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New note 4 and question about first charge

Hello friends,
So I just got my Note 4 and i'm wondering how long should I keep it in charge for the first time? And should I drain it on first use or charge it when it's at let's say 20%??
Thanks in advance.

14 hrs, dont drain, battery should be between 20-80% before charging in normal use, fast charge off.

@zurkx
Thanks for the reply.
Are you sure about the 14 hours??? I thought Li-ion batteries don't need that long of a charging time !!!

XeroHertZ said:
@zurkxAre you sure about the 14 hours??? I thought Li-ion batteries don't need that long of a charging time !!!
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Please happily ignore that "advices".
Use Fast charge, charging takes exactly till the battery is full, that's about 1,5 hours for a full charge.
I don't see ANY sense in charging a LiIo battery "fuller than full", just impossible nonsense.
LiIo batteries suffer of aging, slightly increased by the number of charges, highly (!) increased by overheating, not of any memory effects.
There is NO "breaking in" of the Note 4s battery, amperage of fast charge doesn't come even near the safety limits, won't cause quick degradation or overheating.
So just don't listen go the immortal myths and "ancient wisdom" propagated by people not aware of the fact that battery technology indeed changed over the decades.

Chefproll said:
Please happily ignore that "advices".
Use Fast charge, charging takes exactly till the battery is full, that's about 1,5 hours for a full charge.
I don't see ANY sense in charging a LiIo battery "fuller than full", just impossible nonsense.
LiIo batteries suffer of aging, slightly increased by the number of charges, highly (!) increased by overheating, not of any memory effects.
There is NO "breaking in" of the Note 4s battery, amperage of fast charge doesn't come even near the safety limits, won't cause quick degradation or overheating.
So just don't listen go the immortal myths and "ancient wisdom" propagated by people not aware of the fact that battery technology indeed changed over the decades.
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Thanks Chefprol.I have done some research on charging the battery and have come to a conclusion that once it's charged I can use it straight away but and then drain it to 18 to 20% then charge it fully.

Chefproll said:
Please happily ignore that "advices".
Use Fast charge, charging takes exactly till the battery is full, that's about 1,5 hours for a full charge.
I don't see ANY sense in charging a LiIo battery "fuller than full", just impossible nonsense.
LiIo batteries suffer of aging, slightly increased by the number of charges, highly (!) increased by overheating, not of any memory effects.
There is NO "breaking in" of the Note 4s battery, amperage of fast charge doesn't come even near the safety limits, won't cause quick degradation or overheating.
So just don't listen go the immortal myths and "ancient wisdom" propagated by people not aware of the fact that battery technology indeed changed over the decades.
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Click to collapse
Thanks ! i tought it would be a old myth to first drain the batery and then fully load it but as far as i know its only with old phones and mp3 players and such.
hope i will get my note 4 today ! waiting for it since monday

Fast Charge is not really a useful feature for me, it just hurts the battery more in the long run

what about the thoughts on conditioning the battery?
Sent from my SM-N910C using XDA Free mobile app

There's no need to condition the battery, its a lithium battery.
If you're having battery drain issues I would suggest you clear your data cache.
ddaharu said:
what about the thoughts on conditioning the battery?
Sent from my SM-N910C using XDA Free mobile app
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Click to collapse

this is the same guy making up stuff about the note 4 GPS being bad.
dont listen to fools.
First charge needs to be 14 hours to trickle charge the battery to full and make sure the meter is calibrated to a full battery.
fast charge does reduce battery life since it charges at higher voltage and amperage. any battery gets damaged a little by that. best is a slow charge (preferably Qi) at a normal charging voltage. Slower the better for longer battery life. if you want convenience over battery life then by all means fast charge and mess it up and replace after 2-3 years.

