[Q] Voltage on unofficial micro USB charger - Galaxy S I9000 Accessories

My GF ran over my mains charger cable with the vacum cleanerr at the weekend, so i ordered i new one from Ebay. Rather stupidly (as an "official" one would only be £1 more), i bought this unbranded one:
UK MAINS CHARGER FOR SAMSUNG i5700 i9000 GALAXY S on eBay (end time 02-Apr-11 14:51:41 BST)
When it arrived i noticed that the output is different: 5.5v 500ma as opposed to 5v 700ma from the one that came with the phone.
I know tha ampage will affect charging speed, but am concerned about the extra 0.5 voltage. Is this safe to use?

I'm curious about this too... I thought the "U" in USB meant Universal.
I just ordered 2 micro USB chargers from Ebay for my GF's Sony Vivaz Pro and my Captivate... neither work.
Her's doesn't recognize the charger at all... mine beeps and says "charging", but the battery level never goes up.
My chargers are 5v 500mA.
The chargers were listed as Blackberry chargers, but had a long list of compatible phones underneath (none matched our phones, to be fair.)
Now I'm afraid to buy any more generic chargers....

I don't know if the output voltage is part of the USB standard or not. I know that computers output 5v and it seems like a lot of phone chargers also do. However, i've seen some external battery chargers listed as compatible with the SGS listed as 5.2v, so maybe theres an accepted voltage range? Does anyone know for sure if a 5.5v is acceptable?
I'm not sure why the ones you have don't work as the specs seem right,possibly they are faulty?

paddyb said:
I don't know if the output voltage is part of the USB standard or not. I know that computers output 5v and it seems like a lot of phone chargers also do. However, i've seen some external battery chargers listed as compatible with the SGS listed as 5.2v, so maybe theres an accepted voltage range? Does anyone know for sure if a 5.5v is acceptable?
I'm not sure why the ones you have don't work as the specs seem right,possibly they are faulty?
Click to expand...
Click to collapse
Yeah, I'm not sure. I certainly thought so, even though it seemed pretty "unlucky" they both might be faulty.
I did ask the seller, and they claim they are NOT compatible with my phones, but I just don't get it. They're offering me a refund, but at $4 each it's hardly worth my time mailing them.
I found some forums online of a small handful of people like me with chargers that won't work. It seems people with this issue were using 500mA chargers, and anyone using a 700 or 1000 had no problems. This wasn't necessarily because all phones either require 500 or 1000.... Someone also said it's only very certain phones that are built this way. That they require newer, or more powerful chargers... but that it's not the case with all new phones/smartphones.
But there were others who said 500 should charge it, just more slowly.
I still think Micro usb is Micro usb, period. That's why the EU (and here) have been looking at making these chargers universal. I think I'll just try my luck again with another charger.

You could try this one, which claims to be (and looks like), an official SGS charger:
http://cgi.ebay.co.uk/Samsung-i9000...ories_MobilePhoneChargers&hash=item2c5b2d355a

5.5V is supported. I've tested a very wide range of chargers for my SGS and all worked.
The voltage range of these chargers is 4.8V - 5.6V and all worked just fine.

I've actually got an original Nokia USB charger which is declared at 5.0v/550mA and it works like a charm...
Model is AC-6E:
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Well finally decided to give the ebay charger a go. Plugged it in, a green light lit up and plugged the phone in. The phone didn't recognise the charger, no indication the the notification bar that the battery was charging. Unplugged it and and tried again, and now the light on the charger doesn't even come on! Won't be using it again.

Another question on the topic : Is it save to use charger with higher Amperage ?
I mean original samsung one is 0.7A, could something go wrong if I´ll use 1.0A charger? Thanks
EDIT : Answer no needed anymore - found it in another topic. It should be safe

I believe any microUSB charger will be safe. Ideally, you want the highest voltage and highest current possible.
I've heard that the phone will use the data lines to tell the USB charger what voltage to set. This ensures voltage compatibility. Then the phone itself regulates the current.. it will only draw as many amps as it needs. So if the PSU can handle 2A, your device may only draw 0.725a for example, but it's safe. You want a high current one to ensure the phone has all it can take.
BTW, I'm not an EE person, so double check what I said.

I fear it's not that simple, especially with dumb chargers that can't negotiate current using the USB protocol, and instead may short the data lines, in various ways, instead to tell the device what current to draw...
Sent from my GT-I9000 using xda premium

There's an explanation here of why different chargers do indeed make a difference:
http://en.wikipedia.org/wiki/Usb#Power
see in particular the note on the Battery Charger Spec.
In particular. my own testing shows I can go from 500ma to 700mA charging current simply by changing a small connector in line between the 7Ahr battery I'm using to charge the phone, and the phone. That's due to the nature of the short on the data pins.
There are proprietary tweaks to this mechanism; e.g. iPhones use voltage signalling between the two data lines and ground to indicate various things to the device.
All of this is only for "hosts", i.e. chargers etc, that don't implement the USB protocol and so can't engage in the normal current negotation that occurs when connecting e.g. the device to a PC.

