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[Q] Using Samsung Note II charger

Hi guys,
My friend recently got a Note II. It comes bundled with official Samsung charger with output capacity of 5V ~2A. Just wanted to ask if it is safe to charge our phone using the high capacity charger?
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emanoj.i9103 said:
Hi guys,
My friend recently got a Note II. It comes bundled with official Samsung charger with output capacity of 5V ~2A. Just wanted to ask if it is safe to charge our phone using the high capacity charger?
Sent from my GT-I9103 using xda app-developers app
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not sure but i would prefer you not to use it.
the higher current output would surely decrease he battery life.
your touchscreen might get messed up while charging (if that happens then surely don't do it)
and in worst case, the battery might blast...

I use an HTC charger (because of the very good and practical structure of usb cable and charger) the output of which is 5V and 1A compared to Samsung's 0.7A. Normally it will not brick your phone and it'll even charge faster because of the higher amount of electricity delivered through the cable. By the definition of performance (which is the energy delivered in a unit of time), you see that the higher the electric current is, the higher the performance is. I'm sure that the battery and device will heat up. So all in all, you can try it as the voltage output is the same, but be aware! And keep an eye on the temperature!
Sent from my GT-I9103 with CM10

Adam77Root said:
I use an HTC charger (because of the very good and practical structure of usb cable and charger) the output of which is 5V and 1A compared to Samsung's 0.7A. Normally it will not brick your phone and it'll even charge faster because of the higher amount of electricity delivered through the cable. By the definition of performance (which is the energy delivered in a unit of time), you see that the higher the electric current is, the higher the performance is. I'm sure that the battery and device will heat up. So all in all, you can try it as the voltage output is the same, but be aware! And keep an eye on the temperature!
Sent from my GT-I9103 with CM10
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That is one hell of an analysis!:good:

Thanks a lot Adam. I'll try charging with an eye on temp.
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Lols.. I m surrounding with Sony, LG, HTC & my own Note 2 handset. but I usually charged from everybody's charger. But yes Adam did lots of research & as he said when I charge my mobile using Note 2 charger, it get charged fast then R's one. so, thinking to keep only Note 2 charger now.

Adam77Root said:
I use an HTC charger (because of the very good and practical structure of usb cable and charger) the output of which is 5V and 1A compared to Samsung's 0.7A. Normally it will not brick your phone and it'll even charge faster because of the higher amount of electricity delivered through the cable. By the definition of performance (which is the energy delivered in a unit of time), you see that the higher the electric current is, the higher the performance is. I'm sure that the battery and device will heat up. So all in all, you can try it as the voltage output is the same, but be aware! And keep an eye on the temperature!
Sent from my GT-I9103 with CM10
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Are you a student of electronics / related branch by any chance ?

Woh Science ki taraf se hai...
Translation: He's from the science side...
Tapatalked from my Galaxy R GT-I9103 using XDA Premium App
I don't go to sleep until I utilize my quota of 8 thanx a day!

'cooleagle' said:
Are you a student of electronics / related branch by any chance ?
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Here goes my observations, I used Note II charger to charge R. It does charge faster than the stock charger. Also, as adam said, phone got little heated up too.
Offtopic: I did my bachelors in electronics. I asked the question coz I didn't bother to know about hardware internals and wanted to know if there's some overcharge protection built in...
Thanked you for the thought about electronics. Cheers!
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No, I go to a class which specialises in maths and physics. I'm interested in electronics and do researches mainly in free time. It's one of the best parts of physics for me.
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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?
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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?
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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?
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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.
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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)
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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
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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
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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.
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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)
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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
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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!
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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.
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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?
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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
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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?
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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.
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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.
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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.
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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

Charging using 2A charger?

I have note2 right now which have to go. But I'll keep my office charger which is 2A.
Can I safely use it to charge n5?
Sent from SGH-i317m

Using chargers with a high power (A) is no problem, the phone will not "take" more than it needs.
Sorry for the poor english ^^

The issue is if charging IC can handle 2A current or not. I dying wanna fry it lol
I would think it should not be an issue while 2A ICs are widely used in our days, but "better be safe then sorry".
Sent from SGH-i317m

I charge mine with my xz charger 1.5a no problem

The charging block that comes with the Nexus 5 is 5.0 volt, 1.2 amp.

Jbondop said:
I charge mine with my xz charger 1.5a no problem
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While AFAIK there's no 1.5A ICs, than its 99% safe to say they using 2A nominal IC.
Thanks guys
Sent from SGH-i317m

If using a different charger was a problem they would have made the connection something other than micro USB.
Sent from my Nexus 5 using XDA Premium 4 mobile app

Not really. Charging current depends on IC installed, not the connector itself.
Sent from SGH-i317m

From what I understand, you could use a 10A charger and still be fine. The handset will not take any more than it needs. Basically, the charger doesn't push current, the phone pulls it.

TopherBarnett said:
From what I understand, you could use a 10A charger and still be fine. The handset will not take any more than it needs. Basically, the charger doesn't push current, the phone pulls it.
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Thats correct and nothing else. No way to destroy a phone with too much A because it just takes as much it needs. The 2A on an charger is just the maximum power output. It is physical impossible to PUSH the ampere in the device.

powerbank 2A output bad for phone ?

What's the side effect of using 2A output powerbank on the cellphone ?
From my experience, the output of cellphone adaptor usually between 500mAh-1Ah. Well, except phone with bigger screen (which i don't have).
What i notice is, the back of the phone are usually hotter compare if i charge my phone using phone adaptor or via usb.
I am kinda worry with this excess heat. Heat is not good for electric components.

It will shorten the lifetime of the battery

phi7ip said:
It will shorten the lifetime of the battery
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Seriously ?

Yes, if the phone is not designed for 2A
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phi7ip said:
Yes, if the phone is not designed for 2A
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What about a phone that's designed for 750mAh and it's being charge with 1.2A powerbank ? Since the common minimum powerbank output are 1.2A.

Even that would be harmful there are 500mA powerbanks available which would be ok
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phi7ip said:
Even that would be harmful there are 500mA powerbanks available which would be ok
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I see. Thank you.
What about the opposite. 1.5A capable cellphone that's being charge with 750mAh charger ?
I think it would be fine. Just the time it needs to charge the phone is longer. What do you think ?

That would be perfectly ok, you're right it just takes longer to charhe
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it does not work with my touchpad (HP). If i not charge with 2A output is no charge