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As we all know, the charger xiaomi provided in the box does not support fast charging, although it is quite good. For fast charging we have to use different adapters or powerbanks that support it.
Yesterday when I was using my normal charger, it suddenly showed quick charge and two lightning symbols in the top right corner, which indicates fast charging, that I usually get when using my mi powerbank.
First I thought it was a software flaw but sure enough, my phone was charging at a much faster rate and was heating up similar to when I charge using powerbank.
Unfortunately when I removed the charger and reinserted it, the phone charges at it's normal rate, and I've been unsuccessfully trying to repeat it but it's not happening.
My device is completely unmodified, stock unrooted rom and bootloader locked.
I think this means that the normal adapter might be capable of fast charging but xiaomi has disabled it, something worth looking into.
Also I know the phone charges quite fast below 50%, I saw this effect while phone was at 69% and reached 72% in barely 3 minutes or something.
Unfortunately I did not have the presence of mind to take photos as proof.
first of all if you are using charger which comes in box with the phone, its not a fast charger its only 5V2A.
2nd it can't charge at pace compared to fast chargers as it can only provide 2A at max or it may be faulty
3rd it may be software bug just showing quick charge
and in the end you said it charged from 69 to 72 in 3 min. i can say its not fast charging because my charger 5V2A which came in box also charges at same speed you are saying. it normally takes around 1 min for 1% increase but depends on various factors like load being used currently by the phone.
sometimes when data is off or battery saver os on it charges more quickly as consumption is also less so it charges fast.
gursewak.10 said:
first of all if you are using charger which comes in box with the phone, its not a fast charger its only 5V2A.
2nd it can't charge at pace compared to fast chargers as it can only provide 2A at max or it may be faulty
3rd it may be software bug just showing quick charge
and in the end you said it charged from 69 to 72 in 3 min. i can say its not fast charging because my charger 5V2A which came in box also charges at same speed you are saying. it normally takes around 1 min for 1% increase but depends on various factors like load being used currently by the phone.
sometimes when data is off or battery saver os on it charges more quickly as consumption is also less so it charges fast.
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It was 2% in one minute, I've attached a ss from telegram group of violet where I reported this for proof. My data and wifi were on, and I've enabled always switch on data for faster switching in developer settings.
Even now it's currently happening, but the rate is very slow, I think it's probably a software bug like you say, any idea why this is happening?
Edit 1: That Telegram ss is from the day where I first created this thread, not today.
Shivangchopra22 said:
It was 2% in one minute, I've attached a ss from telegram group of violet where I reported this for proof. My data and wifi were on, and I've enabled always switch on data for faster switching in developer settings.
Even now it's currently happening, but the rate is very slow, I think it's probably a software bug like you say, any idea why this is happening?
Edit 1: That Telegram ss is from the day where I first created this thread, not today.
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i know the time is different but why didn't it increased in screenshots you uploaded the time already changed in both of them but battery remains same 69%. its showing fast charging but its not working I guess
plus maybe your battery health is not good.
I use USB tethering every single day, and to get the maximum speed, I have my P40 Pro connected to the USB-C plug on my PC. However, this makes the P40 Pro FAST CHARGE as if its life depends on it.
This is horrible for the battery life, is there any way to disable fast charging?
Use a cable wich doesn't suport fast charging.
Shymmy said:
Use a cable wich doesn't suport fast charging.
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won't that also lower the data speed?
lolan11628 said:
won't that also lower the data speed?
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It shouldn't. Test it.
If you don't take the battery below 40% or above 80% when charging, fast charging should not impact battery longevity much.
The former stresses the battery a lot.
Li's love frequent midrange charging... it can extent battery life by hundreds even thousands of charge cycles.
High cell voltage and excessive temperature are Li's biggest enemies.
Try to avoid cold charging >82°F start temperature, avoid charging an Li below 72F and never charge one that's near or below freezing temperatures! Li plating can occur when charging at low temperatures, it will permanently degrade the battery if it occurs.
Charging is a electrochemical reaction that requires heat to function properly.
