about fast charge - Mi 3 Q&A, Help & Troubleshooting

AFAIK Mi3 does support QuickCharge 2.0 right?
im using cm13 right now and the highest i can get is 1500mA using ampere
it should be higher right?

It's OK. 1500mA is the right one. Stock charger can deliver upto 10W of power. So it's quick charge 1.0

im using aukey charger QuickCharge 2.0 certified by Qualcomm

Might be limited in device and vendor tree.

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Quick charger query

Someone using quick charger 3.0 can tell me does it support quick charging or no ? I am thinking of buying one so does it support ?I am using NOS ROM with clarity kernel as of now
I hear santoni just support qc 2.0
bhavikjajal said:
Someone using quick charger 3.0 can tell me does it support quick charging or no ? I am thinking of buying one so does it support ?I am using NOS ROM with clarity kernel as of now
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Yes. It support QC3.0. I tested it with GreenCell QC3.0 MultiUSB Charger and Xiaomi Mi2i Powerbank - charging time is reduced by approximately 30/40 minutes
Devhost97 said:
Yes. It support QC3.0. I tested it with GreenCell QC3.0 MultiUSB Charger and Xiaomi Mi2i Powerbank - charging time is reduced by approximately 30/40 minutes
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What is the voltage you receiving ? 9v,12v or 5v and amp as well ?
I checked it too. During charging, the charger regulates between 12 and 9 V voltage and 1.5A at 12V, 2A at 9V and 2.2A at 5V. When charging with the QuickCharge charger the biggest differences can be seen at the time of charging the first 40%, while in the later phases also large differences are visible, but not on such a large scale.

Does Quick Charge work with the N8?

I have a RavPower QC2.0 charger which has one QC-enabled port and 3 "Standard" charge ports. The QC feature worked well with my old Moto X Style. I've noticed however that the charge current is the same from the QC port as when I connect it to one of the standard ports i.e. about 1500 mA. This is despite the QC indicator showing on the charger when I connect my new N8 on the QC port.
Is the N8 supposed to be fully compatible with QC2? I gather QC3 is meant to be backwards compatible with QC2 so I'm a bit confused.
Yes, it's compatible with the old QC 2.0 standard.
Recently I charged it with a QC 2.0 charger and this had the green led on during the charging (with non-QC compatible phone the led is blue).
Sent from my Nokia 8 using XDA Labs
The QC indicator was on on my charger as well, but the charge rate didn't seem quick.
Curiously, I've also noticed that the phone seems to charge very quickly from the USB port in my car which, AFAIK, is not QC compatible! Weird.

USB-C PD vs Adaptive Fast Charge?

