Database Info

Can the phone tell the different between a charger and a computer?

I just find it stupid that the phone would show a notification for USB connection when I connect it to a charger.

Yes, it can tell the difference. Check in OS monitor, it knows whether you are getting power from USB, or from AC.

My phone thinks my car is a computer. As far as I know, it goes by the current being received -- 500 mA from a computer, 700 mA from the stock wall charger.
Sent from my SAMSUNG-SGH-I897 using XDA App

I don't think it depends on the current.
With my factory charger, if I insert the charger in and kinda pull out one side of it, it will think it's a computer and I can "mount" my sd card. so it might be a certain way the connectors touch inside

saint168 said:
I just find it stupid that the phone would show a notification for USB connection when I connect it to a charger.
Click to expand...
Click to collapse
It depends on the charger, but yes, the phone for the most part can tell the difference. It has to do with the voltage that is put out.

Ikonomi said:
My phone thinks my car is a computer. As far as I know, it goes by the current being received -- 500 mA from a computer, 700 mA from the stock wall charger.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
It has nothing to do with amperage (unless it is under 500) and everything to so with charging source. Wall chargers basically short the data wires to indicate AC charger and car chargers do not.
There is a thread in accessories forum discussing this and mods to get full charging out of car chargers. I did it by modding an extra cable. My car charger puts out 1 amp but the phone never draws more then ~ 750 mah.
Sent from my MB520 using XDA App

Dungeon47 said:
Yes, it can tell the difference. Check in OS monitor, it knows whether you are getting power from USB, or from AC.
Click to expand...
Click to collapse
Every time I read one of your posts, in my head is McGyver's voice. Hearing him narrate the xda forums is hilarious.
From a phone

The phone can take up to 1000mA of charging current. But only if it detects it is on one of its supported AC chargers. Draw more than 500mA on a PC USB port may damage it. So, there is special wiring needs to be done for the data PINs on the USB port. That's why for generic car charger and wall chargers, it can't only assume it is PC USB port and charges at a slower pace (500mA). You will need the Samsung AC or Car charger to charge at higher current. I managed to mod one of car charger to be recognized as AC charger (no USB prompt). And you really need it because if you're using the phone as GPS navigation device, 500mA won't be able to sustain it (battery will keep be drained). You need 700ma or more.

It also depends if you have your USB connection set to a default if you will get that pop up when you connect it to any other than an AC charger.

Ikonomi said:
My phone thinks my car is a computer. As far as I know, it goes by the current being received -- 500 mA from a computer, 700 mA from the stock wall charger.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
Yes it does and is sensitive. I have been using a BT headphone charger and I would be perplexed that my phone showed 100% but pull the plug and its at 87% every morning AFTER recalibrating the battery.. LOL
Decided to use the Samsung Charger and no such issues. Needs those extra Milliamps.....

[Q][A510]USB charging- possible or not?

Hi
I'm wandering if it's possible to mod my a510 to allow USB charging:
-according to teardown picture it's a standard 3.7V one (looks like 2 cells in parallel)
-charger is rated 12V but output is connected to extra pins- there are 2 rows of pins, one is USB and second one I guess is used by a dock
Except for making us use official charger I can't see any reason why USB charging is not present.
Do you know if it's possible to get a510/511 internal schematics?

gen_scheisskopf said:
Hi
I'm wandering if it's possible to mod my a510 to allow USB charging:
-according to teardown picture it's a standard 3.7V one (looks like 2 cells in parallel)
-charger is rated 12V but output is connected to extra pins- there are 2 rows of pins, one is USB and second one I guess is used by a dock
Except for making us use official charger I can't see any reason why USB charging is not present.
Do you know if it's possible to get a510/511 internal schematics?
Click to expand...
Click to collapse
I charge mine in our campervan off the 12V cigarette lighter plug.
The charging icon doesn't come on but it does charge, just very slowly - a few percent an hour.

