Lack of QC support. - Xiaomi Mi A3 Questions & Answers

Hi everyone, I got couple of USB testers that I know works perfectly fine and also a QC4 charger (which is backwards compatible) and I noticed that Mi A3 does not support QC whatsoever. Device only charges at maximum of 10Ws (5v 2A, is the maximum I got). Did anyone else notice that? gsmarena listing shows it allegedly supports 18W but I havent been able to get to charge at those speeds, can anyone else confirm Mi A3 is charging at 10W max?
Before you all comment it supports "rapid charge" phone says its rapid charging for 10W, I tried at different charge levels using different cables chargers.

I have a genuine Xiaomi 18W fast charger & the phone correctly identifies it & fast charging is working fine. May be your unit is faulty or something.

I actually just rechecked. It actually ramps up the voltage slowly, 0.1 increments then eventually reaches 12v at 1.5amps. Previous phone I had would set the voltage to 9V (I had a LG G4) instantly. It works! sorry for the confusion.

Related

Does plus really support Quick charging?

Hi i read that redmi 5 plus support qc so i had aquired samsung quick charger.When plugged phone shows quick charging but when i mesure mA while charing with qc and with normal charger there is no big difference according mesuring software.So what is real truth about qc?
petric1 said:
Hi i read that redmi 5 plus support qc so i had aquired samsung quick charger.When plugged phone shows quick charging but when i mesure mA while charing with qc and with normal charger there is no big difference according mesuring software.So what is real truth about qc?
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Redmi 5 Plus supports QC (3.0 to be exact, as it's Snapdragon 625). Apps measuring charge rate won't show you real current, it's only approximation.
I've tested my charger, which supports QC 3.0, my 5+ uses 9Volts at almost 2Amps (when charging from 15-20%). Measuring software won't show you voltage that you are using to charge so you may not see the difference. But doing quick math - 5V*2A=10W (standard charging brick) whereas QC charger will use 9V*2A=18W. That means you are charging with 80% more power.
Keep in mind that charging with QC will get your phone a bit warmer, so phone will start to throttle the current, meaning that you won't be charging from 0% to 100% at full 18W
Yes. It charges with 9v and 1,7 amp max. (9v is static, amp is variable, that means it has only QC 2.0 mode.)
Its way faster than standart charger. I have Tronsmart QC 3.0 charger. But you can go with QC 2.0 charger.

Fast Charging

Is fast charging working with this phone?
I have belkin QC3 and I am thinking of buying this budget phone. I hope it is working even in sleeping mode.
Thanks
It seems to be a case of hit and miss so far. When I measure the charging current for the bundled charger/cable using Ampere it didn't even get close to the 2.4A current we should get.
Update: The max current I saw during charging is around 1950 mah, which isn't really considered fast charging.
Snapdragon 636 does support QC4 according to its datasheet but real life impression with the bundled nokia charger doesn't feel so quick indeed. I suspect poor charger quality is the culprit here (despite the fact it is 18W rated in specs) since no QC logo is printed on it
When plugged in, screen shows rapid chrging and cuts it off when around 80% + for battery protection I guess
If anyone charges the phone on an officially rated QC3 or QC4 charger please let us know
I also notice that the phone doesn't charge very fast using QC chargers, but when plugged into the USB C port of my (Anker or RAVpower) battery, it charges super quick. So I think USB-PD works better on this phone.
Specs wise, our phone's SD636 supports QC 4 which incorporates USB-PD standard, so if you charge on a certified QC4/usb pd charger plus the required cable, it will play fast and nice
Strange thing is that Qualcomm lists it only as QC3 device in their original device list found here https://www.qualcomm.com/documents/quick-charge-device-list as if Nokia hasn't fully enabled the chipset's feature (?) for some reason...
Well, as long you see it charge super fast, I guess you can be happy with that

