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[Q] Voltage on unofficial micro USB charger

My GF ran over my mains charger cable with the vacum cleanerr at the weekend, so i ordered i new one from Ebay. Rather stupidly (as an "official" one would only be £1 more), i bought this unbranded one:
UK MAINS CHARGER FOR SAMSUNG i5700 i9000 GALAXY S on eBay (end time 02-Apr-11 14:51:41 BST)
When it arrived i noticed that the output is different: 5.5v 500ma as opposed to 5v 700ma from the one that came with the phone.
I know tha ampage will affect charging speed, but am concerned about the extra 0.5 voltage. Is this safe to use?

I'm curious about this too... I thought the "U" in USB meant Universal.
I just ordered 2 micro USB chargers from Ebay for my GF's Sony Vivaz Pro and my Captivate... neither work.
Her's doesn't recognize the charger at all... mine beeps and says "charging", but the battery level never goes up.
My chargers are 5v 500mA.
The chargers were listed as Blackberry chargers, but had a long list of compatible phones underneath (none matched our phones, to be fair.)
Now I'm afraid to buy any more generic chargers....

I don't know if the output voltage is part of the USB standard or not. I know that computers output 5v and it seems like a lot of phone chargers also do. However, i've seen some external battery chargers listed as compatible with the SGS listed as 5.2v, so maybe theres an accepted voltage range? Does anyone know for sure if a 5.5v is acceptable?
I'm not sure why the ones you have don't work as the specs seem right,possibly they are faulty?

paddyb said:
I don't know if the output voltage is part of the USB standard or not. I know that computers output 5v and it seems like a lot of phone chargers also do. However, i've seen some external battery chargers listed as compatible with the SGS listed as 5.2v, so maybe theres an accepted voltage range? Does anyone know for sure if a 5.5v is acceptable?
I'm not sure why the ones you have don't work as the specs seem right,possibly they are faulty?
Click to expand...
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Yeah, I'm not sure. I certainly thought so, even though it seemed pretty "unlucky" they both might be faulty.
I did ask the seller, and they claim they are NOT compatible with my phones, but I just don't get it. They're offering me a refund, but at $4 each it's hardly worth my time mailing them.
I found some forums online of a small handful of people like me with chargers that won't work. It seems people with this issue were using 500mA chargers, and anyone using a 700 or 1000 had no problems. This wasn't necessarily because all phones either require 500 or 1000.... Someone also said it's only very certain phones that are built this way. That they require newer, or more powerful chargers... but that it's not the case with all new phones/smartphones.
But there were others who said 500 should charge it, just more slowly.
I still think Micro usb is Micro usb, period. That's why the EU (and here) have been looking at making these chargers universal. I think I'll just try my luck again with another charger.

You could try this one, which claims to be (and looks like), an official SGS charger:
http://cgi.ebay.co.uk/Samsung-i9000...ories_MobilePhoneChargers&hash=item2c5b2d355a

5.5V is supported. I've tested a very wide range of chargers for my SGS and all worked.
The voltage range of these chargers is 4.8V - 5.6V and all worked just fine.

I've actually got an original Nokia USB charger which is declared at 5.0v/550mA and it works like a charm...
Model is AC-6E:
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Well finally decided to give the ebay charger a go. Plugged it in, a green light lit up and plugged the phone in. The phone didn't recognise the charger, no indication the the notification bar that the battery was charging. Unplugged it and and tried again, and now the light on the charger doesn't even come on! Won't be using it again.

Another question on the topic : Is it save to use charger with higher Amperage ?
I mean original samsung one is 0.7A, could something go wrong if I´ll use 1.0A charger? Thanks
EDIT : Answer no needed anymore - found it in another topic. It should be safe

I believe any microUSB charger will be safe. Ideally, you want the highest voltage and highest current possible.
I've heard that the phone will use the data lines to tell the USB charger what voltage to set. This ensures voltage compatibility. Then the phone itself regulates the current.. it will only draw as many amps as it needs. So if the PSU can handle 2A, your device may only draw 0.725a for example, but it's safe. You want a high current one to ensure the phone has all it can take.
BTW, I'm not an EE person, so double check what I said.

I fear it's not that simple, especially with dumb chargers that can't negotiate current using the USB protocol, and instead may short the data lines, in various ways, instead to tell the device what current to draw...
Sent from my GT-I9000 using xda premium

There's an explanation here of why different chargers do indeed make a difference:
http://en.wikipedia.org/wiki/Usb#Power
see in particular the note on the Battery Charger Spec.
In particular. my own testing shows I can go from 500ma to 700mA charging current simply by changing a small connector in line between the 7Ahr battery I'm using to charge the phone, and the phone. That's due to the nature of the short on the data pins.
There are proprietary tweaks to this mechanism; e.g. iPhones use voltage signalling between the two data lines and ground to indicate various things to the device.
All of this is only for "hosts", i.e. chargers etc, that don't implement the USB protocol and so can't engage in the normal current negotation that occurs when connecting e.g. the device to a PC.

