Database Users

Why does it take 1 year for the battery to charge?

Sarcasm, haha laugh a little.
But really, do you guys notice that it takes a long time for the battery to charge?
I think when available, I'll buy a bunch of batteries just to have handy.

well the battery is 1500mAh the nexus charged pretty quickly but it was 1400mAh i am not sure how much difference 100mAh will make on charging the battery but that could be a possibility.

Charging with the computer will always be slower, if that's what you're using.

I wonder if its the charger. The provided charger has an output rating of 0.7A. I know some microusb chargers I have seen are rated as high as 1.0A. That could be the difference.

soklean said:
well the battery is 1500mAh the nexus charged pretty quickly but it was 1400mAh i am not sure how much difference 100mAh will make on charging the battery but that could be a possibility.
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I was thinking the same thing...hhmm could 100mAh make that much of a difference?

heygrl said:
Charging with the computer will always be slower, if that's what you're using.
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I always try to avoid using the computer to charge my phone. It just seems to take awfully long even plugged into the wall.

landale said:
I wonder if its the charger. The provided charger has an output rating of 0.7A. I know some microusb chargers I have seen are rated as high as 1.0A. That could be the difference.
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Interesting...that could be. However, maybe it's 0.7A for a reason? Perhaps the battery needs to have it at that "flow rate." ???

We did get a different charger over the i9000, they had a separate USB cable and microUSB wall charger. We obviously don't have that setup.
Some phones have Li-Pol batteries and they have to charge differently. This could be why it's taking so long to recharge.

check a tmobile store or website for the new portable micro usb charger. charges your phone on the go and recharges itself via a usb charger the vibrant ships with or your computer. i got mine and was a lifesaver the other night when i needed to leave my house with 10% charged.

I hate saying this, but: I literally LOL'd from the title of this thread.
I completely agree. Charging takes fuggin' forever. My guess would be that turning the device off helps speed this up, tremendously. But of course, who wants to do that?
That said, battery life has been impressively long, provided you turn off Samsung's widgets. :/

iunlock said:
Interesting...that could be. However, maybe it's 0.7A for a reason? Perhaps the battery needs to have it at that "flow rate." ???
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That would be a huge design oversight if a generic charger caused problems with the battery. I'm sure Samsung thought about the user charging with a generic charger.

Mine charges pretty fast I'm using the usb that came with the moto cliq

iceshinobi said:
Mine charges pretty fast I'm using the usb that came with the moto cliq
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How fast is fast, iceshinobi?

I have conditioned my battery twice and going from empty with the phone off and pluged into the wall not via usb-pc, took me over 4hrs each time.
If the charger is 0.7 going to a 1.0 would be a huge improvement. The only worry would be the extra heat and problems that might cause. With NiMH batteries quick charging is preferable to slow charging, is this the same for Li-ion?

came here for insight as well, woke up at like 5am, phone was almost dead, 10% battery or so
turned it off, plugged it in to the wall charger and it is now 8am and it is maybe 60-70% charged
what the hell?
with my g1 turned off i can go from 0 to 100% charge in like an hour or so using a USB port. now i know the battery is smaller but c'mon... this is ridiculous.

Could it be that the phone just has to break in? When I first got G1 it would take about 4 hours to charge I remember, now a year and a half later I can get it to 80-90 percent in 1 and a half.

The computer USB standard is 100 to 500 milliamp, the USB walloulet adapter (charger) Is 700 milliamp, our batteries are 1500 milliamp and that's why.
USB cables have a certain standards witch includes voltage and current standards.
If you want a fast charger look for a hard wired 1000-1200 milliamp charger with a micro USB connector on ebay.

siberslug said:
The computer USB standard is 100 to 500 milliamp, the USB walloulet adapter (charger) Is 700 milliamp, our batteries are 1500 milliamp and that's why.
USB cables have a certain standards witch includes voltage and current standards.
If you want a fast charger look for a hard wired 1000-1200 milliamp charger with a micro USB connector on ebay.
Click to expand...
Click to collapse
Interesting...having a 1000+ milliamp charger shouldn't cause heat issues would it for pumping in more juice at a higher rate?