Would i **** it up pluging a 5.8 volts solar charger on my phone?

projeto56 said:
Would i **** it up pluging a 5.8 volts solar charger on my phone?
Click to expand...
Click to collapse
It's a bit too high.
You have to know that slow charge = long battery life and fast charge = more battery drain after a couple of years maybe months

HdX75 said:
It's a bit too high.
You have to know that slow charge = long battery life and fast charge = more battery drain after a couple of years maybe months
Click to expand...
Click to collapse
So usb charging is better then wall charging with original charger? because i noticed that my phone hold it`s charge better if i use the wall charger.

Pezmet said:
So usb charging is better then wall charging with original charger? because i noticed that my phone hold it`s charge better if i use the wall charger.
Click to expand...
Click to collapse
Maybe because the current is higher. My battery voltage is arround 4200mV at 100% and 4100mV with USB
For the solar charger 5.8 is really high but the wall charger is ok

guys can anyone tell me what would be the reason that my Samsung j7 prime charger is giving me 4.63v instead of 5v .. the rating is 5v on the charger. is that possible the ic or some other thing is damaged? in that case what would be solution?

Related

[Q] Has anyone tried using the iPHONE USB Charing Block?

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It is rated at 1amp. I'm wondering if the Captivate allows us to actually charge the whole 1AMP or if it charges only .7Amps as a limit. Does anyone know?
If not, is there a application I can check the charge rate to let you guys know?
It works, as does my Moto 850ma block. Not sure if it is faster though.
alphadog00 said:
It works, as does my Moto 850ma block. Not sure if it is faster though.
Click to expand...
Click to collapse
Yeah, I'm curious to know because my phone thinks it's connected to a PC and mounts my SD cards!
So it's thinking it's charging USB when it should be AC power...
Is there any way for us to monitor the Amps?
SlimJ87D said:
Yeah, I'm curious to know because my phone thinks it's connected to a PC and mounts my SD cards!
So it's thinking it's charging USB when it should be AC power...
Is there any way for us to monitor the Amps?
Click to expand...
Click to collapse
same here , i dint realise that until i saw your post was wondering why it was doing that duh!!
yeah same thing hapens to me lol, does it rly matter if its charging USB power vs AC power?
SlimJ87D said:
Yeah, I'm curious to know because my phone thinks it's connected to a PC and mounts my SD cards!
So it's thinking it's charging USB when it should be AC power...
Is there any way for us to monitor the Amps?
Click to expand...
Click to collapse
this has been the only problem i've had as well. happens with a power strip i use that has usb ports to charge as well. very weird.
I just watched a video on hacking a self-built battery charger - the mintyUSB one where you use an Altoids Tin. It has a USB female port and hold 2 AA batteries. Well, they just put out a new way so it charges an iPhone. What apple does is put voltage on the 2 data lines and the phone detects this and thinks it a USB port. Most chargers don't put any current on these lines.
If it thinks it is on a USB port, it will draw a lower current.
so having a lower current just prolongs the charging process correct?
SiL3nTKiLL said:
so having a lower current just prolongs the charging process correct?
Click to expand...
Click to collapse
Correct. But next time you have some spare time, try connecting your phone to a USB port and seeing how long it takes to charge.
It took my phone over an hour to go up three percent.
I've used the iPhone charger with the Captivate and it really doesn't charge any faster and honestly seems slower, it also really heats up the phone a lot more than the stock charger does.
When I plug the phone into my computer, it tells me it's only using 96mA (device manager) and charges faster than the iPhone charger does...
Well there we have it guys!
The iPhone charger is a no no! Because of those stupid pins...
I have a Mini USB charger that does 1AMP, I'm just going to buy a Micro USB to Mini USB adapter.
I use mine all the time. No problems.
Sent from my SAMSUNG-SGH-I897 using XDA App
ive been using the apple charging block and it seems to charge a bit faster
If you look closely on the AC plugin side of the iphone plug you will see it says it outputs 5V at 1A (1000mA). If you do some searching online for wall chargers you will see that the outputs for chargers range from DC 4.5V-9.5V at Max 800mA-1A. The iPhone charger should be fine with the captivate. I have been using the iPhone charging block for my phone and haven't had any problems.
i experienced a little problem where upon use of the apple charger, my phone would act like it was charging OVER USB.
you can verify how its charging by going into settings > about phone. on the normal samsung charger (.7A), it'll say "charging AC", however use of the apple charger prompted the phone to say "charging USB". in fact, i could even bring up the prompt to "mount" my sd card (even though its plugged into the wall).
not sure if the prob was just limited to me or to everyone
I get the same popup but it still charges...I don't think it hurts anything. The phone is just confused.
In the past, a lot of smartphones will fail to charge the battery on USB mode if the battery is critically low (< 20%) because they need > 500ma to initiate the charge process in that situation. So, even though your phone can still get trickle charges from USB mode, it won't charge at all when you really need it. Not sure if it is still true for Captivate. Make sure you test it out before you leave home without the stock AC adapter.
well the type of charging that the phone thinks its on versus how you're actually doing it could play a difference. if i recall usb can only charge maximum .5A, while on AC it can go up to 1A or higher. So if the phone thinks its on USB, it may artificially limit the charge so it takes even longer.
I just decided to go back to the regular samsung charger, it seemed a tiny bit faster. still dont understand why samsung didn't give us a 1A charger
littleasian said:
well the type of charging that the phone thinks its on versus how you're actually doing it could play a difference. if i recall usb can only charge maximum .5A, while on AC it can go up to 1A or higher. So if the phone thinks its on USB, it may artificially limit the charge so it takes even longer.
I just decided to go back to the regular samsung charger, it seemed a tiny bit faster. still dont understand why samsung didn't give us a 1A charger
Click to expand...
Click to collapse
Yes, the USB standard provides 500mA per port, but most charging ports short the data +/- pins which allows the device to enter dedicated charging port mode. This can allow for up to 1.8A, though most are capped at somewhere around half of that.
If the D+/- pins are not shorted the device will assume a data connection and will default to 500mA for charging. This could also be why some people are seeing that their phone will display options to mount drives when plugged into charger.
Battlehymn said:
Yes, the USB standard provides 500mA per port, but most charging ports short the data +/- pins which allows the device to enter dedicated charging port mode. This can allow for up to 1.8A, though most are capped at somewhere around half of that.
If the D+/- pins are not shorted the device will assume a data connection and will default to 500mA for charging. This could also be why some people are seeing that their phone will display options to mount drives when plugged into charger.
Click to expand...
Click to collapse
This is actually very insightful and makes perfect sense. Because Apple uses resistors to set voltages across D+/- pins, the phone won't recognize the wall charger as what it is and will only pull the 500mA that it thinks the "USB port" can provide.

