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Hi bringing one charger around would be much convenient. Can i use ipad charger, with 2A output to charge galaxy note?
Tq.
Yes. I've charged mine with it many times.
Hey thanks...
Apple out of norms
Hi
Using a standard USB cable will get you a slow charge, even if the Ipad charger is very powerfull. This is because apple doesn't follow the rules.
Charging your Note may take 6 hours then.
To get fast charge, you need to modify your cable or charger, as stated in this thread : http://forum.xda-developers.com/showthread.php?t=1497864&page=2
jabab said:
Hi
Using a standard USB cable will get you a slow charge, even if the Ipad charger is very powerfull. This is because apple doesn't follow the rules.
Charging your Note may take 6 hours then.
To get fast charge, you need to modify your cable or charger, as stated in this thread : http://forum.xda-developers.com/showthread.php?t=1497864&page=2
Click to expand...
Click to collapse
The increased charge in this mod seems to work for charging via usb port, power from a pc. Charge from main ac lead still higher.
So does charging my Note with an ipad adapter + Note usb cable help increase charge since the ipad adapter has an 2A output??
I'll try to make it clear.
Using a common adapter or any pc USB II or ANY apple adapter will give give you a slow charge with a standard USB to micro-USB 4 wire cable.
This is simply because they can't usually deliver more than 0.5A. For apple, they have a specific standard out of the USB norm.
To go into fast charge mode, the gnote scans pin 2 and 3 of the USB link. If they are short circuited, the gnote tries to go into fast charge mode, and draws up to 1A.
The short circuit of data pins (2 and 3) is specified in the USB norm to state "this adapter can provide 1A"
Some adapters, such as the Samsung one I got with my gnote, already have these pin short circuited inside them and make your phone go into fast charge mode.
If you have an adapter able to supply 1A or more, such as your Ipad's, the simplest way to fast charge your gnote is to have a modified cable. No risk to harm your phone nor your adapter if you respect the wiring.
Sent from my GT-N7000 using Tapatalk
I think i understand now. Thanks so much Jabab.
jabab said:
I'll try to make it clear.
Using a common adapter or any pc USB II or ANY apple adapter will give give you a slow charge with a standard USB to micro-USB 4 wire cable.
This is simply because they can't usually deliver more than 0.5A. For apple, they have a specific standard out of the USB norm.
To go into fast charge mode, the gnote scans pin 2 and 3 of the USB link. If they are short circuited, the gnote tries to go into fast charge mode, and draws up to 1A.
The short circuit of data pins (2 and 3) is specified in the USB norm to state "this adapter can provide 1A"
Some adapters, such as the Samsung one I got with my gnote, already have these pin short circuited inside them and make your phone go into fast charge mode.
If you have an adapter able to supply 1A or more, such as your Ipad's, the simplest way to fast charge your gnote is to have a modified cable. No risk to harm your phone nor your adapter if you respect the wiring.
Click to expand...
Click to collapse
what i want to know is:
if the ipad charger is 2A, will the phone draw all that 2A or just 1A?
im asking because if it designed to work with a 1A charger - is the draw capped at 1A?
Hi
The draw of any phone is limited to its maximum power consumption ie phone consumption + battery charging.
I believe this draw is limited to 1A within the gnote.
Having a 2A charger only means it can provide up to 2A. It's the "pipe" size, in a way.
If there were a way to increase the gnote draw to more than 1A, by example in order to charge the battery faster while using the GPS, this could be :
Either telling the gnote, using a resistor on the 5th pin of the micro-USB plug.
Or using a specific app.
(or both)
I'm not aware of this possibility at the moment.
Sent from my GT-N7000 using Tapatalk
Jabab, thanks for ur valuable expert info. I've notice that charging my gnote with the ipad charger isnt much faster. But charging iphone with ipad charger does gives a great boost. What makes it possible with iphone?
Apple uses a not so different system to tell the iphone or the Ipad that it is connected to a powerful charger: the data pins are connected to the power pins through a ladder of resistances.
I see one main advantage to this: apple could change the resistances values inside the charger to indicate to the device if it is an 1A, 2A or any other current charger.
The main drawback is that this system is compatible with nothing but... Apple devices. This why you get a slow 0.5A charge with a 2A capable Ipad charger.
Sent from my GT-N7000 using Tapatalk
I found the original thread where I learned all this. It may be much clearer than my own explanations.
http://forum.xda-developers.com/showthread.php?t=1384253
I believe though that you need a 1A (1000mA) at least charger to do the indicated mod on the charger for use with a Galaxy Note.
