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Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English
You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app
Evergreen74 said:
Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English
Click to expand...
Click to collapse
You must use a 5V AC USB Adapter and better no LESS than 1A
for Fast Charge.
AC Adapter I Use:
iPad AC Adapter 5V 2.1A at Work
PlayBook AC Adapter 5V 1.8A at Home 1
Original Nexus 4 AC 5V 1.2A at Home 2.
Our Nexus 4 will Draw around 0.8A when Batt lever at 0% - 80%,
then around 0.5A at 80%-95%, Final State 95%-100% will draw 0.2A roughly.
When 100%, Nexus 4 will use the AC power & the Current "A" show on phone
will like 2mA (0.002A) when idling.
** 1A = 1000mA
As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.
Sfkn2 said:
As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.
Click to expand...
Click to collapse
Why do you say not to go under 1.2A? Charging from a laptop is at .5A. I've been using a 1A charger since day one. Haven't experienced any issues with it.
Charging at a lower amperage shouldn't hurt anything, just charge slower. All you have to do is make sure it's a 5V charger. Amperage shouldn't matter but a lower amp charger will charge slower. As for a higher amp charger, the phone will only draw the amount of power it needs to charge so using 2A charger won't hurt anything either.
Also 2mA is 0.002A not 0.02 A
wilsonlam97 said:
You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Since the charger doesn't actually regulate the charging itself (the phone does this) it doesn't matter how many amps it can supply, could be 100 amps, no worries. As long as it is 5V, the phone will draw as many amps as it needs.
Since the supplied charger is 1.2A rated, it's fair to assume that the phone will never actually try to draw any more than that, so there will be no benefit in going higher.
Going for a lower current charger will likely extend the charge time.
I use a 2.1 amp daily without any issues.
Sent from my Nexus 4 using Tapatalk 2
Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!
Evergreen74 said:
Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!
Click to expand...
Click to collapse
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.
There may be one other thing to consider when selecting a third party charger. In the Nexus 7, the device looks for pins 2 & 3 (data) of the USB plug to be shorted in order for it to draw full current. If this pins are open (or have a load across them as is the case with iPhone/iPad chargers), the Nexus 7 will assume it is plugged into a computer and limit its draw to 500MA.
Not certain the Nexus 4 behaves the same way but would assume so.
setzer715 said:
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.
Click to expand...
Click to collapse
setzer715, thanks for the answer... I think I will be using the Xperia P charger at work...
Thanks all for your help!!
I want to make this case clear. According to my Charging log,
Here is some key point.
Nexus 4 Max Draw Rate at Fast Charge Mode is around 800-900mA,
even you use a Charger that rated at 1A (iPhone Tofu), 1.2A (Original),
1.8A (Playbook), 2.1A (iPad).
Fast Charge Mode must be with Charging Cable with 2&3 pin Shorted,
or the charger itself have the 2&3 pin already shorted.
Therefore, 1A is a Sweet spot for getting Charger & Charging Time for
Li-Po/Li-Ion/Ni-MH Batt charging.
If you use under 1A Charger, eg 700mA or 500mA, it will take much longer
to charge the batt but no harm as well. Just too slow only.
The stock charger that came with my phone sucks, I use one from my epic 4g touch (gs2)and it charges much better
DEVICE: Nexus 4
KERNEL: Franco r95
ROM: PROJECT Extinct Life Event
jlear3 said:
The stock charger that came with my phone sucks,
Click to expand...
Click to collapse
Why you say so...? What's wrong with it...?
Talon88 said:
Why you say so...? What's wrong with it...?
Click to expand...
Click to collapse
Left a phone on a charger all night with a long (10ft) cable and it couldn't even charge the phone over night. I know a 10ft cable will slow things down but my gs2 plug has no problem charging my phone. Search around and you'll find a few fail stories about the stock LG charger.
Sent from my Nexus 4 using Tapatalk 2
I have a question regarding chargers and the amps they put out.
