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charging galaxy s4 i9500 with 2.1A and not 2(stock)

http://www.ebay.com/itm/3-1A-Dual-U...S_Cell_Phone_PDA_Chargers&hash=item565a917530
hello
My stock charger is us for galaxy s4 (samsung regular charger)
and then I found this (link above) with 2.1A
is it matter charging via 2.1A and not 2A? what is the different? it will charge faster/slower?
thanks

In Stock kernel there is current limit 1.9A. So everything above it, will be the same as 1.9A.
In reality, you will find that even 2.1A charger doesn't supply even 1.9A. Chinese charges definitely don't supply current thay claim. And beware of them - you may fry your device by such cheap charger.
Also, it heavily depends on USB cable as well. It has to be very short and very thick.

I have a Mediabridge car adapter that has a 2.1 amp charger on it. When I charge my S4 with it it barely charges faster than the 1 amp charger does. I think it charges at either 1.3 or 1.7 amps, sorry can't remember exactly.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

jev3gs said:
I have a Mediabridge car adapter that has a 2.1 amp charger on it. When I charge my S4 with it it barely charges faster than the 1 amp charger does. I think it charges at either 1.3 or 1.7 amps, sorry can't remember exactly.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
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How do you measure the exact amperage that it charges at?

Badelhas said:
How do you measure the exact amperage that it charges at?
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I don't have the equipment to measure it exactly. So what I did was charge my phone from 50% for 40 minutes on my stock Samsung wall charger and then recorder the percentage it increased. I then took that number and assumed it was charging at 2 amps and used it as a baseline. Then I did the same test with my car adapter and recorded the results. The I figured out the percentage difference and came up with me estimates. I just don't have the data in front of me anymore but I remembered it being somewhere between 1.3 or 1.7.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

The stock charger is fast at charging this phone. On my s3 it took forever . I would stick with stock
Sent from my SPH-L720 using XDA Premium 4 mobile app

ok thanks
more people?

ok thanks
more people?

Chargers, power supplies, etc, don't "decide" the amps that go to a device - the device "draws" a certain amount. Just because a lamp is plugged into a 20amp circuit in your home doesn't mean 20 amps are going to be shoved through the bulb.
So if, as sorg says, the phone is only going to "ask" for 1.9a, you could plug it into a 5 amp charger and it would make no difference.

darixtorento said:
ok thanks
more people?
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You already got your answer above.
No, your phone will NEVER charge faster than 1900 until a developer comes along and figures out how to hack the system to allow this. And it would be a potentiallly STUPID idea to charge faster than Samsung has deemed safe.
Go here to find out how to test your charging rate:
http://forum.xda-developers.com/showthread.php?p=46156385#post46156385

No Charger?

What charger should I use? It comes with the wire but no adapter. What voltage should the adapter be as I do not want to ruin the battery of the Moto G.
I have a Samsung Galaxy S2 and HTC One X charger.

Any USB charger will be fine, they're all 5v. The cheaper ones will have a low mAh though.
Both your Samsung and HTC ones are suitable.

No charger? thats a bummer..
it means that charging time would be varied depending of the source. Not a wise move here by Motorola since people might buy cheap charger and ruined the user experience. Especially when they're targeting 1st time smartphone consumer in less develop country
hmm..

It's going to get more and more common as the world is flooded with USB chargers.

Well not really true... Here in germany every shop adds the adapter to the package themselves. Most of them added a 1000mA one, because it doesnt ruin the battery that fast. You can see that in pretty much every unboxing video. But in fact we e.g already got like 5-6 chargers in our households, so what...
Sent from my LG-P760 using xda app-developers app

As it would be my first smartphone, I'm looking into the wall plugs. I've found one in my local shop for ~10 euros. It's from Philips, with 5V/10,5W/2,1A and has two USB sockets (that's why it's 2 amps).
My question is, as I've no experience with smartphones, how long would it take to charge from 0 to 100?

With that charger it would take roughly 2 hours to charge your device with 2075 mAh battery.

The Brazilian 16gb dual chip edition comes with a charger.

duhprest said:
What charger should I use? It comes with the wire but no adapter. What voltage should the adapter be as I do not want to ruin the battery of the Moto G.
I have a Samsung Galaxy S2 and HTC One X charger.
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LOL... I was surprised as well, when got the box (a tiny package similar to iPhone) and found only phone and USB cable inside.
But don't worry, any charger with 1A will do the job, so your chargers from S2/HOX will be OK.
---------- Post added at 04:47 PM ---------- Previous post was at 04:41 PM ----------
N00BY0815 said:
Well not really true... Here in germany every shop adds the adapter to the package themselves. Most of them added a 1000mA one, because it doesnt ruin the battery that fast. You can see that in pretty much every unboxing video. But in fact we e.g already got like 5-6 chargers in our households, so what...
Sent from my LG-P760 using xda app-developers app
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That's nice attitude towards customers...
I am using the old HTC charger (1A),which came with HTC Diamond (has a nice glowing HTC logo ) and its OK. It charges battery fully within 100 minutes when phone is OFF.
Will try also 400mA (Alcatel) to see what's the difference.
I use only branded chargers, as had issues with some cheap aftermarket chargers in the past.

