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Does anyone know why does my phone always overheat when I charge it? My wifi is off, and basically killed all my running apps.
This doesn't happen on my friend's nexus one.
By the way, I'm on FRF91 at&t. Anyone mind helping me with this? It would be greatly appreciated.
Sent from my Nexus One using XDA App
What do you mean by overheating? Like turns off, bursts into flame, "feels hot"?
There's greater heat if you charge via USB as opposed to the wall charger. Did you both use the same charging methods?
Quelltextfabrik said:
There's greater heat if you charge via USB as opposed to the wall charger. Did you both use the same charging methods?
Click to expand...
Click to collapse
Why does a usb cable heat up more than a "rapid charger" i thought the usb charged half as fast.
It would be logical to assume that less energy would produce less heat,
Please explain
Mine was also cooking on the charger. But after I switched to undervolted kernel the heat is not as high anymore.
android01 said:
Why does a usb cable heat up more than a "rapid charger" i thought the usb charged half as fast.
It would be logical to assume that less energy would produce less heat,
Please explain
Click to expand...
Click to collapse
I believe that the reason would be that USB has constant current, while rapid charger "pulses" the current, making the charging much more effective.
Sindroid said:
Mine was also cooking on the charger. But after I switched to undervolted kernel the heat is not as high anymore.
Click to expand...
Click to collapse
How do you undervolted the phone?
The temperature of my phone can go up as hot as 41C when I'm using the wall charger. But I charged it using the USB cable, it does not get hot at all.
So, is it possible that my wall charger is broken?
Only 41C? Don't worry about it then.
krad1992 said:
How do you undervolted the phone?
The temperature of my phone can go up as hot as 41C when I'm using the wall charger. But I charged it using the USB cable, it does not get hot at all.
So, is it possible that my wall charger is broken?
Click to expand...
Click to collapse
41C is nothing to worry about really. You should only be concerned if it went over 60C and even then it's mostly the battery that's paying the price.
Ah well... All my previous phone never reached that hot when it's charged.
I'm relieved that it's normal to reach 41C when charging then.
Thanks guys.
Quelltextfabrik said:
There's greater heat if you charge via USB as opposed to the wall charger. Did you both use the same charging methods?
Click to expand...
Click to collapse
No, there's not............ Sheesh.
khaytsus said:
No, there's not............ Sheesh.
Click to expand...
Click to collapse
Yes, there is a difference. Since the capacity charge is definitely different (5 V @ 500 mA vs. 5 V @ 1 A) there needs to be some sort of transformation in the power supply of the Nexus One. And transformation always releases heat.
Since the Nexus One and the Desktop Dock ship with a charger, this seems to be the preferred charging method and it makes sense that the phones power supply was designed to reflect that.
From my own experience I can say that my Nexus One get's very hot when charged via USB and almost no heat increase occurs when I charge it with the wall charger. But there might be a difference for users with 110 V ~ in their sockets.
Also check out the Li-Ion Battery guide, krad1992.
I also noticed that the phone gets a little hot when charging it. But I think that is natural. Also, it wasn't as extreme as you put it, where it would "overheat," instead I could notice that the phone was warmer when placed in the hand, especially in the lower bottom corner. But it never overheats...
If the heat worries you, you could always installed SetCPU (on a rooted device, of course) and set a profile to scale the processor speed down when charging, and I believe the newer versions of that app even let you set a different profile for charging via USB versus AC.
Quelltextfabrik said:
Yes, there is a difference. Since the capacity charge is definitely different (5 V @ 500 mA vs. 5 V @ 1 A) there needs to be some sort of transformation in the power supply of the Nexus One. And transformation always releases heat.
Since the Nexus One and the Desktop Dock ship with a charger, this seems to be the preferred charging method and it makes sense that the phones power supply was designed to reflect that.
From my own experience I can say that my Nexus One get's very hot when charged via USB and almost no heat increase occurs when I charge it with the wall charger. But there might be a difference for users with 110 V ~ in their sockets.
