I'm a recently new owner of the note. One of the first things I noticed was battery issues.
First, it seems as though my battery charges exceptionally slow regardless of whether I charge through a mains outlet or my computer. There have been times when I am charging and playing a CPU-intensive game and my battery power actually goes down, and once as a test I brought my battery to 4% and then let it charge overnight, and woke up to it at 90%.
second, I am running it rooted on the stock rom (kk4 I think?) and I am wondering if there are any system tweaks that improve performance and battery life, such as build.prop modifications. I am not a new Android user so I already know about reducing brightness, managing push services, all that stuff.
Sent from my GT-N7000 using XDA App
Note takes almost 4 hours to charge 100%. i guess you are using original Note Charger. Try flashing any new kernel and new ROM.
So it's because of the original charger? I still have my Dell Streak charger that outputs through USB, and I remember if I charged through the mains it would go much faster, though I am unsure of it's safety. As long as it's USB there's no risk of it frying my note, is there?
I sort of want to hold off on flashing a new rom until ISC becomes available in a mostly-working state. I am sure there are a few entries in build.prop that all the custom roms use?
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gilrad said:
So it's because of the original charger? I still have my Dell Streak charger that outputs through USB, and I remember if I charged through the mains it would go much faster, though I am unsure of it's safety. As long as it's USB there's no risk of it frying my note, is there?
I sort of want to hold off on flashing a new rom until ISC becomes available in a mostly-working state. I am sure there are a few entries in build.prop that all the custom roms use?
Sent from my GT-N7000 using XDA App
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The only risk is Amperage. A Dell Streak wall wart spits out 5V DC at 1A current. I use the very same to charge my Note, with no issues at all. I am unsure what the stock Note wall wart spits out as, to be honest, I never took it out of the packet. I would hazard a guess that it would be identical to the Galaxy S II charger at 0.7A, though. This would explain the slower charging rate you're noticing.
It may be a purely superstitious thing on my part, but I never charge mobile devices with anything over 1A of current unless they specifically require it.
I have a 2A wall wart at home that did crazy things to an old Desire (warmed the back very noticeably and subsequently impaired the battery's ability to hold charge). It's for this reason I stick to 1A, plus I find it quick enough for my liking.
Best of luck with a solution
I use the stock charger. It is 1A. It also charges quite slowly compared to some. There is a lot of juice needed to fill the Note's battery. Unlike some 1200 or 1600 mAh, it takes 2600 mAh. That takes time, is all.
---------- Post added at 06:31 AM ---------- Previous post was at 06:29 AM ----------
BTW using the Note, especially for gaming, can drain the battery faster than the charger tops it up. It appears the Note does not (or cannot?) draw anything from the power input to leave the battery to charge. The result is not a good or fast charge IMO.
I would not recommend doing this often as it tends to stuff up the metrics and give false readings in my experience.
jeromepearce said:
I use the stock charger. It is 1A. It also charges quite slowly compared to some. There is a lot of juice needed to fill the Note's battery. Unlike some 1200 or 1600 mAh, it takes 2600 mAh. That takes time, is all.
---------- Post added at 06:31 AM ---------- Previous post was at 06:29 AM ----------
BTW using the Note, especially for gaming, can drain the battery faster than the charger tops it up. It appears the Note does not (or cannot?) draw anything from the power input to leave the battery to charge. The result is not a good or fast charge IMO.
I would not recommend doing this often as it tends to stuff up the metrics and give false readings in my experience.
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Your second point especially is very valid. This wouldn't be the first device unable to 'keep up' with juice demands while flat out
Sent from my Galaxy Note using XDA Premium
Personally, I prefer a slow charge to a fast charge. Less chance of heating up the battery.
A 2 amp charger can charge the note slightly faster (the iPad charger for example)
Sent from my GT-N7000 using Tapatalk
slow charge is a perfect charge.
mfractal said:
A 2 amp charger can charge the note slightly faster (the iPad charger for example)
Sent from my GT-N7000 using Tapatalk
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How is that when the kernel only allows 1A.
EarlZ said:
How is that when the kernel only allows 1A.
