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charging - amperage/current quickly drops to ~440mA regardless of battery %

in the last week my battery no longer "quick charges". i have 'Ampere' installed so i'm used too seeing it charge at around 2800mA. i vaguely understand that phones charge quicker up to around 80% and then at a slower rate for the remaining - it's not this.
when I plug in the, current starts at ~1300mA and climbs to just under 3000mA... and drops to ~440mA in a minute or so.
it doesn't appear to be the cable and/or charging block that came with the phone - using a 1A charger from my last phone gets similar results and i purchased a new cable that's compatible with high speed charging.
i really wanted to love this phone.

I have a Samsung quick Charger from a Note5, and it has never quick charged my PureXL (actually super slow charges it,) but after the last update, I noticed I got an overvoltage error using it....

The reason is that this phone is not quick charge enabled. That's actually something that needs to be built into the SoC + Kernel support. You have a solid 2A charger, it'll go fast, but it can't rapid draw like say, the premium motos or a OnePlus.

TheLastCanadian said:
The reason is that this phone is not quick charge enabled. That's actually something that needs to be built into the SoC + Kernel support. You have a solid 2A charger, it'll go fast, but it can't rapid draw like say, the premium motos or a OnePlus.
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sorry, i don't think i explained myself that well. i'm pretty sure that i've noticed a change in performance. when the phone was new i remember the current being high when battery % was lower, and then decreasing as it charged.
in the last week or so it seems to be charging at a slower rate and with the original 2A charger and cable. if the battery is at 20% the current will increase quickly to something above 2800mA and then immediately decrease so that by the time it's at say 22% charged the current is at a steady 440mA.
oh! ****. i didn't realize that 'quick charge' was actually 'Quick Charge™ by Qualcomm®'.. nice and generic sounding.

my pure xl was doing a full charge in less than 3 hours. as of last week all of a sudden it takes 10 hours to fully charge. using original charger and cable. can anyone shed a light on fixing this problem?

thvpk said:
my pure xl was doing a full charge in less than 3 hours. as of last week all of a sudden it takes 10 hours to fully charge. using original charger and cable. can anyone shed a light on fixing this problem?
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My Nexus 6p is now facing the same problem as yours. It charges less than 3 hours before and all of a sudden two days ago, it has taken 10 hours to fully charge. With all cables and charges faults ruled out, my only guess is the fault lies in the phone. I don't think it is the USB port either. I believe it may be something to do with the software I cannot comprehend. But I currently don't have the time to reflash my ROM. This Resurrection remix ROM served well for the past year.
Currently, my amperage averages out to 350 mA. Sad. I wish someone with knowledge about this can reply to this thread. It seems this question has been lingering here for more than two years already. Are we the only ones who face this problem?

Best battery life tip: don't use the turbo charger!

So, I own this phone for a few weeks now and I got pretty frustrated about the battery life on this phone as I was getting 3 hrs of SOT a best.
Then I decided not to stress the battery so much by charging it with the included turbopower 25 charger all the time, and use my old (5V 2.1A) charger overnight instead. Then I was surprised to see my SOT going up to about 4.5-5hrs.
I did some research about fast charging techonlogy and found out that when you fast charge you typically don't get as much charge into a battery as with a slow charge.
I still use the turbo charger when I am short on time, but using my regular one definetely does add more juice to the battery, thus, helping it last throughout the day.

sleepdownloader said:
So, I own this phone for a few weeks now and I got pretty frustrated about the battery life on this phone as I was getting 3 hrs of SOT a best.
Then I decided not to stress the battery so much by charging it with the included turbopower 25 charger all the time, and use my old (5V 2.1A) charger overnight instead. Then I was surprised to see my SOT going up to about 4.5-5hrs.
I did some research about fast charging techonlogy and found out that when you fast charge you typically don't get as much charge into a battery as with a slow charge.
I still use the turbo charger when I am short on time, but using my regular one definetely does add more juice to the battery, thus, helping it last throughout the day.
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Will definitely try that out. Cuz my usage gets me around 4 -4.5 or even 6 if I read a little. So if this happens for me too I'm gonna get some nice battery life.