Never charge if above 100F though as this is near the top end cutoff for charging. Cool the phone with air and/or a damp microfiber cloth in hot ambient temperatures (>95F) when charging or using.
blackhawk said:
It shouldn't. Test it.
If you don't take the battery below 40% or above 80% when charging, fast charging should not impact battery longevity much.
The former stresses the battery a lot.
Li's love frequent midrange charging... it can extent battery life by hundreds even thousands of charge cycles.
High cell voltage and excessive temperature are Li's biggest enemies.
Try to avoid cold charging >82°F start temperature, avoid charging an Li below 72F and never charge one that's near or below freezing temperatures! Li plating can occur when charging at low temperatures, it will permanently degrade the battery if it occurs.
Charging is a electrochemical reaction that requires heat to function properly.
Never charge if above 100F though as this is near the top end cutoff for charging. Cool the phone with air and/or a damp microfiber cloth in hot ambient temperatures (>95F) when charging or using.
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Well, the issue is that I use my phone for USB tethering every single day, and Huawei doesn't include any setting to limit the capacity to stop charging at for example 80%
My Samsung tablet for example has this setting natively.... Huawei for some reason refuses to add this.
lolan11628 said:
Well, the issue is that I use my phone for USB tethering every single day, and Huawei doesn't include any setting to limit the capacity to stop charging at for example 80%
My Samsung tablet for example has this setting natively.... Huawei for some reason refuses to add this.
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My Note 10+ doesn't either
Always doing it the hard way like a bad gf
That's one way to boost OEM battery sales...
Hey, but P40 pro has the smart charging mode ... don't you have it activated ??
Shymmy said:
Hey, but P40 pro has the smart charging mode ... don't you have it activated ??
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I have, but that doesn't actually disable fast charging, nor does it actually stop charging before the battery is completely full. It only in theory does some things when 'it' guesses is appropriate, so it's useless. I haven't really noticed anything.
I looked at the phone exactly when it displayed the message that the phone stopped charging at 80% and that it will be resumed at a certain time (I don't know exactly, about 3 hours).
Since you already know that Pixel 4a supports 18W charging through USB C-C using USB-PD. Is it possible to charge the device a bit more slowly to keep the battery cool and possibly increase its life span?
A simple Google search showed that by using USB A-C cable, it won't be doing USB-PD quick charging instead it will charge using USB-BC (Battery Charging, a legacy standard) which will limit the power at around 7W.
By attaching USB-C end of the quick switch adapter(OTG) that came with the device to power adapter and connecting its other end (USB-A) to the device itself by running a USB A-C cable in between. Will this make the device charge slowly? Can anyone test this?
To find out for sure how much current is being used to charge your phone, you should install an app like this:
Ampere - Apps on Google Play
Measure the charging and discharging current of your battery.
play.google.com
JohnC said:
To find out for sure how much current is being used to charge your phone, you should install an app like this:
Ampere - Apps on Google Play
Measure the charging and discharging current of your battery.
play.google.com
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question is on how to slow charge the device
Well, just get a 1amp charger or use a non-quick charge cable.
The problem is that you won't know if an amazon description for a cable is accurate or not.
So, the way to make sure it is charging slow, is to use the app I mentioned.
I charge my pixel 4a with a 350 mah charger (it is an old Motorola charger in micro usb, i just put à micro usb to usb c little gizmo).
It is around 1,5 w and charge my pixel 4a in around 10 hours , if the pixel is completly empty. You can also use a 5w charger with a usb a usb c câble, it will be faster but warmer
Any brick or cable that doesn't support that protocol or can't supply enough amps will cause the power controller to default to slow charging.
Most fast charging capable phones also have a software option to disable fast charging regardless of the brick/cable's rating.
The real trick is getting it to fast charge when you want it to
My goal was to charge my pixel 4a during the night with the slowest method to keep my battery as Healthy as possible. The 350mah just give me that. ( i keep my phone four to five years so i Try to take care of my battery)
lop1 said:
My goal was to charge my pixel 4a during the night with the slowest method to keep my battery as Healthy as possible. The 350mah just give me that. ( i keep my phone four to five years so i Try to take care of my battery)
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Don't let it drop below 40% or charge beyond 72% in that case.