Who's post are you referring to?
zurkx said:
this is the same guy making up stuff about the note 4 GPS being bad.
dont listen to fools.
First charge needs to be 14 hours to trickle charge the battery to full and make sure the meter is calibrated to a full battery.
fast charge does reduce battery life since it charges at higher voltage and amperage. any battery gets damaged a little by that. best is a slow charge (preferably Qi) at a normal charging voltage. Slower the better for longer battery life. if you want convenience over battery life then by all means fast charge and mess it up and replace after 2-3 years.
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Click to collapse

arjun90 said:
Who's post are you referring to?
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It's mine. That guy already bumped into me a while ago, now it's time for his revenge.
I'll care for that, now...
---------- Post added at 02:09 PM ---------- Previous post was at 01:32 PM ----------
zurkx said:
this is the same guy making up stuff about the note 4 GPS being bad.
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So here we go; you asked for it...
My critism about the Note 4 refers to it's GPS receiver, which is "deaf" compared to the competition and shows frequent signal drops.
More here: http://forum.xda-developers.com/note-4/general/gps-close-to-unusable-t2948602
dont listen to fools.
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Indeed - have a look:
First charge needs to be 14 hours to trickle charge the battery to full and make sure the meter is calibrated to a full battery.
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I already advised to realize this is 2014 battery technology, not the ancient batteries of the past.
Short: There is no "trickle charge" with Lithium-Ion-batteries.
See this: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries - quote: "The difference lies in a higher voltage per cell, tighter voltage tolerance and the absence of trickle or float charge at full charge."
fast charge does reduce battery life since it charges at higher voltage and amperage. any battery gets damaged a little by that.
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Quote: "The charge rate of a typical consumer Li-ion battery is between 0.5 and 1C in Stage 1, and the charge time is about three hours. Manufacturers recommend charging the 18650 cell at 0.8C or less."
"C" is the capacity, 3220 mAh with our Note 4's battery. So we're save to charge with a current (milliamperes, "mA") of up to 3220 mA - if we follow the manufacturer's advice for the older type of batteries of that kind (18650 is an old warrior in the field), there's still 2576 A left.
So what does our fast charge supply deliver ? Look at it's ratings: 5 V, 2 A (2000 mA).
So even fast charge is far below the limits - our real limit is 3220 mA, but fast charging just uses 2000 mA.
Sound and safe.
Wonder about me highlighting "higher voltage" in zurkx's highly elaborate statement in red ? - Answer is above: The voltage does NOT change, it is NOT higher. Of course not !
The worst enemies of LiIon batteries are heat and age.
Heat is generated by a) placing the device at a hot spot (like behind the car's windscreen or in bright sunlight), b) by using demanding features like 4K video recording or highend games, c) by charging .
a) Your call. Just don't let your Note get hot. Overheating destroys your battery in no time. We're lucky we've got an exchangeable battery - so nothing to really worry about.
b) Your call. See a).
c) Charging produces some heat, especially on the "last mile", when the battery is "almost full", because the battery is a bit reluctant of getting charged up to the brim. So more heat is generated in that last phase. It's not much, won't reach the safety limits. It just can't, because the build-in charging circuits limits the current if heat gets up.
By the way: That integrated charging circuits are propped with safety measures, checking charge, condition, temperature and the like.
So even if you hook up a charger capable of providing 20 whopping amperes, the circuits just won't let that happen.
There is no way of providing the battery too much current; it's automatically limited.
best is a slow charge (preferably Qi) at a normal charging voltage. Slower the better for longer battery life.
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Again; welcome to the 21st century. We don't need any slow charge. It's the opposite.
Charging right slow has the danger that apps on the phone draw more power than the charge provides. That may drain your battery instead of filling it.
Plus: If you hook up the charger for long, it will be recharged (charge gets "topped off") frequenly. And every new charging attempt has a slightly negative impact on the battery's life; it's like wearing it a bit down. - Charge often, reduce your battery's life. That damage is tiny, by the way. But it is there, so hooking up your charger for many hours slowly kills your battery.
Now for the aging:
if you want convenience over battery life then by all means fast charge and mess it up and replace after 2-3 years.
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Click to collapse
LiIon battery ARE AGING, up from the time of manufacture.
You all know that: You charge a device like you're told by the instructions - but after 1 to 3 years you notice a severe drop of usage time, a drop of capacity.
That's aging.
NOTHING you can do against that but buying a new battery.
So your battery will lose it's capacity over time; if you use it or not. You all know that, you all experienced that.
With the Note 4, we can happily buy a new battery if the old one runs out; it's that simple. But as a normal Li Ion battery reaches it's shelf live after 2 or 3 years anyway, there's NO (!) need of burdening it and you with slow charge. The results are exactly the same, with the difference that you save precious time with fast charging.
And now allow me quoting again:
dont listen to fools.
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Have a nice day, all of you except one.

