Database Users

Using different charger

Hey guys, can I use a htc charger to charge the s2, I understand the output is different between s2 charger and htc charger, will it pose a problem to the battery?

no problem.
Some info:
A charger does not push a certain current either, the phone uses as much as it wants as long as it is same or less than the current rating on the charger.
And if the charger provides less than the phone wants, then the phone adapts to this as well.

Oki, if let's say the htc charger out is 1.0mah, and the samsung charger is 0.7mah, is it still alright to use the htc charger?

bryant_16 said:
Oki, if let's say the htc charger out is 1.0mah, and the samsung charger is 0.7mah, is it still alright to use the htc charger?
Click to expand...
Click to collapse
Yes you can just look under your battery once removed on your serial label

Erm.. what to look for?
I only see 3.7V and 1650mAh.
That's all.

bryant_16 said:
Oki, if let's say the htc charger out is 1.0mah, and the samsung charger is 0.7mah, is it still alright to use the htc charger?
Click to expand...
Click to collapse
No problem.
I'm charging my phone with the following chargers: 1.2A Nokia charger, 1A Nokia charger, 0.7A Samsung charger, 0.55A noname car charger, and some USB cables providing 0.5A.
And I also understand the electrical theory regarding this so this is ok both in practice and theory

tjtj4444 said:
No problem.
I'm charging my phone with the following chargers: 1.2A Nokia charger, 1A Nokia charger, 0.7A Samsung charger, 0.55A noname car charger, and some USB cables providing 0.5A.
And I also understand the electrical theory regarding this so this is ok both in practice and theory
Click to expand...
Click to collapse
The higher the A rating, the faster the battery will charge, but this also will heat the battery more, reducing it's lifespan. Slower charges are annoying, but preferred for battery longevity.

Can I check what A rating is iphone charger? I'm planning to plug in microUsb to charge my s2 at work and leave the stock charger at home.
So want to check again, if 1A charger is suitable for S2?
Just to add on. When I'm charging my S2 using stock charger and playing grand prix story, the percentage of the battery actually decreased. Is it due to the 0.7A supplied by the stock charger?

bryant_16 said:
Can I check what A rating is iphone charger? I'm planning to plug in microUsb to charge my s2 at work and leave the stock charger at home.
So want to check again, if 1A charger is suitable for S2?
Just to add on. When I'm charging my S2 using stock charger and playing grand prix story, the percentage of the battery actually decreased. Is it due to the 0.7A supplied by the stock charger?
Click to expand...
Click to collapse
The phone only allows 650mA? or so into the battery, so anything above that is usually wasted. If you're playing graphically intensive or CPU intensive games most likely the charge rate can't match the drain rate, so slower charging or draining in your case.

S2 only allows 650mA? So even if I have a 1A charger, it won't be able to charge up fast too?

bryant_16 said:
S2 only allows 650mA? So even if I have a 1A charger, it won't be able to charge up fast too?
Click to expand...
Click to collapse
No it won't charge it faster.
Sent from my SK17i using xda premium

I use my gfs HTC charger, mines fine

You can use any charger but, from what I've heard, if the output is higher than what is recommended for your phone, the battery life will be reduced.

donalgodon said:
The higher the A rating, the faster the battery will charge, but this also will heat the battery more, reducing it's lifespan. Slower charges are annoying, but preferred for battery longevity.
Click to expand...
Click to collapse
This is not quite true.
The voltage of mini USB type chargers should always be 5volts. The current rating (amps) varies depending on the charger. Using a charger to charge a device to with a current rating lower than the current rating of the charger will make no difference. However using a charger to charge a device that requires a higher charging current could result it the device taking a longer time to charge and may not fully charge at all.
So most chargers will be fine to charge your phone. However if the charger current rating (amperes) is too low, you may find that if your using your phone while charging you could find the the battery will charge very slowly or even discharge (more likely when using something like navigation app). Both circumstances will make no difference to the health of the battery.

[SOLUTION] Slow Charging!

