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Is it just me

Charging wise this is the fastest charging smartphone I've ever owned. And I'm a phone whore. From hero, instinct 1/2, evo, evo3d, hd2, note, and a few others. Anyone else notice
From the I-killer

It seems to charge pretty fast from the A/C charger but plugging it in to your Pc seems to take FOREVER.

Mine takes forever charging no matter what. Ive put it on the charger at 50% and it took 3hours ish to get back to 100%. Granted my phone could probably go two days with four hours of on screen time too.

Granted I can't speak for stock because I rooted asap. I mainly use AC 95% too. Not sure if how much root affects it, I'm on synergy (awesome btw).
From the I-killer

mathematically yes. My old droid x charged at a max 750ish mA. The S3 charges at 1000mA

It is just you...
In my case at least.
Sent from my SCH-I535 using Tapatalk 2

Charging on AC is really fast for me too. Car charging and PC charging not so much.

GNEX was my fastest charging smartphone...but also had the worst battery life.

1ManWolfePack said:
It is just you...
In my case at least.
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
Awesome thanks
From the I-killer

sprintuser1977 said:
Charging wise this is the fastest charging smartphone I've ever owned. And I'm a phone whore. From hero, instinct 1/2, evo, evo3d, hd2, note, and a few others. Anyone else notice
From the I-killer
Click to expand...
Click to collapse
I am betting it's because most of us have 1amp or 2.1 amp chargers available in the car. I, personally, still use the motorola 950mAh car charger, which speeds thru the charging process too.
USB still pumps out 500 mAh at best, always gonna be slow.
None of this has to do with the phone, btw.

Slow charging for me. But its random. Sometimes its decently quick but other times it takes forever to charge. Fastest phone to charge for me was the OG droid.
Sent from my SCH-I535 using xda app-developers app

I've noticed that when its plugged into the wall charger, its super fast, computer though is utterly slow.

Its really fast, about an hour and I'm at 100% from 0%.

Elite49 said:
Its really fast, about an hour and I'm at 100% from 0%.
Click to expand...
Click to collapse
About same here, on wall
From the I-killer

There is a thing in the charging port that only the samsung charger activated that allows charing upwards of 1000 when using normal micro usb only does 300.
If you download imosyens leankernal he developed it into the kernal that you go to terminal editor and put "ffc"and charger will go as fast as thr samsung one.
Sent from my SCH-I535 using xda app-developers app

Lol I'm the opposite. Coming from a Galaxy Nexus this phone charges much slower. Galaxy Nexus would be fully charged in maybe an hour and a half. With the GS3 it's closer to 3 hours for a full charge. Hear it's the low-power brick that comes with it though.

LGeX said:
Lol I'm the opposite. Coming from a Galaxy Nexus this phone charges much slower. Galaxy Nexus would be fully charged in maybe an hour and a half. With the GS3 it's closer to 3 hours for a full charge. Hear it's the low-power brick that comes with it though.
Click to expand...
Click to collapse
Yep. For example, the Motorola SPN5400A will charge the S3 in about 1\2 to 1\3 the time it would take if plugged into a USB port. I honestly believe it's because it has quality internal circuitry. Hell, at .95 mAh it charges quicker than most 2.1mAh chargers. Again, has nothing to do with the phones, it's the chargers that come with.

mine charges pretty quick as well. best phone ive had hands down.