Clumzie said:
I charge mine in our campervan off the 12V cigarette lighter plug.
The charging icon doesn't come on but it does charge, just very slowly - a few percent an hour.
Click to expand...
Click to collapse
But what charger do you use? Is it a standard USB adapter?

gen_scheisskopf said:
But what charger do you use? Is it a standard USB adapter?
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Click to collapse
This plus USB cable works.
I've also tested the standard data transfer USB cable connected to the PC.
Try it, leave it charging overnight connected to your PC.

A normal USB-cable will be enough... It'S only very slow

gen_scheisskopf said:
I'm wandering if it's possible to mod my a510 to allow USB charging:
Click to expand...
Click to collapse
Until yesterday I'd have said you "no" but this night I have changed my mind.
On another forum I've read of a user that succeeded in charging the A510 via USB even if slowly (2%/hour) and if the screen is off.
I've tried many times with some 5V 1.2A USB chargers with no luck
My girlfriend yesterday gave me as a present a Anker Astro3 12000mAh battery-operated USB charger with 2.4A output and it charged my A510 from 77% to 100% in about 4-5 hours.
So, it seems it's possible to charge the A510 with USB, if you have a powerful enough charger and enough time.

Red cross at battery! help

hey everyone, i having an issue while charging my note 10.1. When i charge it the battery have a red cross sign on it. i need to off the device in order for it to charge and it took long time for it to charge too. any solution to this?

reddevilboyz said:
hey everyone, i having an issue while charging my note 10.1. When i charge it the battery have a red cross sign on it. i need to off the device in order for it to charge and it took long time for it to charge too. any solution to this?
Click to expand...
Click to collapse
Read the forum its standard .
Multiple slow charging posts .
jje

reddevilboyz said:
hey everyone, i having an issue while charging my note 10.1. When i charge it the battery have a red cross sign on it. i need to off the device in order for it to charge and it took long time for it to charge too. any solution to this?
Click to expand...
Click to collapse
Are you using the supplied charger to charge it or are you charging using the USB-cable connected to you pc?

Use the charger...
Charging tru the USB does NOT work.......

P1nGu1n_ said:
Are you using the supplied charger to charge it or are you charging using the USB-cable connected to you pc?
Click to expand...
Click to collapse
i am using the original charger to the wall charge. even i plug it into pc the red cross still showing. any solution?

As it's stated above - The Galaxy Note 10.1 can not charge threw USB due to the high power usage, all it can do is a "status quo" on battery usage.
So if you wan't to charge the Note, plugg it directly into the wall, and if possible, avoid power extenders.

reddevilboyz said:
i am using the original charger to the wall charge. even i plug it into pc the red cross still showing. any solution?
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Click to collapse
If you are using the ac charger and the original cable, then you may have a fault in either the charger or the usb cable
If you can borrow a friends usb cable test to see if that helps
If not try your friends charger.
After a while the usb cable gets damaged and when damage can show a fault in different ways
Slow charging
The red cross appears
It shows charging but the battery never goes pass say about 1%
It shows charging but instead the unit is discharging.
If you get any of these before you wipe your device try another cable if possible
I have had my replaced already and ferl I will go and get a docking unit, and a spare cable
Sent from my GT-N8010 using xda app-developers app

hygradeb said:
If you are using the ac charger and the original cable, then you may have a fault in either the charger or the usb cable
If you can borrow a friends usb cable test to see if that helps
If not try your friends charger.
After a while the usb cable gets damaged and when damage can show a fault in different ways
Slow charging
The red cross appears
It shows charging but the battery never goes pass say about 1%
It shows charging but instead the unit is discharging.
If you get any of these before you wipe your device try another cable if possible
I have had my replaced already and ferl I will go and get a docking unit, and a spare cable
Sent from my GT-N8010 using xda app-developers app
Click to expand...
Click to collapse
sorry for late reply.
i did get a new charger from ebay but unfortuately the red cross is still there but nevertheless it charge slowly.. it took me about 8 to 10 hr for fully charged.
any other solution?

The probabilities are:
Charging Port is broken
Charging cable / Charging cable connector(s) is(are) broken
AC Charger is broken
Analysis:
Borrow someone else's charger & cable
Try the combination :
Other charger + your cable ==> if working then your Charger is broken
Your charger + other cable ==> if working then your Cable is broken
Other Charger + other Cable ==> if working Both Charger & Cable are broken
If all failed ==> your Charging port are broken
Eliminate posibilities

What would happen if I wirelessly charge AND AC/USB charge at the same time?