Baseus 30W charger at Mi 9

does anyone tried to charge Mi 9 with this Baseus charger?
https://www.aliexpress.com/item/32988045731.html?spm=a2g0o.cart.0.0.71f43c00TyHdOp
is this charger compatible with 27W xiaomi charging?
I think it's just Quick Charge 3.0. You should buy the 27W charger imo. But i could be wrong
I have it, it does quick charge but not charge turbo
Good I stopped by XDA before purchasing it.
It does say if you scroll down on its specs it's a QC4 charger, but I assumed the described output would be a sum of both USB ports working simultaneously.
Already posted about it some weeks ago.
https://forum.xda-developers.com/showpost.php?p=79530777&postcount=73
It's indeed just a QC 4.0 charger. Will only do 18W.
Hi, I have one. For it to work properly you have to have the cable of more than 30w.
Load much faster than the original that comes in the box. I did a quick test from 75% to 100% with the phone turned off and charged in 25min; so you can assume if it's fast or not.
WTF ; does this phone even do QC4 ... the Xiaomi offical charger is 3.0 and I bought a $68 dollars Belkin QC : 4.0+ offical as per reviews and it caps out at. 3470 : it NEVER has said fast or TURBO and it ofen Ampere reports 1800 mah ? Can anyone explain this in any way
Do you really have to post the same thing in every single charger related topic ?
Ataemonus said:
Do you really have to post the same thing in every single charger related topic ?
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I couldn't find this :/
hardtheory said:
I have it, it does quick charge but not charge turbo
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Thanks for info dude
I suspect that Turbo Charge only happens with the 27W factory charger.
Because my Hama QC4+ charger, certified by Qualcomm, charges definitely faster than the 18W charger found in the package, but does not say Charge Fast or even Charge Turbo.
twojastara-5 said:
does anyone tried to charge Mi 9 with this Baseus charger?
https://www.aliexpress.com/item/32988045731.html?spm=a2g0o.cart.0.0.71f43c00TyHdOp
is this charger compatible with 27W xiaomi charging?
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Click to collapse
Call me crazy but I think it will charge the device at 27W speed.
A lot of people don't seem to realize but the "Xiaomi Turbo Charger 27W" is actually QC3, not QC4+, and it does charge the device at 27W. If you find a QC4+ charger that supports 27W and up, you will still get 27W charging but you won't see "Charge Turbo" because it will use the better, newer charging standard.
This can make charge turbo QC 3.0 and it's cheaper and with more ports:
https://www.banggood.com/AiNaU-3-US...amsung-S8-Letv-Xiaomi6-mi5-mi6-p-1168215.html
lusp00ky said:
This can make charge turbo QC 3.0 and it's cheaper and with more ports:
https://www.banggood.com/AiNaU-3-US...amsung-S8-Letv-Xiaomi6-mi5-mi6-p-1168215.html
Click to expand...
Click to collapse
Yeah but it can only charge at standard QC3 speeds, aka 18W at max. 9V/2A like the original one does. But the original one can also do 12V/1.5A. So it does not "Turbo Charge".
Careful many poster here are confused. My BELKIN true QC4.0+ never ever charged over 3200mA and averaged out at under 2200mA. Posters who speak about things without testing their theories are really frustrating. Do yourself a favor don't believe this phone accepts QC4 or QC 4.0+ (at least not @July 2019) only QC 3.0 NON FAKE xiaomi 27w can do the 4600mA + it would seem. Turbo charging is required for extremely rapid charge times. Make sure you get OFFICIAL 20V 1.35A from Xiaomi for Turbo Charge sustained charge and under one hour 0--100%
I also purchased a QC 4.0+ Hama DC charger cause Xiaomi doesn't make a DC charger to my knowledge. Guess what ; 18w ish charging speeds .. no Fast or Turbo classification ...
XIAOMI Hoe do you call this phone a QC 4.0/4.0+ unit !!! Cause look close at the charger Turbo pictures they are all using the "Original QC 3.0 Xiaomi charger that we ALL should have got in the box. Instead many of us have wasted tonnes of money and time buying useless to us QC 4.0+ tech that doesn't work or WORSE fake chargers that don't do more than 18w !! By the time we we have ordered 3-4 different chargers trying to get it to work we have to order it on Ali or gearbest or Gearvita. Cause the company does make them after all!! Enjoy the brutal shipping fees and heavy wait times. Well we order this and that trying to get the darn thing to work. So annoyed right now
Hi, I got the original charger and this if it gives the turbocharged 27w charge, however the baseus charger charges the same as the one that comes in the box or with the wireless charge.
I made this short video: https://youtu.be/nFBoPxORzEg
https://forum.xda-developers.com/k20-pro/how-to/mi-9t-pro-30w-charger-experiment-t4003595
read this. Also tested with a mi9 that my fried had. same result.( Turbo charging up to 30W using the baseus charger)
Posted for those who end up here like me and read mixed info
I also have the Baseus charger mentioned above (BS-EU906), the variant with 2 usb A ports.
When I charge with the cable from my samsung galaxy tab S5e it charges with a bit over 4200mA 20w-21w.
But when I charge with my Baseus 2m 5a capable cable (CATSS-B0G), it never goes above 3400mA ~14w.
It still chargers fast, but it is not what was advertised. Both the cable and charger are rated for QC3.
Baseus GaN charger 65W + Baseus 5A cable reaches 5000mA in Ampere, which is assuming 5V (that's what Ampere is assuming), equals to 25W. The fact is voltage in QC is never stable, it's the factor that allows it to dynamically supply power based on various parameters: battery temp, device temp, battery capacity and so on. If you have a USB-C USB doctor (and it should be more accurate than any software based monitoring) you can watch yourself that both the voltage and current are alternating constantly.