LGeX said:
Lol I'm the opposite. Coming from a Galaxy Nexus this phone charges much slower. Galaxy Nexus would be fully charged in maybe an hour and a half. With the GS3 it's closer to 3 hours for a full charge. Hear it's the low-power brick that comes with it though.
Click to expand...
Click to collapse
3 hrs seems off. I think I could wire mine to my electric razor and charge it faster
From the I-killer

Just for info, my wireless energizer pad and Verizon wireless door charge faster than the factory charger. And my factory charger will charge between 1.5 and 2 hours from 3% or 4%.
If you are taking over 2 hours I would check the battery and make sure it isn't swollen or something wrong with it. As far as usb most ports are "as stated above" not going to supply juice fast enough to charge quickly.
And it's probably worth seeing if something is on thats sucking power, Bluetooth, gps, facebook, anything that sync's alot. And using almost as much power as the usb is putting out.
See the Galaxy sIII shine via SynergyRom

Maxell air voltage qi wireless

Ive seen threads for almost all the wireless chargers except this one, so ive decided to create one to unite all the information.
Ive just ordered it on amazon for 50€.
What is your experience with it guys? Cant wait to recieve it.
Sent from my Nexus 4 using xda app-developers app

I have one here and it works fine, charges my phone with no problem and temperatures never go above 36c. The only two issues I have is firstly the Nexus 4 slides around on this thing like there is a layer of Teflon between the phone and charger. I heartily recommend LEAVING the protective film that the Maxell comes with ON the charger that stops the phone slipping.
Secondly forget about using daydream with the charger, in my experience daydream uses up too much power to be useful with wireless charging. The battery charges at snail pace and the phone heats up to over 45c with daydream enabled. I like the Maxell and I like wireless charging my first choice would be the Nexus Orb if it was available, but the Maxell does a good a job as any.

Thanks for the advice. Will keep maxell plastic on. Wish they could deliver it faster. Will take a month
Sent from my Nexus 4 using xda app-developers app

Just got one of these from eBay for £42. Seems to charge fine with the N4 the S line TPC case on.
My only, albeit minor, issue with it is the bright blue LED which illuminates while charging. This is easily resolved by making sure the N4 covers it or stick a bit of dark tape on top.
Sent from my Nexus 7 using xda premium

I just picked a Maxell Air Voltage charger up from Ebay here in the UK, it is a very nice bit of kit I must say and works great, the only downside is that the charging range isnt too good, I was expecting at least 6mm so that I could charge it whilst it was in my flip case, it wont charge through the flip case and it wont charge through any case that is metal or has a foil liner this of course is fairly obvious.
i am sure some of the thinner plastic half cases and gel cases it will be fine, I think that the Nillkin Fashion Shape Flip Leather Case is also OK with it so I will pick one of those up with it.
I tested the effective range with UK 2 x 1p pieces stacked on top of each other which is 3.0 mm thick in total, so if your case it over 3mm thick then it wont work without taking the phone out of the case, something to think about if you are going to get this charger.
I wouldnt hang on to get the orb charger, thats a long way off IMHO, the Maxell air voltage is a great unit, is cheap and will work with other QI devices, well worth getting it.

Sounds good so far. I've ordered mine off Amazon after hesitating because of the price.. Taking ages to arrive during this holiday season. Looking forward to it.

Had mine for around 2 weeks now, works perfectly with my tpu case on.
Did originally have daydream turned on and it was a little slow but now its off it charges great.
Well worth the money. If they were a little cheaper i'd buy another!

hi,
does it use 110 or 220 voltage?

I also have the Maxell charger of Ebay and it charges through the Nillkin hard case with no issues at all which was a deal breaker for me if it couldn't.
I agree with the comment to leave Daydream off as it seems to charge the phone better..
Sent from my Nexus 4 using xda premium

Just got mine. It got up to 98%, does yours get to 100%?
Sent from my Nexus 4 using xda app-developers app

Mine gets up to 100% although not the first time that I charged it for some reason...
Sent from my Nexus 4 using xda premium

ianm said:
Just got one of these from eBay for £42. Seems to charge fine with the N4 the S line TPC case on.
My only, albeit minor, issue with it is the bright blue LED which illuminates while charging. This is easily resolved by making sure the N4 covers it or stick a bit of dark tape on top.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Cheers mate, I was a bit worried about charging through my S-Line case. I've just ordered one from play. I have a desktop stand, but sometimes the connection doesn't fit in properly.