Does anyone happen to know which one charges these phones faster? If I'm not mistaken, Adaptive Fast Charge is basically QC 2.0 right? So wouldn't USB-C PD be faster?
My phone hasn't been shipped yet, otherwise I would test it out myself.
The phone only supports Samsung's Adaptive fast charging, so using a USB-C PD charger won't make a difference.
It also supports Qualcomm Quick Charge 3.0 as fast charging, just like the S8 and S9s.
purchio said:
It also supports Qualcomm Quick Charge 3.0 as fast charging, just like the S8 and S9s.
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Wrong
purchio said:
It also supports Qualcomm Quick Charge 3.0 as fast charging, just like the S8 and S9s.
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Nope - Quick Charge 2.0 maybe, but not 3.0.
Wagedroid said:
Wrong
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Devhux said:
Nope - Quick Charge 2.0 maybe, but not 3.0.
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That's a QC 3.0 only powerbank according to it's specs.
Take your own conclusions from that...
It charges as fast as the original wall adapter
purchio said:
That's a QC 3.0 only powerbank according to it's specs.
Take your own conclusions from that...
It charges as fast as the original wall adapter
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S10 devices only support 2.0. your previous post said it supports 3.0. it does not.
Any charger will charge the phone, but not faster than the specs allow. I can have a 25w charger but my S10 will not take the 25w capacity
Wagedroid said:
S10 devices only support 2.0. your previous post said it supports 3.0. it does not.
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Connect a QC 3.0 charger, see the charging speed, come to this thread again.
go check out the 2000$ Fold, it listed "compatible with qc 2.0".
2000$ phone supports qc 2.0
s10 support qc 3.0 HAHAHAHA
hope you get what i saying ..
purchio said:
Connect a QC 3.0 charger, see the charging speed, come to this thread again.
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Why would I go through all that just to prove what we both already know. You even said it yourself that it charges as fast as wall adapter. Wall adapter that ships with the phone is NOT 3.0, so what are you trying to prove exactly? Wall adapter charges at 2.0 amps.
Please stop misinforming people, it's nothing personal, just trying to state the facts. See attachment
purchio said:
Connect a QC 3.0 charger, see the charging speed, come to this thread again.
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You need to contact Samsung and let them know this, I'm not sure they're even aware of this feature.
chill guys, its cause QC is backward compatible.. so using QC3.0 you will get fast charging up to QC2.0.. not too sure about USB-C PD but i can confirm when using USB-C PD charger, you will get fast charging as well.. not too sure which is faster.. probably the same if the charger can charge up to 15W which is the official max charging speed for S10 btw.
edit: i use the same USB-C PD charger for nintendo switch and S10+
Tel864 said:
You need to contact Samsung and let them know this, I'm not sure they're even aware of this feature.
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Lmao. I'm really hoping they release the 25w in next update. That would make the device perfect for me.
---------- Post added at 12:23 AM ---------- Previous post was at 12:19 AM ----------
hayoungpinkpanda said:
chill guys, its cause QC is backward compatible.. so using QC3.0 you will get fast charging up to QC2.0.. not too sure about USB-C PD but i can confirm when using USB-C PD charger, you will get fast charging as well.. not too sure which is faster.. probably the same if the charger can charge up to 15W which is the official max charging speed for S10 btw.
edit: i use the same USB-C PD charger for nintendo switch and S10+
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I called chief, he said that we were chill, and that the phones charging capabilities was already stated in this thread. Thanks tho
Obviously Quick Charge 3.0 would be backwards compatible with Quick Charge 2.0. There's no such thing as "Quick Charge 3.0 only." If there was, boy would we have a lot of fried/exploded devices as they received more current than they were rated for.
Haha did you guys even look up what QC 2 and QC 3 were? They aren't that much different, just the step size. Both have a max of 18 W. You would need a volt meter to prove the phone was QC 3 compatible, showing it charging at a voltage that was not near 5, 9, or 12 volts. As far as I'm aware, the S10 either charges at 5V with Fast Charging disabled, or at 9 V if fast charging is enabled. That would adhear to the QC 2 spec, not the QC 3 spec, since it can't do voltages between 5 and 9. If the S10 gets an update for 25W charging, I believe it would charge at 12 V. Still, only QC 2 compliant, but not QC 3.
USB-C PD can go up to 100 W. I think 45 W and 90 W for laptops is pretty common. The Huawei P30 Pro can supposedly charge at 40 W.
hayoungpinkpanda said:
chill guys, its cause QC is backward compatible.. so using QC3.0 you will get fast charging up to QC2.0.. not too sure about USB-C PD but i can confirm when using USB-C PD charger, you will get fast charging as well.. not too sure which is faster.. probably the same if the charger can charge up to 15W which is the official max charging speed for S10 btw.
edit: i use the same USB-C PD charger for nintendo switch and S10+
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Thank you!
Guess they were having a hard time understanding that QC 3.0/2.0/whatever give the fastest charging speeds that S10 can handle.
On my S9 with Nintendo Switch USB-C PD charger I couldn't get 15w, just 10w (aprox. 5v and 2a).
purchio said:
It also supports Qualcomm Quick Charge 3.0 as fast charging, just like the S8 and S9s.
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I've even quoted my first comment.
Just read what I said: that QC 3.0 charges also give S10 the fastest charging speeds it can handle, NOT QC 3.0 WATTS/SPEED/WHATEVER.
Pretty simple to understand..
Lol retraction at its finest.
"i HavE a qC 4.0 aDapTeR, iT chArGeS mY phOne LiKe A 2.0 aDapTeR"
What did we learn here? Anyone?
purchio said:
On my S9 with Nintendo Switch USB-C PD charger I couldn't get 15w, just 10w (aprox. 5v and 2a).
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Thats likely because you have fast charging disabled. USB-C PD chargers should be capable of charging at 9V 1.67 amps (15W) the same as any QC 2.0 or QC 3.0 or Adaptive Fast Charging capable device. They are just different standards.
Haven't tried using the original charger yet, but my s10 charges on my usb pd capable charger for about 1hr and 20 from 15% to 100%
I'm able to charge up my S10 with a QC. 3.0 power bank and car charger in about the same time as the stock wall charger.
Sent from my SM-G973U using Tapatalk