youre completely wrong.
The QuickCharge tech charges at higher VOLTAGE and AMPERAGE.
http://www.androidauthority.com/quick-charge-explained-563838/
Quick Charge 2.0
Voltages 5v 5v / 9v / 12v
Max Current 2A 3A
Snapdragon 200, 400, 410, 615, 800, 801, 805
The rest is just BS as usual. You have no idea what youre talking about. Dumping 9V (Samsung Note 4 AFC) into a 5V battery makes it charge hotter and faster and degrades it significantly. After two weeks of fast charge i lost a small chunk off the top of my brand new battery.
just bad advice as usual.

zurkx said:
youre completely wrong.
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Yes, indeed. I was completely wrong by believing you'd understand some simple things.
In fact, I am not sure if I should take your statements for serious or just for a joke.
The QuickCharge tech charges at higher VOLTAGE and AMPERAGE.
Voltages 5v 5v / 9v / 12v
Max Current 2A 3A
Click to expand...
Click to collapse
So you REALLY believe that changes of the output voltage of the POWER SUPPLY lead to the BATTERY charged with more volts ?
You can't be serious. That's technically impossible.
Let's put it easy:
If you insert your power supply into a 110 V receptacle in the USA, you get 5 V output.
So according to your "logic", using the same power supply in Europe (230 V) increases the voltage to 10 V ?
No. Just NO.
That higher POWER SUPPLY voltage is used for fulfilling the rule W = V * A (Watt = Volt * Ampere); just to be able to squeeze more power through the power supply's cable.
In the Note 4 and in the charging circuit, that voltage OF COURSE will be regulated down to the regular charging voltage - just with the benefit to carry more amperes.
So the CHARGING VOLTAGE stays the same; it does NOT follow the voltage supplied by the POWER SUPPLY. It never does.
So fast charging does NOT (read that: NOT !) increase the charging voltage. It cannot.
Got that now ? - Or do I need to put it ever more simple ?
It does not help using swearing words like "fool" or "bull****".
But it could help just saying: "Oh, sorry, I was wrong. - My apologies."
Make yourself at home with the basics of lithium ion and charging technology. THEN speak up.
Ah, overlooked something:
After two weeks of fast charge i lost a small chunk off the top of my brand new battery.
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1) Hope that chunk fell somewhere you were able to pick it up again.
2) How to you KNOW that ? I expect a detailled description about how you did the magic of finding out that your battery doesn't charge to 100 %.
3) If you KNEW that fast charging would kill your battery, wise man - why did you allegedly use the feature ? - Sorry, man... Your statements are not very trustworthy. I guess you never used that feature, just say so to strengthen your shaky point of view. Please don't mess with a perception psychologist.
4) If your battery really suffered, that might be due to your highly acclaimed and absolutely pointless 14-hours-charging-marathons, causing a permanent charge on/charge off cycle, weakening your battery.
So please just stop bashing a real useful feature of the Note 4. If you just love waiting ages for batteries to charge - your preference. But please stop spreading false facts about things you very obviously are not at home with.
And a last thing which might stop that aimless harassing fire of yours: I am HAM, a licenced amateur radio operator, holding the highest German licence class. These are the people who know a bit about volts and amperes.

how hard is it for you to understand that quickcharge 2.0 outputs higher VOLTAGE and AMPERAGE to charge the battery ? The charger charges the BATTERY AT 9V 1.67A up to 50% and then switches over to the regular 5V 2A charge rate. INPUT VOLTAGE (110V or 230V) has nothing to do with OUTPUT VOLTAGE. It charges the battery at 9V REGARDLESS of INPUT VOLTAGE.
edit:
also it has nothing to do with the cable. you must be crazy if you think a cable issue exists whether you transfer 15W or 10W across it. the cable is rated for well beyond that. the reason for the higher voltage is that modern lithium ions can accept high voltage charge rates with limited damage at low amperage. the reason they cut it off at 50% is the battery would be severely damaged if you tried to charge it to 100% and overshot. so yes quickcharge 2.0 really does charge your battery at a higher voltage than it was designed to be charged at. and no they dont have a magical transformer on your phone to go from 9V to 5V. otherwise they would be using it all the time and fast charge 9V to 100%. the wall plug is the only thing which has a transformer and the phone uses what it gets from there. they arent going to build half of another wall plug (9V DC-DC) and stuff it into the phone. it would generate heat and add bulk. Instead the PMIC "spikes" the battery with higher voltage and keeps it roughly constant (load modulation) by communicating with the quickcharge 2.0 AFC on the other end.

