Database Develop

1200 mA charger; will it smoke ?

Question: What happens if I connect a Nokia AC-10 Micro-USB charger, that has an output of 5V, 1200 mA, into the phone ? I'm asking this because inside the phone, on the back of it, where the battery compartment is, it says maximum of 1000 mA.
So what would happen if I would connect the charger ? Would it end up in smoke ?

lambda30 said:
Question: What happens if I connect a Nokia AC-10 Micro-USB charger, that has an output of 5V, 1200 mA, into the phone ? I'm asking this because inside the phone, on the back of it, where the battery compartment is, it says maximum of 1000 mA.
So what would happen if I would connect the charger ? Would it end up in smoke ?
Click to expand...
Click to collapse
It depends on what the voltage rating for the phone is, if it is 5v, i believe it should be ok, you may find it actually charges slightly faster, if the voltage is higher thats when you can cause damage though.
I am not 100% sure on this maybe someone else can confirm

Phone: 3.7 V, 1000 mA
Battery: 3.7 V, 1500 mAh
Original Nexus S Charger: 5 V, 700 mA
Nokia AC-10 charger: 5 V, 1200 mA
Charge time = battery mAh / charger mA = 1500 / 1200 = 1.25 h = 75 mins
So the NS battery should charge in 75 mins with the Nokia AC-10 charger.
So all the chargers are 5 V rated, ranging from 500 mA (USB cable) to 1200 mA this Nokia charger. For example, with the HTC Desire, I had an 1000 mA charger that worked flawlessly.
LE: Never mind, I found the response. Sorry for making another thread on this matter, but I didn't find the other topic when I first searched the threads. http://forum.xda-developers.com/showthread.php?t=897935
If a mod sees this thread, please, do delete it, because it's useless now. Thanks a lot anyway !

Just on a side note: Your phone will not necessarily charge faster just because your wall charger can supply more current.
It depends on the charging circuit inside your phone, too. If your Nokia charger and the Nexus S conform to the USB charging specification, the phone will know how much current the charger can supply by the resistance between data+ and data- on the USB-plug. But how much current it draws is up to the phone.
Also, charging LiIon batteries is not as straight forward as (battery mAh)/(charger mA).
It will (most likely) be charged constant current at first and later switched to constant voltage top off charge. I read somewhere that the faster you charge at the beginning, the longer the top off will take.
So you will only gain time, if the supplied wall charger was too weak anyway and why should Samsung do that?
In any case, if you want to try anything you should be sure to be inside USB specs. I think it is 5V +- 5%, so from 4,75V to 5,25V. Less should not be a problem, but (much) more can and will fry your phone.

Good to know, thanks a lot ! Maybe I'll come back here with a comparison between stock charger and the Nokia one (in a couple of days).

most definitely not
i'm using a 2Amp car charger, and it charges really fast, even when the phone is ON, full brightness, gps + streaming BT to car audio
lambda30 said:
Question: What happens if I connect a Nokia AC-10 Micro-USB charger, that has an output of 5V, 1200 mA, into the phone ? I'm asking this because inside the phone, on the back of it, where the battery compartment is, it says maximum of 1000 mA.
So what would happen if I would connect the charger ? Would it end up in smoke ?
Click to expand...
Click to collapse

i would think that it would charge faster with your nokia charger but your phone will get hotter than normal. i experience this when i use my 1A charger. 1.2A will make it even warmer. i hope you dont overheat your phone.
ps. fast chargers (15 min chargers) for Ni-Mh batteries have 7.5A. those kind of chargers come with fans on them to cool the batteries while charging because it gets really hot.

Ok guys, thanks a lot, I'll keep in mind all you said. Unfortunately, I've come across a dead Nokia AC-10 charger (don't ask, lol), so I will need to get another one tomorrow. After that I'll compare the 2.

The charging circuit (in the fone) tries to stop the battery blowing up and overheating by pulsing the charge until the battery reaches 70%+ when it drops off and the charge creeps up to 97% (all values approx) when the carge circuit switches off and we are left with a fone at 97%+ (other threads on this topic itself !)
I experimented with standard Nexus AC (700mA) and USB Wall Charger (1000 mAH) and Laptop USB Cable (500 mA) and 1 am disappointed at not being able to get a FAST charge in the thing. Here is a plot of the AC Charge (700 mA charger). It never gets used a full power !
http://www.lacbayvilla.com/images/chargingfromAC.png

Ok... something is really screwed up... when I connect the phone via the Nokia charger, the touchscreen goes haywire... If I touch it in one spot, it sees the touch in another spot... It even starts apps without me even touching them... weird. Is it too powerful for the phone, or what ?

The nokia charger might not be isolated enough from mains. Too much ripple or whatever. It is unlikely IMHO, that it supplies too much current, since it is no current source, but a voltage source.

in case any one wants to know
2 Amps (2000 mAh) Blackberry charger
this is exactly the one i purchased from them http://www.dealextreme.com/p/design...lackberry-9800-9700-8900-8520-dc-10-30v-57622
been using it for over a year now, since i had my old BB and SGS i9000 and kept using the same one for SNS
i use it on a daily basis, as the first thing i do when i get on the car is to plug the charger and put the phone on winshield

Interesting enough, another one from the store has the same effect. Also, on my girlfriend's HTC Wildfire it has the same effect. Guess Nokia sucks as this as well. GG Nokia, keep it like this and you'll eventually fall like the rest of them...