Curlyfry2121 said:
Will definitely try that out. Cuz my usage gets me around 4 -4.5 or even 6 if I read a little. So if this happens for me too I'm gonna get some nice battery life.
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Please do report

It doesn't really matter, at least not that significantly... something else is the cause.
Using a turbo charger could change the longevity of the battery, over time, due to heat buildup and breakdown of the internal components due to more stress, but it wouldn't just "get better" switching to standard charger... I charge my phone half the week on a standard charger when at home, and when traveling I use a quick charger. If I am on either at home or on the road for a few weeks at a time and my battery life doesn't change. Well, not because of the charger, but at home I am within 30' of a very high quality WiFi router all the time and essentially never on mobile data, on the road it's the complete opposite.
If you did your researching into Qualcomm's Quick Charge 2.0 (and higher) standards you would see that the issue of batteries not getting a full charge from the original QuickCharge/Fast Charge standard has been remedied with high voltage charging automatically downgraded to "standard" voltage charging during about the last 10% of the charge cycle to allow the battery to cool and take a full charge.
Not doubting your getting better SOT, just your analysis of the reason why are...

acejavelin said:
It doesn't really matter, at least not that significantly... something else is the cause.
Using a turbo charger could change the longevity of the battery, over time, due to heat buildup and breakdown of the internal components due to more stress, but it wouldn't just "get better" switching to standard charger... I charge my phone half the week on a standard charger when at home, and when traveling I use a quick charger. If I am on either at home or on the road for a few weeks at a time and my battery life doesn't change. Well, not because of the charger, but at home I am within 30' of a very high quality WiFi router all the time and essentially never on mobile data, on the road it's the complete opposite.
If you did your researching into Qualcomm's Quick Charge 2.0 (and higher) standards you would see that the issue of batteries not getting a full charge from the original QuickCharge/Fast Charge standard has been remedied with high voltage charging automatically downgraded to "standard" voltage charging during about the last 10% of the charge cycle to allow the battery to cool and take a full charge.
Not doubting your getting better SOT, just your analysis of the reason why are...
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Maybe you're right, I'm still monitoring my battery life on both chargers, and with the same usage, my battery does last longer when charging with the regular 5V one. I'm mostly on 3G network data and rarely use wifi, as I'm mostly only sleeping or eating at home. Maybe there are other factors making this difference, though i'm pretty sure the charger is the only difference for me. Will report if I notice anything else.

I don't see any big difference, I'm also using standard charger over night and quick when I'm in the hurry. Despite charging methods my sot time is very inconsistant from 2,5h to 4h at best.

Charging speed

To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the OnePlus 6T can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

dash charge (now called fast charge) is crazy fast!!

Still, I would only recommend using that feature if there is a real benefit - i.e. time is of the essence. The battery will age quicker being dash charged all the time.

saw 60 percent at 35 minutes and 38 seconds, which is more or less in line with what OnePlus claims

Incredibly fast compared to my old Honor 8. One example I have is the first charge I did 5 days ago when I had bought it at a pop-up event here in Sweden. I had used it for about 1-2 hours with the screen on when I was setting it up and trying out the phone. Then when I plugged it in, it went from 36% to 75% in just 24 minutes. That's insanely fast
I've also noticed that just like OnePlus claims, the phone basically charges at the same speed with the screen on as if I would have had the screen off.

Bäcker said:
Still, I would only recommend using that feature if there is a real benefit - i.e. time is of the essence. The battery will age quicker being dash charged all the time.
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Can you provide any factual basis for this statement? Research or articles from established professionals in the field of battery charging?
Everything I've read from reliable sources state that the biggest impact on battery longevity is temperature. Repeated heating (or extreme cooling for that matter) will accelerate the "aging" process, as you put it. OnePlus has actually solved this problem by offloading the energy conversion that causes heat to the power brick, leaving the phone cool during charging (pretty ingenious). I've also read that not always charging the battery fully to 100% can prolong longevity, which is why you get charging strategies on laptops that will stop charging at 80% or 60% if you leave your laptop plugged in 24/7.
Point being, the ONLY way to slowly charge this device would be to use a third party charger and/or cable.
The reason I ask this, is that the manufacturer, OnePlus, clearly states in their documentation that comes with the phone or dash chargers to ONLY use the charger and cable that came with the phone.
Please charge the OnePlus Dash device only with the official Dash Power Adapter and Dash Type-C Cable. Using unauthorized adapter can be dangerous and may void your warranty.
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I'm not completely opposed to the idea that this could just be a marketing ploy to get you to buy their own adapter and accessories, but again just want to know if there's any substantial proof that fast charging, by itself, degrades the battery faster, of if it's just a case of incorrect tribal knowledge.
Thanks.