Hopeless.

I just love these battery threads, there's always some muppet who says the battery needs conditioning and must first be charged for a suitably ridiculous length of time. When it's charged it's charged, lithium batteries have no memory effect so the idea of conditioning them is moronic
Sent from my SM-N910F using XDA Free mobile app

yes they have no memory effect. why ? because you say so.
other people believe otherwise because they actually test things out for themselves :
http://www.psi.ch/media/memory-effect-now-also-found-in-lithium-ion-batteries
http://pocketnow.com/2013/05/03/li-ion-batteries-memory-effect
http://www.nature.com/nmat/journal/v12/n6/full/nmat3623.html

no need to keep it for 14 hours, as they said in the catalog you only need to charge it till it's full, then unplug the charger.

Hello again !
After all cooled down a bit, here's some more information about that dreaded HIGH VOLTAGE fast charging uses which seemingly makes some of you wet your pants.
First, there's an experiment you can do yourself. You don't need to do - but it's quite impressive and gives you some proof of the things I say.
Get two 9 V batteries; the small rectangle ones we all know. Connect the positive contact of the first battery with the negative contact of the second. Thus you get an 18 volts DC power source.
Get a thin, isolated wire, short-circuit the open contacts with the wire. Wait.
Nothing special will happen, maybe the wire will get a little warm - and your batteries will eventually die.
(If you use a VERY thing wires, it might heat up.)
Now take a length of the same wire, do the same using your car's battery (12 – 13.8 V DC).
WARNING !
1) Take the battery out of the car, set it on solid ground with nothing combustible near !!! Do NOT try this with the battery still in the car !!!
2) Use pliers to connect the wire with the battery contacts !!!
3) Do that OUTDOORS !!!
Short-circuit the battery contacts using the pliers with the wire.
You don't need to wait. The cable will turn into a smoking, burning, white-hot thing in an instant.
Huh ? - We've got 18 V with just nothing happening, we've got just 12 V wreaking instant havoc and destruction !?
Amperage is the key !
Voltage alone does not cause the destruction, it's the amperage.
9 V batteries cannot provide sufficient amperes for killing the wire; 12 V car batteries do.
Short: High amperage kills wires, high voltage doesn't.
So back to our topic...
To fast charge our Note 4's battery, we need power, watts. But the tiny wires in the Note 4 can't withstand a high wattage; they would heat up like the wire connected to the 12 V car battery.
So Samsung uses a little trick, according to Ohm's law: W = V * A, W is watts, V is volts, A is amperes.
So we can achieve a high wattage by EITHER using a higher voltage OR a higher amperage.
Higher amperage does not work because it will kill the tiny wires in the Note.
So Samsung raised the voltage for carrying more watts from the power supply via the internal Note 4's cabling to the charging circuit.
That higher voltage gets transformed down to the normal charging voltage at the charging circuit.
Your battery is charged with the usual voltage, but with the benefits of a higher amperage.
That's all the magic: That higher voltage is used to carry more wattage to the charging circuit, but not beyond. Nothing else.
And that's why it does not harm your battery; charging voltage will not change - your battery just gets charged faster, always monitored by the charging circuit which will lower the charge accordingly if needed, so your battery will always be safe. That's why the "last mile" (charge from about 92 % to 100 %) takes more time to charge - because the charging circuit automatically lowers the charge to protect your battery.
So don't be afraid of that higher voltage; it never reaches your battery, it is just a means for transferring higher wattage via tiny wires.
Note: You ever wondered why Europeans use 230 V instead of 110 V ? - That's the reason. Being able to carry more watts over regular power lines without risking the wires heating up too much. It's not a means of destruction, it's the opposite.

Turn off quick charge

Is there a way to turn off the fast charging?

Just use a charger that doesn't provide quick charge.

XblackdemonX said:
Just use a charger that doesn't provide quick charge.
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ok, so if I use a htc one m7 charger, does it works?

Why would you want to turn off the feature?

ipmanwck said:
Why would you want to turn off the feature?
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To have more charge and discharge cycles, so as to have a battery that lasts for a longer time, in terms of age of the battery.