Also check out the Li-Ion Battery guide, krad1992.
Click to expand...
Click to collapse
OMFG, nonsense FUD. 5V is 5V. The phone only draws 500mAh when a 'USB' charge is detected, vs drawing 1Ah when an 'AC' charge is detected. The power supply is not pushing power into the device.
I'm not disagreeing that your phone gets hot when charging with a slow charge, but your assumptions are total nonsense and it's not normal.
Maybe you have some software doing something weird when USB is plugged in charging.. Ever tried shutting the phone down and plugging it on USB and seeing if it also gets hot?
khaytsus said:
OMFG, nonsense FUD. 5V is 5V. The phone only draws 500mAh when a 'USB' charge is detected, vs drawing 1Ah when an 'AC' charge is detected. The power supply is not pushing power into the device.
I'm not disagreeing that your phone gets hot when charging with a slow charge, but your assumptions are total nonsense and it's not normal.
Maybe you have some software doing something weird when USB is plugged in charging.. Ever tried shutting the phone down and plugging it on USB and seeing if it also gets hot?
Click to expand...
Click to collapse
That might be a little harsh...
My phone ALWAYS gets hotter charging from USB (and especially from a USB cable plugged into a non-HTC 1, 1.6 or 2A wall charger).
The phone detects whether it should be in AC or in USB mode based on whether it a couple of the pins are shorted in the cable (this has been confirmed by people taking hotknives to their chargers). If it detects USB mode, it only draws about 450mA. In AC mode (thus, if it sees shorted pins, like in the stock HTC chargers), it'll draw somewhat (slightly) less than 1A.
I think that imperfect quality control or imperfect engineering on the phone might cause some drawn current to escape as heat when in USB mode, but not to while in AC mode.
This does not (at least for me) seem to be a software issue, because I have seen the EXACT SAME BEHAVIOR on CM 5.0.5, CM 5.0.6, CM 5.0.7(.x), CM 5.0.8, FRF50, FRF83, FRF85b, FRF91 and CM6 (both nightly and RC1). I've tried out dozens of kernels, and the problem seems to be a LITTLE better on more fiercely UC'd versions.
Plugging into USB and charging ALWAYS causes my phone to become warm or hot to the touch (after 30min to 1Hr, of course). After a good while, temps go on up to 34-39 on USB, with very little user activity or screen use, versus 29-32 when in AC mode. I have never had the slightest PROBLEM linked with this issue - that level of heat just isn't bad for something designed to work in the sun, sit in your pocket all day, etc.
I can confirm that this is also a problem on an HTC Desire - both the IDIOTIC self-limiting AC/USB regulator and the heat-while-charging-USB issue.
The AC/USB logic used by the phone is the most user-unfriendly thing I've ever seen on a phone, because it is MUCH too strict. It is solely designed to get you to buy "official" HTC fast chargers, rather than letting you use third party gear.
My Milestone would charge (and draw) fast from any old wall bump that could feed enough juice. iPhones do it. My BlackBerry Bold would draw well over 1A and fully charge in less than an hour off of anything that fed enough juice. But my fantastic "superphone" can't do this? That is really the ONLY thing I don't like about the N1 - and it will probably stop me from ever buying an HTC phone again, since I have confirmed exactly the same behavior on other models. Here's why:
If my wife and I travel with our kids, with multiple USB-charged and powered devices, I either have to bring both my US-only N1 charger AND an adapter (we live in France) PLUS another USB source (like a 2-in-1 or a 4-in-1) and cables, OR I can just bring the other source and count on 7 hours a day with my phone plugged into the wall, since 450mA is crap. And all of this is because HTC wants me to buy and use their chargers - which do not accept USB plugs like Moto's, Apple's, third-party, etc.