Got my nillkin case for my n4 which is superb and can confirm the Maxwell does charge through it as the other poster mentioned so it isn't a one off, if the case was a little thicker it won't do it though so be warned
Sent from my Nexus 4 using xda app-developers app

rttnpig] said:
Just got mine. It got up to 98%, does yours get to 100%?
Click to expand...
Click to collapse
Mine is getting stuck at 89%. Then it goes in to a state of limbo where it disconnects, uses up a bit of charge, reconnects, gets back to 89% disconnects, etc etc.
Anyone else? Defective unit?
Also, has anyone else suffered severe battery life deterioration after using this? It may well just be coincidence but about 3 days after first using it my battery life has fallen off a cliff. The Android Kernal OS is suddenly showing up at over 30% usage on the stock battery data page, whereas before it was under 10%.

Working fine with mine no problems. But I find when it charges to 100% it waits until it drops to 95% before recharging again. This is fine as I understand that qi charging doesn't allow for trickle charging, so it's either full power or no power. I wouldn't say it degrades the battery life but rather it screws up the battery stats. To fix this I just plug the usb charger once a week or so.
I think the capacity reading gets messed a bit as due to the on/off charging after reaching full charge, since unlike trickle charging where the battery's voltage is kept constant, the voltage is always raising or falling. Depending on when you take your phone away with you in relation to its current charge state you might get a slightly lower capacity for that particular charge.
Sent from my Nexus 7 using Tapatalk HD

Makaijin said:
Working fine with mine no problems. But I find when it charges to 100% it waits until it drops to 95% before recharging again. This is fine as I understand that qi charging doesn't allow for trickle charging, so it's either full power or no power. I wouldn't say it degrades the battery life but rather it screws up the battery stats. To fix this I just plug the usb charger once a week or so.
I think the capacity reading gets messed a bit as due to the on/off charging after reaching full charge, since unlike trickle charging where the battery's voltage is kept constant, the voltage is always raising or falling. Depending on when you take your phone away with you in relation to its current charge state you might get a slightly lower capacity for that particular charge.
Sent from my Nexus 7 using Tapatalk HD
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Click to collapse
What im going to do to solve this is buy a electricity temporizator and set it to 3 h so it stops once those hours are done. I always charge mobile at the same hour.
Enviado desde mi Nexus 4 usando Tapatalk 2

Makaijin said:
Working fine with mine no problems. But I find when it charges to 100% it waits until it drops to 95% before recharging again. This is fine as I understand that qi charging doesn't allow for trickle charging, so it's either full power or no power. I wouldn't say it degrades the battery life but rather it screws up the battery stats. To fix this I just plug the usb charger once a week or so.
I think the capacity reading gets messed a bit as due to the on/off charging after reaching full charge, since unlike trickle charging where the battery's voltage is kept constant, the voltage is always raising or falling. Depending on when you take your phone away with you in relation to its current charge state you might get a slightly lower capacity for that particular charge.
Sent from my Nexus 7 using Tapatalk HD
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Click to collapse
Trickle charging is horrible for lithium ion/poly batteries. Unplug from AC charger as soon as you can. LiOn batteries don't like to be at full peak 4.2v for long. It's actually better that many of these Qi chargers are only charging to 89 or 95% of capacity by the wireless charges. It's better for the long life of the battery. Charge them often too. Don't let it go down to 10% or 5%. Put them on the charger when your phone is down to 50% and take them off the charger when they get to 90%. It's easy to do with a wireless charger.