You are correct that the rate of charge and discharge alone are not the only deciding factors on lipo life and certainly not the most decisive ones.
Excessive heat, especially on high charge levels, is the biggest factor for increased aging.
As you mentioned extreme charging levels (completely empty or full) will also contribute to faster aging, albeit the impact is not that extreme for these low current-draw Lipos used in our phones (as opposed to high-drain Lipos for instance).
Discharge and Charge at high rates will also contribute to the speed of aging, but not as much as heat.
When a lipo spends most of its time one medium charging levels at moderate temperatures and is only charged and discharged with low rates on it will have the longest service life.
This is common for all Lipos, just how much a low or high rate is for that particular battery differs (low drain, high capacity VS high drain, low capacity cell)
With Lipos everything is a compromise. Max and min voltages, max temperatures, max draw are values the manufacturer has chosen as the best compromise to reach the intended MTBF. All these numbers are not physical absolute barriers.

Charges 0-100% in 1hr 30 mins

Second place after SuperCharge (even first gen) from Huawei. Much better than QC 3.0

Klanac89 said:
Second place after SuperCharge (even first gen) from Huawei. Much better than QC 3.0
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Nope. Super VOOC (OPPO) is hands down the fastest!

Gustav Karlsson said:
Nope. Super VOOC (OPPO) is hands down the fastest!
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First of all, how many device support Super VOOC? How many device you can buy outside China with VOOC?
Super VOOC is 50W, the same like Huaweis SuperCharge 2.
Did you test SuperCharge 2 or VOOC?

My OP6T charges up to 100% in 1hr 22mins, so I don't charge overnight anymore. Go to sleep on 40% and charge in the morning

The combo of battery life and crazy fast charging is for the first time breaking me of the "plug it in overnight" habit that I have had since my first cell phone over a decade ago. I can keep my charger at my desk, plug it in for half an hour, and be at 100% with almost no chance of running out before the next morning. That means fewer vampire chargers around the house wasting power, and fewer charge cycles lost leaving the phone plugged in long after it's full. I wish I had swapped to OnePlus sooner - I think I have finally found a phone maker to call my favorite.

The charging Speed with "Dash charge" is amazing.
Within few minutes the battery is from 0% to over 50%!
Generelly I can only say: Amazing battery life. The best I ever had with a phone (except Nokia 3310).

I started to charge when the battery was 5%. It took around 1 hour 20 mins. I can say this to be quite faster when compared to the devices I have used previously, that too when the size of the battery is much bigger than the previous phones.

Illrigger said:
The combo of battery life and crazy fast charging is for the first time breaking me of the "plug it in overnight" habit that I have had since my first cell phone over a decade ago. I can keep my charger at my desk, plug it in for half an hour, and be at 100% with almost no chance of running out before the next morning. That means fewer vampire chargers around the house wasting power, and fewer charge cycles lost leaving the phone plugged in long after it's full. I wish I had swapped to OnePlus sooner - I think I have finally found a phone maker to call my favorite.
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The incredibly fast charging, coupled with the insane battery life (especially in dark mode) has made me totally OK with no wireless charging. I used to leave my phone on the charging pad at my desk most of the day, and on my nightstand charging pad overnight. I never had to worry about charging at all and plugged in maybe 20 times max over the last two years with my Note5. I said I'd never buy a phone without wireless charging, but the $350 or so I got for my Note5 exchange for this phone was just too tempting to overlook, particularly if it set up my family for the next two to three years (our current phones didn't have band 71 and Samsung said no more security updates). The only thing I was really worried about was wireless charging and whether or not the battery life and dash charging would be enough for me to overcome range anxiety.
It has.

