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Are all of Apple's OEM iPhone wall chargers (the white little square looking one's) rated at 1 amp? They're cheap on eBay and I like their small form factor and want to pick one up for my Captivate. Thx
I use one and they work fine.
^If you have your charger on hand, would you mind checking to see if it outputs 1Amp?
On your phone, go to Settings->About Phone->Status->Battery Status. If it says "Charging (AC)", it is charging at the max amperage the charger can offer (up to 1A). If it says "Charging (USB)", it is only charging at 500mA, the max a PC USB can offer. I'm pretty sure for iPhone/iPod chargers, it will show later case on our phone because it is not wired according to Samsung's AC charging requirement. I knew this because I had a 3rd party Car charger that was designed for iPhone/iPod and it won't let my Captivate to charge in AC charger mode. I have to open the charger and make a few mod myself to let Captivate to recognize this is an AC charger, not PC USB.
On the other hand, my 1A charger from Kodak Zi8 flash cam works w/o problem with Captivate.
foxbat121 said:
On your phone, go to Settings->About Phone->Status->Battery Status. If it says "Charging (AC)", it is charging at the max amperage the charger can offer (up to 1A). If it says "Charging (USB)", it is only charging at 500mA, the max a PC USB can offer. I'm pretty sure for iPhone/iPod chargers, it will show later case on our phone because it is not wired according to Samsung's AC charging requirement.
Click to expand...
Click to collapse
ty for the reply. I modded a usb retractable cable by shorting the middle connectors and when I go into settings it shows it's "Charging AC". This is with a generic 700mA usb wall charger I got with a cheap connector kit for my old iPhone.
Anyway, I recently got my Captivate and I find myself constantly playing with it, but it kills my battery doing so. I just want to charge my phone as quickly as possible so I can continue playing with it some more (in a good way).
I like Apple's wall charger because it's small.
From what I have read they are rated at 650 mv so fox is right that they will show as a usb connection. I have never really paid attention and am making a relatively uneducated, yet randomly tested, through my own purely subjective method of simply plugging my phone into anything that will allow my usb cord access, guess that anything with a female usb connection is fine.
Li-ion batteries are kinda dangerous so I am pretty sure there is some sort of idiot proofing built into the charging circuitry in the phone as well.
I'm pretty sure the Captivate will only draw the amps it needs so there should be no danger whether the wall charger is 1 or 2 Amps or more.
The difference is simply the charge time. The phone needs about 3 to 4 hours to get a full charge on the stock 700mA charger. When using generic USB chargers, it will be limited to 500mA max regardless what the charger is capable of and the full charge time will be proportionally longer. The bigger problem is that when your battery is really really low, 500mA may not be enough to even start the charging. That's why you need always keep the OEM charger handy for emergency.
BTW, for a car charger, 500mA won't keep your bettery from draining if you run navigation app that needs to power GPS chip, keep the screen on and download map from 3G connection at the same time. It requires 700mA or more. That is why it is very critical for a car charger be recognized by the phone as AC charger to draw more juice.
Ok, as I stated in my previous post I modded a USB cable by shorting the two middle data connectors, which tricks the Captivate into thinking it's charging with AC through my generic 700mA wall charger. It also says in settings it's "AC Charging" when I looked.
I just wanted to know if the iPhone's wall charger is rated at 1A or was it 650mA?? as newter55 stated.
thx for everyone's help.
Edit: My mistake, I thought I posted this in the Q&A section.
For some new PC motherboard with USB3.0,
they can output 900mA~1000mA(1A) in one single USB port.
You may check this out http://goo.gl/TUaef
If your PC is already 2 years old or older, the usb will only output 500mA in the max.
And, most Li-ion charger are smart enough.
In fact Li-ion charger circuit need to be well design in current control and over current/charge control.
The circuit will not pump full current to the battery in the beginning,
and it will not draw too much, so no need to worry about burn it up.
However if the current is too high let's say 10A.... it may possibly burn the circuit.
Maybe it is a bit difficult to measure current, you need to cut the wire and plug it to ampmeter....
Here is some reference.