★★★This topic is for them who are having problems with stock charger and cable. If you don't have any problems, ignore this ★★★
Well, since I purchased my Note 2, I kept facing this slow charging problem. Now what is slow charging some of you will ask? Well, it's simple. The device is taking more than normal time for charging. Now how do you know the default/should be rate for charging? Simple again. The AC adapter clearly says output rate as 2000 mA or 2.0 A. So with that calculation Note 2's monstrous 3100 mAh should be fully charged with 2 hours. But as we've seen steady 2.0A is not the output case in some/many scenario, so add another 30 mins to it. So whatever it is, from 0-100%, the device shouldn't take more than 2 hours 30 minutes.
And for me, it was taking around 5 hours! Sometimes 4 hours 30 minutes, and if it's very fast then 4 hours. Well I was never gonna wait 4 damn hours before going to my office and irritate myself, and I don't have the habit of charging overnight, unless I absolutely need it.
So I kept calling my retailer, asked for replacement, and they did, well, you won't believe, they replaced three times actually, so I had three different Note 2, with three different charger. Well, each of them acted absolutely fine at first 3-4 charge, then the problem was back again and again. I in fact turned off the device and put it into trash once.
Then I thought let's try some different USB cables, I tried my friend's Galaxy Ace cable. Charging current kept fluctuating between 1000-1200 mA. Which was better than those faulty stock cables, which provided steady 900 mA. Sometimes it even was detecting the AC current as USB, which would provide a mere 460 mA and would take God knows how long! Then I found my piece. I went to my retailer, frustrated and angry, asked them to give me the thickest and shortest possible cable, and they provide me one from a Samsung phone's box, but I can't recall which device was that! And then I sat there for half an hour, kept plugging and unplugging, and the current rate was rock steady at 1800 mA. I took it, paid just 10$ and came back.
Since then I have charged my phone almost 10 times and the current rate never went below 1800 mA / 1.8 A.
This is the cable I am using, do notice that it has 5 pin set up against stock cable's 4 pi, if that matters in any way, and it's about 10% thicker than the stock cable and also about 9" shorter.
And how will you monitor the charging current, three ways are there,
1- Battery Monitor (yet I don't know how to exactly use it)
2- If you are rooted (which is a must anyway), then just go to, /sys/class/power_supply/battery/current_avg
3- Use the app from the link below. It basically reads the current value just exactly as above but it saves the time to go into that file every time. A big thanks to Deadvirus.
Galaxy Charging Current application's apk can be found here:
http://forum.xda-developers.com/showpost.php?p=36124435)?
Play Store link: (Paid)
https://play.google.com/store/apps/...S5hYm1hbnRpcy5nYWxheHljaGFyZ2luZ2N1cnJlbnQiXQ..
Thanks to this post and it's poster for informing us about the current output reading path,
http://forum.xda-developers.com/showpost.php?p=33585646&postcount=31

The included cable charger that mine came with charges fast like that, I let it charge slow with standard USB port overnight, but the included charger nd included cable should achieve this. The cable is important.

kebabs said:
The included cable charger that mine came with charges fast like that, I let it charge slow with standard USB port overnight, but the included charger nd included cable should achieve this. The cable is important.
Click to expand...
Click to collapse
Same here, it's done within about 2 hours every time, from ~1%. Something definitely must have gone wrong with yours :s

R: [SOLUTION] Slow Charging!
You are amazingly right. Every charger/cable combo I test seems to deliver different currents, according to the app you posted, ranging from 600 to 1300 (mA?).
Didn't know that could happen. Now I am looking for the Holy Grail of chargers, too.
After some tests: original chargers of Note 2 and Tab provide 1800 mA; no-brand Chinese labeled 1500 gives 1400; one Nokia labeled 1200 gives 1300, another, labeled 1200, gives 1200. Puro brand, labeled 2100, gives 1100. Another Chinese, no-brand, labeled 2000, double usb, gives 1100 per socket. Other no-brand samples give 600 or 300 mA.
Enormous variability.
Think I'll use the 1800 mA Samsung for when I'm out, and the good Nokia's for overnight charging when home.
Sent from my GT-N7100 using xda premium

And I ve been wondering why the heck original cable is too short. I thought samsung were just tight gits. Cable is mot even long enough to reach feom the wall to bed side table
Sent from my GT-N7100 using xda app-developers app

no problem whatsoever with mine , charging from 1 to 100 % in about 2 - 2:10 hours

Thank you for nice explanation! Now it's much clearer.
For me...
Stock charger + stock short cable (0,9 m) = ~2+ hours
Stock charger + some other cable (1,8 m) = ~4+ hours
,don't know about thicknes. Mb stock cable is thicker, or at least harder to bend.
Sent from my GT-N7100

Thanks for the APK, I found a huge variance in charging rates based on a combination of chargers and cables. Goes to show that the cable makes a huge difference. Here's my findings:
** Stock Charger (2A):
w/Stock Cable (4-pin) - 1698
w/Cable from another phone (5-pin) - 1698
w/Cable from battery pack (5-pin)- 1698
w/generic eBay cable (4-pin)- 100! - It didn't charge at all, even with screen off.
** iPhone Charger (1A):
w/Stock Cable (4-pin) - 1300
w/Cable from another phone (5-pin) - 1100
w/Cable from battery pack (5-pin) - 1300
w/generic eBay cable (4-pin) - 100!
** Car Charger (1A):
w/another generic eBay cable - 490
(Was running Redpill kernel, not sure if that has fast charging built in which might affect results).