I was just curious, lol. Would the phone break or something? Thanks.

patsimeon said:
I was just curious, lol. Would the phone break or something? Thanks.
Click to expand...
Click to collapse
Oops, wrong section...Sorry! I don't know how to move or delete this. Anyway, my curiosity stays.

I think qi charging overrides USB charging, but it could be the other way around. Either way, the phone knows to deactivate one.

According to the battery monitor, wired charging (USB or A/C) overrides wireless charging. So, if you plug it in, it doesn't matter if you place it on the wireless charger or not.

I seem to recall someone at Google (on one of their product QA's for this phone) that even though it makes logical sense for the AC charger to take precedence (faster, less heat generation) but the QI charger is the one actually doing the charger.
I realize this contradicts what the battery status would indicate, but it is plausible that the indicator does not report it correctly.
Either way, the only time I can really see this being a factor for me even REMOTELY, is in the extremely rare event I have the phone plugged into my computer via USB, and sitting on my qi charger. But that almost never happens, I sync data to/from the phone over wifi just because, well, it's easier. It's not faster, but since it happens automatically it takes less effort.
In that case, I'd actually prefer the qi charger to work, since it's a faster charge than my USB port.
imagine the hilarity if both charging circuits worked though...sounds good in theory but I think we'd all have broken phones

I've plugged in my USB cable (hooked up to my computer via USB 3.0), while my phone was sitting on my Qi charger (nokia, 750mah), and the usb cable takes priority over the charge.
When wireless charging is in effect, you hear the NFC tone from the phone. Also the light on the charger turns on when its charging. It doesn't play when you lay a phone with USB plugged in, and the light doesn't turn on in front of the charger, so.

I'm pretty sure this would disrupt the space-time continuum.

xybur said:
I've plugged in my USB cable (hooked up to my computer via USB 3.0), while my phone was sitting on my Qi charger (nokia, 750mah), and the usb cable takes priority over the charge.
When wireless charging is in effect, you hear the NFC tone from the phone. Also the light on the charger turns on when its charging. It doesn't play when you lay a phone with USB plugged in, and the light doesn't turn on in front of the charger, so.
Click to expand...
Click to collapse
I can confirm that while setting on the wireless charger, the "charging" light is on on the charger, but if I plug the cable in, the light goes out. The wired charger is DEFINITELY overriding the wireless charger.

For people using OTG cables or external storage adapters on the microUSB slot they do require wireless charging to work while being "plugged in".

awesome question...I have a S5, which has a galaxy charging current app
does one exist for the nexus? if so, you could tell by the amps it is charging at

USB charging issue

Hi all,
My friend's OPO does not charge when connected to the USB port of a computer. It is stock, unrooted, KK 4.4.2.
It charges fine when he charges via the wall charger. My OPO charges fine out of the box, with USB on the same laptop and port.
He does not want to factory reset and I am at a loss here. Please advise what I need to check here.
Thanks!

Oomahey said:
Hi all,
My friend's OPO does not charge when connected to the USB port of a computer. It is stock, unrooted, KK 4.4.2.
It charges fine when he connects it to his TV (he has the US charger but no adapter for Indian plug points). My OPO charges fine out of the box.
He does not want to factory reset and I am at a loss here. Please advise what I need to check here.
Thanks!
Click to expand...
Click to collapse
He can buy a universal adapter for the charger. They're pretty cheap.

It's because the laptop isn't putting out enough current. It must be at least 2a to charge properly.
Transmitted via Bacon

timmaaa said:
It's because the laptop isn't putting out enough current. It must be at least 2a to charge properly.
Transmitted via Bacon
Click to expand...
Click to collapse
The issue here is that my OPO charges through the same USB port and with the same cable. That's what has me baffled.

Well consider me baffled too.
Transmitted via Bacon

Anybody has any idea about this issue?