500mA - full charge need over 3hrs
700mA - around 2hrs
1A - ~1.5 hr
johan8 said:
For some new PC motherboard with USB3.0,
they can output 900mA~1000mA(1A) in one single USB port.
You may check this out http://goo.gl/TUaef
If your PC is already 2 years old or older, the usb will only output 500mA in the max.
Click to expand...
Click to collapse
It is not about USB port side. The phone itself also detects and determines how much current it will draw. If it detects it is a PC USB, it will only draw 500mA max as Captivate is designed following USB 2.0 spec.
Ok, thanks for everyone's help. I was able to find out on my own after scouring the internet and talking to someone who has the Apple wall charger and it is indeed 1Amps. I believe all wall chargers that come with the iPhone 3g and all iPhone models after are 1Amps. Not sure about the original iPhone 2g.
Also, for curiosities sake, the iPad USB wall charger is 2Amps.
foxbat121 said:
It is not about USB port side. The phone itself also detects and determines how much current it will draw. If it detects it is a PC USB, it will only draw 500mA max as Captivate is designed following USB 2.0 spec.
Click to expand...
Click to collapse
Maybe.
I don't know the control circuit inside GalaxyS.
But USB2.0 doesn't means it is just 500mA.
iphone is just usb2.0, but it is the only thing can draw 1A from USB ?
http://goo.gl/GVqKl
(with designated m/b)
johan8 said:
Maybe.
I don't know the control circuit inside GalaxyS.
But USB2.0 doesn't means it is just 500mA.
iphone is just usb2.0, but it is the only thing can draw 1A from USB ?
http://goo.gl/GVqKl
(with designated m/b)
Click to expand...
Click to collapse
You're missing the point. The charge port on the phone can draw more than 500mA but only if it detects it is connected to a AC charger. Like mentioned above, you have to short the data PINs on the USB port or cable to let the Captivate think it is connected to AC charger. For iPhone, the data pins need to be connected to certain specific voltages in order to let iPhone know it is connected to an Apple AC charger.
When the phone can not detect AC charger characteristics, it falls back to PC USB 2.0 spec which is 500mA max.
I use one to charge my Zune. Haven't had a problem.
foxbat121 said:
You're missing the point. The charge port on the phone can draw more than 500mA but only if it detects it is connected to a AC charger. Like mentioned above, you have to short the data PINs on the USB port or cable to let the Captivate think it is connected to AC charger. For iPhone, the data pins need to be connected to certain specific voltages in order to let iPhone know it is connected to an Apple AC charger.
When the phone can not detect AC charger characteristics, it falls back to PC USB 2.0 spec which is 500mA max.
Click to expand...
Click to collapse
I fully understand what you're saying.
In iphone3, it can only draw 700mA from USB,
IP4 can draw nearly 1A from "computer" USB.
While iphone are just USB2.0 !
GalaxyS can draw 1A in max.
But does it like iphone4 can draw 1A from PC USB ? I don't know.
Or just like IP3 can draw only 500~700mA ?
I don't have new m/b and ampmeter so can't testing on it.
Anyone using this charger with their Inspire4G?
I've tried using this charger with my phone, with several different cables, including the OEM cable. I can only ever get the phone to charge at the USB rate, not the AC charge rate.
Is this normal or is my charger defective?
http://scosche.com/consumer-tech/product/1921
I would assume thats because the 2.1A is ment for Ipad/Iphone/Ipod devices as they require a larger amp charge.
The 1.0A is ment for all other USB devices.
States that in the description.
Charge your iPad and an additional USB powered device at once
Use your existing USB cables to charge any additional USB powered devices
2.1 Amp USB port for charging iPad
1 Amp USB port for charging additional devices
Were are you getting AC Charge rate / USB Charge rate ?
On both ports, I'm only getting the USB charge rate.
d00mz said:
On both ports, I'm only getting the USB charge rate.
Click to expand...
Click to collapse
What do you meen USB Charge Rate..
I am going to guess ..
AC Charge Rate = Wall Charger
USB Charge Rate = Computer USB 2.0/3.0
Does car charger port provide enough amps to give full value?
metaldood said:
Does car charger port provide enough amps to give full value?
Click to expand...
Click to collapse
Yes. See below.
xKrisx said:
What do you meen USB Charge Rate..