I have noticed too that when the fone is on charge, the screen sensitivity is maxed out and phantom touches can occur all over the place. So much so that I unplug the charger to send sms as I can't type well enough for the spill chucker to guess what language I am using let alone what the word might be !
Anyone found the cause of this annoyance ?

lambda30 said:
Ok... something is really screwed up... when I connect the phone via the Nokia charger, the touchscreen goes haywire... If I touch it in one spot, it sees the touch in another spot... It even starts apps without me even touching them... weird. Is it too powerful for the phone, or what ?
Click to expand...
Click to collapse
The voltage is not current.
It used to happen on my desire when i bought a 99 cents micro USB charger.
By the way i ordered a AC 10 E yesterday so i am a bit worried now.

What the hell did you bump this old ass thread for? So that you can post in the dev thread?

lambda30 said:
Ok... something is really screwed up... when I connect the phone via the Nokia charger, the touchscreen goes haywire... If I touch it in one spot, it sees the touch in another spot... It even starts apps without me even touching them... weird. Is it too powerful for the phone, or what ?
Click to expand...
Click to collapse
I encountered the same situation like you, and I know many people do. I was told by my cell phone supplier that it's all due to the unstable current, which causes magnetic field to influence the scree. Or something like that. My phone even typed words or made calls by itself when charging, I can hardly control it until I stop using the charger. When I connect it to PC with USB cable to get charged or use another charger, everything goes well. So I suggest you stop using the charger on your phone. It might cause damage to it.

Charged mine with a nexus 7 charger, which had at least 2 Amps... Worked fine for me...
Sent from my Nexus S using xda app-developers app

I use 2000 to and i dont have problems.

[Q] Battery charging problem?

I've had the Droid 3 for about 10 days now, and I've been encountering an intermittent problem with charging the phone.
Last night, I plugged in my phone so that it would charge overnight. I made sure that the connections to both the phone and the outlet were firm, and upon plugging it in, my phone's battery icon and lock screen both indicated that it was charging. However, when I woke up this morning, I discovered that the battery had actually continued to discharge overnight. Despite this, the battery icon and lock screen both continued to say that the battery was charging.
I've run into this problem three times this past week. It's entirely possible that I just have a defective device, but I wanted to check and make sure that nobody else was experiencing this issue before taking it back to Verizon.

Check the task manager for programs using lots of cpu. I've found that using google maps nav in the car dock while charging still in fact uses more power than it could charge. Your issue is with the screen off though so check for background apps.
Sent from my DROID3 using XDA App

I have had this problem 2 times and I have had the phone for about the same time. I plugged it in at like 40% watched a movie screen never came on till the movie was over I looked at my screen and the battery was at 11%. I was thinking maybe just a bad connection untill I looked at the notification bar and it said it was charging!

I just got my Droid 3 yesterday and last night, the first night of use, it did the same thing. Even if I go into battery usage and look at the graph it'll say charging but the power level will be going down. Very frustrating.

A Verizon rep I spoke with recommended trying a different charger. Sounds reasonable enough, so I'll give that a shot and post back after a few nights of use.

What is the current rating of the chargers you guys are using? (i.e. 850 mA, 1 A, etc). A good rule of thumb is not use anything less than 1 A (1000 mA).

The Motorola-supplied charger is 850mA.

RandomEncounter said:
A Verizon rep I spoke with recommended trying a different charger. Sounds reasonable enough, so I'll give that a shot and post back after a few nights of use.
Click to expand...
Click to collapse
This sounds logical. I had this same problem two phones that happened to have a slide-out keyboard (Shift, G2) and the problem vanished when I used a different charger. I just read today that 100s of people were having this problem today in a news feed.

I was having the issue too, so I used a 2A charger that came with my Huawei tablet...no more issues! (Charge time is about 1.5 hours too!)

pplude said:
I was having the issue too, so I used a 2A charger that came with my Huawei tablet...no more issues! (Charge time is about 1.5 hours too!)
Click to expand...
Click to collapse
I'd be careful about using higher amperage chargers. Don't want to be burning out the charging circuitry. Not saying you will.. just be careful using a charger not designed specifically for the device.

Apparently the new Moto LiPo batteries have another level of overcharge protection. To be safe, I'm going to use an ohm-meter about once a week or so to check the internal contacts (a higher ohm rating would suggest damage).

pplude said:
Apparently the new Moto LiPo batteries have another level of overcharge protection. To be safe, I'm going to use an ohm-meter about once a week or so to check the internal contacts (a higher ohm rating would suggest damage).
Click to expand...
Click to collapse
Good to know. I found one of those chargers for $6, I'm considering getting one now.
http://www.bargaincell.com/huaweiid...e-p-509461.html?cPath=58893_59091_59092_59093

elkay said:
Good to know. I found one of those chargers for $6, I'm considering getting one now.
http://www.bargaincell.com/huaweiid...e-p-509461.html?cPath=58893_59091_59092_59093
Click to expand...
Click to collapse
That's not the one I have, I'm using the USB-output charger from the S7 SLIM, then the Moto supplied USB cable.

Well, it's been a few days, and I haven't experienced the problem since switching to a different charger. Granted, the problem was intermittent, so it's difficult to know for certain if the charger was in fact the issue, but I'm content with this solution.

I've been using my iPad's 5.1V 2.1A charger without issues for a few days. It charges the extended battery from 10% to full in a little over an hour.

That's the dual-core proc for ya. Wonder why the Xoom uses a proprietary charger? dual-core devices nom battery.

Jewremy said:
That's the dual-core proc for ya. Wonder why the Xoom uses a proprietary charger? dual-core devices nom battery.
Click to expand...
Click to collapse
No? Dual core is more efficient, it shuts down one of the processors when it's not in use. Dual core means nothing about power efficiency. As a matter of fact, it can have an advantage. Each core uses less power, and combined, they can use less power than a similarly powerful chipset.