While the stock wall charger is a 1amp charger, will a 2.1A charger damage the battery in my Nexus 4? I know 2.1 is usually for tablets, portable gaming systems, but does it damage our cell phone batteries, or just charge them faster?
thanks
mzeigler1 said:
I have a question regarding chargers and the amps they put out.
While the stock wall charger is a 1amp charger, will a 2.1A charger damage the battery in my Nexus 4? I know 2.1 is usually for tablets, portable gaming systems, but does it damage our cell phone batteries, or just charge them faster?
thanks
Click to expand...
Click to collapse
2.1A just means it _can_ output a maximum of 2.1A
But the Phone itself will "decide" how much current it draws for charging.
So no need to worry, it will not damage the battery. But it will very likely also not charge it faster.
I myself also used different chargers including the higher amp one from the Nexus 7.
so
You saw no difference in charging time compared to the 1 amp charger?
mzeigler1 said:
You saw no difference in charging time compared to the 1 amp charger?
Click to expand...
Click to collapse
I did not specifically think about it...I can test some other time right now my phone is fully charged.
But I guess the charger is adopted to the maximum charge current the phone can use.
I believe the phone can pull more than 1A if the charger is capable of delivering a higher amperage
Sent from my Nexus 4 using xda app-developers app
Thanks for the help guys! It worked.
Hiya,
I'm copying my original post over from the Z3 Compact forum as there should be a fair amount of similarities between the two models regarding battery charging.
Hiya,
I' hoping this is the right section to post this in.
I don't have my Z3C yet, but I've been searching for information on charging speed, charging current etc. - and there is barely anything to be found. What seems to be consent: A full charge (0-100%) takes about three hours. But then, some people say an almost full charge (0-90%) takes much less, as charging current is greatly reduced for the last 10% to reduce stress on the battery. Sony itself also claims that a small charge (something like 0-10%) should be quite fast as well.
Then there's some speculation about QuickCharge 2.0 being used or not used, that you could use a Motorola 2.0A charger to charge it faster than with the provided 1.5A Sony charger etc., which also brings up the question which resistor values on the D+ and D- wires are necessary to toggle different charging currents. (Or I might be stupid and there's a standard for that by now, which is the same for all Qualcomm devices.)
To cut it short: I'd request those who have a Z3C to post some comments about their charging times, and at best even their charging currents. I used an app called BatteryMonitor on my Desire HD, I'm sure there's others around now that give the same information. If someone could try out different chargers and record charging current over time, maybe even with a pretty graph, it'd surely help all future discussions about chargers, docks, modifications, DIY charging issues etc.
Click to expand...
Click to collapse
So, as the same goes for the Z3: If someone can record their charging times, charging current and charger used: Go ahead and post it. Bonus points for taking a look at magnetic charging.
dragonfet said:
Hiya,
I'm copying my original post over from the Z3 Compact forum as there should be a fair amount of similarities between the two models regarding battery charging.
So, as the same goes for the Z3: If someone can record their charging times, charging current and charger used: Go ahead and post it. Bonus points for taking a look at magnetic charging.
Click to expand...
Click to collapse
A recent tear down confirms the Qualcomm chip for Quick Charge 2.0 support, so what we need now is for someone to get a compatible PSU that can 'talk' to the phone and then supply more power. That should see a huge improvement in charge time.
I am just trying to find a source for a compatible charger. So far I've only seen the Motorola Turbo Charger in the USA, and I'd be wary of buying anything made by a no-name brand at this point.
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.
jonmorris said:
A recent tear down confirms the Qualcomm chip for Quick Charge 2.0 support, so what we need now is for someone to get a compatible PSU that can 'talk' to the phone and then supply more power. That should see a huge improvement in charge time.
I am just trying to find a source for a compatible charger. So far I've only seen the Motorola Turbo Charger in the USA, and I'd be wary of buying anything made by a no-name brand at this point.
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.