The front panel of my pc case has usb ports that has trouble recognizing or charging any phone. When I plug it in, the phone will show it charging but the battery continues to drain or I can't access the sdcard. Not sure what causes this, but when I plug my phone into the usb ports in the back that are connected directly to the motherboard, then there is no problem.

kokocabana said:
The front panel of my pc case has usb ports that has trouble recognizing or charging any phone. When I plug it in, the phone will show it charging but the battery continues to drain or I can't access the sdcard. Not sure what causes this, but when I plug my phone into the usb ports in the back that are connected directly to the motherboard, then there is no problem.
Click to expand...
Click to collapse
Thanks for the reply but that is not it. My OPO charges fine from the same port and the same cable.

Anybody got any info on this issue?

Uh, I'd say factory reset or don't worry about it.
Not sure what you expect to hear. But that's probably the first plan of action. Especially since yours works fine.

Opo has higher power requirements. You may need a cable with a 24AWG or better rating (lower allows more current).
Does it work with the stock cable?

tiny4579 said:
Opo has higher power requirements. You may need a cable with a 24AWG or better rating (lower allows more current).
Does it work with the stock cable?
Click to expand...
Click to collapse
My OPO works with any cable, though time to charge is the best on stock cable. But my friend's OPO doesn't charge at all. Even on stock cable.
Unable to make sense of it at all. I may sound like a simpleton, but maybe there is some checkbox I ticked somewhere which is preventing this? UGH!

tiny4579 said:
Opo has higher power requirements. You may need a cable with a 24AWG or better rating (lower allows more current).
Does it work with the stock cable?
Click to expand...
Click to collapse
The phone will work with any cable. Worst-case the cable's resistance and diameter will reduce the maximum charging current significantly but it always will charge the phone.
It's because the laptop isn't putting out enough current. It must be at least 2a to charge properly.
Click to expand...
Click to collapse
No USB port has that much current except maybe for highly specialized ones. USB2 is rated on 0.5Amp, USB3 on 0.9
Of course the phone will take significantly longer to charge or may even discharge when used while plugged in.

I can say "me too". My one also didn't charge from powered off PC while Nexus 5 plugged in the same PC with same cable charges fine.
When PC is powered on, One charges intermittently. I.e. I plug it in, it charges for some time and then stops. "OS monitor" shows "discharging [USB power]" state.
Any thoughts?
Sent from my A0001 using Tapatalk

Cannot charge OnePlusOne via USB
I have the same problem.
The problem seems to have started AFTER upgrading O/S to Cyanogen 12.0.
Cannot charge via USB either from my note PC or Mobile BatteryPak (1.7a).
Above comment that 2a power is required is surprising, as I thought 1a is standard. Maybe there is some Cyanogen bug here?
I found in some Forum to make of SETTINGS - STORAGE - USB COMPUTER CONNECTION, but I do have this setting, and still cannot charge the computer.

taristoblus said:
I have the same problem.
The problem seems to have started AFTER upgrading O/S to Cyanogen 12.0.
Cannot charge via USB either from my note PC or Mobile BatteryPak (1.7a).
Above comment that 2a power is required is surprising, as I thought 1a is standard. Maybe there is some Cyanogen bug here?
I found in some Forum to make of SETTINGS - STORAGE - USB COMPUTER CONNECTION, but I do have this setting, and still cannot charge the computer.
Click to expand...
Click to collapse
Quote from google
In the USB 1.0 and 2.0 specs, a standard downstream port is capable of delivering up to 500mA (0.5A)
Click to expand...
Click to collapse
It will charge very slowly but will charge faster if the device is off. If you're using it while it's charging it's like filling a bucket up with water that's got a hole in the bottom. It fills up. But slower than it would if there was no hole.
As for the battery pack I have a 2.0a EE Battery pack and it works fine so it might be related to the analogy above.

Sorry to bring up an old topic, But its still hanging and non has really come up with solution. So i thought let's bring some light to it.
My dad has encountered the same issue the other day, I'm basically not much PRO into fixing things like this but by turning on/off USB debugging while connected to PC and also turning on/off Developer options does makes it charging through PC again.
Previously it was charging by PC, but dad has messed up something internally and asked me for help, so this lil so called tricked work for me. I hope this will help others to.