Quick Charge Not Working

[codingcapuchin]

I have an LG, Samsung and a third-party Quick Charge 3.0 compatible charger. All chargers work on all 3 other devices (Samsung charger can quick charge LG, etc) - all except for my Sony Xperia XZ1 Compact. Both their service center and customer support claim that I need to have a Sony Quick Charger, specifically the UCH12, for it to fast charge.

I don't see any reason why this should be the case. Sony uses the same Qualcomm chipsets as other brands, so there seems to be no reason that other QC 3.0 compatible chargers don't work with the Sony phone, unless Sony deliberately locks out other brand chargers. Has anyone experienced the same issue or is it just me?

[Snapples]

I already did that; Mine's charging with 1.5A, even when connected to a QC3.0 charger.

[ed8907]

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@GAZ082 wrote:

Guys, you can install the app Ampere to check the current value.

https://play.google.com/store/apps/details?id=com.gombosdev.ampere

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I installed Ampere. Up to 60%, it charges 2040mA but after that it gets very slow.

[emeses]

I use aukey qc 3.0 model pa-y2. And only got 1.4A.. This is so frustrating 

The battery care mode is on though. I will try without it tomorrow..   (no effect)

[emeses]

Is it confirmed that xz1 compact doesn't work with non-sony qc charger? I have tried to search everywhere for the solution and tried to pinpoint the problem. Aukey works well with xzp.. It would be nice if someone can confirm this, so I can try to refund the incompatible one. This is so frustrating.. 

Samsung QC can work with my phone delivering 2A. I think Aukey PA-Y2 is not compatible with this phone or i just simply got a faulty product. However, please note that my friend's Aukey PA-T2 can charge XZP with the good result (2A)..

[Snapples]

I don't know how to recognize if QC is active or not.
It's really fast with and without a QC charger.
Display doesn't show anything with either of them.

Ampere doesn't seem to support QC as well and thus probably displays the wrong values.

[codingcapuchin]

So after a lot of back and forth with sony support and their service centers, apparently sony is unique in that they do not indicate when it is fast charging. This isn't the first phone to do this /t5/Xperia-XZ/Fast-charging-message-not-displayed/td-p/1169903

I used accubattery and it indicates charging amps accurately, but QC works not by tweaking VOLTAGE and not AMPs. Unfortunately voltage readings are not available from the app so we're out of luck. Only way to test is to measure charging times, something I intend to do with my other quick chargers for comparison

[emeses]

well, you can check the voltage with ampere app. from what my observation, the voltage is kept around 4V (assuming ampere app measures Voltage properly), only the Amperage varies depends on the charger. Using Sony uch12 within that voltage range, you should be getting 2.7A, and ampere app shows 2A which is about right (minus phone usage 0.3A-1A depends on the active activities). I believe 2A-4V is the QC standard for this handheld. I tried using another charger (Samsung quick charger), it also gave me 2A reading from ampere app. (PS: my aukey charger seems to be unable to QC this phone for some reason)

Wattage delivered by these chargers would be around 8Watt nett give or take. It is still far from qc3.0 tech max wattage can offer. However, I believe Sony are trying to prolong the battery life by not overheating the phone. Hence, the amperage cap. As you see, charging with constant 2A will get the phone a bit warm. Having said that, ~1.5 hours charging time isn't that bad..  getting 10% to 60% in ~40 minutes in not a bad of a time.

PS: this is a rough calculation, pls cmiiw. Cheers

[codingcapuchin]

My point is that the voltage reading in the apps aren't accurate. Quick charge increases power output by modifying the voltage to about 6-12V. From my understanding the battery is meant to continually discharge about 4-5V, so Google would see no reason to give accurate voltage readings. Hence an app wouldn't be able provide accurate wattage readings

[emeses]

i dont think that's the issue here. Seeing the charger UCH12 spec, it doesn't matter how much the voltage is since the Amperage will follow (according to the spec written) to deliver the same Wattage. 

Reading this threat below (i know it is old), i suspect Sony hasn't solved the fast charging issue, or them being Japanese just want to play it safe with the Amperage (i know for one, Japanese products want to play it VERY safe)

/t5/Xperia-X-Compact/Charger-UCH12-far-away-from-charging-fast/td-p/1175339

[codingcapuchin]

It is indeed possible that Sony regulates the amperage for safety reasons, and apparently they do not have an indicator when fast charging is actually occuring. However that does not necessarily mean they have disabled Quick Charge.

According to Sony official support, the UCH12 charger's output: 5V/2700mA (13.5W), 9V/1800mA (16.2W), 12V/1350mA (16.2W)

A quick rundown of how power delivery is calculated: Volts X amps = watts. Even if Sony caps their amperage delivery to 2 amps (2000 mA or milliamps), that does not mean that they have disabled Quick Charge. 2700mA is the maximum charger output, and says nothing about the amps the phone is capable of receiving. The Quick Charge specification generally increases power delivery by increasing voltage. This is the 9V/1800mA spec, and if charging at this spec then ampere or accubattery would rightfully record the amperage at below 2000mA, but if it can't read the voltage accurately then we would not have an accurate reading of power delivery.

If this is the case, one way to figure if Quick Charge is working on the phone is to charge using a few different chargers and measure the time it takes to charge a set percentage, e.g time to charge from 40% to 80%. I have 3 chargers I can use to do this - the charger that came in the box rated @ 5V/1500mA, an Anker multicharger rated @ 5V/2400mA, and an LG QC 3.0 charger rated @ 9V/1800mA.

Or of course the faster way would be to get a USB power meter to directly measure the current and voltage when connected to different chargers.