you experienced an accident and sorry for you.
The most serious threat to the battery is high temperature. OnePlus 3 reduce the charging heat by its dash charge. The dash charge pushes low voltage directly to the phone, which mitigates the heating problem by pushing high electric current and making the voltage transition process in dash charger. Most of other phones still use high voltage because they fail to create high current. recalling the physics in high school, the power is current multiplied by voltage and energy equals to power multiplied by time. than you would understand the powerful feature of dash charge
dlhxr said:
that's the problem of the charger or the phone itself. thecharger is designed not to charge when the battery is full. What I want to say is you experienced an accident and sorry for you.
The most serious threat to the battery is high temperature. OnePlus 3 reduce the charging heat by its dash charge. The dash charge pushes low voltage directly to the phone, which mitigates the heating problem by pushing high electric current and making the voltage transition process in dash charger. Most of other phones still use high voltage because they fail to create high current. recalling the physics in high school, the power is current multiplied by voltage and energy equals to power multiplied by time. than you would understand the powerful feature of dash charge
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The power is current multiplied by voltage so what's the difference between high current mutiplied by low voltage versus low current multiplied by high voltage ?
2V x A = V x 2A
lapocompris said:
The power is current multiplied by voltage so what's the difference between high current mutiplied by low voltage versus low current multiplied by high voltage ?
2V x A = V x 2A
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qc3.0 uses low current and high voltage. Dash uses high current and low voltage. As a result, they have similar power and both charge quickly. However, the heating problem is more serious for qc 3.0. The difference of the battery voltage and charger voltage is the leading factor that determines the transition efficiency. The bigger the difference is, the more heat charging process generates.
So~ you could look up for qc3.0. for mi 5, it has three adaptive mode: 5V2.5A、9V2A、12V1.5A. for dash, we have 5V4A
repsol89 said:
I have a similar question: does it make any problem if I leave the phone in (dash) charge for the whole night? I mean, if I sleep for 7hrs I'll have 1h of fast charging and 6hrs of nothing-but-charger-heating. Will this habit hurt the phone's battery or the charger itself?
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There is no problem with leaving your phone on the charger. I do this with every phone since years.
If people experience something bad with it, their phone or battery are broken. The current tech just keeps the battery at full capacity once it's full. Never had any problem.
So many "opinions" but mostly incorrect. The answer to the OPs question is that you don't have to worry about quick charge destroying your battery. It will not have significant impact on your battery capacity. I would have been more worried about breaking the usb type-c port(see point 2 below). All things considered, after 2-3 years you will probably buy a new phone anyway and also you can always buy a replacement battery cheap. But you can simply use a normal charger which delivers <3A with 5V so you don't have to worry about anything.
1- Slow charge does not damage lithium-ion chemistry batteries. You can read about lithium-ion charging here. But neither fast charge will damage lithium-ion as long as the battery temperature is not extremely high. Also temperature at different charge stages effect the capacity decrease (source) But you will be fine as long as the battery temperature is less than 45C. The charging IC should stop the charging process if it exceeds it anyway.
2- Qualcomm's quick charge is much better than voop/dash charge from an engineering standpoint. This is why also USB organization's power delivery (PD) standard uses similar scheme. The problem is the cable and the connector. The maximum allowed current at 5V is 3A with usb type-c connector (source). If you provide more current, you need to use a thicker cable(dash/vooc cables). But you can't change the connector, and it may damage your connector in the long run to use 3+A currents to charge. Because there is a contact resistance (R) and the power lost in the connector is square of current (I) times R. Meaning R*I^2, it will wear off the connector faster. This is why some companies with some engineering skills opt in to use higher voltages instead of higher currents.
3- You can't push more current to lithium-ion battery than it accepts. The maximum current is voltage delta (between charging voltage and battery voltage) divided by internal resistance. This is why you can charge empty battery much faster. If you use an app like Ampere from play store, you can see the voltage of your battery before and after you plug in your charger. If you plug in a normal charger, you will see that it goes up a little bit. If you plug a quick charger it goes up to ~4.35V
4- Yes, there is conversion inefficiencies for quick charge inside the phone, and it will warm up the "phone" and battery only indirectly. The conversion IC are normally >90% efficient (source). This does not mean that your battery will be destroyed. It is perfectly fine to charge lithium-batteries with up to 45C temperatures (source).