Lakino said:
Trickle charging is horrible for lithium ion/poly batteries. Unplug from AC charger as soon as you can. LiOn batteries don't like to be at full peak 4.2v for long. It's actually better that many of these Qi chargers are only charging to 89 or 95% of capacity by the wireless charges. It's better for the long life of the battery. Charge them often too. Don't let it go down to 10% or 5%. Put them on the charger when your phone is down to 50% and take them off the charger when they get to 90%. It's easy to do with a wireless charger.
Click to expand...
Click to collapse
Source.
Cuz all that contradicts lithium theory.
Sent from my Nexus 4 using xda premium

ptesmoke said:
Source.
Cuz all that contradicts lithium theory.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Batteryuniversity.com

Lakino said:
Trickle charging is horrible for lithium ion/poly batteries. Unplug from AC charger as soon as you can. LiOn batteries don't like to be at full peak 4.2v for long. It's actually better that many of these Qi chargers are only charging to 89 or 95% of capacity by the wireless charges. It's better for the long life of the battery. Charge them often too. Don't let it go down to 10% or 5%. Put them on the charger when your phone is down to 50% and take them off the charger when they get to 90%. It's easy to do with a wireless charger.
Click to expand...
Click to collapse
I'm actually aware that constant trickle charging at full charge isn't ideal for long term health of the battery. Which is why I mentioned I only plug the wired usb charger once a week. I only plug it in for about 30 mins so the voltage stabilises as to help the phone more accurately display its charge % state better. Obviously it's all subjective as I've yet to actually perform any tests to see if it's ture or not.
On the subject of long term battery health, trickle charging on wired may not be ideal, but nor is wireless charging due to heat it produces. During wireless charging, according to my battery stats widget the phone reaches 39°C, while wired usb it never goes above 22°C (room temp. basically). The good thing about wireless charging is the heat drops back down when the battery is full and the qi charger is no longer sending any current. But when the charge drops back down to 95 % it restarts charging again, and the heat returns.
So, which is more harmful to the battery, heat or constant trickle charging? In either cases it's still a good practice to remove the phone from the charger (both wired or wireless) once it's reached full charge.
Sent from my Nexus 7 using Tapatalk HD

car chargers

I know this is a bad subject to bring into discussion but notice the S4 charger for the wall charger charges faster I bought a generic car charger for my last phone and it couldn't even keep up with the charge if I was using the GPS...... Any idea what a good car charger brand is or even Samsung makes for for the S4? I really would like a nice car charger that won't screw things up with my phone thanks all if you can just put your input if not thats ok too...

i bought this http://www.amazon.co.uk/MOFRED®-Mic...sr=1-1&keywords=samsung+galaxy+s4+car+charger should be good

The Motorola with the blue light, pn SPN5400A.

I am also looking for a car charger that quickly charges the battery like the stock wall charger. I went from 1% to 50% in around 45 minutes with the stock wall charger the other day.

Try to find a 2000mA (2A) car charger

i would just get something like this i were you guys. I have one and it works great http://www.ebay.com/itm/171038027580?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Xcor3 said:
i would just get something like this i were you guys. I have one and it works great http://www.ebay.com/itm/171038027580?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
Click to expand...
Click to collapse
its 1 amp.
get at least a 2 amp charger @ OP

I agree 2Amp tends to be the way to go from what im learning but still looking for a great car charger lol

Is there a way within the UI to see how much charge the phone is getting? I have a generic USB car charger and I want to know if it's .5, 1, or 2 amps.
Generally I'm happy if I can use Google Maps navigation on a charger without losing any battery % but it would still be nice to know if I'm getting the fastest charge possible.

snakecharmer23 said:
Is there a way within the UI to see how much charge the phone is getting? I have a generic USB car charger and I want to know if it's .5, 1, or 2 amps.
Generally I'm happy if I can use Google Maps navigation on a charger without losing any battery % but it would still be nice to know if I'm getting the fastest charge possible.
Click to expand...
Click to collapse
Not that I know of but I am not too good when it comes to these kinds of questions lol sorry

snakecharmer23 said:
Is there a way within the UI to see how much charge the phone is getting? I have a generic USB car charger and I want to know if it's .5, 1, or 2 amps.
Generally I'm happy if I can use Google Maps navigation on a charger without losing any battery % but it would still be nice to know if I'm getting the fastest charge possible.
Click to expand...
Click to collapse
Generic car chargers, usually offers 700mah or 1000mah for the most.
It seems that getting 2000mah charger is the only good solution.