It would be nice an option to disable it, like in the SGS7. Especially for the people like me that charge the phone at night and doesn't need quick charge.
Enviado desde mi ZTE A2017G mediante Tapatalk

kutavyz said:
It would be nice an option to disable it, like in the SGS7. Especially for the people like me that charge the phone at night and doesn't need quick charge.
Enviado desde mi ZTE A2017G mediante Tapatalk
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Why not just use a charger without quickcharge, e. g. 2A output or even 1A if you prefer? Very simple solution!

icaros1530 said:
Why not just use a charger without quickcharge, e. g. 2A output or even 1A if you prefer? Very simple solution!
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This is what I'm doing now. I'm using my girlfriend charger, but my car charger is QC, and I don't always want to use it and I'm not want to have two chargers in the car...
Enviado desde mi ZTE A2017G mediante Tapatalk

kutavyz said:
This is what I'm doing now. I'm using my girlfriend charger, but my car charger is QC, and I don't always want to use it and I'm not want to have two chargers in the car...
Enviado desde mi ZTE A2017G mediante Tapatalk
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Okay, that makes sense! We better get an option to turn it off then.

I noticed the Axon charging current drops off somewhere above 90-95% capacity. Using the app Ampere and with the Axon's included QC3.0 charger, the phone will charge at a current of ~3A when the battery is below ~80-90%, and then when the charge capacity is above that, the charge current drops to around 0.3A for a slower charge up to full capacity. The charge current may even drop lower but I haven't observed Ampere like a hawk when charging.
I'm curious what's causing that smart charge current drop: the phone or the in box QC3.0 charger. If it's the phone, then using an older charger with a max output of 2-2.5A may be ideal for battery longevity. If the Axon battery is truly 3250mAh, then with a preferred C-rate of say 0.7C (I've seen recommended C-rates from 0.5C to 0.8C), we get 2275mA as the ideal constant charge current. If the phone also drops the charge current of this older charger when capacity is nearing full then it would certainly be better than using the QC3.0 charger.
However, if all of this fluctuating charge current is controlled by the QC3.0 charger itself, then it might be the better charger option versus one with a lower rated current output. The OP on this thread should test both out with Ampere and share the results.
Some good reading:
What is C-rate?
How to prolong li-ion batteries

Bucatino said:
To have more charge and discharge cycles, so as to have a battery that lasts for a longer time, in terms of age of the battery.
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Quick charge rates are designed around the capability of the battery. I have extensive experience with system design around rechargeable cells of all major chemistries, and the large batteries currently used in phones can be charged at much higher rates simply because there is more surface area (more mAh) that in older phones. Quick Charge will never charge at a rate unsafe for your battery. Your battery is more likely to fail from simply age or damage due to a drop as opposed to quick charging.
The bigger the battery, the higher the acceptable charging current. At over 3000 mAh, the Axon 7 battery can safely be charged at a very high current.

jswede said:
the large batteries currently used in phones can be charged at much higher rates simply because there is more surface area (more mAh) that in older phones. Quick Charge will never charge at a rate unsafe for your battery. Your battery is more likely to fail from simply age or damage due to a drop as opposed to quick charging.
The bigger the battery, the higher the acceptable charging current. At over 3000 mAh, the Axon 7 battery can safely be charged at a very high current.
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Absolutely correct, like my previous post, but not an answer to the question asked. I agree that since the capacity is high at 3250mAh, a constant C-rate of 1.0C (up to 3250mA charge current) is safe. However the question is not about safety, but longevity of performance.
Lowering the charging C-rate to 0.5-0.8C could potentially mean the difference of good battery capacity performance for 1 year versus 1.5-2 years.
With Ampere I've observed the charge current on the Axon with QC3.0 charger as high as 3200mAh. At 1C, that's perfectly safe, but less than ideal for battery longevity. We're simply looking for an alternative at a lower C-rate of 0.5-0.8C.

jlomein said:
Absolutely correct, like my previous post, but not an answer to the question asked. I agree that since the capacity is high at 3250mAh, a constant C-rate of 1.0C (up to 3250mA charge current) is safe. However the question is not about safety, but longevity of performance.
Lowering the charging C-rate to 0.5-0.8C could potentially mean the difference of good battery capacity performance for 1 year versus 1.5-2 years.
With Ampere I've observed the charge current on the Axon with QC3.0 charger as high as 3200mAh. At 1C, that's perfectly safe, but less than ideal for battery longevity. We're simply looking for an alternative at a lower C-rate of 0.5-0.8C.
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So, is better a 5V- 1A than the original QC of axon?
I charge it in the night when i sleep, and I don't need a quick charge during the day.