I've also run into some issues on my 5 day old Droid 3. It seems to be when disconnected from the charger. I have two regular Moto chargers for this, and tried a 1A HTC charger, which this thing will not charge from.
I tried using different micro USB cables, which didn't help, either. I was trying to move the phone around while charging, and seemed to encounter the issue. Either it's a connector issue for the mUSB, or the (especially short and stiff) charging cables have broken conductors inside, and we're getting a bad batch of cords.
Possibly the D3 has its own issue with charging, but I didn't have a problem until this morning. regular mUSB cords won't work for me at all, as I've tried all I have.
Given this issue, I'm wondering how widespread this is, and if it's something to take the phone back for. I took me a few hours (over 3) of waiting and fiddling with it, but it's at least charging now.

I had this issue to. I used a different charger and cord to charge my phone at night woke up the next day no charge. I went to work pluged in to my wall charger and still no charge. I did a factory reset thinking that might work but it did not. I was going to take it to a verizon store after work so on the way there I pluged in to my car charger an it started to charge so I skipped the store. When I got home I used a different cord and wall charger and it also worked. I did notice that when I plugged in the night before that a small little white light was lit up for a second in between the charging port and hdmi. I know there is a light there but never seen it light up before. So maybe that was behind all of this. Not had a problem sense.
Sent from my DROID3 using XDA App

The amperage you see stated PS units has no effect on your phone. That's not how many amps leaves the unit to charge your battery. That's how much the PS unit can handle as a draw. In reality the reason the stock ones are only 850 only means that the manufacture used spec parts for the PS unit. i would think that Motorola's minimum spec was 850 and so that's what the PS units manufacture used.
The higher the number means nothing other than you can bet the 1AMP one is going to out last the 850.
Of course the last statement is highly speculative because i have no idea what the amp rating for the phone is. But what i do know is that all the parts are made in china and you can bet they are not going to overbuild anything.
If the amp range is 675-832, which is the number I would expect then if the phone draws more than 850 for an extended period of time the units internal fuse could blow. Unless of course you purchased a third party unit that has an external fuse. Then you can jsut replace the fuse and not have to worry about going out to buy Chinese garbage. lolz
but then again i bet this Droid 3 is made in china, oh well. I like it anyway

Where's the high current POGO charger?

For cryin' out loud, I'm tired of watching my battery drain while plugged into the supplied USB charger. It's ridiculous. I've never owned a portable device that discharged under normal use when plugged into its supplied AC adapter. If I want to spend 15 hours a day playing Angry Birds, it should be possible when I have a power source which is virtually unlimited. Twice, I've started the day with a full battery, had the device plugged in to the supplied 2 amp charger all day, and had <10% left on the battery when I went to bed. (No, I don't actually play Angry Birds for more than a few minutes at a time but I do use the device a lot.)

jtown said:
For cryin' out loud, I'm tired of watching my battery drain while plugged into the supplied USB charger. It's ridiculous. I've never owned a portable device that discharged under normal use when plugged into its supplied AC adapter. If I want to spend 15 hours a day playing Angry Birds, it should be possible when I have a power source which is virtually unlimited. Twice, I've started the day with a full battery, had the device plugged in to the supplied 2 amp charger all day, and had <10% left on the battery when I went to bed. (No, I don't actually play Angry Birds for more than a few minutes at a time but I do use the device a lot.)
Click to expand...
Click to collapse
I don't have that problem. You do know that your device will wait till it drops some percentage before it starts charging again. It won't keep it at 100% the whole time... Is meant to conserve your battery life

smartadmin said:
I don't have that problem. You do know that your device will wait till it drops some percentage before it starts charging again. It won't keep it at 100% the whole time... Is meant to conserve your battery life
Click to expand...
Click to collapse
Let's pretend I've got just a little experience with portable devices. The standard is to float between 95 and 100% charge and just call it "charged" once it's bounced off 100% the first time.
Here's a test you can do that requires no time on your part. Set it up to play a long movie while it's plugged in. Look at the charge level after it's been going for a couple of hours. And you don't have to take my word for it. I'm hardly the only person complaining that the supplied charger is not capable of keeping up with the device's power requirements.

If you are seeing power drop during normal use while plugged in I'd talk to Google. You may have a defective unit. Mine doesn't do that and I regularly see 20+ hour days with normal use unplugged and usually with some video, browsing, games etc.
Take note off when you see the drop, how much you lose over a given amount off time and call Google and see if this is expected. I'm sure they will help. They have been very responsive when I've called.
Sent from my Nexus 10 using Tapatalk 2

groaner said:
If you are seeing power drop during normal use while plugged in I'd talk to Google. You may have a defective unit. Mine doesn't do that and I regularly see 20+ hour days with normal use unplugged and usually with some video, browsing, games etc.
Take note off when you see the drop, how much you lose over a given amount off time and call Google and see if this is expected. I'm sure they will help. They have been very responsive when I've called.
Sent from my Nexus 10 using Tapatalk 2
Click to expand...
Click to collapse
I will watch like 1 hour of Streaming Vid's and loose like 4-5% while plugged in.

100% brightness causes my device to use more power then what's being supplied from the wall charger, and a few other people have confirmed similar incidents as well.
Max your brightness, and then go play a 3D game, while being plugged into the wall charger, and watch the percentage drop still

My tablet lasts a few days at least before needing a charge. I plug it in over night and it charges to full. I couldn't be more happier with it considering it is not self-sufficient.