Sent from my GT-N7000 using Tapatalk
I was thinking about putting a new receptacle with USB and one outlet somewhere on my kitchen counter. Problem is the two better companies have two very different amperage's. Cooper is .7a and Leviton is 2.1a, both have two USB ports and one outlet. The charger for our E4GT is 1a and I also have a Galaxy Tab 10.1 that would need the higher amp version, but many have said to NOT use a higher amp charger than the one our phones came with, which is 1.
So what do you think? Is it really that bad for our phones/battery to charge it using a higher amp source? I know our charger cube is small but I also need it in various locations at home or at the office so having an outlet like this in my kitchen would be awesome.
I hate how slow USB charges our phones, so I assume .7 would still be kinda slow and not charge my tablet either.
http://www.amazon.com/Cooper-Wiring-Devices-TR7740W-K-Combination/dp/B007NC5GI4
http://www.amazon.com/Leviton-T5630...F8&qid=1350409796&sr=1-1&keywords=leviton+usb
My vote is for the 700. It will be better for your batteries over time.
Interesting thing that I have learned is that the Leviton version only pushes the higher amps on one of the USB ports. There is no where that states how much the one that gets less does though and I have read that if you plug in a device that does not need the extra amps that USB somehow puts out less amps and it charges slower.
I need to do more investigating though.
revamper said:
My vote is for the 700. It will be better for your batteries over time.
Click to expand...
Click to collapse
I agree to an extent.
I feel that it really depends on how long you keep your usb charged devices. Battery degradation may not be an issue if you upgrade often or are the type that never has anything older than the 2nd, sometimes 3rd, newest model device on the market. Also, a lot of the newer devices require higher amps to charge at a reasonable time. This transitions into charging habits. On the 0.7A charger, you may find yourself leaving devices on chargers over night potentially hours longer after fully charging. This is arguably also damaging to the battery.
Either way you go, you may find yourself with a bunch of 6' microUSB cables from devices taking forever to charge or battery degradation. :silly:
Your phone is only going to use as many amps as it can. Say a GS2 charges at 450ma USB and 650ma AC. The phone will recognize if its USB or ac and allow it to charge according to that. Its not going to charge faster on a 1a charger unless you root your phone and hack those parameters. Doing that is what will cause battery life problems, if not cause a complete failure of the battery and/or the device.. The higher you you set the charging amperage, the more likely you are to have problems.
And phones now (especially any model of GS2) have circuitry to prevent overcharging. Leaving your phone charging overnight is not going to cause any problems.
I don't know if USB wall outlets act like USB or a/c (think about a USB cable with a wall adapter) but plugging into the USB outlet and checking in the battery info in the settings menu or a battery app can tell you.
Sent from my SGH-I777
What's next wireless charger outlets?
Get the higher-amperage Leviton.
Your device will only draw the amps it needs. The GS2 will draw < 1amp. But if you have a big tablet, they can pull the full 2.1 amps.
Since you're doing a 'permanent' wall installation, you're somewhat future-proofing yourself.
Good info, thanks all. I did not know that our phone will only pull the amps it needs, so that is good to know. I may get the higher amp version because I have a Galaxy Tab 10.1 that needs higher amperage.
i.Sound Portable Charger
Has 16,000 mah
Input: 12V 1A
Output: '5V 2.1A on each connector 2.5 A together'
I charge a number of things on here...
A friend has me a bit confused saying this could damage the charging mechanisms of the phone.
Any input please?
Thanks
rockky said:
i.Sound Portable Charger
Has 16,000 mah
Input: 12V 1A
Output: '5V 2.1A on each connector 2.5 A together'
I charge a number of things on here...
A friend has me a bit confused saying this could damage the charging mechanisms of the phone.
Any input please?
Thanks
Click to expand...
Click to collapse
Do u mean, you are giving the Galaxy Note an input of 5V, 2.1A (ie, output of Portable Charger)? if so, it is going to effect the battery life in long run..it may charge your phone faster, but definitely going to hurt the life of the battery..there are a lot of factors which should be considered like how much extra current you can give, temperature etc etc..
I don't think so: charging current is controlled by the device being charged, not the charger.
The Note will draw only ~700mA on an "AC" charger, even if that charger can supply up to 1A, 2A, etc.
On USB, it will draw ~500mA.
A mains/AC charger shorts the 2 data pins, which tells the phone that it's a dumb charger, not a USB host, and it is safe for the device to draw up to its own maximum (700mA for the Note).
---------- Post added at 12:23 AM ---------- Previous post was at 12:16 AM ----------
The corollary to that is that you shouldn't be able to shorten battery life by over-current charging: even with a 2A Nexus charger the Note draws only up to its maximum 700mA.
[I did just that test a moment ago to check: 725mA, on the 2A Nexus 7 charger]
Of course, 700mA is more than the 500mA it will draw from a USB host, so if you were really concerned, you could use that.