Not charging when connected with PC

I recently bought new tab, it is getting charged normally when plugged in power socket. But when i plug it in laptop USB port or any PC port, it would not charge instead I can transfer data etc. I am using the original USB cable which came in box. Does any one has faced same issue?
Sent from my GT-P1000 using XDA App

charging
Samsung have engineered it so you have to even use their mains charger. Car chargers and wall chargers have to be Samsung tab brand. Not sure but there is talk of AVUSB charge cable being released. Pretty sure this has already been covered.

Turn off the screen and wifi and data network and it will charge very slowly over usb.
Sent from my SGH-T849 using XDA App

The fact of the matter is the tablet requires more/not the right amount of power that your USB port can deliver.
We always here all these theories about why.. but here is the simple and only reason why.
To keep the techinical stuff short and simple, Li-Poly and other batteries have a predetermined lifetime and one of the determining factors to how long they last is the rate of charge (charge rate) time and the exact amount of mHa capacity of the battery.
This is NOT a Samsung marketing scheme as it is exactly the same reason the iPad cannot be charged through USB.
I'll give you a quick example:
If you buy rechargable batteries, Ni-Mh that state they can be charged at 2500mHa (capacity/rate) and you charge them on a 15 minute charger that delivers the right amount of power (1.2 volts) and not the correct rate (lets say they are rated for 2500 and you use a charger thats rated for more) this causes the battery life to be deminished drasitcally.
If you charge the same 2500mha batteries with a lower rating charger, they will take a lot longer to charge completely since it is at a slow mHa, but also this slower charging will provide a longer battery life.
Therefore their charger (and this is the reason why you must use their charger or any charger with the same mHa rating) is made to provide the optimal amount of charge rate (mHa) giving you the best battery life vs charge time.
In conclusion the Tabs hardware will limit the rate of charge through USB in order to:
a) Not overload the power on your USB, given that all this varies according to each system configuration (although it should not! but reality is.. it does)
and
b) In order to not improperly charge your tab, reducing your battery life.
I know the technical parts are vaguely/poorly explained but I work with Li-Po and other types so this is the simplest way to explain all this without causing too much confusion.
Hope this made sense
Cheers

tj1984 said:
Samsung have engineered it so you have to even use their mains charger. Car chargers and wall chargers have to be Samsung tab brand. Not sure but there is talk of AVUSB charge cable being released. Pretty sure this has already been covered.
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Not true.
Samsung is using standard chargers that are wired to identify themselves as high current chargers. A non Samsung charger / external battery will likely have the same wiring because this wiring is part of the usb-specification.
The Tab will even charge from your usb-port but only slowly and if you turn off the screen since usb-ports only have 500mA (the charger has 2A).
So all the Tab does is check for this high-power-wiring. If it detects it it shows you the charge-icon, if it doesn't it assumes a usb-connection to your computer and does not pretend to charge (even if it does).

Interesting! So then a generic car cig lighter accessory with a standard USB port on it should charge it as a high output conection, right?

I am able to charge my Tab using usb connection to my PC by turning the device off. Same with an Energizer XP8000 external battery. Leaving the device on will take a long time to charge or not at all if you are using it while charging.

Charging while in use

If I have the screen on while plugged in, my battery % continues to drop and the device itself feels kind of hot. Could I have a problem or is this normal?
My battery life has also not been so great.

perigee said:
If I have the screen on while plugged in, my battery % continues to drop and the device itself feels kind of hot. Could I have a problem or is this normal?
My battery life has also not been so great.
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Click to collapse
Are you using the OEM charger?

perigee said:
If I have the screen on while plugged in, my battery % continues to drop and the device itself feels kind of hot. Could I have a problem or is this normal?
My battery life has also not been so great.
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Mine doesn't it keeps going up, though I haven't tried playing games. It does depend on what you are doing with the device, if you are running applications that max out the processor it will possibly drop.
The GSII would drain while plugged in if the screen was on. You would see a noticeable drain while using GPS and Music and driving. The only way to make it work was to turn the screen off on the device, the GSIII has a better charging chip in it, and it isn't limited to 650maH (from what I can tell since it is charging when using GPS)

I noticed it while using a usb car cigarette adapter as well as a usb port on my laptop. the car adapter is a 2 amp charger capable of charging a tablet. I will see how it performs with the oem wall charger.
Sent from my SAMSUNG-SGH-I747 using XDA

Yeah I was charging my phone earlier using a car was adapter with the oem micro usb cable and they phone got very hot.
What do you guys think? Is this a cause for concern? Do I need to buy a manufacturer approved adapter?