I am going to guess ..
AC Charge Rate = Wall Charger
USB Charge Rate = Computer USB 2.0/3.0
Click to expand...
Click to collapse
when you go into Settings -> about phone -> Battery
It will show you the charging status. USB Charging typically is no more than 500ma. AC charging should be 1a.
I have an old AT&T brand car charger that charges the phone in "AC" mode.
This is were I am still getting confused.
What ROM are you running, Stock / MIUI / CM7 / or a Rom based off of stock ?
Is it 2.3.3 or 2.2.1 or 2.3.4 ?
I don't have those reading under battery status.
Anyways, I will go ahead and make the assumption that your car charger is busted and need to get it replaced.
This is were I don't get were you are stating AC Charging.
Alternating Current = AC Direct Current = DC
You cannot charge a battery " DC " with an Alternating Current " AC " period. Thats why all battery chargers reguardless of type convert AC power to DC.
Then only thing I can think of is maybe your phone can detect what type of charger it is connected to, displaying it as an AC Wall Charger or a DC Car/USB Charger.
Wall Chargers will generaly charge quicker then a computer USB Charger. Car charger typicaly charge quicker then most wall chargers.
Most Car chargers are very poor at controlling the amperage being supplied. They may stay at the right voltage but rest assured, you hit a 5v 2amp battery with a 5v 10amp charge and your going to fry it. This is the reason I dislike car chargers.
I can only see one of two problems with your Car Charger ;
1: the Car charger is bad
2: your 12 Power source port is not supplying the correct amperage that your car charger requires. IE:
I have the HTC Car dock for my inspire. It has an imput requirement of 12V 5 Amps to operate efficiently. The Power supply I have it plugged into is the 12V 20A Accesory Port in the front of my truck. It works just fine.
If your device requires say 12v 5 Amps to operate efficiently yet your car is only supplying 12v 1 Amp due to bad wiring, old fuses or bad connections your car charger will not charge at idicated levels.
The ROM is simply displaying "USB" if it is drawing 500ma charge, or "AC" if it's drawing 1000ma charge.
I'm running the 2.2.1, the LeeDroid_HD_V.2.0.0 ROM
d00mz said:
The ROM is simply displaying "USB" if it is drawing 500ma charge, or "AC" if it's drawing 1000ma charge.
I'm running the 2.2.1, the LeeDroid_HD_V.2.0.0 ROM
Click to expand...
Click to collapse
Ok, so your saying that when you have the Car Charger plugged up and your device connected, your only getting a 500ma charge. When you use your old ATT Car Charger it shows 1000ma.
500ma = .5 Amps
1000ma = 1.0 Amps
If your not getting over 500ma out of your car charger then either 1 of two things.
Car Charger is busted, get it replaced.
Car is not putting out correct Amp - Voltage for the car charge to operate correctly.
Your old car charger could have different requirements and that is the reason it works, your new one could use a deifferent set and may not work.
Regardless, its not working in your car, try it in a friends and see if it works, if not then the charger is broke, if it does, then your car is broke.
Try usiing current widget while charging.. and see the readings
Inspired from my Inspire 4G using XDA Premium App
i don't know what you are talking about here. The 2.1 Amp option is NOT the AC charging rate. It is pretty clear if you look at the stock HTC charger that comes with the phone, it says it outputs "1.5 V at 1A".
And anyways...if you look at the product description on the link you posted, it CLEARLY states the 2.1A is for charging an iPad.
buddy17 said:
i don't know what you are talking about here. The 2.1 Amp option is NOT the AC charging rate. It is pretty clear if you look at the stock HTC charger that comes with the phone, it says it outputs "1.5 V at 1A".
And anyways...if you look at the product description on the link you posted, it CLEARLY states the 2.1A is for charging an iPad.
Click to expand...
Click to collapse
I've used both ports on the reVIVE II, both the 2.1a and the 1a. Both only report the phone charging at 500ma
d00mz said:
I've used both ports on the reVIVE II, both the 2.1a and the 1a. Both only report the phone charging at 500ma
Click to expand...
Click to collapse
sorry...i thought you were referring to the AC rate as the 2.1A port, and the USB rate as the 1A port.
