Mi3/Mi4 supports Quick Charge 2.0?!

[The Dork Knight Rises]

Alright, can anyone confirm this for me? Wait, lemme start at the beginning...

So I was reading this Android Police article, hoping to get some quoting material for those times when a member thinks USB Fast Charge is the same as Qualcomm Quick Charge 2.0...
http://www.androidpolice.com/2015/06/12/quick-rapid-turbo-and-fast-charging-explained-what-you-need-to-know-about-charging-your-smartphone/

Y'know, all those times people ask a kernel dev "Why isn't Fast Charge speeding up my charging?" so I could swoop in and crush their dreams with "Fast charge means only more current draw when USB charging via PC. You're thinking Qualcomm Quick Charge 2.0, which needs hardware support, so ain't gonna happen."

But turns out, the Mi3/Mi4 DOES have the supported hardware (for Quick Charge 2.0 mind you, not v1.0 like in the Nexus 5)
https://www.qualcomm.com/documents/quick-charge-device-list
(Official document from Qualcomm listing the Xiaomi devices amongst the handful of QC 2.0 devices)

So can someone tell me if this needs kernel support? Or can I just buy a Quick Charger off Amazon and enjoy the benefits?
Or if this is at all LEGIT?

 

[Riichard63]

Alright, can anyone confirm this for me? Wait, lemme start at the beginning...

So I was reading this Android Police article, hoping to get some quoting material for those times when a member thinks USB Fast Charge is the same as Qualcomm Quick Charge 2.0...
http://www.androidpolice.com/2015/06/12/quick-rapid-turbo-and-fast-charging-explained-what-you-need-to-know-about-charging-your-smartphone/

Y'know, all those times people ask a kernel dev "Why isn't Fast Charge speeding up my charging?" so I could swoop in and crush their dreams with "Fast charge means only more current draw when USB charging via PC. You're thinking Qualcomm Quick Charge 2.0, which needs hardware support, so ain't gonna happen."

But turns out, the Mi3/Mi4 DOES have the supported hardware (for Quick Charge 2.0 mind you, not v1.0 like in the Nexus 5)
https://www.qualcomm.com/documents/quick-charge-device-list
(Official document from Qualcomm listing the Xiaomi devices amongst the handful of QC 2.0 devices)

So can someone tell me if this needs kernel support? Or can I just buy a Quick Charger off Amazon and enjoy the benefits?
Or if this is at all LEGIT?

In fact I own an Mi4 which comes with a 2A charger that is normally supporting quick charge 2.0.
With MIUI it's charging 1.8A (of course 1.8A is around 2A minus phone consumption)
On all custom rom it's just charging max 1.3A with about same consumption, or even less.

So Mi4 support quick charge 2.0 with MIUI but not with any custom rom or kernel.

 

[volcano619]

Anything regarding Mi3 ??

 

[Riichard63]

Anything regarding Mi3 ??

I guess it's the same. Snapdragon 800 and 801 are really close each other.

Envoyé de mon MI 4 en utilisant Tapatalk

 

[Bitti09]

Does anyone have a quick Charger 2.0 and a mi3 ?

 

[Skullpluggery]

Does anyone have a quick Charger 2.0 and a mi3 ?

I do have a Bavin 2.0 A charger and as mentioned it is obly 1.3A below

Sent from my MI 3W using XDA Free mobile app

 

[Bitti09]

I do have a Bavin 2.0 A charger and as mentioned it is obly 1.3A below

Sent from my MI 3W using XDA Free mobile app

Put the following line into build.prop , reboot and test if qc works:

persist.usb.hvdcp.detect=true

 

[Skullpluggery]

Put the following line into build.prop , reboot and test if qc works:

persist.usb.hvdcp.detect=true

In a minute! Currently crimping network cables here.

Sent from my MI 3W using XDA Free mobile app

 

[Skullpluggery]

In the attachment 1 that is the stock charger of mi3 , in the attachment 2 that is the current of quick charge without the build.prop line. And in the last attachment that is that current with the buil.prop line.

In conclusion, without the build.prop line the lcd becomes super sensitive but higher current, with the build.prop line the lcd is fine but lower current than before
Sent from my MI 3W using XDA Free mobile app

 

[Bitti09]

In the attachment 1 that is the stock charger of mi3 , in the attachment 2 that is the current of quick charge without the build.prop line. And in the last attachment that is that current with the buil.prop line.

In conclusion, without the build.prop line the lcd becomes super sensitive but higher current, with the build.prop line the lcd is fine but lower current than before
Sent from my MI 3W using XDA Free mobile app

hm, ivan commentetd this build.prop line as "Quick Chager" . the rest of quick charge is already in our device&vendor trees.

 

[Skullpluggery]

hm, ivan commentetd this build.prop line as "Quick Chager" . the rest of quick charge is already in our device&vendor trees.

Must be rom related? In miui i can get 1500+ but lcd gone crazy and in stock i got 1000 below. In ivan i can get around 1900+ average without the lcd going crazy

Sent from my MI 3W using XDA Free mobile app

 

[The Dork Knight Rises]

In fact I own an Mi4 which comes with a 2A charger that is normally supporting quick charge 2.0.
With MIUI it's charging 1.8A (of course 1.8A is around 2A minus phone consumption)
On all custom rom it's just charging max 1.3A with about same consumption, or even less.

So Mi4 support quick charge 2.0 with MIUI but not with any custom rom or kernel.

I do have a Bavin 2.0 A charger and as mentioned it is obly 1.3A below

Sent from my MI 3W using XDA Free mobile app

I don't think a 2A charger is an actual Quick Charger. (Obv it charges quicker compared to 1A ones )
Apparently for Quick Charge 2.0 technology, your Wattage/Power input should be around 18W (wattage is found by multiplying the voltage written on charger, usually 5V with current you're getting in ampere). Quick Charge 1.0 supported upto 10W which we're gettng with the 2A chargers, but I think we need an actual Qualcomm certified Quick Charger (which allow currents of upto 3A apparently) to see QC 2.0 at work.

 

[Ringford]

I don't think a 2A charger is an actual Quick Charger. (Obv it charges quicker compared to 1A ones [emoji14])
Apparently for Quick Charge 2.0 technology, your Wattage/Power input should be around 18W (wattage is found by multiplying the voltage written on charger, usually 5V with current you're getting in ampere). Quick Charge 1.0 supported upto 10W which we're gettng with the 2A chargers, but I think we need an actual Qualcomm certified Quick Charger (which allow currents of upto 3A apparently) to see QC 2.0 at work.

Yes, this guy is right. 2A charger with 5V output is not a quick charger this guy talking about (Qualcomm Quick Charger 2.0). 12V charger output is.

 

[mad-extrem]

Mi4 charger comes with 3 voltages 5V-2A, 9V-1.2A, 12V-1A...but maximum we get is 12*1=12W

 

[mad-extrem]

Charging on xc kernel (cm ROM)

 

[shauyan]

MI3 is not support any quickcharge. Even you use 2.0A charger, will give you same about 1.2A

 

[userprince]

What i know is i had Mi3 in past now i have Mi4 and mi4 comes with a Qualcomm Quick charger 12V-1A. It charges way too fast than Mi3 charger.
I use Mi3 Charger 5V-2A on Mi4 it took 2-3 Hours to get fully charged whereas Mi4 Charger takes 1-2 Hours to get fully charged.

It heats up a lot Charger + Mi4 Both

 

[extrahacker]

MI3W support QC 2.0, but needed QC 2.0 charger, for example Xiaomi Quick Charger 2.0 aka MDY-3-EB I`m found it here