Is it safe to leave the phone plugged in overnight? I usually charge the phone when I go to bed, but I've the this might damage some batteries.

hyped89 said:
Is it safe to leave the phone plugged in overnight? I usually charge the phone when I go to bed, but I've the this might damage some batteries.
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I'm curious about this myself....I'm leaning towards not leaving mine plugged all night. I 2 have done this in the past with other phones and can't be certain but maybe this is a rEason I had horrible batt life despite efforts to Better it. So I'm gonna stick with charging/topping off when I can. Gonna start just charging when I wake up while I'm getting ready for work. I did notice that when battery is completely charged a message comes up telling u so and to unplug. So I'm gonna follow directions haha.
Sent from my SAMSUNG-SGH-I747 using XDA

All modern smartphones have chips that control power, and cycle charging appropriately to not abuse the battery. Many phones monitor the temp of the battery and such to ensure a good and safe charge. You can leave it plugged in overnight just fine..

It definitely doesn't like 3rd party adapters. I'm hoping it will at least accept the tab adapter with samsung's cable so that I can charge it at work without buying a dozen chargers, but...
(One charger I used is understandable - turns out its only 300ma. Whoops! But using full 1A chargers wasn't helping either, it went up maybe 1% every 15 mins. The stock charger ran it up fast enough that it was charged from 70% in under an hour.)

I use SetCPU and have a setting to reduce the clock when it exceeds a temperate parameter. You could also set a max clock for when it is plugged into a USB (Computer/Car charger). That could help it stay cooler and charge faster while not plugged into the wall.
I charged from empty to full this morning when plugged into the wall in about 3 hours. I haven't tested on my computer yet.

I went through this when I first got my Evo 4G. I did not realize at the time that the 500mA charger I was using with my Blackberry Storm (horrible device) would not charge my Evo while doing anything power intensive (like using GPS) and I quickly drained it on a car trip.
I went on Amazon and bought a $20 Schosche iPad charger that claimed to provide 2.1A which should be plenty. On that charger the phone would charge while using GPS but very, very slowly.
After some more research I found that some chargers caused the phone to switch into "USB" charging mode and others would switch it to "AC" mode which would draw much more power and charge faster.
This is the charger I ended up with and it works great:
http://www.monoprice.com/products/p...=10826&cs_id=1082602&p_id=6766&seq=1&format=2
My Evo charges just as fast as it does on the OEM wall charger. I don't have my SIII yet (thanks Verizon for being the LAST in the US to ship them out...) so I can't yet say if this holds true for the SIII but I assume it will. At $1.22 it's not much of a gamble.

Charger Disappointment

Any one Disappointed with the charger they included with the Pure. The non removable cord just sucks and a poor choice in my opinion

I'm more disappointed at the size of the wall wart. They could have made more friendly to other power strip users.

razor237 said:
Any one Disappointed with the charger they included with the Pure. The non removable cord just sucks and a poor choice in my opinion
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Pretty sure they did that so you couldn't just stick any usb charging cord in their...it'd most likely fry it.

The disappointing part is the my other cords not working with Android auto. Luckily I have a nexus 6, and the cord with its charger works.
Sent from my P01MA using Tapatalk

brholt6 said:
Pretty sure they did that so you couldn't just stick any usb charging cord in their...it'd most likely fry it.
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I guess that could be a reason but highly doubt anything would be fried. Ive been using a nexus 6 turbo charger and before that i was using a note 4 charger to charge multiple android/apple devices without issue. This just limits what i can charge on a single charger now need a second lol

razor237 said:
I guess that could be a reason but highly doubt anything would be fried. Ive been using a nexus 6 turbo charger and before that i was using a note 4 charger to charge multiple android/apple devices without issue. This just limits what i can charge on a single charger now need a second lol
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If you plugged in a charging cord that can't handle the increased power it sure could fry the cord. I feel ya though...it would be nice if it were a USB cord.