Quelltextfabrik said:
Yes, there is a difference. Since the capacity charge is definitely different (5 V @ 500 mA vs. 5 V @ 1 A) there needs to be some sort of transformation in the power supply of the Nexus One. And transformation always releases heat.
Since the Nexus One and the Desktop Dock ship with a charger, this seems to be the preferred charging method and it makes sense that the phones power supply was designed to reflect that.
From my own experience I can say that my Nexus One get's very hot when charged via USB and almost no heat increase occurs when I charge it with the wall charger. But there might be a difference for users with 110 V ~ in their sockets.
Click to expand...
Click to collapse
Well. Mine is the other way round. When I charged it with my USB cable, it doesn't get hot at all. But, it gets very hot when I charge with the wall charger.
Sent from my Nexus One using XDA App
Quelltextfabrik said:
There's greater heat if you charge via USB as opposed to the wall charger. Did you both use the same charging methods?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=727067
You voted yet? My results from today are even lower than that of yesterday, but my house is colder than my office.. Wife likes it frigid.. 27C charging on USB today.
Maybe you are using the phone while it's being charged, thus using the processor and producing heat?
I can leave mine on all day, and it doesn't get any hotter than a regular phone being charged. But if I have the OLED on and using processor, then it gets a little warmer.
The hottest I've seen mine get of 47 c, and that was because I was outside at the pool and the sun was killing it lol.
khaytsus said:
http://forum.xda-developers.com/showthread.php?t=727067
You voted yet? My results from today are even lower than that of yesterday, but my house is colder than my office.. Wife likes it frigid.. 27C charging on USB today.
Click to expand...
Click to collapse
I avoid charging via USB because the phone get's too hot for my taste. But I tried just now and it's around 39 °C in an ambient temp of around 23 °C.
khaytsus said:
OMFG, nonsense FUD. 5V is 5V. The phone only draws 500mAh when a 'USB' charge is detected, vs drawing 1Ah when an 'AC' charge is detected. The power supply is not pushing power into the device.
Click to expand...
Click to collapse
Though your slightly unkind post was answered sufficiently by big_adventure, I'd like to add something.
I suspect we both don't know how the input circuit of the Nexus One is designed, so it's pure speculation when we talk about how the power input is handled. HTC can be quiet fast with their hardware iterations, so we might even have different revisions.
But, the Nexus Ones Li-Ion needs a current of 1.4 A (1 C) until 4.2 V cell voltage are reached, ideally. The power the AC wall charger delivers fits in quiet well with almost no transformation. The maximum current the USB port can deliver is way out of the ideal range so there's the need for some more sweet magic in the circuits. And sweet electronic magic is connected to releasing heat.
However the input circuit is designed, there are definitely differences how the input of both charging methods is handled, causing varying levels of heat increase. Depending on what the engineers chose as their bias point. Tolerances have impact, of course and hardware revisions might have changed things. I'd like to be more specific but I have never designed a mobile phone charging circuit nor do I intend to disembowel my N1 for the sake of an argument
Caution: You may find speculation and assumptions but no FUD
Take care.
My phone charger broke and now it connects to the phone with a lot of difficulty, so I can hardly charge the phone. Do you happen to have any link to original charger where I can buy?
Here-
Amazon - http://www.amazon.com/Sony-Ericsson...?ie=UTF8&qid=1344437610&sr=8-1&keywords=ep800
eBay - http://www.ebay.com/itm/Original-So...ccessories&hash=item19ce80b4d1#ht_1477wt_1154
Just go down to any nearest Sony Ericsson service center, there you can get original charger..
Sent from my MIUI using xda premium
nightshroud.petrov7 said:
My phone charger broke and now it connects to the phone with a lot of difficulty, so I can hardly charge the phone. Do you happen to have any link to original charger where I can buy?
Click to expand...
Click to collapse
also can charge from other android phones charger. most of the androids has micro usb charging.
I charge my phone with my dad HTC wildfire S charger!:laugh:
I charge using BlackBerry charger, and it charged. :laugh:
When you use a charger for another device you must be sure that the Output Amperes are equal or less than the ones of the original charger
of your device because you will propably damage your device!!