Mine drops a few % per hour in use with the stock charger connected. Brightness at 50%, WiFi on, BT off. I'm not going to whine about it, but its the only thing that's not great with this tab.
Sent from my Nexus 10 using XDA Premium HD app

Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
I've read on an Ipad forum that about 10-15 hours charging are normal (the Ipad 4 has a 42,5Wh battery), and their chargers give as much Watt as our Nexus chargers.
One thing is clear, you can't increase the voltage. That would kill your Nexus right away.
My Samsung charger I recieved with my Nexus 10 says 5V out and 2A.
5*2= 10W.
Isn't that the same rates that other tabs have, even if they got special chargers?
So, the only thing the POGO-charger could raise, is the amount of current.
Even if you had a 10A charger, if the Nexus cant use more than 2A, it wouldn't get anymore amps than 2.
If the kernel on the Nexus doesn't support any higher charger rates, then you cant change anything.
There is a reason why the manufacturers have set 5V as standard - to make it work together with USB.
Battery Specs: Samsung Li-Ion 3.75V 22.75Wh 9000 mah.
So, it's easy. If you had a 1W charger, it would take 22,75 hours to get a fully charged battery.
In theory, it should take 2,75 hours to fully charge the Nexus 10 battery, but we don't turn it off, we use it while charging, it uses background sync and I dont know what the efficiency rating is on the charger or the Nexus.
You know you could feel some heat on the back of the Nexus 10 after some usage?
That's some of the battery's energy that spoils into heat, meaning that there are power losses.
It's normal though, we don't have anything yet on earth that could convert 100% energy from one form to another.
You could compare it to a car, you need a cooler-system to remove the excessive heat from the engine.
Even if your Nexus is far more efficient.

Olaeli said:
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
I've read on an Ipad forum that about 10-15 hours charging are normal (the Ipad 4 has a 42,5Wh battery), and their chargers give as much Watt as our Nexus chargers.
One thing is clear, you can't increase the voltage. That would kill your Nexus right away.
My Samsung charger I recieved with my Nexus 10 says 5V out and 2A.
So, the only thing the POGO-charger could raise, is the amount of current.
Even if you had a 10A charger, if the Nexus cant use more than 2A, it wouldn't get anymore amps than 2.
Click to expand...
Click to collapse
Please do not speculate about how much current can go through the pogo connection. Speculation is worthless and helps nobody. The fact that the included charger only puts out 2 amps probably has to do with limitations of the USB connection. But I'm speculating. See how pointless that is? The fact that one connection is limited to 2 amps doesn't mean all power connections are limited to 2 amps.
And where did I say anything about increasing the voltage? I'm not an idiot and didn't suggest such a stupid thing.
As for temperature, that can easily be monitored during charging and the current can be reduced if it gets too high. You are aware that there is a temperature sensor for the battery, right?
None of which has a darn thing to do with my opinion that it's unacceptable to produce a device that uses more power than it can get from its AC adapter. If there really is no way to run the Nexus 10 at full tilt without supplementing the AC adapter with battery power, Samsung should have addressed that problem before going into production with this unit. This isn't a $150 entry level device. It's the Android flagship.

Olaeli said:
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
Click to expand...
Click to collapse
A person that supposedly has said charger mentioned that it seemed to charge faster.

jtown said:
Please do not speculate about how much current can go through the pogo connection. Speculation is worthless and helps nobody. The fact that the included charger only puts out 2 amps probably has to do with limitations of the USB connection. But I'm speculating. See how pointless that is? The fact that one connection is limited to 2 amps doesn't mean all power connections are limited to 2 amps.
And where did I say anything about increasing the voltage? I'm not an idiot and didn't suggest such a stupid thing.
As for temperature, that can easily be monitored during charging and the current can be reduced if it gets too high. You are aware that there is a temperature sensor for the battery, right?
None of which has a darn thing to do with my opinion that it's unacceptable to produce a device that uses more power than it can get from its AC adapter. If there really is no way to run the Nexus 10 at full tilt without supplementing the AC adapter with battery power, Samsung should have addressed that problem before going into production with this unit. This isn't a $150 entry level device. It's the Android flagship.
Click to expand...
Click to collapse
Please, you started speculating about a high-current POGO-charger that doesn't exist.
Sure, you didn't mention the voltage, but I ve seen comments about it before, so I just wanted to make it clear.
And I didn't say the temperature was a problem either, just that it lowers the efficiency of the charger and the device.
Samsung maybe didn't know there was a charging problem.
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
And I know, this is supposed to be a flagship, but what everyone forgets is that it's much cheaper than other brands.
I was looking forward to buy a ASUS TF700 with keyboard at almost twice the price as the Nexus 10 before I read about the Nexus.
Even if it doesn't justify the charging problem, you could try to adapt to the circumstances until there's a solution.
When I'm low on battery, I let the device charge and do something else for a change.
Sent from my Nexus 10 using xda app-developers app
Edit: If you look at the pictures of the POGO-charger that's across the internet, the charger is still only 5V, 2A.