The app is really helpful. Been wondering what the charging current was on different chargers.
I measured it using the app based on current AVG and not current NOW. This is because I used a 800ma blackberry charger and yet current now shows 1698 which is impossible.
The app will tell you which cables and chargers are good. I was shocked that out of my 8 cables only 3 gave an average of more than 1000, the rest give around 800 or less.
Sent from my GT-N7100 using Tapatalk 2

Hi!
So, the AC adaptater mentionne 2A but it doesn't mean that your devuce consume 2A... It means that the AC adaptater can provide 2A under 5V.
If a load need to consume 500mA the adaptater can provide enough power. But if it needs more than 2A, the ouput current will be at the 2A max but your voltage will decrease (it means that you have a device problem!).
The only thing to do is to refer to the user manual of device.
One thing more, the USB protocole fix the maximun current to 1A!
An other thing, if you want to have a better battery life it recommended to charge your battery slowly. Just have the habit to charge it during the night.
See ya.
Sent from my GT-N7105 using xda app-developers app

I also got an lg very thick cable..which is also 5 pin and let me tell it charges REEEEAAAALLLLYYYY FAST..when seen in application posted in op(thanx) it shows 1800..but the problem is if I detach charging before battery full notification then the battery is consumed at very high rate..I.e battery life decreased or maybe shows fake battery percentage. .and if I go for full charge it takes half hour more after 100% to show battery full in notification. .
Sent from my GT-N7100 using Tapatalk 2

lucier said:
Hi!
So, the AC adaptater mentionne 2A but it doesn't mean that your devuce consume 2A... It means that the AC adaptater can provide 2A under 5V.
If a load need to consume 500mA the adaptater can provide enough power. But if it needs more than 2A, the ouput current will be at the 2A max but your voltage will decrease (it means that you have a device problem!).
The only thing to do is to refer to the user manual of device.
One thing more, the USB protocole fix the maximun current to 1A!
An other thing, if you want to have a better battery life it recommended to charge your battery slowly. Just have the habit to charge it during the night.
See ya.
Sent from my GT-N7105 using xda app-developers app
Click to expand...
Click to collapse
Yes, the stock charger doesn't provide full 2A current.
And is it true that if the device is charged slowly the battery backup will be better? I mean that would be good then. I'll try that, thanks for informing.
sumeshd said:
I also got an lg very thick cable..which is also 5 pin and let me tell it charges REEEEAAAALLLLYYYY FAST..when seen in application posted in op(thanx) it shows 1800..but the problem is if I detach charging before battery full notification then the battery is consumed at very high rate..I.e battery life decreased or maybe shows fake battery percentage. .and if I go for full charge it takes half hour more after 100% to show battery full in notification. .
Sent from my GT-N7100 using Tapatalk 2
Click to expand...
Click to collapse
On my old cable, the damaged stock one, it'd take half an hour to reach 100% from 99. With this one it takes 5-6 mins.
This whole charging process is complicated that much I can say.
'Swyped' from my GT-N7100

Unfortunately I got a grey import so my stock charger was for a different country.
I'm having to use a 1.0A charger instead.
It still only takes a few hours to charge though. I sleep for 4-5 hours and it's always fully charged when I wake up.
Sent from my GT-N7100 using xda app-developers app

Hmm is this a accurate way of measuring amp?
I was using same cord and the apk provided above, using the default 2amp charger says 1697 and using a bellkin in charger rated at 1amp,says the same thing?
Hmm

I am a bit confused, which of the following is my actual charging rate? The charge is really slow, around 15% per hour or so.
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.

As I stated in the screenshot, you shouldn't look at current_now, it'll always be same, 1698, you should look at current_avg.
'Swyped' from my GT-N7100

Damn. That means it's time for me to get a new charger, isn't it?
Just switched to a very old 0.7 A output charger my father uses on his primitive samsung device. It gives better results than my stock charger/USB cable, provided by samsung. 800 mA on a 700 mA charger. How is that even possible?
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.

SacGuru said:
I am a bit confused, which of the following is my actual charging rate? The charge is really slow, around 15% per hour or so.
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.
Click to expand...
Click to collapse
are using stock cable ?

yahyoh said:
are using stock cable ?
Click to expand...
Click to collapse
Yeah I am. The stock charger says 2A, 5V. When used with the stock cable it charges at a mere 200-400 mA. I used the wall charger of an old samsung phone (doesn't have a usb cable, just a wall charger) and current rises to 800mA. Where can I buy a good USB cable at in the UK?
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.

I have buy a new stock charger because I was thinking my stock one was dead (slow charging / usb mode)...
But in fact it's not my stock charger who is defected but it's just the cable!!!
Just try with another cable and it's OK (AC mode).
Thanks for the apk!

About AC adapter and its amperage

Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English

You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app

Evergreen74 said:
Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English
Click to expand...
Click to collapse
You must use a 5V AC USB Adapter and better no LESS than 1A
for Fast Charge.
AC Adapter I Use:
iPad AC Adapter 5V 2.1A at Work
PlayBook AC Adapter 5V 1.8A at Home 1
Original Nexus 4 AC 5V 1.2A at Home 2.
Our Nexus 4 will Draw around 0.8A when Batt lever at 0% - 80%,
then around 0.5A at 80%-95%, Final State 95%-100% will draw 0.2A roughly.
When 100%, Nexus 4 will use the AC power & the Current "A" show on phone
will like 2mA (0.002A) when idling.
** 1A = 1000mA

As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.