KostasMD said:
When you use a charger for another device you must be sure that the Output Amperes are equal or less than the ones of the original charger
of your device because you will propably damage your device!!
Click to expand...
Click to collapse
MICROUSB are all same....(I think so)
sent from my W8 using xda app(paid/free doesn't matter)
Gogeta said:
MICROUSB are all same....(I think so)
sent from my W8 using xda app(paid/free doesn't matter)
Click to expand...
Click to collapse
no they are not all same
samsung provides 850mA current while our charger has 1A.
as our battery is 1200mAh we can give max 1.2A current to it (considering 1C discharge)
so i recommend to use any USB charger with 5V and 1A rating. apple chargers also use the same.
also buy a good company charger. dont use any china charger as they lack in overvoltage protection and all (i am not offending any chinese people in xda ).
and our PC USB port provides 5V 500mA, so we can use it also but it will take time to charge phone.
press thanks if helped.
mayurcools said:
no they are not all same
samsung provides 850mA current while our charger has 1A.
as our battery is 1200mAh we can give max 1.2A current to it (considering 1C discharge)
so i recommend to use any USB charger with 5V and 1A rating. apple chargers also use the same.
also buy a good company charger. dont use any china charger as they lack in overvoltage protection and all (i am not offending any chinese people in xda ).
and our PC USB port provides 5V 500mA, so we can use it also but it will take time to charge phone.
press thanks if helped.
Click to expand...
Click to collapse
jst a query.....doesnt our x8 charger(ep800 greenheart) outputs 850mA...???????
though charging with 1A provides fast charging.....good or bad?
vikalstha said:
jst a query.....doesnt our x8 charger(ep800 greenheart) outputs 850mA...???????
though charging with 1A provides fast charging.....good or bad?
Click to expand...
Click to collapse
every phone has built in charging IC and it provides high current with fast charging and when battery is about to charge full it reduces current and charges device normally so that there will not be any overcharging.
and our battery is LiPo not LiIon so we have advantages over more current draw and fast charging. also we can charge battery at ny time, it is not needed to charge it when battery is about to die to extend its life like in other batteries.
so you do not need to worry.
and my W8 original greenheart charger rating is 5V 1A
mayurcools said:
every phone has built in charging IC and it provides high current with fast charging and when battery is about to charge full it reduces current and charges device normally so that there will not be any overcharging.
and our battery is LiPo not LiIon so we have advantages over more current draw and fast charging. also we can charge battery at ny time, it is not needed to charge it when battery is about to die to extend its life like in other batteries.
so you do not need to worry.
and my W8 original greenheart charger rating is 5V 1A
Click to expand...
Click to collapse
thanks for d info....means i can charge my x8 with no mind-bugging query with other chrgers dat provide 1A?....woooooooooolaaaa...:highfive:
KostasMD said:
When you use a charger for another device you must be sure that the Output Amperes are equal or less than the ones of the original charger
of your device because you will propably damage your device!!
Click to expand...
Click to collapse
Quite wrong there.The only thing that will happen is that the phone will take longer to charge if the mAmperes are less than the original chargers.If they are more it wont have any problem or it may even charge faster depending on the internal charge controller.
Just so you keep it in mind, the mAmps a charger states, is the MAXIMUM it can provide, not the mAmps it FORCES into the device.Every device drains as much power as it is configured to drain when it was built.
Its the OUTPUT voltage you must be careful at, though every charger the last 8 years outputs 5-7 volts which is fine. :laugh:
@above
True.. The phone will only draw the power it requires even if the charger has a higher rating..
...
Use samsung charger, better battery life...
19LeoN94 said:
Use samsung charger, better battery life...
Click to expand...
Click to collapse
Well in this case you write nonsense ...
Sony Ericsson is the Sony Ericsson and not combined with other devices.