I'm glad it looks different.... My son knows NOT to plug his HTC M7 into this charger.
I can see if this was someones first Android, the lack of a micro-USB for data would be frustrating, but I have about 5 of these in my desk drawer and throughout my house and office, so it doesn't bother me.

Also having a fixed cord means you don't pulg some 'slow' cable in and not get any benefits. Out my 8-10 micro USB cables, only 2-3 get a decent charge speed.

tele_jas said:
I'm glad it looks different.... My son knows NOT to plug his HTC M7 into this charger.
I can see if this was someones first Android, the lack of a micro-USB for data would be frustrating, but I have about 5 of these in my desk drawer and throughout my house and office, so it doesn't bother me.
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If a device that does not do Turbo Charging is connected, the charger should automatically adjust and charge it at regular speed. At least, that's what it is supposed to do. The Turbo Charger is supposed to be the single charger for all types.
Sent from my Nexus 10 using Tapatalk

Darnell_Chat_TN said:
If a device that does not do Turbo Charging is connected, the charger should automatically adjust and charge it at regular speed. At least, that's what it is supposed to do. The Turbo Charger is supposed to be the single charger for all types.
Sent from my Nexus 10 using Tapatalk
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Good, because I know I'll find his phone on that charger some day

I still have my galaxy s6 nexus charger that is a fast charging and it seems to work fine with turbo charging
Sent from my LG-H345 using XDA Free mobile app

I think the reason they made the cable fixed is because a lot of cheaper usb cables use very thin wire gauges. Since this charger puts out a lot of current at varying voltages, it's very possible for a thin cable to overheat easier and catch on fire. And my guess is, they didn't want to take any chances

How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
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I've got the same issue going on. My replacement from Amazon will be here Tuesday so I'll have time to mess with both and see if its the charger or what. Currently my turbocharging is hit or miss.

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
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I have this issue sometimes to. So if I need to know if im charging at turbo I use an app from the app store to see if states I'm turbo Charging or not. In the Charging screen it will say "normal or Turbo"
https://play.google.com/store/apps/details?id=com.gombosdev.ampere

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
Click to expand...
Click to collapse
You can use a USB voltage/current indicator device to see it directly. I use one that displays voltage and current simultaneously, it cost about $10 on Amazon.
The Qualcomm QC 2.0 (which Motorola terms "TurboPower) spec is 5, 9, 12, and 20 volts, with up to 2 amps plus at each voltage. The QC 2.0 chargers I've tested including the Motorola charger included with the XT1575, range up to 9V and about 2+ A at 9V, with the higher voltage/amperage when battery is discharged to a lower SoC.. Haven't seen 12V or 20V, I think those only come into play when battery is discharged to nearly zero SoC.
Agree the reason the included charger has cable attached may be to ensure adequate wire gage. Too-thin wire will increase voltage drop across cable thus lengthening charge time in higher power modes. But the design here uses higher voltage to keep current down around the same 2A max current of USB 2.0 chargers, so cable heat will not be a problem with any old USB cable.
I will attest to the benefit of QC 2.0. I thought it was a useless gimmick until I started using it. It does effectively compensate for mediocre battery capacity.

My "Turbo Charging" icon displays properly, but doesn't charge very quickly if connected to a cheap extension cord.
Plugged into the wall, the charging Stull doesn't impress me that much
Sent from my XT1575 using Tapatalk

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
Click to expand...
Click to collapse
It's defective. Call moto they will replace it for free. Just have to send copy of purchase receipt. Had the same issue.