Official Xiaomi"s super fast 27 w charger

its a QC 3 certified charger and A2 supports QC 4+ right?
so wether it takes 9v 2a (18w) or 9v 3a (27w) to charge
https://store.mi.com/in/item/3192900008
and also want to know is it safe to use moto's turbo charger because its output is max 15w
candykala said:
its a QC 3 certified charger and A2 supports QC 4+ right?
so wether it takes 9v 2a (18w) or 9v 3a (27w) to charge
https://store.mi.com/in/item/3192900008
and also want to know is it safe to use moto's turbo charger because its output is max 15w
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In general terms, V×A = W. Now, voltage is pushed and current is pulled. So it doesn't matter what the Amp is, what matters is that the Voltage should not exceed the max specs. That is why Oppo's VOOC chargers are best suited. They keep volt at 5V while increasing the ampere to 3/4 Amp to increase Watt without damaging the phone.
candykala said:
its a QC 3 certified charger and A2 supports QC 4+ right?
so wether it takes 9v 2a (18w) or 9v 3a (27w) to charge
https://store.mi.com/in/item/3192900008
and also want to know is it safe to use moto's turbo charger because its output is max 15w
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Qualcomm's quick charge technology is backward compatible. So a QC4+ supporting device will happily work with a QC 3 charger.
Also, QC 4+ technology is design to withstand upto 20v and upto 4.6Amps (not at the same time) and at the same time QC 4 and 4+ are no different the specifications there are same there is only some internal changes.
QC 4 achieves 27w not via the QC technology but it uses USB-PD which is a universal technology released on 2012 and unlike QC it's not proprietary Qualcomm's tech. USB-PD for our device works in the range of 3-11V and 0-3A.
Also, charging current and voltage is controlled by the device, not the charger. You can safely charge your phone using a MacBook charger which can provide upto 60w of power and it won't harm your phone.
#tldr : yes it's totally safe to use any charger with your phone. Unless it's not a cheap one which doesn't comply to basic quality standards you are good to go.
Hello
Can i use the samaung 9v 1.5A for my xiaomi mi a2 because phone came with 5V 2A , can this samsung original charger damage my phone ?

My Phone won't charge at 27W

I Have the Global Version of the Mi 9, and it wont charge at 27W at all, the highest that i've gotten was 2060mA.
I tried using the Anker PowerPort III Mini 30Watts Charger, and Also the RAVpower RP-PB097 which charges at 45watts.
the Phone is Rooted and i tried using the CrDroid 6.9 ROM with Quantic Kernel 4.14.198, and also tried Xiaomi.EU MIUI 12 Weekly Build 20.9.24
any ideas why and how to fix it ?
For 27W to work, you need QC 4.0+ certified charger. QC 3.0 only won't work even if the advertised power is higher (it would be more useable to tablets and laptops), including Xiaomi's own CDQ02ZM 45W charger. But Xiaomi has MDY-10-EL that exactly supports it and I have as well, granted that's the only QC 4.0+ certified charger I have and therefore 27W only works with that.
leledumbo said:
For 27W to work, you need QC 4.0+ certified charger. QC 3.0 only won't work even if the advertised power is higher (it would be more useable to tablets and laptops), including Xiaomi's own CDQ02ZM 45W charger. But Xiaomi has MDY-10-EL that exactly supports it and I have as well, granted that's the only QC 4.0+ certified charger I have and therefore 27W only works with that.
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My Anker Charger is QC4.0 Certified and i couldn't even get 15w with it
BahaEzawi said:
My Anker Charger is QC4.0 Certified and i couldn't even get 15w with it
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Now that's weird, unless you measure when the battery is above 5% or so. I'll record with my USB doctor attached so you can see the incoming voltage/current yourself.
i have same problem too i tested with my dady's 33w xiaomi charger even i couldnt get 18 w with 33w charger.

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