But if the charger fits why not a battery but it does not improve in the same way as other charges
tiestobunio said:
Well in this case you write nonsense ...
Sony Ericsson is the Sony Ericsson and not combined with other devices.
But if the charger fits why not a battery but it does not improve in the same way as other charges
Click to expand...
Click to collapse
Nonsense is not a very polite word, i d prefer inaccurate.
In this case both statements are wrong.There is no manufacturer constrain when using smartphones and chargers, as long as they both have the same plug (aka micro usb).
The chargers are not actually chargers, they are power supplies.As stated above each phone only takes the amount of power its charge controller IC dictates it to.So there is no better life with samsung charger nor SE for SE phones and not combining with other devices.
Use whatever charger you can find (as long as it is of some brand) and it will do the trick.If it says many mAs(like 1000 or more) good for, you, faster charge if the phone allows it, if it says less mAs you ll just have to wait more, but the battery wont get damaged, whatever charger you use!
Theorw said:
Nonsense is not a very polite word, i d prefer inaccurate.
In this case both statements are wrong.There is no manufacturer constrain when using smartphones and chargers, as long as they both have the same plug (aka micro usb).
The chargers are not actually chargers, they are power supplies.As stated above each phone only takes the amount of power its charge controller IC dictates it to.So there is no better life with samsung charger nor SE for SE phones and not combining with other devices.
Use whatever charger you can find (as long as it is of some brand) and it will do the trick.If it says many mAs(like 1000 or more) good for, you, faster charge if the phone allows it, if it says less mAs you ll just have to wait more, but the battery wont get damaged, whatever charger you use!
Click to expand...
Click to collapse
O rly?
According to your logic
There must be charger that charges X8 in just 1 minute :silly:
see boot animation without rebooting
Gogeta said:
O rly?
According to your logic
There must be charger that charges X8 in just 1 minute :silly:
see boot animation without rebooting
Click to expand...
Click to collapse
Why dont you grab a 70Ah charger and try and tell us your results then? :good:
In the meantime read carefully what i posted. i stated :' if the phone allows it". Meaning you can put a 2Ah charger but unless the phones charge controller allows it you cant charge in that rate.Ofc you shouldnt charge Lithium batteries with more than 1C in the first place but thats another story.
Finally i ve converted old cellphone chargers i had in a shelf to have USB output and they all work great, though they charge slower since they are 500mAh rated.
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.
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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?)
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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.
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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.
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Please show some proof/references for this statement.
Valynor said:
Please show some proof/references for this statement.
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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.
This might be the stupidest question i have ever asked in XDA forum but..... I really want to know the answer to make sure it won't do anything bad to my Z1.
I used galaxy note 2 charging adapter which is a bit stronger than the original z1 charger (1500mA Vs 2000mA) and found out that charging time difference is quite noticeable. i guess 500mA difference is huge.
Since I read few news that people were experiencing fire or explosion while they were charging (or something, which i don't know if it's 100percent true) i want to know if putting too much power is bad for the Z1.
the charge for z1 is 2A. You can plugin 3A, but it wont take that extra, can only accept max 2A.
Generally speaking having extra 1A wwill heat up device but wont cause fire, unless you put in 1000A then it will explode
long1988 said:
the charge for z1 is 2A. You can plugin 3A, but it wont take that extra, can only accept max 2A.
Generally speaking having extra 1A wwill heat up device but wont cause fire, unless you put in 1000A then it will explode
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wait..what?
.... my charger says 5.0vdc == 1500mA
choihan06 said:
I used galaxy note 2 charging adapter which is a bit stronger than the original z1 charger (1500mA Vs 2000mA) and found out that charging time difference is quite noticeable. i guess 500mA difference is huge.
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Use whichever charger you have. Using a 2A charger will of course decrease charge time. Using a 3A charger will do nothing for you, because phone only accepts 2A if I remember correctly.
long1988 said:
the charge for z1 is 2A. You can plugin 3A, but it wont take that extra, can only accept max 2A.