The charge rate depends on how discharged the battery is when connected to charge.
More discharged (lower SoC, State of Charge) will drive a higher charge rate.
As to the difference between this Motorola TurboPower (aka Qualcomm Quick Charge 2.0), vs. other phones:
I've measured up to 1.4 amps at 5V nominal on other phones, that is about 9 watts charging power. That is max charge rate, with a very discharged battery. As the battery charges up closer to fully charged, the charge rate (power) is reduced. Total charging time from fully discharged to fully charged would be about 4-5 hours, give or take, for a typical cellphone battery.
For comparison, the QC 2.0 measurements I made with the MXPE: Up to 2.2 amps at 9V nominal with a phone battery discharged to about 40-50%. That works out to about 20 watts charging power. As with other Li-Ion battery charging systems, this also declines as the battery approaches fully charged. Total time to charge, from fully discharged to fully charged will be about 2-3 hours, give or take.
So the marketing claims about QC 2.0 are about right: A 75% improvement over conventional charging systems.
The biggest gains come when charging batteries discharged to lower SoC. If you are comparing charge rate/time of batteries discharged to only, say, 70-80%, you will not see as much of a difference with QC 2.0.
I'm not a QC 2.0 marketing shill, mind you. I pretty much ignored it, before buying the phone. But for this phone, QC 2.0 actually does a good job to compensate for the mediocre battery. I can run the battery down to 40-50%, put it on QC 2.0 charger in my car for my 30 minute commute, and it is charged to around 80+% when I arrive at my destination. There are a lot of QC 2.0 certified aftermarket chargers out there too, Qualcomm did a lot of work on the front end as part of bringing it to market. (Just make sure any AC charger is UL listed or equivalent, if you care about safety.
Caveats on cables: The cable does make a difference at higher charge rates. Thinner gage wire will impose a greater voltage drop at higher current, this will reduce power and thus increase charge time.
Typical USB cables are AWG 26-28. You can buy 20, 22, and 24 AWG USB cables. Some cables advertise heavier (22-24) gage wire for the power leads with standard (26-28) gage wire for the data leads. The aftermarket QC 2.0 AC chargers I bought listed their included cables as 20 gage.
Get the heavier gage if you want full QC 2.0 charging.

soufdallas said:
I still have my galaxy s6 nexus charger that is a fast charging and it seems to work fine with turbo charging
Sent from my LG-H345 using XDA Free mobile app
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Click to collapse
Just to check did you use S6 original charger ? And does it charge same with the turbo power charger provided by moto?
Sent from my Moto X Pure (2015) via Tapatalk

Mobile takes more time to charge?

My device is taking more time to get full charge. Is anyone experiencing the same.is there any way to improve the charging

My device is taking around 3 hrs to charge fully which is quite normal as given it has 5000 mAh battery and no fast charging. Only way to improve could be to switch off and then charge or not use phone while charging. Disabling cellular data and WiFi may also help.

$4b¥ said:
My device is taking more time to get full charge. Is anyone experiencing the same.is there any way to improve the charging
Click to expand...
Click to collapse
In my first time charge, i leave it charging when i sleep, but when i wake up my phone just have 82% battery, it takes 7 hour charge when i sleep, i realize that my mistake was not plug in perfectly the usb cable to charger adaptor, shame on me LOL
When it plug perfectly the charging time may 2,8 - 3 hours to 100%
*Sorry for my bad English*

youngmango said:
In my first time charge, i leave it charging when i sleep, but when i wake up my phone just have 82% battery, it takes 7 hour charge when i sleep, i realize that my mistake was not plug in perfectly the usb cable to charger adaptor, shame on me LOL
When it plug perfectly the charging time may 2,8 - 3 hours to 100%
*Sorry for my bad English*
Click to expand...
Click to collapse
Your English is fine

My phone gets full charge after 1.5 hours via galaxy s5 charger, and 2.5 hours via stock charger.