Olaeli said:
Please, you started speculating about a high-current POGO-charger that doesn't exist.
Sure, you didn't mention the voltage, but I ve seen comments about it before, so I just wanted to make it clear.
And I didn't say the temperature was a problem either, just that it lowers the efficiency of the charger and the device.
Samsung maybe didn't know there was a charging problem.
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
And I know, this is supposed to be a flagship, but what everyone forgets is that it's much cheaper than other brands.
I was looking forward to buy a ASUS TF700 with keyboard at almost twice the price as the Nexus 10 before I read about the Nexus.
Even if it doesn't justify the charging problem, you could try to adapt to the circumstances until there's a solution.
When I'm low on battery, I let the device charge and do something else for a change.
Sent from my Nexus 10 using xda app-developers app
Edit: If you look at the pictures of the POGO-charger that's across the internet, the charger is still only 5V, 2A.
Click to expand...
Click to collapse
I have a nexus 10, nexus7, and a Tf700. I am noticing slightly faster charging on the n10 using the Tf700 ac adapter. The same is true when trying to charge my tf700. The stock samsung n10 ac adapter charges it slower than the asus transformer adapter. The same is true with my nexus 7 adapter. Ive used the n7 adapter to charge my tf700 and it was not as quick a charge. Meanwhile all 3 units are rated for 5v 2amp.

Olaeli said:
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
Click to expand...
Click to collapse
I wonder what all they did test if they somehow managed to miss that...
joe1l said:
I have a nexus 10, nexus7, and a Tf700. I am noticing slightly faster charging on the n10 using the Tf700 ac adapter. The same is true when trying to charge my tf700. The stock samsung n10 ac adapter charges it slower than the asus transformer adapter. The same is true with my nexus 7 adapter. Ive used the n7 adapter to charge my tf700 and it was not as quick a charge. Meanwhile all 3 units are rated for 5v 2amp.
Click to expand...
Click to collapse
Could be possible the N10 charger isn't actually putting out 2A? Might need a multimeter or something to verify for sure though...

I am currently out of town so keep in mind I didn't have a chance to dig too deep but I've given the kernel a quick look through.
There is no such thing as the "high current pogo charger." The pogo pins accept 2A max and appears to be ~5V. The USB connector has the same limits.
I also took a look at the current at the battery to make sure the charger was being detected correctly. My 1A Samsung non-Nexus 10 charger seems to supply ~900ma to the battery which is as much as you should expect out of a 1A charger. My Nexus 10 charger supplies ~1600ma to the battery. This number seems slightly low but at least indicates the charger is detected correctly.
*If* the pogo charger does indeed charge faster, it will likely be because the pogo charger is able to supply some current that is asymptotically closer to 2A. In other words, it will not charger much faster than the USB charger.
On the other hand, the pogo charger will still be nice to have as it will allow simultaneous usage of USB OTG and charging.
Like I said before, I was unable to dig very deep because I'm out of town and browsing sysfs and kernel source on a tablet isn't the best experience. So, the info I found might not be 100% correct.

dalingrin said:
There is no such thing as the "high current pogo charger." The pogo pins accept 2A max and appears to be ~5V.
Click to expand...
Click to collapse
Please show some proof/references for this statement.

Valynor said:
Please show some proof/references for this statement.
Click to expand...
Click to collapse
There are many indicators throughout the kernel but for brevity I'll post what I think is the most concise.
https://github.com/CyanogenMod/andr...ng/arch/arm/mach-exynos/board-manta-battery.c
Line 773-776
Sets the current to 500ma if USB is detected on the pogo or 2A if AC is detected.

Well if you're reading 1600ma using the standard ac adapter that comes with the N10 and possibly closer to 2000ma (say 1900ma) using the pogo, then that is 1/5 faster charging. In terms of time that is quite a saving.
Of course, that is all speculation

USB current limits
I thought I'd post this as information I found while doing a spot of light reading
The current specification of a USB 2.0 port can be a maximum of 1.8A. Within Constraints.
"Battery Charging Specification 1.1: Released in March 2007.
A usb charging port places a termination resistance between D+ and D- to allow the maximum 1.8A", meaning that at this current, there can be no data transmission.
This appears to be increased for USB 3.0 standard.
"Battery Charging Specification 1.2: Released in December 2010.
Several changes and increasing limits including allowing 1.5A on charging ports for unconfigured devices, allowing High Speed communication while having a current up to 1.5A and allowing a maximum current of 5A."
citations come from documents here:
http://www.usb.org/developers/devclass_docs
As POGO pins do not have to follow any specification the only limit is the current the board & charging circuit can handle.

Look at the specs on the wall plug in unit. It's not a charger it's a 5V power supply and the charger is inside the N10. However the charger is setup determines the charging rate. Like mentioned above, it may not matter if you "could" use a 10A at 5V power supply.

[Q] HTC One Restricted Charge Rate?

Here goes.....
I've been struggling with charging this phone. I have both the Sprint and the T-Mobile versions and I'm seeing the exact same thing with both. This phone simply won't pull more than roughly 600ma from a charger. With the best of equipment (chargers, cables, clean regulated power, etc etc) a ~600ma (+/- 15ma) is all I ever see at max draw.
I've tried all sorts of chargers including several stock. Same for cables. I know some cables are crappier than others and can restrict current....those that I found did that were tossed in the trash (don't want to keep the fubar cables anyway).
The phones have been in various states of operation too....from one extreme to the other....under heavy benchmark load to "first run" state from a complete reset (full wipe) with airplane mode on.
I said I have a "problem" above. What I mean is that my use-case is such that I use navigation with bluetooth streaming for podcast listening during my commute to and from work everyday. While I'm at work I plug into my TV to playback video podcasts via MHL. At best.....BEST....I can maintain my current state of battery. In other words, if I'm 39%, it'll stay thereabout when I'm plugged into a charger in either case.
No..."Power Saver" doesn't help. What I think would actually help is if power saver had the ability to disable some cores in addition to just governing to 1.1Ghz across all four.
To have a kickass phone that you really honestly can't truly kick ass with feels weird. This thing simply discharges faster than it can charge under any real world load. Maybe my personal use case is unconventional but I feel like it's not THAT unconventional seeing as that the features I use wouldn't be built in if no one ever used them, ya know?
I first noticed this behavior with my previous phone, the EVO 4G LTE. Even though the behavior was there, it wasn't as bad or noticeable due to what I think is the fact it was only dual core...maybe other factors too. But I'm not a developer/engineer so my observations are only from the outside looking in.
I know I can "tweak" my behaviors -- "...do this, or do that. Disable this, or disable that." I understand these things. But having to disable a bunch of things sorta goes against the idea of having this device in the first place.
At the end of day, my observations are my own and I know some are going to suggest I'm "holding it wrong" or whatever, but you guys gotta admit there's something up here with the very limited charge rate.
All that said, I still enjoy the phone. :angel:
PS - I've been using this to monitor current/voltage. The tool has been verified to be working properly by two EE's at my work.
http://www.amazon.com/Micro-SATA-Cables-Voltage-Current/dp/B005Z1E3IY