But the device ships with a mains/AC charger from which it will draw 700mA, so you're never going to exceed the "official" charger, whatever charging source you use.
cdmackay said:
I don't think so: charging current is controlled by the device being charged, not the charger.
The Note will draw only ~700mA on an "AC" charger, even if that charger can supply up to 1A, 2A, etc.
On USB, it will draw ~500mA.
A mains/AC charger shorts the 2 data pins, which tells the phone that it's a dumb charger, not a USB host, and it is safe for the device to draw up to its own maximum (700mA for the Note).
---------- Post added at 12:23 AM ---------- Previous post was at 12:16 AM ----------
The corollary to that is that you shouldn't be able to shorten battery life by over-current charging: even with a 2A Nexus charger the Note draws only up to its maximum 700mA.
[I did just that test a moment ago to check: 725mA, on the 2A Nexus 7 charger]
Of course, 700mA is more than the 500mA it will draw from a USB host, so if you were really concerned, you could use that.
But the device ships with a mains/AC charger from which it will draw 700mA, so you're never going to exceed the "official" charger, whatever charging source you use.
Click to expand...
Click to collapse
yes, though AFAIK the Note will draw more than 700mA from the OEM charger
and I have noticed charging speed differences by using different aftermarket chargers... never put a multimeter to them though
while charging the battery in the note is safe, I don't recommend plugging in your portable charger into a external battery charger. They may not protect the battery from overcurrent. Pay attention to all the specifications of all charging devices you use. Especially if you also have an aftermarket battery.
Cheers
Sent from my GT-N7000
guitarplayerone said:
yes, though AFAIK the Note will draw more than 700mA from the OEM charger
Click to expand...
Click to collapse
Are you sure? I didn't think that was the case; I could be wrong of course.
do you have any more details on that, please?
I have used many, many USB chargers: mains/AC, 12V, solar, portable battery, and never seen greater than ~700mA being drawn by the Note.
I'd like to know otherwise, for the odd occasion when i might want a really quick charge!
My friends point was that the i-sound charger would hurt not so much the battery but might damage the charging circuitry in the phone...course I learn this after buying this charger! ( I know its fine for nexus 7 and 10.1 tab).
Again its
Input: 12V 1A
Output: '5V 2.1A on each connector 2.5 A together'
rockky said:
My friends point was that the i-sound charger would hurt not so much the battery but might charging circuitry in the phone...course Ilearn this after buying this charger! ( I know its fine for nexus 7 and 10.1 tab).
Again its
Input: 12V 1A
Output: '5V 2.1A on each connector 2.5 A together'
Click to expand...
Click to collapse
Yup, and I believe the answer is no: you cannot damage the Note's charging circuit by using a charger that has a higher *maximum* current, since the Note will only draw a current of (approx) 700mA regardless of the charger's maximum.
As an example of that, my test showing that the Note still only draws 725mA when connect to the Nexus 7 charger, which has a maximum charging current of 2A.
Thanks
cdmackay said:
Yup, and I believe the answer is no: you cannot damage the Note's charging circuit by using a charger that has a higher *maximum* current, since the Note will only draw a current of (approx) 700mA regardless of the charger's maximum.
As an example of that, my test showing that the Note still only draws 725mA when connect to the Nexus 7 charger, which has a maximum charging current of 2A.
Click to expand...
Click to collapse
There was a mid on this site a really long time ago showing how shorting a specific connection in the usb cable will enable ac mode and this is supposedly what the oem charger does
guitarplayerone said:
There was a mid on this site a really long time ago showing how shorting a specific connection in the usb cable will enable ac mode and this is supposedly what the oem charger does
Click to expand...
Click to collapse
yup, that's right: shorting the two data pins --- which most "dumb-charger spec" capable chargers do --- tells the Note that it's OK to pull its maximum ~700mA. But it won't pull any more than that even if it's a 2A charger.
Without that short, the Note will only pull the regular ~500mA (again, regardless of charger max current): it thinks it is connected to a standard USB host, which might not be able to supply > 500mA, e.g. a laptop motherboard.
If you have a >500mA charger that *doesn't* follow the dumb-charger spec, i.e. it doesn't short the data pins, e.g. possibly a Mac USB charger, then you can get a charge-only no-data USB cable, that has the data pins shorted internally (in the cable itself), which will achieve the same effect. This is the mod you describe above.
You probably should not use that cable with a regular USB host (although the host will probably just limit its current anyway).
[Macs use some proprietary "signalling" method, whereby differing value resistors are placed across the data pins, telling the device differing levels of current to pull, etc. This is why you'll see external battery packs like Anker Astro 3 having a "Samsung port" and also a "iPad port"; madness]
Finally, some Android kernels have a hack that will allow AC mode (e.g. 700mA on the Note) regardless of the data pins. But this isn't always wise, and so many devs won't touch it. It prob wouldn't bother the Note, but it might not be good for the host/charger.