Click to expand...
Click to collapse
I have read excellent reviews for the Blackberry Premium Charger (the one with the yellow tip), super cheap on Amazon right now. Recommended by Android Central and others for its 2A charging capability. I have used it in the past from my HTC One X days and have re ordered for my Z3. Honestly, my Z3 is charging more than fast enough with the OEM supplied charger, which may be less powerful but more optimised than another OEM's charger. The one I'd trust most if I was forced to use one would be the above model of the BB charger.
jonmorris said:
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.
Click to expand...
Click to collapse
more power can either be achieved through more voltage (that could potentially be harmful if the hardware is not compatible) or more current. More current is 100% save as the charging circuit just takes what it needs, independent of the (more potent) capabilities of the charger.
As Oppo showed with its find 7 just raising the current is a viable option which works. This is also a Snapdragon 801 device.
With the 1.5A original charger and cable, using Battery Monitor Widget shows the charging rate at around 900mA to 1000mA.
So I guess Z3 is restricting to max 1A charging?
jonmorris said:
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.
Click to expand...
Click to collapse
Would it be possible that the PSU simply always limits the power output? For example, the phone might try to draw 1.5A, but the PSU doesn't support it and limits at 1.0A. Then magnetic charging could work with 1.5A or even 2.0A without the need for communication over the D+ / D- pins. (And attaching the magnetic port with a USB adapter to a PC or Laptop might cause the USB Port to shut down and trigger an overcurrent warning.)
AKK03 said:
With the 1.5A original charger and cable, using Battery Monitor Widget shows the charging rate at around 900mA to 1000mA.
So I guess Z3 is restricting to max 1A charging?
Click to expand...
Click to collapse
That would make sense. Though wonder where the extra 500 mA are going, it surely can't be the phone's standby. And given a typical maximum charging current of 1.0C (C = battery capacity), it would translate into 3.1A of charging current and therefore a 3.5A power supply.
Is this current constant from 1% to about 65%?
AKK03 said:
With the 1.5A original charger and cable, using Battery Monitor Widget shows the charging rate at around 900mA to 1000mA.
So I guess Z3 is restricting to max 1A charging?
Click to expand...
Click to collapse
If there are restrictions they are most likely within the Kernel and we may be able to change them in the future with custom Kernels
dragonfet said:
That would make sense. Though wonder where the extra 500 mA are going, it surely can't be the phone's standby. And given a typical maximum charging current of 1.0C (C = battery capacity), it would translate into 3.1A of charging current and therefore a 3.5A power supply.
Is this current constant from 1% to about 65%?
Click to expand...
Click to collapse
There is some fluctuation, but is roughly around 1A.
I have test 2 different charger
from "Battery Monitor Widget Pro" logs
with EP880 (1.5A max)
show ...................... 1.1A max
with 2 Amp charger
show .....................1.5A max
maxx228 said:
I have test 2 different charger
from "Battery Monitor Widget Pro" logs
with EP880 (1.5A max)
show ...................... 1.1A max
with 2 Amp charger
show .....................1.5A max
Click to expand...
Click to collapse
Thanks for the results. I have my Z3 by now and recorded some as well.
From 0 to 68%, it charges with 1000-1100 mA, then it goes into CV (constant voltage) mode and stays there until 95%. Then the curent drops slightly. The rest of the charging curve is not usable, as it was the first full charge my handset had. And the last for now, as I have to send it back due to a gap in the frame and microphone issues.
I'll post a complete curve when I have the new one and did a few cycles. What's clear for now:
1. Charging current with the stock charger is around 1.1 A max.
2. The phone charges up to 95% with 0.5% per minute. (Stock Charger)
3. It drops to 0.125% between 95% und 100%, likely to put less strain on the battery.
It's nice to see that there's appearantly support for higher charging currents. Though we should keep in mind that a higher current also means more stress for the battery, especailly when the phone is used while charging (higher battery temperature as the CPU also adds heat).
my Z3 came with the charging dock dk48.. it is rated at 1.8a, charging is fast
I can't speak to the Z3 (yet), but my Z1s charges nearly twice as fast on the magnetic charging dock as it does through the USB connection. As a result, I can leave my screen on at full brightness while on the dock and still charge. I would *expect* similar behaviour from the Z3.