4- If overnight charging killed your battery, your battery was faulty (or you had 3rd party battery?). The battery should be capable of holding 4.35v charge. You would need to store battery at 4.35V full charge for over 3 months to loose 20% capacity (http://batteryuniversity.com/learn/article/how_to_store_batteries). Having full charge few hours overnight won't destroy it unless your battery or device is faulty.
With all this information, I would rather opt in for USB-PD/Qualcomm Quick Charge solutions than VOOC/DASH solutions. I think eventually only USB-PD will remain and everybody will use it as a standard only.
Does fast charging as opposed to normal charging (FC turned off in device care) as our standard means of charging our devices affect battery lifespan in the long run?
All things being equal, I don't think that it does
raul6 said:
All things being equal, I don't think that it does
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Well, thanks. But it's the noticeable heat generated from fast charging that gives me some concerns whereas in normal charging, the heat isn't that much.
Well, no such differences with chargers I use but if there was I would be probably use normal charging
No. Charging doesn't harm your phone
Sent from my SM-N975F using Tapatalk
Its a known fact that high temperatures are bad for lithium ion batteries, fast charging generates more heat than std charging, if there are no adverse effects by fast charging, then it would not be an option, it would be the standard
winol said:
Its a known fact that high temperatures are bad for lithium ion batteries, fast charging generates more heat than std charging, if there are no adverse effects by fast charging, then it would not be an option, it would be the standard
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Fast charging is fine as long as you control the heat; brief 10-30% partial charges generate a modest temp increase. LIs are designed for fast charging.
If your ambient room temp is high simply wrap a damp rag around the phone while charging to cool it.
Monitor bat temp and keep it belong 95 F.
-Avoid full or near full charging-
60-70% is a good range; > 62% is ideal for longevity.
Avoid discharging below about 20%; low voltage isn't as efficiently converted and there's a knee in LI's power curve near that mark; battery % drops more rapidly from 20-6%.
Deep cycle recharges stress the LI much more than short 10 or 20% bursts.
LI's love frequent, short charge cycles in the 40-60% range.
Keep battery >100 F when using, charging or storing!
Avoid using the phone whilst charging; it screws up the charge cycle curve and greatly slows charging!
Same-same if battery temp exceeds 100 F!
25 w brick yields about 2%@ minute charge.
Hi. I have the Indian version of the device, which is Mi 11x 6|128GB variant. I noticed while charging, Accubattery shows battery temps of 45 46 degrees Celsius (113 Fahrenheit). I find that not normal for a new phone. I'm coming from a Poco F1 which had a SD845, so here are my doubts:
1. Does all flagship class SoCs heat up that much during charging? But my Poco F1 didn't.
2. Is there something wrong in my unit or is it faulty cooling implementation on the entire Redmi K40 lineup?
3. Can I expect this issue to become a little less in the future after some updates to alter SoC clock speed or something?
Thanks for reading.
Thats normal if you use the included 33W charger, the battery naturally heats up while charging, the fatest you charge the battery the more heat it produces. is always recommended to not heavily use the phone while in charge. just for the sake of doubt you can try use a 5W charger and see if it heats up while charging slowly, (it should be hot just a little).
What's the ambient temperature?
Is it fast charging? Which typically produces a,fair amount of waste heat.
If it's start temperature is 99F it will climb into the triple digits.
You want the battery to be above at least 72°F at charge start to prevent the possibility of Li plating.
While it may be normal for this phone, you are beating the battery. It's been reported that high temperatures during fast charging can promote Li plating.
Cool it once it reaches 99F, with a fan and/or a damp microfiber cloth.
On my Samsung it will stop charging if it goes above about 102F. Samsung tends to be conservative with their charging parameters.
Not a bad thing as it lengthens battery lifespan and reduces the chances of a thermal runaway event.
GranoTurc00 said:
Thats normal if you use the included 33W charger, the battery naturally heats up while charging, the fatest you charge the battery the more heat it produces. is always recommended to not heavily use the phone while in charge. just for the sake of doubt you can try use a 5W charger and see if it heats up while charging slowly, (it should be hot just a little).
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I'll try this with my Poco F1 charger and let you know what I find
Ambient here is
blackhawk said:
What's the ambient temperature?
Is it fast charging? Which typically produces a,fair amount of waste heat.
If it's start temperature is 99F it will climb into the triple digits.
You want the battery to be above at least 72°F at charge start to prevent the possibility of Li plating.
While it may be normal for this phone, you are beating the battery. It's been reported that high temperatures during fast charging can promote Li plating.