[Q] Working replacement charger (normal or car) for Galaxy S with more than 500mA?

Does anybody know a really working replacement charger for the Galaxy S?
I have tried different models but all are not recognized as original charger so the Galaxy is only charging with 500mA.
The Galaxy S does somehow check if it is an original charger and only than switches into charging mode.
You can easily verify this. Just connect your phone with the charger, open the task list. If you see the USB choices menu the phone is in PC mode and only charges with 500mA.
2000 mAh (2A) charger
http://www.dealextreme.com/details.dx/sku.25177
this if you like windshield mount
http://www.dealextreme.com/details.dx/sku.42602
or this if you like air vent mount (i tilt it horizontally, it's more secure and works better with SGS)
http://www.dealextreme.com/details.dx/sku.37823
it actually can use both, vent and/or windshield
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So you use this charger and it switches the SGS to charging mode. That is good news. All chargers I tried only charged with 500mA alltough they were stated with 2000mA or 1200mA.
How long does it take to fully charge the SGS?
that's the one i use in my car, charging varies depending on use
on short drives it will keep your battery from draing (unlike the 500mAh ones)
on long drives like at least an hour or two can charge a few bars meanwhile keeping GPS on, Bluetooth On, 3G/H data On, Screen On
on long road trips the battery will be fully charged.
but if you were using a 500mAh your battery will be completely sucked dry, on 1000mAh it can keep everything running, but battery might not be at full
Does anyone know why the standard Samsung charger outputs so low? :S
I'm just wondering if they did that for a reason like the phone can't handle too much power
it's rather cost cutting, all phone chargers i've ever had from included items were always around 500mAh
The mains charger I use seems to work the same as my official one
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=300435855427
My car charger comes up with pc mode though which as you say probably means it isn't charging properly (I notice that the charge is about the same when I finish my journey as when I started if I use gps)
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=370391436219
Is there a way to tell how well it is charging? I'm guessing if it thinks it is connecting to pc then it won't charge properly
you can use a battery app to monitor the mAh in the battery
if it charges as you consume, then the mAh should keep going up
but if the mAh keeps going down, then the charger is obviously not providing enough power
badasschris said:
The mains charger I use seems to work the same as my official one
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=300435855427
Click to expand...
Click to collapse
Thanks for the info.
What are the specifications of this charger (how many mA)?
badasschris said:
Is there a way to tell how well it is charging? I'm guessing if it thinks it is connecting to pc then it won't charge properly
Click to expand...
Click to collapse
Unfortunately not really.
There is an widget (http://forum.xda-developers.com/showthread.php?t=723217), but it is not working for the Galaxy.
yes can someone post a decent charger and car charger (preferably on ebay) that charges at a faster rate, the supplied usb cable takes forever to charge my i9000!
I use a mUSB car charger made by Rocketfish (Best Buy brand). Works well, doesn't show "USB Plugged". Was charging pretty quickly even though I had GPS on and Navigation running, which drains battery pretty quickly normally.
TDO said:
Does anybody know a really working replacement charger for the Galaxy S?
I have tried different models but all are not recognized as original charger so the Galaxy is only charging with 500mA.
The Galaxy S does somehow check if it is an original charger and only than switches into charging mode.
You can easily verify this. Just connect your phone with the charger, open the task list. If you see the USB choices menu the phone is in PC mode and only charges with 500mA.
Click to expand...
Click to collapse
I'm using the original charger on a US Vibrant (700mA) and I can still see the USB choices menu.
Is there any other way to check on how much current the Vibrant is using to charge? I have a 1A car and wall charger, but there is no way to tell if they are using 1A or not.
i'm using a max output:1.0A charger works fine. It is a power supply from my old phone which is an adapter with a USB port so i just plugin the galaxy's usb cable and charging happens very fast.
tommy34 said:
i'm using a max output:1.0A charger works fine. It is a power supply from my old phone which is an adapter with a USB port so i just plugin the galaxy's usb cable and charging happens very fast.
Click to expand...
Click to collapse
Did you try this in your car with the screen on full brightness and running GPS software? Important to note because all of these chargers work fine when the phone is sleeping or even idling, but when you throw in full screen brightness, tax the cpu/gpu with software, and use the GPS and radios for triangulation for location data, thats when the power consumption overwhelms the charger.
There's some good information on measuring amperage usage of different chargers in this thread in the Vibrant forum:
http://forum.xda-developers.com/showpost.php?p=7704900&postcount=15
Apparently you can read the current charge your phone is pulling by going to this file on your phone:
/sys/class/power_supply/battery/batt_chg_current
So under the same load conditions (screen brightness, GPS enabled, GPS software running, approximately battery charge level) you should be able to compare how much amperage the phone is able to pull on any given charger.
AllGamer said:
that's the one i use in my car, charging varies depending on use
on short drives it will keep your battery from draing (unlike the 500mAh ones)
on long drives like at least an hour or two can charge a few bars meanwhile keeping GPS on, Bluetooth On, 3G/H data On, Screen On
on long road trips the battery will be fully charged.
but if you were using a 500mAh your battery will be completely sucked dry, on 1000mAh it can keep everything running, but battery might not be at full
Click to expand...
Click to collapse
So is this with the 2000mah charger you linked?:
http://www.dealextreme.com/details.dx/sku.25177
Could you give us some measured numbers, that would be so helpful!
Does anyone know if our phones will stop charging when the battery is full? Do we need chargers with IC chips or will the phone take care of it? I mentioned this in the vibrant forum, but my old dumphones required smart chargers as dumb quick chargers would keep charging away killing the battery, but my Dell Axim PDA was smart enough to shut off charging when full itself.
I'm thinking of getting the 2000mah charger linked previously, but I'm concerned because I haven't been able to determine if it has an IC chip in it, but I don't know if we even need that with our phones.
If we need smart chargers im considering this:
http://www.dealextreme.com/details.dx/sku.40470
Someone in the reviews measured it at 1.1amps and noted it has a decent IC chip.
Android automatically stops charging if it THINKS the batter is full
see this topic
http://forum.xda-developers.com/showthread.php?t=722862
it's more of a nuisance than a good safety feature
also in another topic we found that if your phone is bricked, it will not charge the battery, because there is no OS to handle the charging.
AllGamer said:
Android automatically stops charging if it THINKS the batter is full
see this topic
http://forum.xda-developers.com/showthread.php?t=722862
it's more of a nuisance than a good safety feature
also in another topic we found that if your phone is bricked, it will not charge the battery, because there is no OS to handle the charging.
Click to expand...
Click to collapse
Thanks! Looks like the phone regulates charging itself, and works well enough so long as it doesnt get out of calibration (by you flashing the phone when not at 100% =D) Do you happen to know if it will continue to regulate and stop charging even when the phone is completely turned off? I guess the question is if the android system in charge of this still runs when the main OS is turned off.
Otherwise, for the purposes of our thread, looks like using a 2000mah quick car charger without a verified IC chip should be fine!
As far as i know the 2000mAh charger that I'm using has a build in IC chip (most car chargers now in day has one) as well, but it's hard to tell, unless we can remove the auto safety feature of Android in the SGS.
AllGamer said:
As far as i know the 2000mAh charger that I'm using has a build in IC chip (most car chargers now in day has one) as well, but it's hard to tell, unless we can remove the auto safety feature of Android in the SGS.
Click to expand...
Click to collapse
well you could crack it open and see whats inside =P but I don't that is necessary since we're covered either way, our phones can regulate the charge regardless.
Thanks!
btw i would still LOVE it if you had a chance to see what value you see in /sys/class/power_supply/battery/batt_chg_current when using the 2000 mah charger.