snakecharmer23 said:
Is there a way within the UI to see how much charge the phone is getting? I have a generic USB car charger and I want to know if it's .5, 1, or 2 amps.
Generally I'm happy if I can use Google Maps navigation on a charger without losing any battery % but it would still be nice to know if I'm getting the fastest charge possible.
Click to expand...
Click to collapse
Battery Monitor Widget from the market will. It shows discharge rate when off charge on charging rate when on charger.
Sent from my SPH-L720 using xda app-developers app

snakecharmer23 said:
Is there a way within the UI to see how much charge the phone is getting? I have a generic USB car charger and I want to know if it's .5, 1, or 2 amps.
Generally I'm happy if I can use Google Maps navigation on a charger without losing any battery % but it would still be nice to know if I'm getting the fastest charge possible.
Click to expand...
Click to collapse
Battery Monitor Widget can show you the charging rate. I have the Pro version.
Sent from my Nexus 7 using Tapatalk 2

swieder711 said:
Battery Monitor Widget can show you the charging rate. I have the Pro version.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Could you show a screen shot of where that app shows the charging rate?

I bought one from best buy it charges just as good or even faster than the stock charger. It's a Rocket fish 3 amp
Sent from my SPH-L720 using xda premium

Beastn said:
I bought one from best buy it charges just as good or even faster than the stock charger. It's a Rocket fish 3 amp
Sent from my SPH-L720 using xda premium
Click to expand...
Click to collapse
I have the same one. Works great.

Just keep in mind battery monitor widget does a best guess calculation on Samsung devices because Sammy refuses to put the code in that reports the actual current. Back on GB on my Captivate one of the roms had the code and it was nice but Samsung in its infinite wisdom deems it more important to include 500MB of bloat and omit this tiny important driver.
---------- Post added at 08:37 PM ---------- Previous post was at 08:16 PM ----------
Here are a few screen shots
http://pcsites.com/ebay/2013-05-11 20.19.41.png
http://pcsites.com/ebay//2013-05-11 20.19.49.png
http://pcsites.com/ebay//2013-05-11 20.28.15.png
I am considering 2 http://www.amazon.com/Release-Bolse...UTF8&colid=2YCT75R10D09V&coliid=IX3MOZIVWPAU4
or
http://www.amazon.com/Lightening-Ch...TF8&colid=2YCT75R10D09V&coliid=I1H99YUA2ZS8XI

Can someone recommend a car charger that I can buy in the UK that can charge the S4 reliably at 2A? I tried a few so-called 2A chargers, but they are only able to deliver 1.1A (as measured by the Galaxy Current App), while the wall charger delivers 1.9A.

Mr.Pintu said:
Can someone recommend a car charger that I can buy in the UK that can charge the S4 reliably at 2A? I tried a few so-called 2A chargers, but they are only able to deliver 1.1A (as measured by the Galaxy Current App), while the wall charger delivers 1.9A.
Click to expand...
Click to collapse
I've ordered this 2a charger for the car and am just waiting for it to arrive now (from South Korea...).
http://www.ebay.co.uk/itm/221224291949?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648
Pleomax is apparently a subsidiary company of Samsung, so I'm expecting compatibility/functionality to be good.
I ordered the following holder to go with it too, from the same manufacturer and seller, its currently in the same shipment as the charger:
http://www.ebay.co.uk/itm/SAMSUNG-G...AU_MobilePhoneAccessories&hash=item4ac397a9c3

Mr.Pintu said:
Can someone recommend a car charger that I can buy in the UK that can charge the S4 reliably at 2A? I tried a few so-called 2A chargers, but they are only able to deliver 1.1A (as measured by the Galaxy Current App), while the wall charger delivers 1.9A.
Click to expand...
Click to collapse
Just to point out.... While you do need a 2A+ charger, the cable also plays a huge factor. I've measured anywhere from 460mA to 1900mA depending on the cable plugged into it.
Sent from my SGH-M919 using xda premium

3 amp charger.