Original charger: about 1.0A - 1.1A. Result: 3h 50p - 4h for fully charged.
Magnetic charging dock or cable: 1.5-1.6A. Spend only 2h 45p
I'm tesing Xiaomi MI Power Banki 10400mAh. First test: 1.6A, much faster than original charger. A bit surprise!
http://www.mi.com/sg/mipowerbank/
Zanr Zij said:
Original charger: about 1.0A - 1.1A. Result: 3h 50p - 4h for fully charged.
Magnetic charging dock or cable: 1.5-1.6A. Spend only 2h 45p
I'm tesing Xiaomi MI Power Banki 10400mAh. First test: 1.6A, much faster than original charger. A bit surprise!
http://www.mi.com/sg/mipowerbank/
Click to expand...
Click to collapse
The original charger is rated 1.5A, actual charging on Z3 is 1.0A.
Xiaomi is rated 2.1A, so I guess is reasonable to expect 1.5A actual charging from it.
For your magnetic charging dock or cable, are you using the original charger?
With the original charger, I'm getting the same result with or without dock.
Zanr Zij said:
Original charger: about 1.0A - 1.1A. Result: 3h 50p - 4h for fully charged.
Magnetic charging dock or cable: 1.5-1.6A. Spend only 2h 45p
I'm tesing Xiaomi MI Power Banki 10400mAh. First test: 1.6A, much faster than original charger. A bit surprise!
http://www.mi.com/sg/mipowerbank/
Click to expand...
Click to collapse
where did you get the magnetic charging cable?
AKK03 said:
The original charger is rated 1.5A, actual charging on Z3 is 1.0A.
Xiaomi is rated 2.1A, so I guess is reasonable to expect 1.5A actual charging from it.
For your magnetic charging dock or cable, are you using the original charger?
With the original charger, I'm getting the same result with or without dock.
Click to expand...
Click to collapse
With Mi Power Bank, I used micro USB cable, not magnetic.
I'm using Samsung Note 3 2.0A charger. Through micro USB port, I got lower current, about 1.0-1.2A but with magnetic cable 1.5-1.6A.
---------- Post added at 11:31 AM ---------- Previous post was at 11:30 AM ----------
Shudder123 said:
where did you get the magnetic charging cable?
Click to expand...
Click to collapse
Included in my Z3 retail box
Zanr Zij said:
With Mi Power Bank, I used micro USB cable, not magnetic.
I'm using Samsung Note 3 2.0A charger. Through micro USB port, I got lower current, about 1.0-1.2A but with magnetic cable 1.5-1.6A.
---------- Post added at 11:31 AM ---------- Previous post was at 11:30 AM ----------
Included in my Z3 retail box
Click to expand...
Click to collapse
you mean the USB cable?
Shudder123 said:
you mean the USB cable?
Click to expand...
Click to collapse
My Z3 Dual retail box has 2 cables: usb and magnetic
Zanr Zij said:
My Z3 Dual retail box has 2 cables: usb and magnetic
Click to expand...
Click to collapse
where did you get yours from? mine only came with a USB cable
I have a z3 dual .. I did not notice the second cable in the box. I have to check again
In a review site someone claiming confidently that the G4P does support turbo charging despite no mention of this in specs. Does anyone have the G4P and a turbo charger can do a test?
nigelhealy said:
...despite no mention of this in specs....
Click to expand...
Click to collapse
Well, I don't think Motorola really advertised "Turbo" charging for G4 Play.
They advertised something else. Here's what it says on their site:
Moto G Play works with the 10W rapid charger (charger in-box), which gives you 5 hours of battery life in just 15 minutes of charging.