At some point it's just easier to replace the battery though
blackhawk said:
Don't let it drop below 40% or charge beyond 72% in that case.
At some point it's just easier to replace the battery though
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This seems more an urban legend this 40 72%, the charging processor take care of that For you.
lop1 said:
This seems more an urban legend this 40 72%, the charging processor take care of that For you.
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Click to collapse
Li's prefer midrange usage with frequent partial charges. Cuts down the heat and the high cell voltage that degrades them faster. Degrades them only a fraction of a full charge cycle. Longer lifespan and less time charging for the same amount of mAh. Win-win.
Even today many confuse their requirements with NiCads Thinking they should fully charge/discharge them. Trying to convince some them otherwise is like talking an alcoholic out of drinking booze. "I've always done it that way..."
@blackhawk
but if someone who follows this 40-80 rule, how to reset battery stats?
Can it be done using ADB command?
ashutoshmn said:
@blackhawk
but if someone who follows this 40-80 rule, how to reset battery stats?
Can it be done using ADB command?
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I really don't use those stats at all. More Google hype that never proved all that useful for me.
I use Galaxy Labs Battery Tracker, the history log* of Accubattery as well as karma Firewall logs to track usage.
Occasionally you may want to do a calibration too as the % accuracy will drift over time.
*as long as my usage stays at >10%@ hour SOT, I'm not very concerned
blackhawk said:
I really don't use those stats at all. More Google hype that never proved all that useful for me.
I use Galaxy Labs Battery Tracker, the history log* of Accubattery as well as karma Firewall logs to track usage.
Occasionally you may want to do a calibration too as the % accuracy will drift over time.
*as long as my usage stays at >10%@ hour SOT, I'm not very concerned
Click to expand...
Click to collapse
and by calibration, do you mean drain to 0 and charge to 100 every once in a while?
ashutoshmn said:
and by calibration, do you mean drain to 0 and charge to 100 every once in a while?
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Yeah, which I don't like doing. If falls way out of calibration you'll think you're at 20% when in fact you're at 7% for example.
Many say to repeat the calibration cycle 2 or 3 times for it to take.
If the battery has failed this can be a dangerous procedure. How do I know? Just had a battery failure but because of the case didn't see the back cover bulging. All the while I was happily torturing the bad cell for over a month begging it to do its worse
I was fortunate it didn't damage the display of my Note 10+ or worse.
If you encounter erratic fast charging, reduced battery capacity always suspect a battery failure and look for the telltale back cover bulge. These bag Li's can fail at any time especially as they get older.
BTW, people who are reading this, you can charge your 4a at 7.5W (5V*1.5A) using OTG adapter plugged into the charger and a USB A-C cable. The temp. increase of battery is way less than full fast charge of 18W.
ashutoshmn said:
BTW, people who are reading this, you can charge your 4a at 7.5W (5V*1.5A) using OTG adapter plugged into the charger and a USB A-C cable. The temp. increase of battery is way less than full fast charge of 18W.
Click to expand...
Click to collapse
Also bare in mind that even when slow charging you never want the Li cell temp below 72°F, but 82F is a better bottom threshold temperature.
Li plating* can result from cold or hot (>100F) charging regardless of charging rate.
NEVER EVER attempt to charge an Li in near freezing temperatures*
*this can lead to a thermal runaway event
blackhawk said:
Also bare in mind that even when slow charging you never want the Li cell temp below 72°F, but 82F is a better bottom threshold temperature.
Li plating* can result from cold or hot (>100F) charging regardless of charging rate.
NEVER EVER attempt to charge an Li in near freezing temperatures*
*this can lead to a thermal runaway event
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Click to collapse
Billions of Li devices in service around the globe. If this was a 'thing' manufactures would prevent charging at low temps. Not debating the wisdom or detremental effects on longevity of charging at low/high temps. No need to season the spew with faux drama.
DB126 said:
Billions of Li devices in service around the globe. If this was a 'thing' manufactures would prevent charging at low temps. Not debating the wisdom or detremental effects on longevity of charging at low/high temps. No need to season the spew with faux drama.