I guess you could consider a aftermarket charger a accessory....... so ive seen on here that every one is pretty satisfied with the 2amp charging speed on our phones, I had a 3amp charger (lost it) that I tried to charge my gs3 on and the battery got really hot. I wonder if a 3amp usp port would charge the gs4 faster?? Or just be a wast of money?
Sent from my SAMSUNG-SGH-I337 using xda premium

MattZ71 said:
I guess you could consider a aftermarket charger a accessory....... so ive seen on here that every one is pretty satisfied with the 2amp charging speed on our phones, I had a 3amp charger (lost it) that I tried to charge my gs3 on and the battery got really hot. I wonder if a 3amp usp port would charge the gs4 faster?? Or just be a wast of money?
Sent from my SAMSUNG-SGH-I337 using xda premium
Click to expand...
Click to collapse
Imo its a waste of money... I personally am still going to use my 850mA chargers in most cases, but Ill keep my 2amp nearby in case I need a quick 20% mid day

MattZ71 said:
I guess you could consider a aftermarket charger a accessory....... so ive seen on here that every one is pretty satisfied with the 2amp charging speed on our phones, I had a 3amp charger (lost it) that I tried to charge my gs3 on and the battery got really hot. I wonder if a 3amp usp port would charge the gs4 faster?? Or just be a wast of money?
Sent from my SAMSUNG-SGH-I337 using xda premium
Click to expand...
Click to collapse
S4 has a hardware limitation on charging current, right now it won't go above 1100mah while charging which is 1.1a, perhaps in future with kernel development we'll be able to raise the charging current but for now purchasing a charger above 2a would be completely useless.
Sent from my S IV (Octa Core Beast)

I mean most of the charging I do for my phone is when im asleep

Thanks for the replys. The information I needed.
Sent from my SAMSUNG-SGH-I337 using xda premium

Nasty_z said:
S4 has a hardware limitation on charging current, right now it won't go above 1100mah while charging which is 1.1a, perhaps in future with kernel development we'll be able to raise the charging current but for now purchasing a charger above 2a would be completely useless.
Sent from my S IV (Octa Core Beast)
Click to expand...
Click to collapse
On this point what you need to realize is that the usb cable loses a bunch of the power on the way... so like, a 3 foot cable might deliver most of the power to the phone ... a 10foot cable might only deliver 66% of it... so really a 2amp charger is whatthe s4 needed but going above it is kind of useless

The S4 actually goes to 1,910a when charging, I've checked with and app (galaxy charging current) that's why it charges so fast

Mine shows the same thing

duykhang524 said:
The S4 actually goes to 1,910a when charging, I've checked with and app (galaxy charging current) that's why it charges so fast
Click to expand...
Click to collapse
Do the lights dim everywhere in your house?
Oh and guys/gals, you cannot get around Ohm's law. 2A at 5V is 10Watts. You can use a 10A (50W) PSU but your phone will only use what it's designed to charge at unless you increase the voltage which I don't recommend unless you like to smell burned electronics.
Larger power supplies do have an advantage, however. You can charge multiple devices at the same time, i.e. a tablet, phone, spare battery, all at once. Good to prepare for a storm like we had last night here.