The stock charger. How much does that one show it pulls?
Because I have a 1a charger for my car and I can have the screen on the entire time and it charges, slower, but it charges.

Felnarion said:
The stock charger. How much does that one show it pulls?
Because I have a 1a charger for my car and I can have the screen on the entire time and it charges, slower, but it charges.
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Same same.....doesn't matter the charger capability. Peak draw at any one time seems to be roughly 600ma...+/-. As the charge of the phone gets closer to full, the rate tapers off to roughly 200ma and then to about 80ma as it gets really really close.
I know HTC is trying to protect the battery, but I really get the feeling that this is way over-protective.
I took a picture with my Sprint ONE of my T-Mobile ONE on a 2.1amp wall charger. Notice, at roughly 1/2 charge, it's only pulling about 600ma. Too daggon slow in my opinion.

dougxd said:
Same same.....doesn't matter the charger capability. Peak draw at any one time seems to be roughly 600ma...+/-. As the charge of the phone gets closer to full, the rate tapers off to roughly 200ma and then to about 80ma as it gets really really close.
I know HTC is trying to protect the battery, but I really get the feeling that this is way over-protective.
I took a picture with my Sprint ONE of my T-Mobile ONE on a 2.1amp wall charger. Notice, at roughly 1/2 charge, it's only pulling about 600ma. Too daggon slow in my opinion.
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I assume you mean a 2.1a charger from a Samsung product, that won't work. Samsung uses some signaling on the D+/D- wires to show "This is a Samsung product, charge at 2.1a"
HTC One does not have the ability to offer this signaling and thus will charge at usb rates of 500-600.
Some products short the data wires of the USB to signal that it can supply extra power. This is the type of signaling the HTC One can use. You would need a charger with this capability.
If you don't mind, if you could take a picture of the same setup with the stock charger, that would help.
EDIT: This particular device you've linked seems to block any signaling, according to the reviews on Amazon. I think your problem may lie there.

Felnarion said:
I assume you mean a 2.1a charger from a Samsung product, that won't work. Samsung uses some signaling on the D+/D- wires to show "This is a Samsung product, charge at 2.1a"
HTC One does not have the ability to offer this signaling and thus will charge at usb rates of 500-600.
Some products short the data wires of the USB to signal that it can supply extra power. This is the type of signaling the HTC One can use. You would need a charger with this capability.
If you don't mind, if you could take a picture of the same setup with the stock charger, that would help.
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I understand what you mean. Note that in all my rambling on about various cables and chargers, if I wasn't explicit, I was implicit in that I've tried HTC stock gear too. Same results, no matter.
I do own and did try a few Samsung chargers and cables in addition to the myriad of others. I'm aware of Samsung's irritating attempts to lock people into using their accessories, thus the signaling modifications, but wanted to try them anyway. That's why I used a whole bunch of different chargers and cables. Some are not-so-good and others are great. The one charger I prefer is from VENTEV. It's a dual-port 4.2amp (2.1/per) wallwart.
http://www.amazon.com/Ventev-Wall-Charger-Dual-2-1A/dp/B00BEJSRDI
What I'm saying overall is that the big picture here suggests that we can't pull more than the peak 600ma or so charge rate, no matter what combination of doo-dads you toss at the phone. I'm all in if HTC has some super-secret special vapor rub one can use to charge faster, but even the stock charger they give us in the box which supports 1AMP doesn't deliver that since the phone itself doesn't pull more than what I've seen.
In the attached pics, the one of the charger is the Ventev. The other three show my T-mobile ONE just hit 90% charge and the rate has dipped to about 400ma on average. I took three snaps to show that it does fluctuate a bit. It'll ramp down more at about 95% or so and even more at 99%...................ALL of which is to be expected, I know.
To be clear, at this point, and what you see in these pics, is the stock HTC wall charger that we all get in the box with the phone, the stock HTC microUSB cable, and the measuring tool that is plugged into charger which the cable is then plugged into to then charge the phone. The meter can handle just over 2amps before it pops the internal fuse.
-Doug, KG3EK