kotovss said:
My phone gets full charge after 1.5 hours via galaxy s5 charger, and 2.5 hours via stock charger.
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Click to collapse
Can u quote the ampere and wattage rating of the s5 charger

kickyvivi said:
Can u quote the ampere and wattage rating of the s5 charger
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Click to collapse
5.3v 2a 10.6w output, model : ep-ta10ewe

kotovss said:
My phone gets full charge after 1.5 hours via galaxy s5 charger, and 2.5 hours via stock charger.
Click to expand...
Click to collapse
kotovss said:
5.3v 2a 10.6w output, model : ep-ta10ewe
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Does it show "Charging Rapidly" state on the lock screen?
On my Anker triple ports QC2.0 charger, 2 of the normal ports 5V2.4A are able to "induce" my M2 phone to go into "Charging Rapidly" state. It only happens after plugging in for a few mins; if plug into the QC2.0 5V2A port it doesn't display "Charging Rapidly", just shows the normal "charging". Another of my QC3.0 charger 5V3A is also able to do this while other chargers I tried from 1.8A-2A range can't get this "Charging Rapidly" state. Is it possible that the M2 only support "fast charging" on 2.1A and above chargers?

Riona69 said:
Does it show "Charging Rapidly" state on the lock screen?
On my Anker triple ports QC2.0 charger, 2 of the normal ports 5V2.4A are able to "induce" my M2 phone to go into "Charging Rapidly" state. It only happens after plugging in for a few mins; if plug into the QC2.0 5V2A port it doesn't display "Charging Rapidly", just shows the normal "charging". Another of my QC3.0 charger 5V3A is also able to do this while other chargers I tried from 1.8A-2A range can't get this "Charging Rapidly" state. Is it possible that the M2 only support "fast charging" on 2.1A and above chargers?
Click to expand...
Click to collapse
No... Actually the speed of charging also depends on the current... If you current is 2A, then it automatically shows charging rapidly...
If you use any other charger with a lower ampere rating, then the phone will automatically detect that the current is low and it is charging slower...
---------- Post added at 05:40 AM ---------- Previous post was at 05:35 AM ----------
kotovss said:
5.3v 2a 10.6w output, model : ep-ta10ewe
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Click to collapse
Its just a suggestion... Dont use the S5 charger even if it charges faster... It voltage is 5.3v ... Voltage should always be 5v ... It will destroy your battery in the long term...

Can we use Oneplus 6 adapter of 5V 4A to charge the phone?

alwaysabeginner said:
Can we use Oneplus 6 adapter of 5V 4A to charge the phone?
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Yes ... You can... But your phone will probably heat up a lot.... And long exposure to higher temperatures might slowly degrade your battery...
Only use this charger in emergency cases...

Tyakrish said:
Yes ... You can... But your phone will probably heat up a lot.... And long exposure to higher temperatures might slowly degrade your battery...
Only use this charger in emergency cases...
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Click to collapse
Why do you say it will heat up a lot? Phones nowadays should have protection circuit to limit current, right? For my M2 I don't see any difference in using 5V2A or 5V3A adapter.

Riona69 said:
Why do you say it will heat up a lot? Phones nowadays should have protection circuit to limit current, right? For my M2 I don't see any difference in using 5V2A or 5V3A adapter.
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Click to collapse
I might be wrong... Of course they have protection circuits ... I have another phone Galaxy E5. It also should have a protection circuit or whatever...
Its charger is rated 5V 1.55A... But when I use a 5V 2A charger, the phone starts heating up...
Though it happens only while charge is less than 100...
Upon reaching 100% it cools down...

use a custom kernel

Yes XDA I experienced this problem
My pro m2 takes 6 hours to full charge what the ****

Dhairy said:
My device is taking around 3 hrs to charge fully which is quite normal as given it has 5000 mAh battery and no fast charging. Only way to improve could be to switch off and then charge or not use phone while charging. Disabling cellular data and WiFi may also help.
Click to expand...
Click to collapse
Mine is taking near about 4+ hours to charge fully

Riona69 said:
On my Anker triple ports QC2.0 charger, 2 of the normal ports 5V2.4A are able to "induce" my M2 phone to go into "Charging Rapidly" state. It only happens after plugging in for a few mins; if plug into the QC2.0 5V2A port it doesn't display "Charging Rapidly", just shows the normal "charging". Another of my QC3.0 charger 5V3A is also able to do this while other chargers I tried from 1.8A-2A range can't get this "Charging Rapidly" state. Is it possible that the M2 only support "fast charging" on 2.1A and above chargers?
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This is interesting - im going to try tonight

The condition has become worse after latest update i.e. 75mb may2019 Last week