Click to expand...
Click to collapse
Source: http://www.motorola.in/products/moto-g-play#battery
carefully said:
Well, I don't think Motorola really advertised "Turbo" charging for G4 Play.
They advertised something else. Here's what it says on their site:
Source: http://www.motorola.in/products/moto-g-play#battery
Click to expand...
Click to collapse
So the charger supplied says 5V and 0.5A which doesn't look like a fast charger.
nigelhealy said:
So the charger supplied says 5V and 0.5A which doesn't look like a fast charger.
Click to expand...
Click to collapse
My supplied charger clearly says OUTPUT: 5.2V===2.0A
Exhibit A is attached
It does not support quickcharger, that works with 9v and 12v i already tried, but the supplied charger charges at 2.0 A. which is fast.
carefully said:
My supplied charger clearly says OUTPUT: 5.2V===2.0A
Exhibit A is attached
Click to expand...
Click to collapse
I am in the USA and bought the USA version XT1607.
The charger looks different it says 5V 0.5A.
nigelhealy said:
I am in the USA and bought the USA version XT1607.
The charger looks different it says 5V 0.5A.
Click to expand...
Click to collapse
Same here, both the Amazon and the non-Amazon version I bought had the 550mAh chargers.
hooverbw said:
Same here, both the Amazon and the non-Amazon version I bought had the 550mAh chargers.
Click to expand...
Click to collapse
The fact they package with a low spec charger in a $150 box is not a concern. I own dual and quad chargers I carry for phone tablet BT etc.
The question is a specific charger able to charge faster? I looked at the one supplied and it seemed to imply a 5V input then as much Amp as phone can take, which is usually about 1-1.5A til 85%.
Turbo, is I think like QC, it increases the voltage at low battery charge, such a charger would show say 12V or 9V output.
Is there any good charging app to watch what the phone is doing? I have iSmart, QC 2.0 and QC 3.0 devices I can test on.
hooverbw said:
Is there any good charging app to watch what the phone is doing? I have iSmart, QC 2.0 and QC 3.0 devices I can test on.
Click to expand...
Click to collapse
The way I find best is to not use the phone and use a stopwatch and measure at 15m intervals.
It does take days to be ready with a low charge condition.
App I have used is Ampere but I find it unreliable as the act of using the phone means heat throttling down the charging speed, if you don't use the phone then Ampere sleeps and doesn't monitor.
From what I understand, it does support it but you have to buy an additional charger.
It definitely does some kind of fast charging because my Anker Powercore+ 10,050mAh power block charges it incredibly fast. I don't know what other charging methods the Anker does beyond qc2.0 since I have had the Anker less than 12 hours.
Sent from my Moto G Play using XDA Labs
If this behaves like osprey (which I expect - I haven't yet examined the kernel), the hardware doesn't support the Qualcomm high voltage quick charging, but it does support regular charging up to 800 mA. The weak 550 mA charger bundled with the North American variants will not make the most of it, but a 1A charger or better should get full charging performance.
squid2 said:
...but it does support regular charging up to 800 mA...
Click to expand...
Click to collapse
So does this mean the 2.0 A bundled chargers are bottlenecked, like they support 2.0 A and the phone supports only till 800 mA...am I thinking correct?
My XT1607 US unlocked retail version came with a 5V 550mA labeled charge plug. I used a cable and power plug from another device that rated at 5.2V and 1.35A and it drew about 1.4A from it. Then I dug out another USB adapter rated 5.3V, 2A . It consumed 1.78A and it was 80% charged at the time. That would make for some much faster charging than the original plug. Wouldn't matter much if you just plug it in overnight to charge.
Anyone confirm if the it supports QC 2.0? Only thing wrong e phone is slow charge from supplied.
Sent from my Moto G Play using Tapatalk
I have used the turbo charger supplied with Moto G3 Turbo and it charges much faster than the one supplied in box. So yes it supports turbocharging but you need to get the charger elsewhere.