dougxd said:
I understand what you mean. Note that in all my rambling on about various cables and chargers, if I wasn't explicit, I was implicit in that I've tried HTC stock gear too. Same results, no matter.
I do own and did try a few Samsung chargers and cables in addition to the myriad of others. I'm aware of Samsung's irritating attempts to lock people into using their accessories, thus the signaling modifications, but wanted to try them anyway. That's why I used a whole bunch of different chargers and cables. Some are not-so-good and others are great. The one charger I prefer is from VENTEV. It's a dual-port 4.2amp (2.1/per) wallwart.
http://www.amazon.com/Ventev-Wall-Charger-Dual-2-1A/dp/B00BEJSRDI
What I'm saying overall is that the big picture here suggests that we can't pull more than the peak 600ma or so charge rate, no matter what combination of doo-dads you toss at the phone. I'm all in if HTC has some super-secret special vapor rub one can use to charge faster, but even the stock charger they give us in the box which supports 1AMP doesn't deliver that since the phone itself doesn't pull more than what I've seen.
In the attached pics, the one of the charger is the Ventev. The other three show my T-mobile ONE just hit 90% charge and the rate has dipped to about 400ma on average. I took three snaps to show that it does fluctuate a bit. It'll ramp down more at about 95% or so and even more at 99%...................ALL of which is to be expected, I know.
To be clear, at this point, and what you see in these pics, is the stock HTC wall charger that we all get in the box with the phone, the stock HTC microUSB cable, and the measuring tool that is plugged into charger which the cable is then plugged into to then charge the phone. The meter can handle just over 2amps before it pops the internal fuse.
-Doug, KG3EK
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Click to collapse
I was directed here from another section of the forum. Have you tried using this?
https://play.google.com/store/apps/details?id=ccc71.bmw
With the stock charger it's telling me that I'm pulling in just under 950mA during peak charging and tapering off as it gets full.

i used a samsung 0,7C charger and it charges at a conntat +800 mah
the HTC chargers also sometime speaks a 900mah + but typically aroung 200 - 700 mah +
it seesm t fluctuate more often than the samsung which fluctuates to a lwoer range when bnearing 100% charge.

Dude, I have the same problem with my EVO LTE, exactly as you describe it, but for some weird reason, my car charger charges my phone normally while other chargers will take several hours to fully charge. I really hope it's a problem with the chargers and not our phones :thumbup: :thumbdown:
Sent from my EVO

Hi. So based on what people have posted, does this mean that there isn't much difference charging it from the wall socket and from a usb port in a computer? Since then charging rate is around 700-600mah and a usb charges at around 500mah
Sent from my HTC One using Tapatalk 4 Beta

http://androidcommunity.com/htc-one-doesnt-support-qualcomm-quick-charge-20130509/

So I download that app, and no matter what I do with my settings, I cannot get my phone to charger faster than about 550mAh. I am currently running at 384MHz CPU, 200MHz GPU, and Force Charge (On/Off), and 50mV undervolt. With the phone just laying there (screen on 65% battery), as I stare it currently saying +529mA (+23.00% /h).
I just tried playing a game, with those same exact settings and it stated charging at +217mah.
Edit: Was redirected here and didn't notice it was an old topic. sorry for reviving?

[Q] Nexus 6 turbo charger vs regular charger question

Hi, would a regular charger be better to use vs the turbo charger for the longevity of the battery? Would a regular charger work ok with this phone?
Thanks

pred8er said:
Hi, would a regular charger be better to use vs the turbo charger for the longevity of the battery? Would a regular charger work ok with this phone?
Thanks
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With the turbo charger the device gets pretty warm

Hard to say but I don't think the turbo charger would damage the battery since it actually only ships with it. I would be surprised if it is a problem.

The way I understand it is that the turbo charger will step down as the battery reaches a fuller charge.
You can use the turbo charger on older devices without issue as the circuitry will account for this.

joderme said:
The way I understand it is that the turbo charger will step down as the battery reaches a fuller charge.
You can use the turbo charger on older devices without issue as the circuitry will account for this.
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This

I don't think Qualcomm would design a charger that would speed up the life of a battery because that would give them a bad reputation. I've used the quick charger since I got my Nexus until today because now I use my TYLT qi charger. I have noticed no negative effects of using it, and as stated the chip set is what dictates the charging speed. The chip will not let the battery get too hot assuming the chip is working so I would not worry.

Pilz said:
I don't think Qualcomm would design a charger that would speed up the life of a battery because that would give them a bad reputation. I've used the quick charger since I got my Nexus until today because now I use my TYLT qi charger. I have noticed no negative effects of using it, and as stated the chip set is what dictates the charging speed. The chip will not let the battery get too hot assuming the chip is working so I would not worry.
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Also forgot that if the battery gets too hot charging will stop as Pilz mentioned above. I have seen this before on my SGS5 with wireless charging as it can generate a good amount of heat. I would imagine the Nexus 6 is the same.

Okay. A quick lesson on chargers may be in order.
What you'd consider a regular 2A charger, is actually a "Quick Charge 1.0" charger, which charges at 5V @ 2A, for a total of 10W of power. A Quick Charge 2.0 charger, which Motorola calls a "Turbo Charger" charges at 5V, 9V, and/or 12V @ up to 3A each, for a total of 15, 27, of 36W respectively. Thus, in theory, a QC2.0 could charge up to (almost) 75% faster than a QC 1.0 charger. That's where that number that's being touted around comes from. The reality, so far though, is far different.
The Moto charger does actually charge at all three voltages (whereas most QC 2.0 charger only seem to charge at 5V and 9V), but it charges @ 1.6A in 5V mode (8W), 1.6A in 9V mode (14.4W), and 1.2A in 12V mode (14.4W). Thus, in the top two modes, it charges at just under the equivalent of a 3A "normal" (QC 1.0) charger, then drops down to about 80% of a standard 2A charger when the battery gets close to full.
With more power (watts) comes more heat, so yes, the battery does appear to get a lot warmer than with your normal charger. However, it's still well within the "normal" range that your battery was designed to handle. It may feel warm (or even hot) to you, but trust me, your battery is fine. In fact, there are safeguards in place to protect your battery. If you battery ever gets too hot, your phone will shut down and stop charging altogether. Some owners of a Tylt Vu can attest, since that particular charger has a reputation of wireless charging problems that caused the phones' safeguards to kick in. You should know though, that by the time that safeguard even kicks in, the phone will become MUCH too hot to touch. If you THINK that the phone is too hot, then it isn't. Believe me, the blisters on your fingers will let you know when a battery REALLY reaches a dangerous temperature. If you're able to hold onto the phone for more than a few seconds, then the battery is certainly not in any danger.
In a normal QC 2.0 charger, will that small amount of excess heat reduce the life of your battery? Technically, yes, but the same can be said about charging it with that 2A charger, vs. the 500mA USB port on your computer. It may reduce the life by a month or so, and still last more than double the 1 or 2 years that you're likely to own your phone. In short, don't worry about it. Your battery will likely still last MUCH longer than you'll need it.