N00BY0815 said:
Most of them added a 1000mA one, because it doesnt ruin the battery that fast.
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That's just silly, PM chips actually limit your charging current. So 2000mA charger won't do you any harm and would come in handy while charging pads.

levizx said:
That's just silly, PM chips actually limit your charging current. So 2000mA charger won't do you any harm and would come handy while charging pads.
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It may depends on phone make/model.
I've used few times 2A charger from Samsung Note 2 and phone/battery become hot and battery didn't lasted long... Also during charge it had hissing sound, so back to 1A chargers and all OK.
I think lower output does charge battery longer, but battery last longer as well...
Will get back when charge with 400mA charger (probably on Tuesday or Wednesday )

aspot72 said:
It may depends on phone make/model.
I've used few times 2A charger from Samsung Note 2 and phone/battery become hot and battery didn't lasted long... Also during charge it had hissing sound, so back to 1A chargers and all OK.
I think lower output does charge battery longer, but battery last longer as well...
Will get back when charge with 400mA charger (probably on Tuesday or Wednesday )
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I guess that could happen with bad pm chips. But I've never seen this behavier on any Moto phones so far.

levizx said:
I guess that could happen with bad pm chips. But I've never seen this behavier on any Moto phones so far.
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I can't comment on this as my last Motorola was the StarTAC 130 some 15 years ago

aspot72 said:
I can't comment on this as my last Motorola was the StarTAC 130 some 15 years ago
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I think with pretty much with every Snapdragon chip you get the bundled PM chip, and the last bad experience I had with a Snapdragon was with 8225/q and that was just inaccurate battery reading. I would think anything newer would handle 2a charger just fine.
Sent from my XT905 using Tapatalk

levizx said:
I think with pretty much with every Snapdragon chip you get the bundled PM chip, and the last bad experience I had with a Snapdragon was with 8225/q and that was just inaccurate battery reading. I would think anything newer would handle 2a charger just fine.
Sent from my XT905 using Tapatalk
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Well, thanks to MotoG's superb battery back up I don't mind what charger and how long does it takes.Now I need to charge only twice a week, unlike with my previous devices, as they needed every 2nd day. Sticking with my favorite HTC 1A charger

Long-term reduction in battery capacity using high amperage charger
levizx said:
That's just silly, PM chips actually limit your charging current. So 2000mA charger won't do you any harm and would come in handy while charging pads.
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Click to collapse
I only partly agree with you here. Although the Moto G will restrict charging to a maximum of 1500mA, so using a 2A charger will not cause any direct damage to the phone circuitry or immediate damage to the battery; using a higher amperage, fast 2A charger to charge at 1500mA over time will likely cause more reduction in battery capacity. See this XDA post for my logic in coming to this conclusion:
http://forum.xda-developers.com/showthread.php?t=2564158
UPDATE and CORRECTION:
I have more authoritative information directly from Battery University that changes the conclusion I draw above based on my effort to extrapolate from the Battery University website article.
The extrapolation I did in the post listed above was based on the additional loss of battery capacity cited when going from a 1C to 2C charging rate. But according to direct communication from Battery University, when charging at a rate below .7C there should be no measurable improvement to capacity by using slower charging rates. Charging above .7C would still be expected to add more stress to Lithium Ion Polymer batteries and likely add to long-term reduction of capacity.
So, what this means for the Moto G and Nexus 5 is that there should be no measurable difference between charging with 2A, 1.2A, 1A, or 850mA chargers as far as effect on long-term battery capacity goes. Both the Moto G and Nexus 5 are supposed to automatically restrict the charge rate at 1500mA even when using a faster charger, which is just at or below .7C for both phones. So, as long as the charger dependably keeps to 5V, a higher amperage 2A charger will be faster but pose no problem to long-term capacity.

[Q] sm-p905 Charging with non genuine charger

Gday All,
I realise that this topic has been mentioned in a few threads, but from what I could find, there is no definiteve fix.
Is there a way to disable this so that a non-genuine charger will work once the screen turns off, or if I was to root the device, is there then a way to do it.
Please dont flame me, I'm a total newb to android, and I dont mind admitting that.
Bit dissapointed that Samsung has sunk to this.
TIA!