Sfkn2 said:
As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.
Click to expand...
Click to collapse
Why do you say not to go under 1.2A? Charging from a laptop is at .5A. I've been using a 1A charger since day one. Haven't experienced any issues with it.
Charging at a lower amperage shouldn't hurt anything, just charge slower. All you have to do is make sure it's a 5V charger. Amperage shouldn't matter but a lower amp charger will charge slower. As for a higher amp charger, the phone will only draw the amount of power it needs to charge so using 2A charger won't hurt anything either.

Also 2mA is 0.002A not 0.02 A

wilsonlam97 said:
You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Since the charger doesn't actually regulate the charging itself (the phone does this) it doesn't matter how many amps it can supply, could be 100 amps, no worries. As long as it is 5V, the phone will draw as many amps as it needs.
Since the supplied charger is 1.2A rated, it's fair to assume that the phone will never actually try to draw any more than that, so there will be no benefit in going higher.
Going for a lower current charger will likely extend the charge time.

I use a 2.1 amp daily without any issues.
Sent from my Nexus 4 using Tapatalk 2

Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!

Evergreen74 said:
Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!
Click to expand...
Click to collapse
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.

There may be one other thing to consider when selecting a third party charger. In the Nexus 7, the device looks for pins 2 & 3 (data) of the USB plug to be shorted in order for it to draw full current. If this pins are open (or have a load across them as is the case with iPhone/iPad chargers), the Nexus 7 will assume it is plugged into a computer and limit its draw to 500MA.
Not certain the Nexus 4 behaves the same way but would assume so.

setzer715 said:
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.
Click to expand...
Click to collapse
setzer715, thanks for the answer... I think I will be using the Xperia P charger at work...
Thanks all for your help!!

I want to make this case clear. According to my Charging log,
Here is some key point.
Nexus 4 Max Draw Rate at Fast Charge Mode is around 800-900mA,
even you use a Charger that rated at 1A (iPhone Tofu), 1.2A (Original),
1.8A (Playbook), 2.1A (iPad).
Fast Charge Mode must be with Charging Cable with 2&3 pin Shorted,
or the charger itself have the 2&3 pin already shorted.
Therefore, 1A is a Sweet spot for getting Charger & Charging Time for
Li-Po/Li-Ion/Ni-MH Batt charging.
If you use under 1A Charger, eg 700mA or 500mA, it will take much longer
to charge the batt but no harm as well. Just too slow only.

The stock charger that came with my phone sucks, I use one from my epic 4g touch (gs2)and it charges much better
DEVICE: Nexus 4
KERNEL: Franco r95
ROM: PROJECT Extinct Life Event

jlear3 said:
The stock charger that came with my phone sucks,
Click to expand...
Click to collapse
Why you say so...? What's wrong with it...?

Talon88 said:
Why you say so...? What's wrong with it...?
Click to expand...
Click to collapse
Left a phone on a charger all night with a long (10ft) cable and it couldn't even charge the phone over night. I know a 10ft cable will slow things down but my gs2 plug has no problem charging my phone. Search around and you'll find a few fail stories about the stock LG charger.
Sent from my Nexus 4 using Tapatalk 2

Tablet is extremely picky with chargers

I have a Verizon Galaxy Tab 7.7 i815.
It's an amazing tablet for video playback because of the large AMOLED screen. Comparable to plasma screens.
So, the problem I have is that while it's great for this, it is also extremely picky on the charger. Basically, the only thing I can get to recharge this is with the Samsung usb charger that plugs into power.
It will not even charge from the computer.
And of course, it refuses to charge from portable power banks. This is kind of a big deal because the battery life of this tablet is pretty bad, so being able to use a power bank would be great.
Any idea why this is? How to fix? Maybe I just have a bad unit? What's going on?

taiwwa said:
I have a Verizon Galaxy Tab 7.7 i815.
It's an amazing tablet for video playback because of the large AMOLED screen. Comparable to plasma screens.
So, the problem I have is that while it's great for this, it is also extremely picky on the charger. Basically, the only thing I can get to recharge this is with the Samsung usb charger that plugs into power.
It will not even charge from the computer.
And of course, it refuses to charge from portable power banks. This is kind of a big deal because the battery life of this tablet is pretty bad, so being able to use a power bank would be great.
Any idea why this is? How to fix? Maybe I just have a bad unit? What's going on?
Click to expand...
Click to collapse
You need an adapter to charge with computer or battery or anything besides the stock charger. I was trying to find one on ebay without success. I will look again. The one I have is made by Pizen and was $2.