5v 1000mA charger

Would it be safe to charge the batter at 1000mA compared to the stock 700mA the charger provides?
yes, i do it all the time
I use the charger from the Galaxy Tab all the time, it's rated at 2A and the S does see it as a proper charger. I've not checked, but I also think it charges the phone faster than the stock charger.
terje.tel said:
I use the charger from the Galaxy Tab all the time, it's rated at 2A and the S does see it as a proper charger. I've not checked, but I also think it charges the phone faster than the stock charger.
Click to expand...
Click to collapse
yes it does
the higher the Amp, the faster it charges
however this is not compatible with all phones
the SGS is a good phone, my Motorola will not charge if you exceed or you are under the original charger spec (which is totally stupid) but i understand it is to protect the phone, from over heating
SNS also accepts higher output chargers
So can I use this ?
actually it is ipad charger, 5.1V 2.1A output.
On the phnoe label it is printed max~1000mA
but this is 2.1A.....(2100mA)
it seems too high...
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The battery might heat up to a high temp and if done regularly it could very well shorten the life span significantly.. the stock 700mA charger makes the battery warm, Im guessing that 2100mA will make it very hot, but you can try for like 30mins of charging see if thats the case.. if you can just say its warm then I would presume its safe.
700 to 1000mA charging has very little difference on the warmth that i feel from the battery.
If you have the International Galaxy S GT-I9000 it won't charge any faster than about 450mA regardless of the charger rating (from my tests). You can get a higher-capacity charger but it won't make any difference and is quite safe so long as the voltage is correct.
TheBeano said:
If you have the International Galaxy S GT-I9000 it won't charge any faster than about 450mA regardless of the charger rating (from my tests). You can get a higher-capacity charger but it won't make any difference and is quite safe so long as the voltage is correct.
Click to expand...
Click to collapse
The International Galaxy S I have comes with a 700mA charger though, there is a noticeable charge difference between a USB port (500mA) vs the stock charger (700mA) and my 1000mA charger
If 2100mA is also supported, the charge time will become in just 43min (in theory).
And if the charge circuit is safe enough, it will control the current to 700~1000mA, and it will drive below 200mA in the beginning of charge.
Just try plugged to my phone, it is charging as USB not AC,
so I think the currect will limit to 500mA.....
will try again later, my battery is still full now.
If theres a 500mA limit why do I get faster charging speeds with the wall charger compared to the USB ?
EarlZ said:
If theres a 500mA limit why do I get faster charging speeds with the wall charger compared to the USB ?
Click to expand...
Click to collapse
That's the question..
I'm using data cable, so the phone just detect plugged to USB i/o AC power.
maybe I need to use straight miniusb power cord.
Then it will really challenge the phone in 2.1A
On the other hand, IP4 & Ipad can draw 1A from computer USB, (need new motherboard)
what about Galaxy S !?
I will test it later.
terje.tel said:
I use the charger from the Galaxy Tab all the time, it's rated at 2A and the S does see it as a proper charger. I've not checked, but I also think it charges the phone faster than the stock charger.
Click to expand...
Click to collapse
If the charge time is less than one hour,
you are getting benefit of high current.
johan8 said:
That's the question..
I'm using data cable, so the phone just detect plugged to USB i/o AC power.
maybe I need to use straight miniusb power cord.
Then it will really challenge the phone in 2.1A
On the other hand, IP4 & Ipad can draw 1A from computer USB, (need new motherboard)
what about Galaxy S !?
I will test it later.
Click to expand...
Click to collapse
Im not 100% sure but the USB 2.0 specification is 500mA only.
EarlZ said:
Im not 100% sure but the USB 2.0 specification is 500mA only.
Click to expand...
Click to collapse
Yes I know.
But IP4 and Ipad is also USB2.0
johan8 said:
Yes I know.
But IP4 and Ipad is also USB2.0
Click to expand...
Click to collapse
In relation to what you said that IP4 and IPxD can draw 1A, thats why I said the USB 2.0 spec is only 500mA so those devices cant draw more than 500mA on a USB port.
EarlZ said:
In relation to what you said that IP4 and IPxD can draw 1A, thats why I said the USB 2.0 spec is only 500mA so those devices cant draw more than 500mA on a USB port.
Click to expand...
Click to collapse
IP4 is USB2.0 Device,
plug into high power USB port (that is USB3.0 port)
USB2.0 IP4 can draw over 500mA
I know what you mean, if the source is USB2.0 of course you can't draw higher than 500mA.
My point is, if the device can draw higher than 500mA, just like the usb2.0 IP4,
and if galaxy s can draw that high,
then we can get benefit from the high output usb ports and also that high output usb charger.
Hello everybody,
I want to share my experience.
So I have a Samsung galaxy S, and usually I charged it with the original charger (700mA).
I tried with a 1000mA one. The charger was really faster than with the original one. So I thought that if I buy the galaxy tab's charger (2000mA) it would be faster.
It's what I did. But the problem is that it's not faster with this one than with the 1000mA one.
I think the problem comes from the USB limit of charge (1000mA in a outlet, 500mA on a USB port from a computer).
But I have a problem with this... I mean, the galaxy tab is charged by an USB cable too, even if it's not the same plug out (I don't know the name of this plug out, I know on the galaxy S it's a micro-USB) on the cable, it's still an USB cable. So why this USB cable can give 2000mA while it uses an USB technology ?
it's definitely faster charging on a 1200 nokia charger..
Sent from my GT-I9000 using XDA App
I can't help myself and I must tell you guys something. The mA of a charger means how much current it can provide in 1 hour, imagine it like a pipe through which only a ammount of watter can pass. Now going back to the phone... We have a 1500mA batt which means that if we use a 25000mA charger it will only output 1500mA... So it is useless to use a more powerfull charger than 1500mA. I hope you understand what I said
That is a 1500mA*h* battery which means capacity and not current.
Sent from my GT-I9000 using XDA App