Not sure what issues you are having but I have been using a few different chargers without issue. Which exact charging method are you trying to use (cable type, charger type, charger rated output voltage and amperage)?
Sent from my SM-P900 using Tapatalk

The problem isn't that the charger is 3rd party.
The problem is that the device requires a 5.1V 2A charger or higher.
Anything lower than that is simply not powerful enough. You can find these specs in small lettering on the charger. Most cheap 3rd party launchers are 5V 1A.

CrazyManR32 said:
Gday All,
I realise that this topic has been mentioned in a few threads, but from what I could find, there is no definiteve fix.
Is there a way to disable this so that a non-genuine charger will work once the screen turns off, or if I was to root the device, is there then a way to do it.
Please dont flame me, I'm a total newb to android, and I dont mind admitting that.
Bit dissapointed that Samsung has sunk to this.
TIA!
Click to expand...
Click to collapse
I was one of the ones having problems with it needing to have the screen on to charge. It was a problem with the charger (yes, it was marked as a high amperage charger), changed to a different one (Anker 40W 5 port) and it's working fine.

ericbergan said:
I was one of the ones having problems with it needing to have the screen on to charge. It was a problem with the charger (yes, it was marked as a high amperage charger), changed to a different one (Anker 40W 5 port) and it's working fine.
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Huge second on the Anker. I love that charger by the way. With various devices I would get irritated with some refusing to charge on certain chargers (my BlackBerry Bold in particular). I've since switched to the Anker 5 port 40 Watt and no longer worry about which cable I'm reaching for. Every device gets the power it needs with no fuss.

muzzy996 said:
Not sure what issues you are having but I have been using a few different chargers without issue. Which exact charging method are you trying to use (cable type, charger type, charger rated output voltage and amperage)?
Sent from my SM-P900 using Tapatalk
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Initially i was using a belkin 2 port, 2.1amp per port charger, which would start charging but stop once the screen was off.
ShadowLea said:
The problem isn't that the charger is 3rd party.
The problem is that the device requires a 5.1V 2A charger or higher.
Anything lower than that is simply not powerful enough. You can find these specs in small lettering on the charger. Most cheap 3rd party launchers are 5V 1A.
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This seems logical, but it does work when i use the genuine charger from my sgs3 which is a 5vdc 1a charger. Takes all night to charge, but charges non the less.
ericbergan said:
I was one of the ones having problems with it needing to have the screen on to charge. It was a problem with the charger (yes, it was marked as a high amperage charger), changed to a different one (Anker 40W 5 port) and it's working fine.
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Thanks for the info mate, ill see if i can get hold of one of these in australia, that being said, it appears that these are also 5v rather then the 5.3?

CrazyManR32 said:
This seems logical, but it does work when i use the genuine charger from my sgs3 which is a 5vdc 1a charger. Takes all night to charge, but charges non the less.
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Click to collapse
That's because the retention rate of the S3's charger is higher than that of a generic cheap 3rd party one. Where the S3 charger actually delivers 0.8-1A, the cheaper ones usually average around 0.5A.
This is why charging over a usb 2.0 port without any power boosts also (usually, there have been some exceptions) doesn't work.
I usually charge mine with my Note 3 or S5 charger, as the three are all the same charger.

Samsung Fast adaptive CAR charger and M9?

I wonder if the Samsung Car charger Fast Adaptive which is the name sammy gave for Quick Charging 2.0 is compatible with the M9?
The wall charger version work from what I heard but dunno about the Car one

Maybe the output specs could shed some light on interoperability. I'd guess that between the differences of Samsung's Exnos processor and Qualcomm's Snapdragon there isn't much collaboration to build a common fast charging standard. Too bad, that.

computerslayer said:
Maybe the output specs could shed some light on interoperability. I'd guess that between the differences of Samsung's Exnos processor and Qualcomm's Snapdragon there isn't much collaboration to build a common fast charging standard. Too bad, that.
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It's made for the note 4 qualcomm too so it must be the same, I also saw somewhere you don't need a snapdragon cpu
Sent from my HTC One M9 using XDA Free mobile app

QC2.0 is a standard, so if it's QC2.0 compliant, that would seem to suggest it would work with any QC2.0 compliant phone, no?

iElvis said:
QC2.0 is a standard, so if it's QC2.0 compliant, that would seem to suggest it would work with any QC2.0 compliant phone, no?
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Yep!
The thing is that in some website that say fast adaptive = quick charge 2.0, and other not
Sent from my HTC One M9 using XDA Free mobile app

Sorry to jump into the conversation, but does this mean the home fast charger (or w/e they name it) by samsung is a quick charger which will work with our device?