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not sure how is that, all i can tell you is that i compared charging from 0 to 100 with the original charger and with a 2 amp one. Original charging time was 3:35, while the time with the 2 amp charger was just under 3 hours.
Remember also that a standard USB 2.0 port allows a max of 0.5A: "A device may draw a maximum of 5 unit loads (500 mA) from a port in USB 2.0" http://en.wikipedia.org/wiki/Universal_Serial_Bus
So when you charge the note using a PC (or a MAC) the process takes twice as long compared with wall charger. And if you're using the Note during the charge usually it won't charge at all, because it requires more power than it is supplied by USB port.
The note uses a Summit smb136 to charge... That chip can handle up to 1400mA in, and 1500mA to the battery. I don't have my Note yet to tinker much with the kernel sources, but I've worked with this chip on the galaxy tab 7.0 Plus (and have it doing some interesting things.)
Examining the source, it appears that the chip is being limited to 950mA from the wall charger and 500mA from all other sources. Depending on how it's detecting the charge source, it's likely limiting to 500mA for all "unknown" charging sources. (I'll investigate that after I've had the note for a couple days and get a feel for it.)
It should be easy enough to modify the kernel to allow more power draw from iphone/ipad chargers... and even to open up USB charging some more (but there's a risk involved with drawing too much current from a source than isn't designed for it. I've killed a netbook's usb port that way.)
Take care
Gary
Related
Just got a griffin powerjolt micro, comes with an ipod cable so you'll have to use your own, but it charges the streak up a treat
Think it was 12 pounds from amazon.
It's designed for iPads, which need 2 amps, it's rated for 2.1 amps. Charged from 30 to 60% in 20 mins while using gps.
Hope that's useful .
Sent from my Dell Streak using XDA App
For battery life is better to charge with low amps and for a long time. I would prefer ,not to use a charger with more than 1A
i got myself te belkin 1A charger. Should work good I guess.
As mentioned in the other thread, both these two work just fine :
https://www.dealextreme.com/p/car-p...cable-charger-set-for-apple-ipad-12-24v-45227
https://www.dealextreme.com/p/car-cigarette-powered-1000ma-usb-adapter-charger-black-dc-12v-40470
$6 or $2 including free shipping worldwide. You'll need the Streak's USB cable to connect it.
Anbuch said:
For battery life is better to charge with low amps and for a long time. I would prefer ,not to use a charger with more than 1A
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The car charger does not force power into the phone, the phone draws what it needs. Using a power supply with a higher Amp rating means less strain on the charger not more power than is needed going into the phone.
Sorry for my bad English, I guess you do not understand what I mean.
You're right that the car charger with more amps does not force more power into the phone (I do not say that),but if you use a charger with more amps , charging time is less. The battery prefers long time charging with less charging amps. In fact using less charging amps ,the battery allowed to load more power (a little bit ). You can try it by using a USB port of yours computer to charge the battery.
Anbuch said:
Sorry for my bad English, I guess you do not understand what I mean.
You're right that the car charger with more amps does not force more power into the phone (I do not say that),but if you use a charger with more amps , charging time is less. The battery prefers long time charging with less charging amps. In fact using less charging amps ,the battery allowed to load more power (a little bit ). You can try it by using a USB port of yours computer to charge the battery.
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Maybe it's just me, but what you are saying is exactly the same thing.
If the charger isn't forcing more power into the phone, then the charging time will not change. If the battery is receiving less current then what it was designed, such as a low powered USB port, then it would take longer then normal to fully charge. But once the charger puts out the amount of current that the battery will normally draw, the battery will only charge at that rate. Increasing the current beyond that amount will not speed up the charging time or push more current to the battery.
brianlp said:
If the battery is receiving less current then what it was designed, such as a low powered USB port, then it would take longer then normal to fully charge. But once the charger puts out the amount of current that the battery will normally draw, the battery will only charge at that rate. Increasing the current beyond that amount will not speed up the charging time or push more current to the battery.
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Anbuch is trying to say that the battery will last longer in the first scenario - the longer, slower charge from the low powered USB port.
Quicker battery charging does degrade the cells in less time - if you were to always use a 500mA charger, you would get more life from the battery than if you were to always use the stock 1000mA charger.