Thnx for all the input!

jt3 said:
Okay. A quick lesson on chargers may be in order.
What you'd consider a regular 2A charger, is actually a "Quick Charge 1.0" charger, which charges at 5V @ 2A, for a total of 10W of power. A Quick Charge 2.0 charger, which Motorola calls a "Turbo Charger" charges at 5V, 9V, and/or 12V @ up to 3A each, for a total of 15, 27, of 36W respectively. Thus, in theory, a QC2.0 could charge up to (almost) 75% faster than a QC 1.0 charger. That's where that number that's being touted around comes from. The reality, so far though, is far different.
The Moto charger does actually charge at all three voltages (whereas most QC 2.0 charger only seem to charge at 5V and 9V), but it charges @ 1.6A in 5V mode (8W), 1.6A in 9V mode (14.4W), and 1.2A in 12V mode (14.4W). Thus, in the top two modes, it charges at just under the equivalent of a 3A "normal" (QC 1.0) charger, then drops down to about 80% of a standard 2A charger when the battery gets close to full.
With more power (watts) comes more heat, so yes, the battery does appear to get a lot warmer than with your normal charger. However, it's still well within the "normal" range that your battery was designed to handle. It may feel warm (or even hot) to you, but trust me, your battery is fine. In fact, there are safeguards in place to protect your battery. If you battery ever gets too hot, your phone will shut down and stop charging altogether. Some owners of a Tylt Vu can attest, since that particular charger has a reputation of wireless charging problems that caused the phones' safeguards to kick in. You should know though, that by the time that safeguard even kicks in, the phone will become MUCH too hot to touch. If you THINK that the phone is too hot, then it isn't. Believe me, the blisters on your fingers will let you know when a battery REALLY reaches a dangerous temperature. If you're able to hold onto the phone for more than a few seconds, then the battery is certainly not in any danger.
In a normal QC 2.0 charger, will that small amount of excess heat reduce the life of your battery? Technically, yes, but the same can be said about charging it with that 2A charger, vs. the 500mA USB port on your computer. It may reduce the life by a month or so, and still last more than double the 1 or 2 years that you're likely to own your phone. In short, don't worry about it. Your battery will likely still last MUCH longer than you'll need it.
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Very nice, thanks for this :good:

@jt3 Thanks for the explanation. I would think the voltage somehow plays a part in this, right? As you pointed out, if you look at straight watts, our Quickcharger is only putting out 44% more power versus a last gen phone. Also, since our charger supports both 9v and 12v at 14.4W, that further points to the idea that voltage plays a part here. I would assume it affects the efficiency of the charge? Otherwise why not just build this with 5v and 3 or 4 amps?

TheSopranos16 said:
@jt3 Thanks for the explanation. I would think the voltage somehow plays a part in this, right? As you pointed out, if you look at straight watts, our Quickcharger is only putting out 44% more power versus a last gen phone. Also, since our charger supports both 9v and 12v at 14.4W, that further points to the idea that voltage plays a part here. I would assume it affects the efficiency of the charge? Otherwise why not just build this with 5v and 3 or 4 amps?
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Yes and no. The reason for changing the voltage instead of the current has to do with something called Joule Heating, and if you thought my last post was technical and complicated, you just dropped down the rabbit hole.
Think of it like a garden hose. Voltage would be the diameter of the hose. Current would be the rate in which water flowed through the hose. If, say, you wanted to fill your dog's water bowl, and for some insane reason, you want it to take exactly 30 seconds to do so. You could either get a larger diameter hose, and turn down the flow of water, or get a smaller diameter hose and turn up the flow. In the end, the dog's bowl gets filled in the same amount of time. (Electrical Engineers will likely gripe and say that the diameter of the hose is more accurately Resistance, rather than Voltage. Yeah, well... shut up! This is my story! Seriously, I'm being a bit inaccurate, but it makes it easier to picture this way.)
Same thing here. By cranking up the voltage (volts), they can turn down the current (amps) to achieve the same power (watts). In the case of the 12V vs. 9V on the Turbo Charger, it's the same exact power, which doesn't seem to make sense, and furthermore (as you said), why not just keep it 5V and raise current to 3A, since that's also (more or less) the same amount of power? Okay, remember that dog bowl? what happens when you really crank the water flow and point it toward that dog bowl? It splatters, and because of this, a measurable amount of water actually ends up outside of the bowl -- wasted. Same thing here. By cranking up the current, you lose more in the form of heat. By dialing that down (but keeping the power the same, by raising the voltage), you can reduce the heat generation at the same power level.
So... The "tl;dr" of it all is that a 12V charger, pushing (around) 15W of power generates less heat than that 5V, 3A charger would, even though the power is the same. The heat generated isn't huge at these small numbers, but we're talking REALLY confined spaces, with no fans or really any form of ventilation. A few degrees here and there can really make a difference.