Fast Charging "Homemade". What are the risks?

I lost my original Fast Charger in my school and now I'm without one. The problem is, that sometimes I need that great feature.
My question is, can I disassembly a random 9V charger and "adapt" a Micro-USB cable to it? Since the GS6 supports 9V I don't see a problem there. Or must I short some data pins in order to enable fast charging to not fry the device?
Why don't you just buy a new one?
I definitely think that's not a good idea. Buy a new one. If you are worried about Samsung charger price you can buy a cheaper charger that support Qualcomm 2.0 quickcharge, it's compatible.
I thought the whole thing was dynamic, that at lower battery levels it charges at different amperage than higher levels, and at a certain point it kicks over to 5V. It doesn't charge at 9V the whole time.
Sent from my SAMSUNG-SM-G920A using XDA Free mobile app
@quarlow is right, it's dynamic.
You should buy a new one, much more safe.
If I plug a normal 'old' 600mA 5V charger to it, it says that it will charge in 6 HOURS! I can't wait for that.
I have disassembled the charger, unsolded the Female USB plug and solded it to an 9V charger from an TP-Link Switch.
I plugged it in and the phone started charging. It says "Cable charging" instead of "Fast charging" and it stated 6 hours too. After that, I shorted the data pins and then the time reduced to 2 hours...
I also tried a 12V charger (1.5A), but it don't charged, nor maked any charging sound.
Now I concluded two things:
1. Samsung S6 phones are very robust with charger voltages :silly:
2. It isn't that easy to make a fast charger.
I hope I have saved some questions now
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Thanks for all the replies, but now I haven't money to buy one. Where I live, they are really expensive!
Oh, aaand, I don't know if it's a good idea to charge at 9V the whole time, because when it reaches 100%, I hear constantly the charging sound.
Looking at a Samsung Travel Adapter change...
https://www.dropbox.com/s/54xt2u315nn1tkt/2015-09-27 14.04.18-1.jpg?dl=0
Output is: 9v at 1.67A, or 5v at 2.0A. It's listed as an adaptive charger.
numloxx1978 said:
Output is: 9v at 1.67A
Click to expand...
Click to collapse
Thanks, I will search for an 9V charger that has this amperage.
Btw, some chargers have adaptive 12V output.... Is that QuickCharge 3.0?
A normal Samsung or LG charger of 1.8A/2A output still charge my S6 in about 1.5 hours. Get one from a relative or friend or buy one if the S6 charger is too costly
Fullmetal Jun said:
Get one from a relative or friend or buy one if the S6 charger is too costly
Click to expand...
Click to collapse
I tried already. These options are not available
:silly:
Info
Fusseldieb said:
I lost my original Fast Charger in my school and now I'm without one. The problem is, that sometimes I need that great feature.
My question is, can I disassembly a random 9V charger and "adapt" a Micro-USB cable to it? Since the GS6 supports 9V I don't see a problem there. Or must I short some data pins in order to enable fast charging to not fry the device?
Click to expand...
Click to collapse
the factory charger got in fire sometimes i don know abt home-made chargers... take care dude
You gotta be kidding. Spend $10 and get a QuickCharge 2.0 adapter.
Don't risk it. Samsung Fast Charge is the same thing as Qualcomm Quick Charge. It's Qualcomm's technology, licensed with no loyalty fee.
QuickCharge 2.0 uses the data pins to negotiate the charge voltage with your power adapter. Otherwise it just uses 5V.
I see on my S6 it stays at 9V all the time. The phone pulls the current it needs, so you don't have to try to match that current on the power adapter side. Just make sure it's at least 1.6A, preferably 2A. I never saw my S6 pulling 2A at 5V or 9V.
I'd imagen as this a form for devs . And this guy is trying to create somthing . The devs would be a bit more yaknow . Creative. First off
The guy is trying to make the adaptive charger .give him a bit of credit . I'm currently making a portable charger and I want it to use samsung fast charge
I'm using 18650 battery's 4.2 volts fully charged 3.7 volts give or take when they sag.
So if there is anyone with half a brain out there. How do you get the 9v (8.4) amp to make it a fast charger ( under one and a half hours. ) I'll worry about building the switch to the 5 volts after ( 4.2)
Is it loop the pins . Pin to earth pin to positive loop pins to negative ) the information isn't out there so surely some one has the information. ( just FYI the sgs6 is perfectly capable of being charged at 9 volts. The battery is a nine volt according to the build information explains why charging with any other charger takes 6 hours. .
Also to the op if you did indeed have a similar idea to me just tell erm straight I wanna mess about with low current and voltage dc haha. ( also I tried 18 volts samsung phones do no alow the charge over 9volts so it cannot hurt you're phone