You can pick up a replacement battery from eBay for $10, so none of this really matters - when your battery wears out in 18 months, just buy a new one.
Nomgle ,thanks, this is exactly what I wanted to say!
I just gave an example with a USB port. In fact a USB port and a stock 1000mA charger are save enough for the battery of a Streak (1530mA). I just wanted to say : Do not use 2100 mA charger
Flinx78 said:
.... it's rated for 2.1 amps. Charged from 30 to 60% in 20 mins while using gps....
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This will "kill" the battery very soon
Some battery reading:
Understanding lithium-ion
Charging lithium-ion batteries
How to prolong lithium-based batteries
From the last page linked:
[FONT=Arial, Helvetica, sans-serif]Generally speaking, batteries live longer if treated in a gentle manner. High charge voltages, excessive charge rate and extreme load conditions will have a negative effect and shorten the battery life. This also applies to high current rate lithium-ion batteries.
Not only is it better to charge lithium-ion battery at a slower charge rate, high discharge rates also contribute the extra wear and tear.[/FONT]
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.
I use a black&decker converter and it has a usb port already built into it and that works pretty good for me.
Sent from the phone killer of ALL phone's, Dell Streak!
I just wanna ask if is it just OK to use a SAMSUNG CHAMP DUOS charger on a NOTE? Same with using a NOKIA E72 MICRO USB CABLE for PC CONNECTIVITY on a NOTE? Because when I tried it both are working fine. I am just worried that my NOTE will get damaged. I prefer DUOS' charger because it's longer same with the NOKIA E72 MICRO USB CABLE.
Thanks a lot!
Whatever charger you are make sure it should nor exceed the specification recommended by the manufacturer. For galaxy note we can use 1000 mah 5V rated output of any brand. I think we can go upto 1200 mah but this is completely at your own risk. Beyond this specifications physical damages may occur depending the exceed of limitations.
I am using HTC's charger of same specifications.
Sent from my GT-N7000 using xda premium
I been using Samsung DUOS charger for couple of months. So far ok. Although, I am curious about those charger with 2Amp output. Supposingly charged faster but so sure whether will cause damaged to the Note.
It depends on the type of your charger.
The amperage only says how much electricity the charger is able to produce. If it's a fairly new charger, it'll give only as much as the device connected to it will take - and your phone won't take more than it can handle.
Any charger with usb output and proper voltage will work, unless it's amperage is below the minimum required by the phone.
The KERNEL controls the charging current.
If you are using the stock kernel, the Note only gets max. 1000mA (AC-Charging) independent of the used charger.
Charging with a 1200mA-Charger (used a Nokia) wouldn't change the charging time due to the limitation.
As long as the charger obeys the USB-specifications, you shouldn't hurt your Note no matter of USB or AC.
Regards
battery charging takes three things:
a) a charging source (your USB or car "charger")
b) a charge controller (inside the device)
c) a battery
* A fixed voltage charging source cannot push current into a device, it has a current capability.
* A battery will only accept the current that it desires to charge to its full state.
* The terminal voltage of a battery for full charge is determined by its chemistry.
* Control of charging profile and current limiting is done by a charge controller...
The microUSB connections are rated at 1A max, the charge controller will limit the charge current to this...hence the comment by Thor, and there is no downside to plugging in a charging source that has a 2A capability...just dont assume you are getting 2A out of it
safilo said:
I been using Samsung DUOS charger for couple of months. So far ok. Although, I am curious about those charger with 2Amp output. Supposingly charged faster but so sure whether will cause damaged to the Note.
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Am Confused..you guys pointing that whatever the amperage is supplied to our device, it consume (charge rate per hour) only what it has been designed?????
If so why am I getting faster charge time when I use my car charger??? My car charger rating is 1250mah..if I employ my car charger my phone gets full charge in less than 2 hrs from single digit battery % left!!! How is this happening??
Upto my knowledge 1 amp of current will take 1hr to charge 1 amp rating battery. Here our device is 2.5amp so it takes 2.5 hrs for full charge by 1amp supplied current. If amperage rating increased duration will be reduced. Normally kernels controls overcharging...but does it controls amperage rating?? I don't think so.