Quick Charge, Power Delivery and USB charging for Realme 7 Pro

Hi, I would like to ask about SuperDart 65W (10V, 6.5A) from Realme 7 Pro. It charges every of its two batteries at 5V and 6.5A (32.5W each) but I found information that it suppots Power Delivery and Quick Charge 18W as well. With PD and QC you can charge the battery at 9V , 12V, 15V etc. but not 10V. Does anyone know at what voltage the smartphone will be charged if you use PD or QC charger?
Is it safe to charge it with higher/less voltage? (e.g. 2x4.5V or 2x6V if 5V is needed for one battery)
And what about the standard 5V chargers and usb 3.1 (e.g laptop)? Is it possible to charge 7 Pro with it?
Generally, all fast charges will drop ther voltage when the connected phone doesn't support it.
With lower voltage you wont have any problems other than the speed of charging, which will obviously decrease
Standard 5V chargers will work just fine
Normal laptop usb will work just fine, in fact you will be lucky if the laptop supports any sort of fast charging at all
You are 100% safe to charge with pretty much any charger to my understandment

Question Charging speed with USB-PD chargers?

What charging speeds can you get with QC, USB-PD or USB-PD PPS chargers? Higher than 7.5W / 5v 1.5A at least?
I see OnePlus lists it's charging speed as "18W Fast Charging (9V/2A)". And 9v doesn't match the 5v or 10v that I've read Dash/Warp/VOOC has used. So I'm hoping that means it supports more that just Dash/Warp.
If the nord n200 does require only Dash/Warp, anyone know which version?
According to this link:
https://www.reddit.com/r/oneplus/comments/u78u1o
The "PD" indicator on a cable with integrated power meter lights up, so the author thinks it is USB-PD.
Getting 10.2W (8.88v 1.15A) with QC. Battery was at 75% though. Have to test further at a lower charge level.
Used a Motorola "turbopower" USB-A charger, model: SC-22, which apparently does Qualcomm QC. Labeled as capable of 15W, 5v 3A, 9v 1.6A or 12v 1.2A.
~edit~
16.3W (8.94v 1.83A) via Qualcomm QC with a different cable and the battery at 10%. Max rate my charger is capable of.

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