Cool it once it reaches 99F, with a fan and/or a damp microfiber cloth.
On my Samsung it will stop charging if it goes above about 102F. Samsung tends to be conservative with their charging parameters.
Not a bad thing as it lengthens battery lifespan and reduces the chances of a thermal runaway event.
Click to expand...
Click to collapse
Ambient here is 86 Fahrenheit and above. While charging the phone, I don't even use it. I just put it face down on the screen so that the heat dissipation is faster from the back surface. But still it reaches those temperatures and is making me doubt the QC process of Xiaomi in this case.
TweaknFreak said:
Ambient here is
Ambient here is 86 Fahrenheit and above. While charging the phone, I don't even use it. I just put it face down on the screen so that the heat dissipation is faster from the back surface. But still it reaches those temperatures and is making me doubt the QC process of Xiaomi in this case.
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Click to collapse
It may dissipates more heat through the display.
Never use a phone while charging as it skews the charge cycle parameters.
Simply cool as I described or don't use fast charging.
You can also use partial charge cycles like 40-60%. That's also part of the range the battery pulls high current and heats up.
If I see my battery temp climb above 100F I will stop the charge and hit it up a little latter.
For my Samsung the optimum battery temp range for fast charging is 85-100F. Outside of that range fast charging may not always engage or stay engaged. However in that ambient temperature range I need to some form of cooling when fast charging if I want to maintain a temperature under 100F.
Always keep an eye open for case swelling which indicates a battery failure. Replace it immediately if that happens.
It becomes more likely as the battery ages or if exposed to temperature/current extremes. I just replaced a failed battery at the 1.5 year mark on my Note 10+.
Fun, isn't it
I just checked the charging with my Poco F1 charger which is 18W. The portion just below the camera module heats up the most. And the temperature between charging with the 33W charger and 18W poco charger are same. At least that's what Accubattery says. I'm replacing this device for sure, let's see how the replacement device works out.
TweaknFreak said:
I just checked the charging with my Poco F1 charger which is 18W. The portion just below the camera module heats up the most. And the temperature between charging with the 33W charger and 18W poco charger are same. At least that's what Accubattery says. I'm replacing this device for sure, let's see how the replacement device works out.
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If the temperature is the same than it's not fast charging. Fast charging generates much more heat however even while it's enable the charge rates vary due to temperature, charge state and battery condition.
For instance between 80-100% the charge rates will be about the same. This may start as low as at 70% or even lower if the charging parameters aren't optimum.
The easiest way to tell is with an app like Accubattery. Put it on the charge page then use the power button to turn off the screen. Start charging. You have about a second if you turn the screen on to see the screen off charging milliamp figure. The charging log also tells what was happening but not when it happened in the charging cycle.
At maximum rate mine tops out at around 5200 ma using a 25 w brick. It varies between 1700- 5200 until it starts ramping down as the cell nears a full charge.
Nearing 90-100% it may be 800 ma or lower.
blackhawk said:
If the temperature is the same than it's not fast charging. Fast charging generates much more heat however even while it's enable the charge rates vary due to temperature, charge state and battery condition.
For instance between 80-100% the charge rates will be about the same. This may start as low as at 70% or even lower if the charging parameters aren't optimum.
The easiest way to tell is with an app like Accubattery. Put it on the charge page then use the power button to turn off the screen. Start charging. You have about a second if you turn the screen on to see the screen off charging milliamp figure. The charging log also tells what was happening but not when it happened in the charging cycle.
At maximum rate mine tops out at around 5200 ma using a 25 w brick. It varies between 1700- 5200 until it starts ramping down as the cell nears a full charge.
Nearing 90-100% it may be 800 ma or lower.
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But 45 degrees Celsius is not normal for a new device dont you think? I mean if it was 65W charging I'd say maybe it can get a little toasty but for 33W I'm sceptical.
TweaknFreak said:
But 45 degrees Celsius is not normal for a new device dont you think? I mean if it was 65W charging I'd say maybe it can get a little toasty but for 33W I'm sceptical.
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If that's the battery temp, it's high. The CPU can easily run beyond that though.
If the whole phone feels hot you got issues.
blackhawk said:
If that's the battery temp, it's high. The CPU can easily run beyond that though.
If the whole phone feels hot you got issues.
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It's generally the back portion of the phone specially the part below the camera module. I'm getting the device replaced tomorrow. Let's see what happens