Currently using BuoyAOSPsy v131 ROM
I have noticed that my battery still drains while I am plugged in and the phone indicates it is plugged in. Have not tested this while plugged into a wall jack, only in my car or via USB to computer.
When this occurs I am using GPS/Navigation software, active data connection (ofc), and playing music.
Does USB or car adapter not supply enough "juice" for this phone to run multiple applications/features? Is there anything I can do to remedy this, such as try a different car adapter? What specs do I need to look for to ensure appropriate power transfer?
Thanks!
**@ Moderators: Hopefully I placed this in the correct forum. Since it is not necessarily directly related to the ROM I thought it should be kept out of the ROM's thread.
Yes you can easily draw more power then its supplying when using computer or car charger. Most of the time its only charging 500 ma when charging that method. Wall charger's I believe are 1000 ma. Navagation is a HUGE draw on battery.
u921333 said:
Yes you can easily draw more power then its supplying when using computer or car charger. Most of the time its only charging 500 ma when charging that method. Wall charger's I believe are 1000 ma. Navagation is a HUGE draw on battery.
Click to expand...
Click to collapse
Thank you for the info. Guess I'll just have to find a higher quality car adapter.
Actually ive read when using a data cable ie stock or regular micro usb cable on a usb port on your pc or a regular charger the max it will get is 500ma. one of the oem wall chargers (block with usb port) is able to supply 1000ma and the phone is only able to sense this the data pin + and - are shorted together. this tells the phone its charging ac plugged vs usb. now check the output of your car charger and if its able to supply more than 500ma then you can either short pins 2-3 on your cable or on your charger and you will get maximum current draw. Research it you ill there was an article posted on xda somwhere.
I'm getting 1000ma from both my ccar charger and AC adapter. u don't want to pin short a cable and charge from usb. drawing that much power will damage the port, it wasn't designed for that (1.0,2.0). USB 3.0, on the other hand :-D
Am I right in thinkijg if you charge your phone via USB it takes longer to charge compared with a mains charger?
Would a USB cable that is plugged into a mains charger be the same speed, or slower, than a normal mains charger?
Sent from my GT-I9300 using xda app-developers app
Wall chargers have more megabytes than you puter.
Sent from my Kindle Fire running CM10
Informative
Sent from my GT-I9300 using xda app-developers app
I've noticed that if i plug my phone to a wall charger (i got a Xperia P with mini-usb port to charge and sync) it will charge twice as fast as with the usb. Maybe because it as a fast charge feature, but generally on USB my phones rechargered slower than with wall adapter. Probably because of the voltage.
When I'm in a hurry, charging with the wall charger certainly gets the job done.
It's not the voltage it's the current. USB ports on a computer don't have much ass behind them and can't support a heavy current draw, they're just not designed for it. Most allow about .4A (amp). Wall chargers generally range from .7A- 1A. Iphone chargers are much higher in the 2A range.
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If it was easy you'd of hired the guy at Home Depot to to it.
If you look at the wall charger you'll probably notice it says something like "Output : 1000 mA". When charging from a USB port, you're most likely drawing only 500 mA.
500 mA is half 1000 mA.
As far as I know, if you plug in your Nexus5 (or any phone) into a power source with high amperage (>1A), your phone should utilize the amps it actually needs to charge at full speed (AC Charging).*
For example, if i plug my Nexus 5 into a 2.1A charger, it will charge just fine and draw only the required amps needed.*
Ive noticed my phone (rooted with faux) and my wifes (stock) and very finicky when it comes to the amps a charger uses. *It appears that if a charger is not exactly 1.0A or 1.2/1.3A, the phone charges as USB and not AC (no matter which USB cable I use). *Below is what I have found out, *with charge type/amp and how the phone sees it
Stock charger (1.2A) - AC
Anker 25W 5-Port Wall charger (1A Android port) - AC
Anker 25W 5-Port Wall charger (1A iPhone port) - USB (not sure why??)
Anker 25W 5-Port Wall charger (1.3A Galaxy Tab Port) - AC
Anker 25W 5-Port Wall charger (2.1A iPad ports) - USB
Anker E4 13000mah battery (2A) - USB
ANker E4 13000mah battery (1A) - AC
Anyone else experience this?