[Review]CHOETECH USB Type C Charger & USB Type C - Type C Cable Review

Hello,
I got a great discount from <MODERATOR EDITED - SPAM LINK REMOVED> on a USB Type C charger & USB Type C - Type C cable bundle for an unbiased review.
I had to pay a few Euro though but that was ok for me since it is always good to have some spare chargers & cables, just in case the stock ones break
CHOETECH USB Type C Charger:
<MODERATOR EDITED - SPAM LINK REMOVED>
The charger is slighty bigger in comparison to the stock charger you get from Google when you buy a Nexus 6P device.
The build quality is nice, I didn´t see any sharp edges. The text markings are easy to read too.
This charger can deliver a max. power output of 18W at following values: 5V @ 3A, 9V @ 2A or 12V @ 1.5A
Pictures:
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CHOETECH USB Type C - Type C Cable:
<MODERATOR EDITED - SPAM LINK REMOVED>
I got the 1m version of this cable. There is not much to say about it, it looks good and seems to be of a similar quality like the stock USB Type C - Type C cable you get from Google when you buy a Nexus 6P device.
Both plugs have a <MODERATOR EDITED - SPAM LINK REMOVED> text engraved into the plugs. The contacts seem to fit well, the diameter seems to be the same like the stock cable.
Pictures:
Tests:
I used the App Ampere for the tests in order to have a good guess, if the charger and the cable is a good replacement for the stock accessories.
I got similar values, even when I combined all pieces together. It seems that these items can deliver what CHOETECH mentions in the descriptions.
The phone is charged fast and the best readout I could get was about 2950mA which is pretty close to the 3000mA you would expect in theory.
The charger feels quite warm in comparison to the stock charger but I guess it´s still ok.
I´m happy with these items and I hope that these will last for a while.
Did you make similar experiences too ?
I can confirm this. Bought the charger and a 2m cable one month ago and I'm still very happy.
That´s great to hear. Any more opinions ?
I´m waiting for mine. This is really good replacement product..
Just thought I'd throw my 2 cents into the discussion.
I got these CHOETECH cables to review and I was quite impressed with them. In all honesty they performed identically to the cable that came with my 6p. I noticed that my phone wasn't charging as fast as it was advertised (with both stock and CHOETECH cables) and was a little confused by it. I'm a musician and travel alot and on a recent trip I charged up in my hotel room and it was as fast as advertised (0-100% in about 97 minutes). It was then that I realised the issue may be with the power at my house.
Anyhow, if you're in the market for some additional cables to add to your arsenal, these are a worthy addition!
I did the following combinations:
CHOETECH charger + CHOETECH cable: The peak current shown by Ampere was about 2950mA, this combination charges the phone as fast as the stock items.
CHOETECH charger + Stock cable: The peak current was also around 2950mA or slightly lower. This combination also worked well, I couldn´t see any differences.
Stock charger + CHOETECH cable: The peak current was also near 2950mA. The phone also charged fast.
Now there are a few things to consider:
1) Ampere or similar tools are not 100% precise and can only be used to get a good guess if everything works out fine.
2) Even the slightest mechanical variation of the cable can also increase the resistance of the cable and lower the output voltage and the current. This can be tricky with USB Type C but the tolerances are so small that you might never notice a decrease of performance around 1-2%.
3) The built in battery doesn´t have a 100% exact capacity of 3450mAh. It can also have a slight +- tolerance which will affect the time measured to charge it.