Apologies for rambling on, but people seem to ask this sort of thing a lot...
yep people wantblong battery life and fast charge.
About time a proper fuel cell is introduced
Sent from my GT-N7000 using Tapatalk 2
Most of this is over my head
So bottom line: charging my note with the i-Sound charger described in the OP will NOT damage my new Note , correct?
Tnx
rockky said:
Most of this is over my head
So bottom line: charging my note with the i-Sound charger described in the OP will NOT damage my new Note , correct?
Tnx
Click to expand...
Click to collapse
I believe that's correct; I would not hesitate to use it.
As someone else stated, however: whilst charging in the phone should be safe, since the phone controls the current, taking the battery out and charging it in a standalone battery charger may not be safe.
rockky said:
Most of this is over my head
So bottom line: charging my note with the i-Sound charger described in the OP will NOT damage my new Note , correct?
Tnx
Click to expand...
Click to collapse
Yes, that's correct. Generally, just make sure the voltage is not too high (or too low). The range of 4.7V to 5V should be OK, since there is some allowance for variations. The current ( ie, the Amperes) only indicates the current the charger is capable of supplying. It doesn't mean the charger will force all that current down the battery's throat. The device/battery will draw as much as it needs, and this will not damage the device or battery whether it's 0.5A or 2A.
I have the Tab S 10.5 SM-T800. I've called tech support about battery rapid discharge issues. The tech said use only the Samsung charger and cord supplied and only plugged in directly to a wall outlet.
Very short cord, and being that close to an outlet ain't exactly "convenient".
What was really bizarre though was his statement that using a non Samsung Tab S cord would cause the tablet to treat a full charge differently and result in a faster discharge!
This is either just Tech Support nonsense or if true malicious design.
Please advise.
Thanks in advance.
Richard
LEADER99 said:
I have the Tab S 10.5 SM-T800. I've called tech support about battery rapid discharge issues. The tech said use only the Samsung charger and cord supplied and only plugged in directly to a wall outlet.
Very short cord, and being that close to an outlet ain't exactly "convenient".
What was really bizarre though was his statement that using a non Samsung Tab S cord would cause the tablet to treat a full charge differently and result in a faster discharge!
This is either just Tech Support nonsense or if true malicious design.
Please advise.
Thanks in advance.
Richard
Click to expand...
Click to collapse
Just nonsense.
I have an solar AA to USB charger £89 so not cheap, I was reading the manual and it said that when charging some phones the battery power might be discharged from the phone rather than being charged, which seems kind of strange.
It may indicate using an non oem charger can result in the battery being discharged instead of being charged, so the Tech Support may not be so stupid after all.
I have heard people mention this happening over the years, a device discharging when it should be charging.
So use the oem charger and cable, or use an app like galaxy charging current, so you can tell what ma the third-part charger is charging your tablet/phone or not as the case may be.
On the use an ac mains socket and not an ac mains extension, as the phone/tablet uses so little power i cannot see even an extreme cable lenth making that much difference.
Though using long usb dc charging cable can reduce the charging speed a bit.
John.
Over the years I have used all sorts of chargers for various devices without issue.
As long as the charger can supply the correct voltage and current there is no reason why it can't be used.
I plug my devices in to whatever charger I have to hand.
Micro USB is a standard, so any device using this standard should be compatible.
Manufacturers will always encourage you to use their own products as these have been tested and guaranteed to work.
If you use 3rd party equipment then it's buyer beware, just be sensible with what you use.
Hi,
When I plug in a Galaxy S4 (jfltexx) to the USB port of my computer, it charges only with 440mA.
Other USB devices can charge with 1.1A on the same USB port.
The S4 would be able to charge with higher current though, on a dedicated charger it charges with ~1.8A (using the same cable). What could be the reason that it charges only with 440mA on the USB port? Can this be changed?
Charging technology is a bit convoluted - both ends must talk to each other and agree on something:
Charger compatibility
OnePlus 6t charges at 3A with the charger that came along with it. If I use my laptop charger, it charges at 1A. It's a 160W usb-c charger. Is there any specifications that I need to check before buying a charger that will give best performance?.
forum.xda-developers.com
If they don't, then it falls back to the lowest.
Perhaps you find some solution in a more appropriate S4 thread, like this:
Findings on Galaxy S4 charging current
With the advent of the S4, and its higher capacity battery, one could understand a higher charging current. However, I seem to have uncovered some findings that the charging system on the S4 is a bit more complex than first thought! This is a bit...
forum.xda-developers.com