Generally speaking having extra 1A wwill heat up device but wont cause fire, unless you put in 1000A then it will explode
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Using a 1000A or 3A charger will not make a difference. Phone will not heat up more than using a 2A charger. The phone will draw those 2A and nothing more. Unless there's a custom kernel parameter we can change to increase charging current.
choihan06 said:
wait..what?
.... my charger says 5.0vdc == 1500mA
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That is correct. Stock supplied charger is 1.5A, at least in the scandinavian countries.
I charge my Z1 with N7 charger (2.0) and everything is O.K.
Just like guys said - Z1 can use up to 2.0 and it's perfectly safe to use it but make sure charger is good, if you use junk for 1$ you could damage your device.
If we gave 1000$ for device we can pay 10$ more for good charger.
Sent from my Z1
I only ever use the 1.5A factory charger if I'm leaving it overnight. Its too slow otherwise so I also use a 2A charger from my Asus transformer
Hey you who pretend to know it all, let me clarify
You are saying the official charge is 1.5, but also say it take 2a as well, let me ask you, why do you think the phone can only overcharge up to 2 a and not to 3a as you were denying me?
My charger say it is 2a, it is official, dont being rude and frankly deny other opinion, at least try "from my poimt of view"
Sent from my C6903 using xda app-developers app
U might have a real special packaging as it usually comes with only 1.5mA
Also snapdragon 800 supports quickcharge 3.0 which allows chargers up to 4.0mA
These chargers will release in 2014
Hi,
Does anyone know why it is such a god damn crapshoot for charging speeds on the galaxy note 2 (or any samsung device for that matter).'
You buy a charger rated for 2amps and you never know what it will give you.
You buy a USB micro cable and get anywhere between 0.4amps and 1.6amps.
What is the criteria that the phone is using to determine how many amps to pull from the charger? How does it even know what gauge of wire it is? Is there some sort of resistance check?
I have a Galaxy Note 10.1 and that is even more particular than the GN2. With most aftermarket chargers, it absolutely refuses to charge. I've had so much trouble finding a charger for it I've just stopped using the tablet since I only have one working charger for it.
It really sucks spending anywhere between $2-$30 dollars on a charger and not knowing if it will work. My success rate has been less than 10%.
I try to do forum and google searches, but all I seem to find are comments like "I bought this charger. Seems to work." With no detailed information on what performance they are getting out of it.
This is really turning me off samsung products. I don't have this problem with my HTC or LG android devices.
I don't know why you have problems, I have 2 samsung devices (phones) and I chare them with their original chargers, charger from Nexus 7 and my old charger from Desire HD and all work just fine... ofcourse, the original one is the fastest, since it is 2A, HTC one is 750mA and Ativ S one is 500mA, N7 one is 1A....
dalanik said:
I don't know why you have problems,
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You kind of answer this for yourself, as follows:
dalanik said:
I have 2 samsung devices (phones) and I chare them with their original chargers, charger from Nexus 7 and my old charger from Desire HD and all work just fine... ofcourse, the original one is the fastest, since it is 2A, HTC one is 750mA and Ativ S one is 500mA, N7 one is 1A....
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Your stock charger is 2A. (about 1.5-2 hours to charge)
Your HTC charger is 750mA (about 4-5 hours to charge)
Your ATV charger is 500mA (no better than a computer port. 6-8 hours to charge)
This was my point. This IS my problem. Obviously the stock charger works at 2A, but with any other charger it is anyones guess as to what speeds you're going to get out of it. Even when they are specified to work at 2A, you are likely not going to get 2A out of it. The phone is so bloody fickle.
If there was some benchmark or specific set of criteria I could use when I purchase a new charger to know for certain if it will charge at 2A, then that would mitigate some of the problem at least. But right now, there is none as far as I can tell. When I purchase a charger, I literally have no idea if it will run at 2A with this phone.