Sent from my GT-N7000 using xda premium
thor2001 said:
Charging with a 1200mA-Charger (used a Nokia) wouldn't change the charging time due to the limitation.
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Then why am I getting faster charge with a car charger??
Sent from my GT-N7000 using xda premium
I think you will find that the car charger is not of such as table voltage as the mains supply. Generally car voltages can vary from about 13 Volts to 15 Volts (with the engine running). I am not sure that the car charger regulates this very well (I have seen the same with other devices). If so, it may well be providing more than 5 Volts.
In this case, that is the only way you could possibly damage the battery. I do not believe the Note itself would be damaged. I also do not think it would be noticeable over a short time, but only over a long time.
that is not how charging works...
a) charge acceptance in a battery is non-linear
b) amps*time is not equal to stored charge Ahr.. that would assume 100% efficiency.. and such is not the case. (that would assume zero internal resistance and so a battery would not get even warm if it was 100% efficient at converting incoming charge current to stored charge).
c) your car charger may or may not have a higher current capability than a desk charger.. my samsung charger charges at 750mA max.. my high output charger charges at 925mA max so one charger charges faster than another...
d) If by some lack or variation in calibration you are constantly able to charge at higher currents than the contacts are rated for, expect issues with the microUSB contacts over time..
There is a good reason why every manufacturer specifies and only warrants their devices to be used with their companion chargers.
You certainly dont need to take my word for any of this, the web is there for you to do your own research.
priyanv said:
Am Confused..you guys pointing that whatever the amperage is supplied to our device, it consume (charge rate per hour) only what it has been designed?????
If so why am I getting faster charge time when I use my car charger??? My car charger rating is 1250mah..if I employ my car charger my phone gets full charge in less than 2 hrs from single digit battery % left!!! How is this happening??
Upto my knowledge 1 amp of current will take 1hr to charge 1 amp rating battery. Here our device is 2.5amp so it takes 2.5 hrs for full charge by 1amp supplied current. If amperage rating increased duration will be reduced. Normally kernels controls overcharging...but does it controls amperage rating?? I don't think so.
Sent from my GT-N7000 using xda premium
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jeromepearce said:
If so, it may well be providing more than 5 Volts.
In this case, that is the only way you could possibly damage the battery.
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Regarding voltage I checked with a multimeter (a good professional one) it shows around 4.937- 4.982 V. And yes I know that this type of charging would affect battery.. But it's less expensive than the device so I didn't care.
Sent from my GT-N7000 using xda premium
Mystic38 said:
that is not how charging works...
a) charge acceptance in a battery is non-linear
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Thanks for re calling my studies at school..now I remember I learnt this year's back..
But still I need further more clarification..
I wonder when I use my device hardly battery doesn't get hot at all.. Only the above portion were the camera rest get hot so is this means efficiency of battery is good and that heat us produced because of processor and other functioning parts? Whereas my older device's battery gets heated when I use heavy. Did I Get right?
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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.)
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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
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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
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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.
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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?
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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.
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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?)
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.
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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.
We all know that charging with the stock charger is very very slow so i was wondering if i can use a charger that outputs A) 5.2V/2.4A B) 5.1V/2.1A C) 5.0V/1.2A these are all charger that i have which one is the best to use without damaging the battery ????
none, as long as the charger your using isnt weaker than the stock charger, it'll make no difference. Having a 2amp charger might produce more current, but the phones going to accept only what its programmed for, which is what the stock charger outputs.
Its safest to use the stock charger with the stock cable, and if your phones fairly new, don't worry, charging speeds up after a week or two.
Sent from my HTC One using xda app-developers app
I just got the device the day before yesterday and it takes around 4 hours to charge full from 5%
amr-213 said:
I just got the device the day before yesterday and it takes around 4 hours to charge full from 5%
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Phone has power supply control chip that limits the maximum charging current (1A in case of HTC One). Unlike fast USB charging maximum charging current is not something that is possible to be changed from any software.
So now that samsung decided to remove the battery, it would only make sense to have a portable battery pack handy.