Bucatino said:
So, is better a 5V- 1A than the original QC of axon?
I charge it in the night when i sleep, and I don't need a quick charge during the day.
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Explained In short and ELI5.
If you charge ~300( charge cycles) times with the QC3 you will lose ~10% battery capacity.
10% off 3250mah is 325mah.
So roughly (depending on usage) after a year you will lose 325mah from your battery.
If you charge slow it is prolonged.

celoxocis said:
Explained In short and ELI5.
If you charge ~300( charge cycles) times with the QC3 you will lose ~10% battery capacity.
10% off 3250mah is 325mah.
So roughly (depending on usage) after a year you will lose 325mah from your battery.
If you charge slow it is prolonged.
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ok, I want to use this phone for 2/3 years =)

Better mi a1 charger?

Have anyone better and cheap charger what is supported now on oreo? i want to buy it...

Try AliExpress.com

I use a 10w iPad charger and it's great. Charges really fast

TerQQ said:
Have anyone better and cheap charger what is supported now on oreo? i want to buy it...
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whats wrong with the stock charger?

in oreo update is fast charging feature, then i am searching charger to use that.

Sir i wanted to know which charger should i use to get fast charging after oreo update??

TerQQ said:
in oreo update is fast charging feature, then i am searching charger to use that.
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Yogesh9694 said:
Sir i wanted to know which charger should i use to get fast charging after oreo update??
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This has been discussed, it's not charging any faster than it did in Nougat. All they did was add the text to tell you it was fast charging, which to them means charging above 1A. True fast charging would be 50% in less than 30 minutes, definitely this update is not going to do that, no matter what charger you use.

But after oreo update there is a little improvement in charging speed... I charged my A1 in switched off and phones charged in 1hr 35 min from 0 to 100%...and i used the stock charger...

Yogesh9694 said:
But after oreo update there is a little improvement in charging speed... I charged my A1 in switched off and phones charged in 1hr 35 min from 0 to 100%...and i used the stock charger...
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Doing some very basic math.
3000mAh battery.
Charging rate of 2000mAh
That would equate, if the battery were truly at 0%, and charged truly to 100% full 3000mAh capacity, of 90 minutes, in an ideal world. Of course, there are some things that come into play, such as overhead.
With my USB measuring tool, I am able to see the voltage around 5.10-5.20v, and the amperage around 1.85-1.94A. This is with a Qualcomm QuickCharge 3.0 charger, so I know for certain that it is not doing a higher voltage charge. I can also see that it is not doing a higher amperage charge.
Given this, I will have to see about doing a complete drain on the phone, and then charging, and seeing where 100% is indicated on the phone, in terms of capacity, as my tool can measure the amount sent over USB as well.

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 Xiaomi Redmi Note 5 Pro can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

2 Hour With Stock Charger

I didn't completely check the ratings and time but stock charger DOES NOT fast charge this phone. as the Stock Charger isnt QC2.0 Supported. However this mobile does support QC2.0 but you'll have to test QC2.0 Charger 1st. Not all QC2.0 Chargers work on this mobile. Its a little picky. So go to a shop check QC2.0 Chargers on your mobile. when you get circle Sign on notification bar along side battery then it means that device is fast charging. if not then there will be no circle around the charging sign (Flash sign)
also idt this mobile supports QC3.0 but i dont have tools to check amps volts of charger.
Lenovo's original QC3.0 charger doesnt work on this phone. I've tested. but Motorola's QC3.0 Charger works fine.

my rn5 pro , takes apporx 3 hours to charge completely!

So far I'm a bit slow, a little bit more than 3 hours to completely charge the phone. Might have something to do with the cable.
My current charging setup:
- ANKER 5 port 40W
- a docomo USB cable
Planning to buy a proper 20AWG usb cable and a QC2.0 adapter.