Jhonys said:
Sorry to jump into the conversation, but does this mean the home fast charger (or w/e they name it) by samsung is a quick charger which will work with our device?
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Some users said yes, in another hand S6 and note 4 are 100% compatible with quick chargers 2.0
Sent from my HTC One M9 using XDA Free mobile app

It's working great. :thumbup:
Sent from my HTC One M9.

I think i'll go and grab the Note 4 charger tomorrow as it's a 15W one.
Saw someone saying the quickcharger technology is not so good for the battery lifespan. I hope it's not the case.

Jhonys said:
Saw someone saying the quickcharger technology is not so good for the battery lifespan. I hope it's not the case.
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And they know this how? It's a brand new technology.

iElvis said:
And they know this how? It's a brand new technology.
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General properties of batteries. Fast charge and discharge cycles cause them to break down sooner.

Guys, I tested the Samsung Adaptive Fast Charger and it was a no-go. I tried two different ones under ideal charging conditions and what I found was the charger would sync with the phone and boost to rapid charge levels, but it wouldn't sustain them. It kept prematurely stepping back down to slow-speed, lower amperage levels. So IMHO you should save your $$.
The QC2.0 certified chargers that I have found work 100% are the ZeroLemon wall charger and the PureGear 12v car charger. Both will lock the phone on at high rates of charging unless (or until) the phone heats up too much, then charging is throttled until the phone cools down some. My observations are that it will definitely throttle after temps rise above 100F and if you cool the phone down by (e.g.) holding it in front of the A/C vent, rapid charging resumes.

Ok so I tested the Samsung Fast Adaptive Car charger and it's pretty fast even with the screen ON due to the Car App, though better let the screen dim by itself or the phone will get hot.
Conclusion: I recommend this charger even though it's a little bit more expensive than Chinese cheap QC 2.0 that can end up DOA or be bad for your battery
My wall QC 2.0 charger works as it should once over 3 and the screen can be a little weird

Charging currents

How would I know what the max current is a device can support like an accessory? So for example, the stock charger that comes with the Plantronics Voyager Edge is only 500ma. What happens if I plug it into a Qualcomm QuickCharge 2.0 charger like what comes with the S6? Will it blow up? Regulate down and charge normally? Charge rapidly?

km8j said:
How would I know what the max current is a device can support like an accessory? So for example, the stock charger that comes with the Plantronics Voyager Edge is only 500ma. What happens if I plug it into a Qualcomm QuickCharge 2.0 charger like what comes with the S6? Will it blow up? Regulate down and charge normally? Charge rapidly?
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it will charge normally. it doesnt matter how big the output of the charger is. the phone will regulate it to only what it wants.
only time you will have an issue is if your charger output is too small. the phone will charge slow, and risk damage to the charger.

bweN diorD said:
it will charge normally. it doesnt matter how big the output of the charger is. the phone will regulate it to only what it wants.
only time you will have an issue is if your charger output is too small. the phone will charge slow, and risk damage to the charger.
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Does this also apply to the headset I mentioned? How would the current being too low damage the charger? USB ports and car charger are very low current in general
Sent from my E5823 using Tapatalk

km8j said:
Does this also apply to the headset I mentioned? How would the current being too low damage the charger? USB ports and car charger are very low current in general
Sent from my E5823 using Tapatalk
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1. yes
2. i didnt say it would damage the charger, i said there is a risk of it. thats because if its too small, the charger is working at maximum all the time.
3. usb's are regulated, not maxing out potential. im guessing car chargers do the same, however im not sure why. likely has something to do with a safe level considering the fluctuation in input voltage from the battery.

Hmm... So what about using a non-QC 2.0 charger (such as some that Anker make) on devices that support QC 2.0? Is there some safety issue or will it just charge slightly slower?

km8j said:
Hmm... So what about using a non-QC 2.0 charger (such as some that Anker make) on devices that support QC 2.0? Is there some safety issue or will it just charge slightly slower?
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sorry, i dont know about those.
maybe you misunderstood before, i cant think of any common instance where there would be a safety issue.
as unlikely as it is that you will ever burn up a charger (or device for that matter), the only thing that will happen is some small electronic parts will go bad. not some huge fire or whatever. sure on the device there could be a nice exploding fire, but there about always from defect and also extremely rare. it happens maybe 1 or 2 times a year, and its gets posted everywhere, then people think its an epidemic and start asking all these unnecessary questions. im sure the yearly device sales are in the hundreds of millions work wide. if a couple a year blow up, well s happens.