http://www.ebay.com/itm/FOR-Samsung...=Laptop_Adapters_Chargers&hash=item1c36f25bea
You need something like this.
Sent from my GT-P6810 using xda app-developers app

taiwwa said:
I have a Verizon Galaxy Tab 7.7 i815.
It's an amazing tablet for video playback because of the large AMOLED screen. Comparable to plasma screens.
So, the problem I have is that while it's great for this, it is also extremely picky on the charger. Basically, the only thing I can get to recharge this is with the Samsung usb charger that plugs into power.
It will not even charge from the computer.
And of course, it refuses to charge from portable power banks. This is kind of a big deal because the battery life of this tablet is pretty bad, so being able to use a power bank would be great.
Any idea why this is? How to fix? Maybe I just have a bad unit? What's going on?
Click to expand...
Click to collapse
Mine (a P6800) charges normally from USB (only with the screen off and charges VERY slowly, though; despite the battery icon showing an "X") and from my power bank. That power bank is chinese, got it from DealExtreme, and puts out 2A of current (the same as the stock charger). The battery icon also shows an "X" when charging from it, though.
Are you sure it doesn't charge? Or does it display an "X" but still charges when not in use?

Steve_max said:
Mine (a P6800) charges normally from USB (only with the screen off and charges VERY slowly, though; despite the battery icon showing an "X") and from my power bank. That power bank is chinese, got it from DealExtreme, and puts out 2A of current (the same as the stock charger). The battery icon also shows an "X" when charging from it, though.
Are you sure it doesn't charge? Or does it display an "X" but still charges when not in use?
Click to expand...
Click to collapse
Just for info.
The stock kernel will allow only USB charge at a rate of 450mA, regardless of a power bank or PC USB connection. Max AC is 1500mA.
my P6800/P6810 SkyHigh kernel will USB charge up to AC max (1500mA), using same device circuitry. The kernel is also modded to allow charging icon animation when connected to USB power source. This is because it thinks the source is AC. There are no System.UI.apk changes needed
Sent from my GT-I9500 using XDA Premium 4 mobile app

how do you install this?

taiwwa said:
how do you install this?
Click to expand...
Click to collapse
Sorry, the kernel will only work on P6800/P6810 devices (if that's what you're referring to). Was was info about charging rates...
Sent from my GT-I9500 using XDA Premium 4 mobile app

UpInTheAir said:
Just for info.
The stock kernel will allow only USB charge at a rate of 450mA, regardless of a power bank or PC USB connection. Max AC is 1500mA.
my P6800/P6810 SkyHigh kernel will USB charge up to AC max (1500mA), using same device circuitry. The kernel is also modded to allow charging icon animation when connected to USB power source. This is because it thinks the source is AC. There are no System.UI.apk changes needed
Sent from my GT-I9500 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
AC max is 1.5A? Weird... The charger is good for 2A, and we've got more than enough battery to charge at 2A safely. Any way to increase the AC limit on your kernel, maybe configurable by a file/variable/etc?
And I'm pretty sure the device charges at more than 450mA from my power bank. Just checked, and realized that the charging icon appears normally (on stock 4.1 kernel). Galaxy Charging Current reports a 2A current on my S3 (Temasek kernel, adjusted for a maximum of 2000 mA on AC, 1200 mA on USB3 and 650 mA on USB2). Some power banks appear exactly like an AC charger as far as the USB connection is concerned.

Steve_max said:
AC max is 1.5A? Weird... The charger is good for 2A, and we've got more than enough battery to charge at 2A safely. Any way to increase the AC limit on your kernel, maybe configurable by a file/variable/etc?
And I'm pretty sure the device charges at more than 450mA from my power bank. Just checked, and realized that the charging icon appears normally (on stock 4.1 kernel). Galaxy Charging Current reports a 2A current on my S3 (Temasek kernel, adjusted for a maximum of 2000 mA on AC, 1200 mA on USB3 and 650 mA on USB2). Some power banks appear exactly like an AC charger as far as the USB connection is concerned.
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Why weird? Is all in the P6800 kernel source code.... I've not mentioned SGS3 ....
Those apps may just detect the source input, not the actual charge rate limited by kernel. Big difference afraid.
If the P6800 stock kernel detects it being charged as USB, all you will actually get is max 450mA. Same goes for AC, may show the source input greater, but charging rate is limited to max 1500mA. You can see my kernel commits on gitHub and study for yourself.
Remember, those charging current apps while useful, do have a large degree of variance as well.
Sent from my GT-I9500 using XDA Premium 4 mobile app