Sent from my Nexus 5 using Tapatalk
What you've observed here actually has nothing to do with the amperage of your ports and everything to do with how their data pins are wired. The N5 (and most other android devices) looks for the data +/- pins in the USB port to be shorted together, this is how it determines it's connected to a charger. Apple devices do this differently, they look for a specific combination of voltages to be present on the data +/- pins. When you connect your N5 to an Apple port, it ignores these voltages and just charges as if it were connected to a PC.
Now the fact that it sees the Galaxy Tab port as a charger is kind of interesting because the Tab uses yet another method for charger detection. It looks for resistors of a specific value connecting the data +/- pins to the power +/- pins. Cool that the N5 recognizes this configuration as well.
Anyway, this is why your Anker charger has ports dedicated to specific devices, each one is configured a little differently.
That would make sense, however, I would expect the same thing on my Nexus 4 but that doesn't happen. It charges as AC for every port
Sent from my Nexus 5 using Tapatalk
It could simply be that the N4 uses a different power control IC from the N5 (they almost certainly do). That and the software controlling the charging determine whether the phone enables AC charging from different ports or not.
I believe (I have not tried this) that some custom kernels have a setting that enables fast charging unconditionally, to draw as much current as the hardware allows.
Yeah I'm waiting for a kernel to support Fast charge, don't believe any do at the moment
Sent from my Nexus 5 using Tapatalk
the phone may revert to lower power usb charging if some condition isn't met... the phone is completely ignorant of the rated power of the wall wart. current is drawn, it depends on ohms.. so it has nothing to do with the "power output." what i mean is there is no situation where too many amps is going to trigger something in the phone, the phone controls the amps and is ignorant of the max the supply can give unless the phone actually exceeds that and detects a voltage drop, the supply can't force more amps without raising voltage to do so but that's just not how these devices work. so it's not because of the amps of the charger, it must be some other aspect.
what the phone can see is voltage. the state of the microusb "Id" pin (which will probably be open if you are using a data cable and not a specific dock to put it in desk mode or car mode, not that i think the n5 has those modes, but the Id pin is what tells the phone these things, as well as set them into download mode to flash them) and the state of the data pins. generally the data pins need to be shorted together to tell the phone to go into ac charging.
it's possible however that if the voltage is lower than 5v, the phone assumes there is voltage drop from too low a power rating on the supply and it's unable to supply the current. in this situation the phone may default to a lower current charging mode. some ac chargers may not go all the way to 5.0v they may put out as low as 4.45v... if the voltage is either low or unstable from the "high output" charger it may cause the phone to think it has exceeded the output rating of the supply when infact it's just getting unclean power. try it with an official tablet charger for a kindle or something and not a store bought anything..... some of the high output chargers just have substandard regulators and/or filtering.
there may also be more to this. usb 3.0 has a higher current rating than usb 2.0 if the phone can detect the type of port it's connected to, that may also determine the charge mode.. (in thoery anyway, no reason it can't work that way, but i can't say i know that it does on any current device)
It's getting pretty aggravating now that my Nexus 5 charges as USB when connected to my anker slim 2 1A external battery as well as my anker astro e4 1A port. No reason why it should do this
Sent from my Nexus 5 using Tapatalk
If you use a fast charging USB cable with the proper pins shorted you should get it to charge with in AC mode. I grabbed one from Amazon and it changed from DC to AC on the same charger.
jalanjkcarp said:
If you use a fast charging USB cable with the proper pins shorted you should get it to charge with in AC mode. I grabbed one from Amazon and it changed from DC to AC on the same charger.
Click to expand...
Click to collapse
Oh thanks for that tip. I'll order one on Amazon right now and update this thread
Sent from my Nexus 5 using Tapatalk
What happens if you connect an Apple device to one with the shorted pins?
Earth explodes
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jalanjkcarp said:
If you use a fast charging USB cable with the proper pins shorted you should get it to charge with in AC mode. I grabbed one from Amazon and it changed from DC to AC on the same charger.
Click to expand...
Click to collapse
Tested the new USB cord on all ports, charges as AC. Thanks a lot
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