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Do what you want... and you're own research*.
You offer zero good advice and a half mass flame attempt.
Lead me, follow me or get the hell out of my way.
*https://www.sciencedirect.com/scien...of the internal,also affect the battery power.
Temperatures I suggested are for optimum performance/longevity with minimum chance of Li plating from multiple sources. They are very conservative.
I just had a battery failure on my Note 10+ that started by slow charging it to 100% at about 45-50°F. Boom, just like that. Took over a month to realize what had happened but that's what started the whole mess. I was fortunate the swollen battery didn't damage my display.
Oy vey - self-designated expert in a box with a short fuse. Happy Mother's day, champ.
DB126 said:
Oy vey - self-designated expert in a box with a short fuse. Happy Mother's day, champ.
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WYSIWYU... call it like I see it.
Mum's been dead for decades.
Hope your's is not... spend some time with her.
You only get one.
Hi,
Had anyone noticed that A22 5G (EU version) fast charging works only (i.e. >2000mAh) when the screen is off?
I'm using AccuBattery to check charging current, time, etc. and surprisingly it shows that the charging current falls back to max. 800mAh when the screen is turned on! Never seen such phenomena on any previous Samsung phone - had Note 10 light, A51, S8 previously...
This happens with its original, factory provided charger as well as other Samsung (or even other, quality) chargers, too...
Normal. The display must be off for fast charging to engage.
It's to protect the battery.
Thanks for the very quick reply. Still, it's strange for me - as I wrote, neither the very old S8 not the newer A51 didn't limit the current while the screen was on...
brobi69 said:
Thanks for the very quick reply. Still, it's strange for me - as I wrote, neither the very old S8 not the newer A51 didn't limit the current while the screen was on...
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Click to collapse
It's typical behavior on my Note 10+'s.
You can listen to Poweramp with bluetooth while fast charging but if the display comes on it will charge very slowly.
Only takes 10 or 15 minutes to get a partial 20-30% midrange charge, so do it when you take a break. Li's love frequent midrange power cycling in the 40-70% range, it extends their lifespan significantly.
So out of nowhere my phone has stopped fast charging both wired and wirelessly. I'm using the same wall charger and cable and even my car had a fast charging adapter and also does not work anymore. I tried my old LG phone and it still fast charges using the same chargers/cables that used to work with my pixel 7 pro.
What could be wrong?
Try toggling the fast charge setting on/off 3 times. Try a hard reboot.
If intial battery temperature is too low or high at start of charge fast charging will not engage. Best start temperature is 82F.
A battery failure will skew fast charging.
Any recent upgrades or updates?
Possible firmware corruption or a hardware failure. Use DeviceChek to view the temperature sensors to see if their readings are nominal. A false low or high can disable fast charging.
littleape said:
So out of nowhere my phone has stopped fast charging both wired and wirelessly. I'm using the same wall charger and cable and even my car had a fast charging adapter and also does not work anymore. I tried my old LG phone and it still fast charges using the same chargers/cables that used to work with my pixel 7 pro.
What could be wrong?
Click to expand...
Click to collapse
Try cleaning out your charging port. You may have debris in it. It's surprising how much lint and dust gets into the charging port.
xunholyx said:
Try cleaning out your charging port. You may have debris in it. It's surprising how much lint and dust gets into the charging port.
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Except wireless fast charging isn't working as well.
A port pcb failures is possible as they interact with the charging and other systems.
blackhawk said:
Except wireless fast charging isn't working as well.
A port pcb failures is possible as they interact with the charging and other systems.
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I never even knew that fast charging worked with wireless since I've never used it. I've always assumed that it wouldn't
blackhawk said:
Try toggling the fast charge setting on/off 3 times.
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Click to collapse
Where is this setting? I had a quick look through dev options but didn't see it, maybe I missed it.
There was a recent google update that maybe caused it. I wasn't really paying attention but this issue has started very recently.
littleape said:
Where is this setting? I had a quick look through dev options but didn't see it, maybe I missed it.