So I'm thinking of keeping my dash charger at home ,and my 30w aukey charger at work ,I take it this will be ok to use ?

Gustav Karlsson said:
Nope. Super VOOC (OPPO) is hands down the fastest!
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mate 20 pro, charges 4200 mAh in 1 hour.

Shady282 said:
mate 20 pro, charges 4200 mAh in 1 hour.
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Oppo Find X (Lamborghini edition) charges 3300 mAh in 35 min...

combat goofwing said:
So I'm thinking of keeping my dash charger at home ,and my 30w aukey charger at work ,I take it this will be ok to use ?
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It should be. If you are starting from full in the morning I doubt you will even need the charger are work except for very rare instances. I have gotten 7 hours SOT that was mostly gaming on this thing, moderate use you can easily get 24 hours, light use around 48.

Charging speed

To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Samsung Galaxy A70 can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

Honestly, it charges pretty quickly, it just HEAVILY slow down once u reach 80% which is good for battery, but not convenient to me.
from my testings, 0-80% in 60 minutes at OPTIMAL conditions (medium battery save, no wifi, no sync, no location, airplane mode, AOD off, brightness 1%)
i think this is absolutely perfect in every way, just wished I could simply charge it to 100% as fast for long days.

In my situation the super fast charging doesn't work somehow, or either I don't understand it. From 30-80 takes rough 2 hours. Or is it maybe because of the different country I flashed on?

Kcetin20 said:
In my situation the super fast charging doesn't work somehow, or either I don't understand it. From 30-80 takes rough 2 hours. Or is it maybe because of the different country I flashed on?
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Are you using the original charging cable and power adapter? From 30 to 80 should take only 40-50 minutes.
And to really fast charge, you must close the screen (AOD can work, doesn't matter)

y.erenbektas said:
Are you using the original charging cable and power adapter? From 30 to 80 should take only 40-50 minutes.
And to really fast charge, you must close the screen (AOD can work, doesn't matter)
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Yes of course I use original cable and charger,
My setting is optimised and screen is off

Kcetin20 said:
Yes of course I use original cable and charger,
My setting is optimised and screen is off
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When the screen is locked and you are charging the phone, does it say "fast charging" on the lock screen or notifications?

y.erenbektas said:
Are you using the original charging cable and power adapter? From 30 to 80 should take only 40-50 minutes.
And to really fast charge, you must close the screen (AOD can work, doesn't matter)
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y.erenbektas said:
When the screen is locked and you are charging the phone, does it say "fast charging" on the lock screen or notifications?
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Yes it says fast charging, or does it need to say super fast charging?

Kcetin20 said:
Yes it says fast charging, or does it need to say super fast charging?
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no it says fast charging, without super. Still, 2 hours to charge from 30 to 80 is not normal at all. Even from 0% to 100% takes only 1 hour and 30-40 minutes. If this keeps happening, I think you should take your phone to a Samsung Service and let them check what's wrong.

y.erenbektas said:
no it says fast charging, without super. Still, 2 hours to charge from 30 to 80 is not normal at all. Even from 0% to 100% takes only 1 hour and 30-40 minutes. If this keeps happening, I think you should take your phone to a Samsung Service and let them check what's wrong.
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I will try flash stock firmware first after I will check out with service center, anyway thanks for your help.

My phone charges from 5 to 85 in 60 mins. And takes 1hr and 30 mins to 100 overall satisfied with the speed. I had an Asus Max Pro m2 and it takes 2 and a half hour from 5 to 100

My A70 charges a little faster than 1% per 1 minute of charge. But the fast charger is not much faster than a regular charger. I get about a little less than 1% per 1 minute of charge on a regular charger.
100% charge on the A70's large battery lasts a long time.
Certain programs will drain the battery though, such as wifi transfer program opened in the background, or bittorrent type programs opened in the background, so make sure to optimize or make sure the apps are closed when not in use.

Mine is charging as Rixil 1' s charging. I am very happy with that speedy charging.

Fast charging using normal adapter?

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.