MaanasDwivedi said:
I have used the turbo charger supplied with Moto G3 Turbo and it charges much faster than the one supplied in box. So yes it supports turbocharging but you need to get the charger elsewhere.
Click to expand...
Click to collapse
Logic fail. The supplied charge is feeble like 0.5A so anything like 1A or 2A is better.
That does NOT mean turbo is supported.
When I plug my G4 Play into my Anker 4 port power supply and then into a kilowatt meter, it draws 10 watts. If we work it backwards, that's 5v and 2 amps (however, need to account for line loss, transformer loss and other losses). A watt is a watt, doesn't matter what the voltage or amperage is, as W = V x A.
This phone charges much quicker than my old Moto G second gen, which would take close to 2 hours to fully recharge. I have had this phone recharge in as little as an hour from around 30%. It's a shame that the SD 410 chip supports QC 2.0 but Motorola didn't enable it. It seems to have QC 1.0 (which is the 10 watt, 5v @ 2amp rating).
brian10161 said:
When I plug my G4 Play into my Anker 4 port power supply and then into a kilowatt meter, it draws 10 watts. If we work it backwards, that's 5v and 2 amps (however, need to account for line loss, transformer loss and other losses). A watt is a watt, doesn't matter what the voltage or amperage is, as W = V x A.
This phone charges much quicker than my old Moto G second gen, which would take close to 2 hours to fully recharge. I have had this phone recharge in as little as an hour from around 30%. It's a shame that the SD 410 chip supports QC 2.0 but Motorola didn't enable it. It seems to have QC 1.0 (which is the 10 watt, 5v @ 2amp rating).
Click to expand...
Click to collapse
Regular USB is 2A 5V 10W.
https://en.m.wikipedia.org/wiki/USB
Standard USB 2.0 is 500mA
USB 3.0 is 900mA
There is a new subset standard called USB power delivery, it's used for newer devices.
Quick charge 1.0 was 2 amp at 5v.
There's a little more info here. https://www.easyacc.com/media-center/quick-charge-3-0-vs-2-0-vs-1-0/
These phones charging at 2 amps is technically quick charge, whether it's the 1.0 revision or not is really down to licensing and stuff. They don't charge at 2.0 speeds unfortunately. Even though the chipset supports it.
I'm aware to take advantage of "DASH" charging (5V 4A), you need a DASH charger with the circuitry, and a DASH capable phone.
1. Can I theoretically use any USB C to USB A cable with my OP5 and DASH charger, or will the phone limit the current? I understand cables may not support 4A of current, but I want to know will the charger and/or phone stop it from pulling so much current? What if I buy a high-quality cable off Monoprice? Or does the cable have to be "DASH Certified"?
2. If I were to plug in another phone into the DASH Charger and official cable, like say a Nexus 5X, how will the Nexus charge? The Nexus usually pulls 3A from a 5V charger. Can the Nexus still pull 3A from the DASH charger, or will it be limited to 1 or 2A?
3. If I were to plug the OP5 into another, non-DASH charger, what's the maximum voltage/amps it can pull? For example, the Nexus 5X charger is rated at 5V 3A. Would the OP5 be able to pull the 3A, or does it need some special circuitry? If so, what would it draw? 2A or less?
Last question: From what I understand if I use a laptop USB C charger, things should work okay- especially if the power brick shows it suppors 5V, 9V, and 12V. I assume the device will tell it to use the 5V line and draw whatever current it can. But what if I have a USB C charger that only says 12V on it? Or say 19V? Am I taking a gamble then? Let's assume this charger that is only rated at a high voltage is not a "shady" charger, and they followed the USB C spec properly. Should I be okay?
Thanks.
Any input or insight on these questions? I've read a lot about DASH charging, but looking for clarity on the above questions.