There was a recent google update that maybe caused it. I wasn't really paying attention but this issue has started very recently.
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Click to collapse
Power settings probably. That's a trick used for Samsung's. After updates double check settings.
Personally I never upgrade or update firmware if it's fulfilling its mission... you're starting to see why
xunholyx said:
I never even knew that fast charging worked with wireless since I've never used it. I've always assumed that it wouldn't
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It does but the fast charging speed increase is more modest than with cable charging.
Personally I never use this because it's inefficient and generates more heat. The C port can withstand (or should) many thousands of use cycles. They are fairly robust compared to the old micro ports, they seldom fail.
blackhawk said:
Power settings probably. That's a trick used for Samsung's. After updates double check settings.
Personally I never upgrade or update firmware if it's fulfilling its mission... you're starting to see why
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Battery settings was the first spot I checked before but there's nothing there for fast charging. I have not seen fast charging mentioned under any settings on this phone.
littleape said:
Battery settings was the first spot I checked before but there's nothing there for fast charging. I have not seen fast charging mentioned under any settings on this phone.
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Click to collapse
I don't think there is a setting for it. I searched on my phone as well.
xunholyx said:
I don't think there is a setting for it. I searched on my phone as well.
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Click to collapse
Try toggling adaptive charging. Pixels power settings differ from Samsung's it seems. Fast charging originates from Google Android... different flavors.
Try a different outlet on another electrical circuit. There may be a wiring fault.
Try replacing the Google brick and cable with a new pair. Always good to have a backup. It may seem like overkill but it's also the easiest and most obvious solution.
Shoot no luck. Turned off adaptive battery stuff, shut the phone off, booted it back up, switched adaptive stuff on ...still no fast charging.
Major bummer
May have to speak to Google about a repair
littleape said:
Shoot no luck. Turned off adaptive battery stuff, shut the phone off, booted it back up, switched adaptive stuff on ...still no fast charging.
Major bummer
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Click to collapse
Try a new charger/cable and different AC circuit.
If that fails, send in for repair. Not having fast charging is a big inconvenience...
blackhawk said:
Try a new charger/cable and different AC circuit.
If that fails, send in for repair. Not having fast charging is a big inconvenience...
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Click to collapse
"and even my car had a fast charging adapter and also does not work anymore. I tried my old LG phone and it still fast charges using the same chargers/cables that used to work with my pixel 7 pro."
I have the same issue. Its temperature related, but in summer days, its actually charging crazily slow. Horrible phone.
matrixhaj said:
I have the same issue. Its temperature related, but in summer days, its actually charging crazily slow. Horrible phone.
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Click to collapse
I don't think that's the issue in my case. I never had any issues with charging or battery. My phone stays cool to the touch and I don't do anything on it basically, just sits idle.
matrixhaj said:
I have the same issue. Its temperature related, but in summer days, its actually charging crazily slow. Horrible phone.
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Click to collapse
It's not the phone, it's physics. Fast charging generates a fair amount of heat.
In ambient temperatures of 90-95+°F cooling is needed for fast charging; a fan and/or a damp microfiber cloth. Fast charging will disengage if the battery temperature reaches approximately 102F. Charging will disengage completely at about 106F to avoid damaging the phone.
Charging beyond 82% in high ambient temperatures isn't a good plan for battery longevity...
I just checked my battery temp and it's just above room temperature at 23C (73F)
blackhawk said:
It's not the phone, it's physics. Fast charging generates a fair amount of heat.
In ambient temperatures of 90-95+°F cooling is needed for fast charging; a fan and/or a damp microfiber cloth. Fast charging will disengage if the battery temperature reaches approximately 102F. Charging will disengage completely at about 106F to avoid damaging the phone.
Charging beyond 82% in high ambient temperatures isn't a good plan for battery longevity...
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Click to collapse
Thanks for lecture from physics. No, its phone.
I am not talking about issue, that it wont fast charge for very long.
Iam talking about how fast charge never even engage, even when phone is low on battery.
And I never keep my phone on sunlight, also never game on my phone. Thermal management on pixel is just crap.