I'm glad that you're not bothered by the slow charging speeds and are happy with <1A. I'm sure this works well for most people. It doesn't for me. I push my phone to the max (as I have every right to) and need a charger that can keep up.
Well, charging slowly is different to what you say i.e. "refusing to charge at all" etc. And of course I don't use Ativ's charger to charge N2 often, it would take ages But I use HTC's charger that is 750mA and it charges within 2 hours which is OK.
Anyways, the only solution for you is to buy BRANDED charger from a company you can trust not some cheap chinese, t should work just fine whether it gives 2A or 1.9A is really no big difference.
dalanik said:
Well, charging slowly is different to what you say i.e. "refusing to charge at all" etc. And of course I don't use Ativ's charger to charge N2 often, it would take ages But I use HTC's charger that is 750mA and it charges within 2 hours which is OK.
Anyways, the only solution for you is to buy BRANDED charger from a company you can trust not some cheap chinese, t should work just fine whether it gives 2A or 1.9A is really no big difference.
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Well, there are chargers that refuse to work. Especially with the Galaxy Note 10.1.
Cheap ebay chargers are a crapshoot, that much goes without saying. But there are many brand-name chargers that don't work at full speed, despite being rated for 2A.
Its not so much a charger thing as a samsung thing. While I'm not able to find specific criteria as to how/why the phone decides to charge at the speed it does (which is really the only question I had with this thread), I can tell you that there are many brand name products (monoprice, anker, ngear, etc) that are rated for 2A, but will not run at 2A with the samsung. They will usually run at 2A with other products though.
The more research I do, the more I highly suspect that this is a case of Samsung propriety. It looks like that they are deliberately throttling aftermarket chargers to force you to buy their overpriced samsung chargers. As I understand it, it has something to do with creating a voltage divider between two of the contacts, but every diagram I find shows a different wiring scheme. This would indicate that no one really knows for sure.
The one and ONLY question I have with this thread is to find out what criteria the N7100 uses to determine how much amperage to draw. I remain confident that no one will answer this question because it seems no one knows.
For the Note 2: there is a way to get a simple measurement of how much current is being pulled. Refer to this thread for the apk and more info.
alpha-niner64 said:
For the Note 2: there is a way to get a simple measurement of how much current is being pulled. Refer to this thread for the apk and more info.
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Thanks for posting this. I suppose I should have mentioned that I have this app already and it is incredibly useful. I also have this, which with only a few bizarre exceptions, reports the same as the app.
The more people who are aware of this app, the better. People who think that their aftermarket charger "works fine for me" are probably unaware of how much those chargers are under-performing.
I don't have the education to explain your situation your situation well. But it boils down the electrical engineering the the physics of electricity.
There are quite a few variables that all effect the charging of devices. First thing is what does the device require for charge input, which is both amps and voltage. For whatever reason, quite a few tablets require 15 volts versus 5, which is what most mobile phones need. I have this same issue with my ASUS Transformer Infinity pad. It requires 2.0amps with 15 volts. I have a Galaxy Note II with needs 2.0amps with 5 volts. Unfortunately, when I use my phone charger with the tablet, it puts out enough to trigger a charger is plugged in (turns on tablet if it is off), but not enough to trigger there is actual charging. It does charge it, but it's a trickle charge; basically if it using while plugged in, it only slows the battery depletion rate.
As for the charge output, now you're getting into build quality, resistance of the components of the charger itself and the USB cable being used.
And then depending the device, the pins used on the USB cable can have an effect too. This mostly occurs with tablets or proprietary cables because the pins may tell the hardware what kind of charger is being used, which may have built in limits for charging.
Hopefully that helps some.
lovekeiiy said:
I don't have the education to explain your situation your situation well. But it boils down the electrical engineering the the physics of electricity.