duykhang524 said:
The S4 actually goes to 1,910a when charging, I've checked with and app (galaxy charging current) that's why it charges so fast
Click to expand...
Click to collapse
Are you guys serious? I have the original charger from Samsung, mine charges at 1100 according to the same app
Edit: uh whoops..
Just checked, it says 1900 - sorry for the confusion
Sent from my S IV (Octa Core Beast)

cpufrost said:
Do the lights dim everywhere in your house?
Oh and guys/gals, you cannot get around Ohm's law. 2A at 5V is 10Watts. You can use a 10A (50W) PSU but your phone will only use what it's designed to charge at unless you increase the voltage which I don't recommend unless you like to smell burned electronics.
Larger power supplies do have an advantage, however. You can charge multiple devices at the same time, i.e. a tablet, phone, spare battery, all at once. Good to prepare for a storm like we had last night here.
Click to expand...
Click to collapse
10w is not a lot btw... My laptop pulls 60w on load and a hair dryer is 1000w... I mean't 1.9A sry for the confusion in french we use "," for the decimals in numbers

Nasty_z said:
Are you guys serious? I have the original charger from Samsung, mine charges at 1100 according to the same app
Edit: uh whoops..
Just checked, it says 1900 - sorry for the confusion
Sent from my S IV (Octa Core Beast)
Click to expand...
Click to collapse
1900 here for me as well, USB cords can also limit the current supplied, can only get this rate on a 6' (or less) my 10' and 15' each drop down quite a bit

duykhang524 said:
10w is not a lot btw... My laptop pulls 60w on load and a hair dryer is 1000w... I mean't 1.9A sry for the confusion in french we use "," for the decimals in numbers
Click to expand...
Click to collapse
Haha yes I figured, just being sarcastic, no harm meant.
I will add using this app I find interesting results of cable length vs. mA delivered. If you want to charge fast use a shorter cord.
I may connect it to a bench supply and see how it reacts to a gentle overvolt, say 5.5V. This could be what's needed to compensate for a longer cable, i.e. getting ~2A with a ten foot cable!

cpufrost said:
Haha yes I figured, just being sarcastic, no harm meant.
I will add using this app I find interesting results of cable length vs. mA delivered. If you want to charge fast use a shorter cord.
I may connect it to a bench supply and see how it reacts to a gentle overvolt, say 5.5V. This could be what's needed to compensate for a longer cable, i.e. getting ~2A with a ten foot cable!
Click to expand...
Click to collapse
Since the S4 is using QuickCharge from Qualcomm, I wonder if a generic 2A charger would affect charging time. http://www.anandtech.com/show/6914/samsung-galaxy-s-4-review/2

duykhang524 said:
Since the S4 is using QuickCharge from Qualcomm, I wonder if a generic 2A charger would affect charging time.
Click to expand...
Click to collapse
I'm guessing that this only applies to the GT-I9505?
Sent from my GT-I9500

guywhoeatsjello said:
I'm guessing that this only applies to the GT-I9505?
Sent from my GT-I9500
Click to expand...
Click to collapse
Yea

datrumole said:
1900 here for me as well, USB cords can also limit the current supplied, can only get this rate on a 6' (or less) my 10' and 15' each drop down quite a bit
Click to expand...
Click to collapse
Just a thought but what about a 10ft+ cord with a 3 amp charger? I wonder if the 3 amp will bring up the charging?
Sent from my SAMSUNG-SGH-I337 using xda premium

cpufrost said:
Do the lights dim everywhere in your house?
Oh and guys/gals, you cannot get around Ohm's law. 2A at 5V is 10Watts. You can use a 10A (50W) PSU but your phone will only use what it's designed to charge at unless you increase the voltage which I don't recommend unless you like to smell burned electronics.
Larger power supplies do have an advantage, however. You can charge multiple devices at the same time, i.e. a tablet, phone, spare battery, all at once. Good to prepare for a storm like we had last night here.
Click to expand...
Click to collapse
The currents which we're discussing when charging apply from the phone to the battery which subsequently uses the battery voltage as a charging indicator. Those 1.9A only happen at low battery percentages with voltages around 3.6V or lower, with raising voltage the current is limited. This is basically what QC quickcharge is. I don't really see the gimmick in it, as such a logic could be emulated in software on any phone.

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