1. You can use any cable with your dash charger but your phone won't take advantage of the dash charging speeds and instead will charge at around 1.5 to 1.7 amps. So far I haven't seen a single cable no matter the brand working at dash charging speeds so the only cable I've seen working with dash charging are the official 1+ ones.
2. I don't have my Nexus 6p anymore to test this out but theoretically a 3 amp capable phone could draw the necessary amperage from the dash charger since the dash charger is capable of up to 4A. However, I'm pretty sure the phone will charge at the traditional 1 to 2 amps.
3. Amperage, as opposed to Voltage, is drawn by the devices themselves meaning a 5V 3A charger will always push 5 volts and can give up to 3 amps of power to a connected device. The amperage may be below or equal to the capacity of the charger, but never more. Modern batteries and phones have special circuitry embedded in them to protect them from over voltage or excess current and the OP5 is no different.
When connected to a charger, a phone will usually try to identify the charger it's being connected to, if if fails to recognize its capacity, the phone will reduce the amount of current to a safe amount that's below the charger's capacity. Seeing as there are many different chargers, like 2A, 2.4, 3A, 4A, phones usually fall back to a safe charging current that's within the lowest capacity of the most common chargers so even with a 3 amp charger, the OP5 will probably charge at between 1 and 2 amps even if the charger has a 3 amp capacity.
4. Computer USB ports are fine since they have a 5 Volt power bus and any extra current needed is passed through the BMC configuration line and/or the VBUS line only when requested by the connected device. As for using a higher voltage, since voltage is pushed to the device, is not a good idea to use a charger rated with a higher voltage that of the device being charged because you run the risk of overloading the circuits. Phone chargers used in cars usually operate at 12 Volts but they have DC/DC converters and resistors to reduce the voltage to the 5 volts required for phones and tablets. I'm not aware of AC chargers being able to operate with different voltage regulators.
1, No，you can only use official cables, but, I'v tested that oppo vooc cable+micro2typec adapter, can Also dash charge at 5v 4a,Turst me ,the charge chip is in USB C
In case nobody else does, I'll answer question 2 on Friday, when I get to the office. I'll be able to try it with several USB-C capable devices.
Hope I won't forget the dash charger home.
So, as promised...
Today I tried the following devices:
- Nexus 6P, LG 5, OnePlus 5
- Nexus 6 original charger (model SSW-268EU), OnePlus 5 original charger
- LG G5 original cable, OnePlus 5 original cable
I used Ampere to measure the values. All three phones were at around 50% charging state. Temperature of the phones was around 30 °C (+/- 2 °C). Measurement time was around 1 minute.
The results represent the maximum stable values (shown for at least 5-10 seconds). Where there was a variation, it meant that the reading varied slowly between those two. One value means that the reading stayed fixed at that value. Amperage readings are expressed in Amperes. No approximation made and any variation of less than 0.1A was not taken into consideration. (i.e. 1.4A = 1400 ~ 1500 mA).
The tests are not scientifically rigorous and should be taken as such. These results are purely informative.
On the horizontal are the charger&cable combinations. On the vertical,the phones.
Moto & G5
N6P 1.2A
G5 1A
1+5 1.3-1.5A
Moto & 1+5
N6P 1.2A
G5 0.8-1A
1+5 1.3-1.4A
1+5 & 1+5
N6P 1.2A
G5 1A
1+5 3.3-3.4 A
1+5 & G5
N6P 1.1-1.2A
G5 1A
1+5 1.3A
If I forgot any details, don't hesitate to ask.
Thanks for the information! Your tests are exactly what I was looking for.
Dash Charger Stop charging at 83%
Is there anyone facing dash charger stop to charging at 83%? But with another charger can continue charging until 100%....
On the topic, there is a QC to VOOC adapter on TaoPao that someone tested on the OnePlus subreddit and it apparently works. I wonder how exactly it works, though. Apparently it's capable of getting 3A from a standard USB-C and QC 3.0 wall wart.