There are quite a few variables that all effect the charging of devices. First thing is what does the device require for charge input, which is both amps and voltage. For whatever reason, quite a few tablets require 15 volts versus 5, which is what most mobile phones need. I have this same issue with my ASUS Transformer Infinity pad. It requires 2.0amps with 15 volts. I have a Galaxy Note II with needs 2.0amps with 5 volts. Unfortunately, when I use my phone charger with the tablet, it puts out enough to trigger a charger is plugged in (turns on tablet if it is off), but not enough to trigger there is actual charging. It does charge it, but it's a trickle charge; basically if it using while plugged in, it only slows the battery depletion rate.
As for the charge output, now you're getting into build quality, resistance of the components of the charger itself and the USB cable being used.
And then depending the device, the pins used on the USB cable can have an effect too. This mostly occurs with tablets or proprietary cables because the pins may tell the hardware what kind of charger is being used, which may have built in limits for charging.
Hopefully that helps some.
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That last part is correct. I actually know enough about electrical circuits to be pretty sure it is the phone deciding how much power to pull.
Ohms law states that the amperage of a circuit is the voltage of the circuit devided by the resistance (in ohms).
USB circuits are almost universally 5 volts. I remember reading somewhere that a phone has a potentiometer that protects it from circuits of incorrect voltage, up to a certain amount. This is probably why you can get away with sticking a 15V charger onto your phone and not blowing it up. You cannot depend on this however. Generally, you do not want to stick a charger into your device that is a different voltage rating than what the charger is rated for.
The charger decides the voltage, using an internal device that changes AC voltage (120VAC if youre american) to 5VDC (USB) or whatever your device needs. This device is called a rectifier.
As stated above, the charger decides the voltage. The battery determines the resistance*, therefore the amperage is the natural result of deviding the voltage by the resistance.
*Resistance is added to the circuit by the wire and the charger itself, but is usually inconsequential.
When a charger says that it is rated for a certain amperage, that means that it is the maximum amount of current that thr internal components can handle safely, without running the risk of earth-shattering kabooms (fire). If the circuit you have connected to your charger contains too little resistance, you will increase the amperage (ohms law, as stated above), and you may end up with a piece of charcoal where your charger used to be.
Thr fact that the samaung phones can change the amperage of a charging circuit so fickly must mean the phone is capable of changing its resistance. So the question becomes, what criteria is it using to determine when to change the resistancr and to what?
-PW
This may be the longest thing ive ever typed on my phone.
I'm not disagreeing since, as you said, the mobile device manufactures have build in some safe guards so we don't fry them from incorrect chargers or over charging.
But there are charges that are 15v. I've have one that came with my ASUS Transformer Infinity Pad. I think many Samsung tablets are in the same boat. I don't recall using that charger on any of my smartphones; if I have, it's only been once or twice, but good possibility I may never have. But as stated earlier, I have used my phone chargers on the tablet, but only does a trickle charge. That tablet has some wide input plug at the end of the USB cord. I'm thinking one of the pins must not get enough power to trigger the full charge. Yet, if I use my Anker external battery, set it to 15v, and a few adapters, it triggers the normal charge cycle.
Don't forget,phones such as Galaxy Note 2, Galaxy S3, use 11pin microUSB ports versus the standard 5. I have no idea what all pins do or trigger, My assumption, part of your answer why the charge output varies lies with how they're use the other pins. I know quite a few tablets have more than 5 pins since the USB port is some wide thing; the ASUS does because it carries data and power for the separate keyboard that can be attached to be a suedo-laptop that has USB ports, battery and full 104 key keyboard; I don't recall what other ports the attachment may have.
I still hold that part of charge difference is also the USB cord itself since difference materials have difference resistance. It may not be as significant as the charger itself, but I've seen significant differences in charging times or depletion rates (around 10% battery per hour) using MHL adapters purely on the USB cables.
Yes, typing out long replies on the phone's virtual keyboard blows monkey chunks. Thus, I use a blue tooth keyboard instead for those situations. I also have a blue tooth mouse, LOL.