UpInTheAir said:
Why weird? Is all in the P6800 kernel source code.... I've not mentioned SGS3 ....
Those apps may just detect the source input, not the actual charge rate limited by kernel. Big difference afraid.
If the P6800 stock kernel detects it being charged as USB, all you will actually get is max 450mA. Same goes for AC, may show the source input greater, but charging rate is limited to max 1500mA. You can see my kernel commits on gitHub and study for yourself.
Remember, those charging current apps while useful, do have a large degree of variance as well.
Sent from my GT-I9500 using XDA Premium 4 mobile app
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Click to collapse
Weird because the charger that comes with the P6800 is rated 2A, and the P6800 battery is big enough to charge at 2A and stay under 0.7C. There is no reason at all to limit the charge to only 1.5A, unless the circuitry won't handle that (which would be a bad screwup by Samsung). I just asked if it is possible to change this "hard" limit on your kernel. I didn't mention the I9300 on this point, only as an example of a device where this is adjustable on custom kernels (it's also adjustable on your I9500, by the way, check Perseus kernel).
Actually, that app detect the actual charge rate as limited by the kernel (on the I9300). That app doesn't work on the P6800, because the kernel doesn't output those values. On the I9300, some kernels allow you to configure the maximum input current (@5V, from the charger) and the maximum current output (@~4.35V, to charge the battery). But that is not important; my point was just that some power banks (like mine) have the exact same USB connection as a regular wall charger, so the phone/tablet/whatever sees it as a regular wall charger even on stock kernel. The OP could search for one of those, if his device charges normally from wall chargers it will charge from a power bank like this.
And BTW, Apple chargers are crap, they won't output full current unless they detect an Apple device. So, no Android/WP/etc will charge correctly from an Apple charger.

Steve_max said:
Weird because the charger that comes with the P6800 is rated 2A, and the P6800 battery is big enough to charge at 2A and stay under 0.7C. There is no reason at all to limit the charge to only 1.5A, unless the circuitry won't handle that (which would be a bad screwup by Samsung). I just asked if it is possible to change this "hard" limit on your kernel. I didn't mention the I9300 on this point, only as an example of a device where this is adjustable on custom kernels (it's also adjustable on your I9500, by the way, check Perseus kernel).
Actually, that app detect the actual charge rate as limited by the kernel (on the I9300). That app doesn't work on the P6800, because the kernel doesn't output those values. On the I9300, some kernels allow you to configure the maximum input current (@5V, from the charger) and the maximum current output (@~4.35V, to charge the battery). But that is not important; my point was just that some power banks (like mine) have the exact same USB connection as a regular wall charger, so the phone/tablet/whatever sees it as a regular wall charger even on stock kernel. The OP could search for one of those, if his device charges normally from wall chargers it will charge from a power bank like this.
And BTW, Apple chargers are crap, they won't output full current unless they detect an Apple device. So, no Android/WP/etc will charge correctly from an Apple charger.
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Click to collapse
Comparing kernels from different boards and CPU etc is like comparing apples and oranges.
If I could make the charge current configurable in my kernel, don't you think I would have already? Not everything is "cut and paste" and I expended allot of time in trying to port the mod for our current hardware.
Yeah, I've used just about all the kernels (at time of owing device) including perseus, siyah etc, do have good experienceI with configurable kernel charge. After using/having SGS2 x2, SGS3 x1, SGS4 x1 and SGT P6810 x1, it's not the first time I've heard of it.....
I won't be increasing max charge rate on the SkyHigh kernel above 1500mA. This generally increases battery heat and shortens lifespan.
On stock kernel + unmodified systemUI.apk for battery charge icons, if the kernel detects ANY charge source as USB, the max rate will be 450 mA. You will not see any battery charging animation (just the red x), which is a "sure fire way" to check.
In short, on our SGT-7.7, under stock conditions, if you connect ANY charging source and you DON'T have the battery charge animation, it will be USB charge at 450mA max.
Sent from my GT-I9500 using XDA Premium 4 mobile app

UpInTheAir said:
Comparing kernels from different boards and CPU etc is like comparing apples and oranges.
If I could make the charge current configurable in my kernel, don't you think I would have already? Not everything is "cut and paste" and I expended allot of time in trying to port the mod for our current hardware.
Yeah, I've used just about all the kernels (at time of owing device) including perseus, siyah etc, do have good experienceI with configurable kernel charge. After using/having SGS2 x2, SGS3 x1, SGS4 x1 and SGT P6810 x1, it's not the first time I've heard of it.....
I won't be increasing max charge rate on the SkyHigh kernel above 1500mA. This generally increases battery heat and shortens lifespan.
On stock kernel + unmodified systemUI.apk for battery charge icons, if the kernel detects ANY charge source as USB, the max rate will be 450 mA. You will not see any battery charging animation (just the red x), which is a "sure fire way" to check.
In short, on our SGT-7.7, under stock conditions, if you connect ANY charging source and you DON'T have the battery charge animation, it will be USB charge at 450mA max.
Sent from my GT-I9500 using XDA Premium 4 mobile app
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I didn't say it would be an easy/simple port, I just asked if it was possible. I didn't look at your github (and I have almost no experience with the P6800 kernel)... You know your sources better than anyone else, so I assumed you would understand better than I do what (and where) would need to be changed. I'm not diminishing your work or your effort in any way, shape or form; I respect the developers who stuck with this amazing device for so long, and who continue to make it usable way past what Samsung intended.
Our battery has a total capacity of 5100 mAh. From http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries:
The charge rate of a typical consumer Li-ion battery is between 0.5 and 1C
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That gives us a "safe" maximum charging rate of between 2550 mA and 5100 mA. 0.7C is generally agreed as a good rate for this first stage charge for Li-Po batteries, which means 3570 mA; the regulators on the tablet will reduce the rate when needed. Generally, charging Li-ion/Li-po batteries at such a low rate (~0.3C) is detrimental to the battery max charge, and a major screwup by Samsung (and explains why my P6800's battery doesn't last as long now as it did on its first month); that is why I asked. But that was just a question. If you won't do it, I respect your position.
About charging from the power bank, I don't get your point. As I said, when I plug my P6800 on my power bank, I don't get the red X; I see the regular charging animation, and the device charges as fast as it does on the stock wall charger (which is just an adapter that presents an USB connection where you plug the tablet's cable). I understand that when the tablet recognizes it's on a standard USB port, it will use the lower charge rate. But "power-only" USB ports, such as the one on the Samsung wall charger and the one on some power banks, will be recognized as power-only connections (or as the same as the Samsung wall charger), and will charge the device as fast as the kernel allows.
My power bank (this model to be precise) is detected as an AC charger on both my I9300 and my P6800, and would be a good option for the OP.