A friend of mine let me borrow his RAVPower 15,000mAh power pack and i have been testing it on my S4 to see how well it works, so far i am impressed with it, but i've only charged the phone twice, trying to see how many charges i can get out of it. will update this thread and post a better review of it later when i get better impressions of it. i also have an brand new Anker power pack i will be testing later on. primarily interested in charge speed rather than charge cycles. will update this post a bit later with more information and power packs.
link: http://www.amazon.com/gp/product/B00MQSMEEE/
I found this article linked in another thread over at Android Central http://www.phonearena.com/news/Doub...honeSuits-snap-on-Flex-Pocket-Charger_id66907 and this is a nice pocketable charger that doesn't require you to have a cable on hand to charge.
Here is PhoneSuits page http://www.phonesuit.com/phonesuit-...-smartphones?gclid=CJ35qJvdk8QCFRMatAod43cAAg and its listed at $49.95.
that's quite a bit of money for only 2600mAh, guess it's small so that is a plus, but if you want something that can charge several phones with one charge i would go with something like this:
http://www.amazon.com/gp/product/B00NWEB49W/
it even doubles up as an actual wall charger.
smaller than a pack of cigarettes and a bit cheaper than that 2600mAh power pack.
I have this one. It's 10,000 mah, which is pretty good for the price.
http://www.amazon.com/TechMatte®-10...UTF8&qid=1426265278&sr=1-3&keywords=powerbank
It takes about two hours to charge, and then to charge my dead s5 takes about 1 hr and 45 minutes.
I have a Samsung one with 10000mAh and it is pretty good. With a 2000-3000mAh you are not even going to charge the phone up once, so pretty much useless.
I have been using Anker 2nd gen Astro2 for a year now , looks good with plenty of juice , and as per manufacture specs it can push out 3 Amps , 3 Amps is useless on my S4 but it should be perfect for S6.
Looking for a powerbank that supports fast charging for the s6
Sent from my Nexus 10 using XDA Free mobile app
I have few round up here few days back
http://forum.xda-developers.com/galaxy-s6-edge/accessories/power-bank-capable-adaptive-fast-t3048671
Please mention the Phone you have &
How many times does the Power bank charge the phone when its fully drained
Thanks
EnIXmA said:
Looking for a powerbank that supports fast charging for the s6
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forget finding a "fast charge" on portable chargers. highly unlikely you will find one. maybe in the future when someone figures out and implement some kind of voltage step-up regulator as it's a limitation right now since to get fast charge to work you need 9 Volt output and current portable chargers can only output @ 5 volts. it's basically a limitation on the internal li-ion batteries, they can only output 4-5V.
your best bet is to get something like the Anker 16,000mAh for high capacity and pretty fast charging, it can output 5V at 2.1A, it will charge most phones (Galaxy S4, S5) in about 1 and 1/2 hours from about 8% battery left on the phone. you might only shave off only 15-20 minutes using a samsung wall fast charger, so it's really not a whole lot difference..
Anker 16,000mAh 2nd gen:
http://www.amazon.com/gp/product/B00N2T7U90/
it will charge an S4 or S5 roughly 5 times with a single charge.
tft said:
forget finding a "fast charge" on portable chargers. highly unlikely you will find one. maybe in the future when someone figures out and implement some kind of voltage step-up regulator as it's a limitation right now since to get fast charge to work you need 9 Volt output and current portable chargers can only output @ 5 volts. it's basically a limitation on the internal li-ion batteries, they can only output 4-5V.
your best bet is to get something like the Anker 16,000mAh for high capacity and pretty fast charging, it can output 5V at 2.1A, it will charge most phones (Galaxy S4, S5) in about 1 and 1/2 hours from about 8% battery left on the phone. you might only shave off only 15-20 minutes using a samsung wall fast charger, so it's really not a whole lot difference..
Anker 16,000mAh 2nd gen:
http://www.amazon.com/gp/product/B00N2T7U90/
it will charge an S4 or S5 roughly 5 times with a single charge.
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I have already got that power bank..thnx any ways
Sent from my D6503 using XDA Free mobile app
I've a TP-link 10400MAH, it's very good
i got the mi powerbank 10400mAh, its charging my lg g3 quite fast (output rated 2A).
never looked how long exactly it takes, but i will do that when i get my edge.
it's using standard lithium cells from samsung/lg.
i think it's also possible to change them, have to investigate this.