I just bought a Letv charger which supported qc3.0 for about 4$ on taobao

I'm currently on the 9.5.11 build and it takes about 4-5 hours to completely charge the device using stock charger, And it took about 2-3 hours while on 9.2 build.
I wonder if the Mi QC 3.0 based charger would improve the situation for us?

piyush95 said:
I'm currently on the 9.5.11 build and it takes about 4-5 hours to completely charge the device using stock charger, And it took about 2-3 hours while on 9.2 build.
I wonder if the Mi QC 3.0 based charger would improve the situation for us?
Click to expand...
Click to collapse
Slow charge is a known bug in 9.5.11 build. Wait for an update or change ROM

13,2W for me

I recieved 9.2.13 update yesterday and have been noticing significant boost to charging speeds since then...yet to fully charge from 0 so can't comment on total time but as per Ampere, charging speeds are in range of 1500 to 1700 mah

1000 mA max with 5v 2amp and Work Normal Speed with Stock Charger
Approximately 2 hour for charge phone

I use the app Ampere (free in Playstore) to measure power input and with a normal charger (non QC) it shows up to 1600 mAh charging amount and from almost 0 to 100% it is taking 2,5 hours. One question: is there a way to tell if QuickCharge is active?

@Kusie
Look on your"s phone status bar. With normal charging there is thunder icon next to the battery. With QC active, thunder in in circle as far as I remember. Info about active QC should be also displayed in the bottom of your lockscreen
Sent from my flo using XDA Labs

Using my usb inline meter, i'm getting ~6.5v and ~2.2A, with a Tronsmart usb cable and QC 3.0 Truro charger, screen off and about 44% remaining on battery. Will try when the battery is lower some other time.

takes around 2hours to charge 100% using stock charger..

1h 30min with a Quick Charger from Anker.

Cel00 said:
1h 30min with a Quick Charger from Anker.
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Not possible.

Incogn said:
Not possible.
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Of Course it's true, why should I lie?
Turned off the Phone at 5% and charged it to 100%....

Cel00 said:
Of Course it's true, why should I lie?
Turned off the Phone at 5% and charged it to 100%....
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I have no idea why would you do that... But read reviews, no matter what kind of charger you use, this phone only supports qc 2.0 version. From 0 to 100, in 1 hour, you only get like 55%, and in the end it slows down even more, so yes, impossible to fully charge in 1.5h, TECHNICALLY IMPOSSIBLE. You are either lying, or mixed times and got confused. Judging by technical parameters, the best this phone can do should be around 2hours from 0 to 100.

Incogn said:
I have no idea why would you do that... But read reviews, no matter what kind of charger you use, this phone only supports qc 2.0 version. From 0 to 100, in 1 hour, you only get like 55%, and in the end it slows down even more, so yes, impossible to fully charge in 1.5h, TECHNICALLY IMPOSSIBLE. You are either lying, or mixed times and got confused. Judging by technical parameters, the best this phone can do should be around 2hours from 0 to 100.
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I just posted above that I was able to get QC 3.0 charging rates. Approximately 2.2A (fluctuates +/- 0.1A) and 6.6v (fluctuates +/- 0.2v) using a QC 3.0 charger and Tronsmart cable. Measured using an inline meter, not software.

Charging speed throttling poor stock thermal values

So the issue is I bought quick charge 3.0 adapter from xiaomi site but it isn't making much difference because stock thermal values are too limiting
It charges 2800 ma while temp is >37 c
2300-2400 at > 39c
After that at 1900
Is there any way to start throttling from 44-45 c

im shocked 2800mA charginig speed in RN7 as it is capable of 18W fast charging only
but well from my experience with different phones is that as the phone going to full charge especially after 85 % i experienced mobile heatup and the charging current drops, but i think your issue may arise during low charge mode as well
first of all charge your screen while keeping display off and after every 15 minutes you can check for the average charging current and temperature for that session via Accubattery easily
by the way which app are you using for charging current

app is not accurate for checking, use USB voltmeter direct to charger to check charging amps,
in a hot country with high temperatures >30C.....then quick charge will throttle faster as battery heats.

mi 2a charger (redmi note 7pro)
even regular 2a charger (with redmi n7pro) thermal throttle.
i put my phone in charging for an hour ago and i checked suddenly and it has charged only 20% (21% to 42%) and after changing charger the charging speed was back on and also the mi charger was hot would be aroung 30 to 35 celcius.