Don't get my point? Please 're-read the last paragraph in my previous post carefully.... I wasn't disputing your claim, but explaining about the battery charge icon.
Obviously your power bank has some "trickery" to fool the device as AC charge. Probably a resistor combo across the lines inside the source. This being the case, makes a good option for OP (or anyone else) on stock.

UpInTheAir said:
Don't get my point? Please 're-read the last paragraph in my previous post carefully.... I wasn't disputing your claim, but explaining about the battery charge icon.
Obviously your power bank has some "trickery" to fool the device as AC charge. Probably a resistor combo across the lines inside the source. This being the case, makes a good option for OP (or anyone else) on stock.
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yeah, one of my power banks would trick my tab on one of its ports. some resistor thing.

Its due to having resistors put across the data lines.
This is done to trigger the tablet into AC charging mode.
the wall charger has this done to it.
some batterys have a samsung charger cable or a micro usb adapter.
This adapter has resisters inside it.
i have one of these and charges on ac charging.
if i get another cable such as data or car charger etc..
it wont trigger charge even on 2 amps.
good news is a adapter can be made to go from usb to usb...look it up it has 2 resisters in it and also shorts the data lines to each other.

MRBR7 said:
Its due to having resistors put across the data lines.
This is done to trigger the tablet into AC charging mode.
the wall charger has this done to it.
some batterys have a samsung charger cable or a micro usb adapter.
This adapter has resisters inside it.
i have one of these and charges on ac charging.
if i get another cable such as data or car charger etc..
it wont trigger charge even on 2 amps.
good news is a adapter can be made to go from usb to usb...look it up it has 2 resisters in it and also shorts the data lines to each other.
Click to expand...
Click to collapse
Just as I presumed. Thanks
Sent from my GT-I9500 using XDA Premium 4 mobile app

I have a charger that has two usb ports in it. One says ipad and the other galaxy tab.
If I use the ipad one and use it on the 7.7 it thinks an usb device is connected, shows the charging icon and also the red x, but doesn't charge. I think it just has to do with the voltage it receives on certain pins, but what is the meaning of the cross?

Menster said:
I have a charger that has two usb ports in it. One says ipad and the other galaxy tab.
If I use the ipad one and use it on the 7.7 it thinks an usb device is connected, shows the charging icon and also the red x, but doesn't charge. I think it just has to do with the voltage it receives on certain pins, but what is the meaning of the cross?
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Click to collapse
As it will accept a max of 450mA on detected "USB charge", it still should charge, but very slowly.
If you leave the screen off for a while, you should see the battery % indicator increase. If you use the tab while on detected USB charge, the device may consume more current than 450mA, hence the battery % indicator may not increase but instead decrease.
Sent from my GT-I9500 using XDA Premium 4 mobile app

[Q] What charger specification is best for Lg G2?

hello;
i have just bought LG G2 (F320L), i have noticed that if i charge the phone with a charger having 1amp output specification it charges rapidly.
So the question is that what charger output specifuication is best for Lg G2 which may charge the phone rapidly but does not damage the battery.