Most people won´t check the exact time needed anyway It doesn´t matter if your phone needs 1,5 hours to charge from 3% -> 100% or 1,49 hours
I bought the chotech charger and 2 cables pack. Its working fine, but the cables don't seem to seat very well within the type c fitting in the ac adapter. They wobble. The stock ac adapter and cable are very solid. Wonder if anyone else's like that. The wobbly fit doesn't fill me with complete assurance and confidence over time.
I have this charger. I'm happy with the purchase. Recommended.
Choetech
After doing a few weeks of testing with the latest Choetech Type-C to C *9.9ft(3M) cable and the Type-C 2.0 rapid travel charger, I think it's time I say a few words about them.
From my first impressions I was like wow this cable is super long. *Which could be a good or bad thing. I've been using stock cables for all my devices for a long time, and they have all been 3 to 4ft long. Which in today's world not long enough and not really logical if you need to have it behind a desk or while using it.
But anyways the cable is very nice and it actually snaps into my Nexus 6p. You can literally hang your *device from the cable without it falling to the ground. I tested the cable with CheckR app and it is approved and never had a issue charging my precious Nexus.
*Now for the charger not much I can say about it except that it just works. Charges my device from 5% to 100 in just over a hour. My Nexus says its charging rapidly on the lock screen. I have noticed sometimes when the charger is working really hard it makes a slight buzzing sound. But once the device gets to a certain percentage it stops. Now this isn't all the time just every so often. But it never effected charging. I highly recommend you all purchase these two products. You won't be dissatisfied.
Links:
CHOETECH Hi-speed USB-C to USB-C Cable 10ft(3m) for USB Type-C https://www.amazon.com/dp/B017W2RWAO/ref=cm_sw_r_other_awd_5qXNwb614QDTE
USB Type C Charger, CHOE 5V/3A 15W Rapid Wall Charger with the Latest Charging Tech *https://www.amazon.com/dp/B017I7EX46/ref=cm_sw_r_other_awd_CNXNwbRDTYX41
Sent from my Nexus 6P using Tapatalk
Let this Google employee help you find a USB Type-C cable
I have bought 2 USB-C cables to USB 3-A & one did not click in to Nexus 5x & the other one says Slow charging?
Did you buy these Choetech versions of another brand, what charger brick are you using.
Sent from my Nexus 6P using Tapatalk
The buzzing sound while charging kinda worries me. anyone else? aside from that, and the heat it puts out it seems to work fine.
smirkis said:
The buzzing sound while charging kinda worries me. anyone else? aside from that, and the heat it puts out it seems to work fine.
Click to expand...
Click to collapse
I talked to them last night. They have a new model that fixes that. Give them a email back if you purchased from Amazon. And if you buy a new one today you'll get the latest model from Choetech
Sent from my Nexus 6P using Tapatalk
The buzzing sound might be the result of saturation of the transformer built inside. I didn´t notice any buzzing since I didn´t put my ear next to the charger
A newer revision is always nice to have
Gorgtech said:
The buzzing sound might be the result of saturation of the transformer built inside. I didn´t notice any buzzing since I didn´t put my ear next to the charger
A newer revision is always nice to have
Click to expand...
Click to collapse
It's pretty noticeable when you chilling with no TV on.
Sent from my Nexus 6P using Tapatalk
I checked my unit again and I can confirm a slight buzzing noise. It is barely audible though, you really have to put your ear next to the charger. I think this is something common with most chargers and as long as the device works, I would not care too much about it

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