U can use a 16a charger if u want. The charging circuits in the phone handles the input so max the phone will use is 1.6a. It's li-po cells the phone has som advance circuits handling the balance charging of the cells. Recommended is 2a charger but don't forget the cable.
If u use a chappy cheap cable it won't go above 0,3a use a premium and u whill have a 1.6a charge. 1a is to little and to slow.
The phone handles the power to optimize the charging so don't be afraid to use a powerful charger just make sure it's 5v and above 1.6a. If u bye a 1.6 the charger itself will be on max load and generate a lot of heat with could damage the charger and the phone so go with 2a and a premium cable

I'm pretty sure the post above's first reference was meant to say 1.6A and not 16a (the second reference was corrected). 16A wouldn't necessarily hurt the phone actually since current aka amperage is pulled and not pushed - the device would still only take what it needs as long as the 5VDC is solid.
Anyway, enough rudimentary electronics and electrical theory...
Any modern USB wall charger will work with the G2 without issues, obviously if you can get and use one that provides a higher level of amperage/current it will charge the G2 faster up to about 1.6A as mentioned above. The factory charger included with G2 smartphones is designed to provide 1.8A but the G2 won't necessarily pull that much - the .2A is a little headroom and the charger doesn't "stress" as much to provide the 1.6A.
Lower amperage/current chargers just mean it takes longer to charge the G2, basically. As it has a 3,000 mAh (that's 3A for the record) that basically means with a 1.6A charger attached and the device powered off and charging exclusively you'll get a full charge in just under 2 hours from a near-empty state - if there's a charge on it already then it'll charge at roughly 1% every 2-3 minutes, maybe a touch more if the G2 is powered on and charging.
Either way, again, any modern charger will be fine. Try to get at least a 1A model from whoever, and avoid really cheap ones that can't do 1A minimum. If it's a brand name charger (Apple, Samsung, LG, Motorola, BlackBerry, etc) you'll be fine.

maydayind said:
U can use a 16a charger if u want. The charging circuits in the phone handles the input so max the phone will use is 1.6a. It's li-po cells the phone has som advance circuits handling the balance charging of the cells. Recommended is 2a charger but don't forget the cable.
If u use a chappy cheap cable it won't go above 0,3a use a premium and u whill have a 1.6a charge. 1a is to little and to slow.
The phone handles the power to optimize the charging so don't be afraid to use a powerful charger just make sure it's 5v and above 1.6a. If u bye a 1.6 the charger itself will be on max load and generate a lot of heat with could damage the charger and the phone so go with 2a and a premium cable
Click to expand...
Click to collapse
thank u for quick reply...
br0adband said:
I'm pretty sure the post above's first reference was meant to say 1.6A and not 16a (the second reference was corrected). 16A wouldn't necessarily hurt the phone actually since current aka amperage is pulled and not pushed - the device would still only take what it needs as long as the 5VDC is solid.
Anyway, enough rudimentary electronics and electrical theory...
Any modern USB wall charger will work with the G2 without issues, obviously if you can get and use one that provides a higher level of amperage/current it will charge the G2 faster up to about 1.6A as mentioned above. The factory charger included with G2 smartphones is designed to provide 1.8A but the G2 won't necessarily pull that much - the .2A is a little headroom and the charger doesn't "stress" as much to provide the 1.6A.
Lower amperage/current chargers just mean it takes longer to charge the G2, basically. As it has a 3,000 mAh (that's 3A for the record) that basically means with a 1.6A charger attached and the device powered off and charging exclusively you'll get a full charge in just under 2 hours from a near-empty state - if there's a charge on it already then it'll charge at roughly 1% every 2-3 minutes, maybe a touch more if the G2 is powered on and charging.
Either way, again, any modern charger will be fine. Try to get at least a 1A model from whoever, and avoid really cheap ones that can't do 1A minimum. If it's a brand name charger (Apple, Samsung, LG, Motorola, BlackBerry, etc) you'll be fine.
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thank u for making it clear,
is there any way to measure output of any charger?
i know its not related here but just for fun.:laugh:
currently i am charging my G2 with 1A charger but it takes so long to reach 100% charge, may be about more than 4 hours.

Actually I meant 16a.... Just get a 2a charger and not a cheap one.. Expect to pay 20$

maydayind said:
Actually I meant 16a.... Just get a 2a charger and not a cheap one.. Expect to pay 20$
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hmm.. u are right.
one should go for original branded charger not chinese one..:laugh:

askfriends said:
hmm.. u are right.
one should go for original branded charger not chinese one..:laugh:
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Once I ordered a 2a charger from China.. Output was 200mah and it almost melted. 2$
U can measure how mouth the charger provide.
Easy way is to use a app in you phone. But not 100% accurate.
Hard and accurate way is to use a USB extender cable that u cut the + cable and use a ampere meter. But u have to use a high end cable for that and u don't want to cut a perfect god cable in half
So I recommend this app https://play.google.com/store/apps/details?id=com.manor.currentwidget

maydayind said:
Once I ordered a 2a charger from China.. Output was 200mah and it almost melted. 2$
U can measure how mouth the charger provide.
Easy way is to use a app in you phone. But not 100% accurate.
Hard and accurate way is to use a USB extender cable that u cut the + cable and use a ampere meter. But u have to use a high end cable for that and u don't want to cut a perfect god cable in half
So I recommend this app https://play.google.com/store/apps/details?id=com.manor.currentwidget
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Click to collapse
thank u so much for this tip, i am going to test it now..