Would i **** it up pluging a 5.8 volts solar charger on my phone?

projeto56 said:
Would i **** it up pluging a 5.8 volts solar charger on my phone?
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Click to collapse
It's a bit too high.
You have to know that slow charge = long battery life and fast charge = more battery drain after a couple of years maybe months

HdX75 said:
It's a bit too high.
You have to know that slow charge = long battery life and fast charge = more battery drain after a couple of years maybe months
Click to expand...
Click to collapse
So usb charging is better then wall charging with original charger? because i noticed that my phone hold it`s charge better if i use the wall charger.

Pezmet said:
So usb charging is better then wall charging with original charger? because i noticed that my phone hold it`s charge better if i use the wall charger.
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Click to collapse
Maybe because the current is higher. My battery voltage is arround 4200mV at 100% and 4100mV with USB
For the solar charger 5.8 is really high but the wall charger is ok

guys can anyone tell me what would be the reason that my Samsung j7 prime charger is giving me 4.63v instead of 5v .. the rating is 5v on the charger. is that possible the ic or some other thing is damaged? in that case what would be solution?

USB vs. AC Charging and battery life

A few days ago while driving home from work, the TB tells me that even though it is connected to a USB power source, it doesn't have enough juice to keep on going and that I should switch to AC power. I was rarely (if ever) using the AC adapter. I always plugged the phone into a USB port on my home/work computer or into the dual USB adapter I have in my car. I started charging with the AC adapter at night and noticed a significant improvement in battery life.
I can't really say that the power source was the key factor, since I was experimenting with kernels, ROMS, and SetCPU profiles/smartass governor on a pretty consistent basis. In any case, I'm pretty sure it made a big difference... something did, anyway... I can easily get through the day now.
Then I stumbled on a dual-USB-A to mini-USB cable from a 2.5" Antec HD enclosure and figured I'd give it a shot (with a mini->micro adapter). It was necessary for the enclosure when you tried to use a 7200 RPM drive because a single USB port didn't deliver enough power alone. I decided to plug in my old Droid and see if it worked. When it did, I crossed my fingers and plugged in the Thunderbolt. Seems to be running fine. I've been taking the cable with me between my car, home, and work computers and have noticed faster charge times, less of an immediate drop-off when disconnecting.
I found what appear to be the same cables online if anyone is interested in testing. They are made by StarTech and compusa.com apparently has the cheapest prices (~$4/ea). The part numbers are USB2HAUBY1 / USB2HAUBY3 / USB2HAUBY6 for the 1ft/3ft/6ft respectively. I'm wondering if anyone else could try my experiment w/a more stable platform (i.e., not changing ROMS/kernels/etc.). I figure now that the initial "I can't stop playing with this phone" phase has worn off, we should be able to measure the difference with more typical usage patterns.
FWIW, I have no intention of ever using a single USB-A to micro-USB cable to charge this thing again (except w/the AC adapter). Anyone charging via USB should definitely consider it.

LOL I just started a thread about this here: http://forum.xda-developers.com/showthread.php?t=1022400 not 6 hours ago! Nice to know the cables would work. I figured if I ran two in paralell it might do the trick.

Weird, I've yet to have a cable that told me it was not strong enough.. Multiple cables used in my car (has a usb port), home and work computers. Guess I've gotten lucky.

thats interesting, i kno for sure that using a/c is by far the best solution as it lasts longer, stronger charge, and charges MUCH quicker, i usually only use regular usb as a last resort, but i think u made a pretty damn good discovery! im definitely looking into this

The chargers that came with the phone are 1Amp supplies... Standard USB is only .5Amp, so far 1Amp is the largest draw on a USB 2.0 standard... While when USB 3 hits, that will have higher current capacity than 2.0, so it looks as HTC has designed the phone for USB 3.0
Sent from my ADR6400L using Tapatalk

I don't remember what the exact error message was, but I was at about 7% when I got to my car... I tried to use the phone for navigation and after a few minutes it told me that I needed to switch to AC power.
My thinking is that when the phone is running, active, and the screen is on, it is drawing too much power from the USB power source to allow the battery to fully recharge. This is probably why my experience with the battery has been abysmal. I was using a single USB cable plugged into my computer or a cigarette/USB car adapter 90% of the time.
But if the AC power supply pushes 1A and each USB port can push up to 500mA, the Y adapter should come pretty close to matching the performance of the AC adapter. I'd guess that AC would be the best option, but I'd prefer to have the USB connection w/the computer.
Sorry nerozehl / mods for not adding onto another thread, but I wanted to get the poll going to see how people are typically charging.

scottt732 said:
I don't remember what the exact error message was, but I was at about 7% when I got to my car... I tried to use the phone for navigation and after a few minutes it told me that I needed to switch to AC power.
My thinking is that when the phone is running, active, and the screen is on, it is drawing too much power from the USB power source to allow the battery to fully recharge. This is probably why my experience with the battery has been abysmal. I was using a single USB cable plugged into my computer or a cigarette/USB car adapter 90% of the time.
But if the AC power supply pushes 1A and each USB port can push up to 500mA, the Y adapter should come pretty close to matching the performance of the AC adapter. I'd guess that AC would be the best option, but I'd prefer to have the USB connection w/the computer.
Sorry nerozehl / mods for not adding onto another thread, but I wanted to get the poll going to see how people are typically charging.
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Sounds like you have Power Save set to ON for the error message...

Due to my crappy battery life I use this method.
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ddgarcia05 said:
Due to my crappy battery life I use this method.
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Is that the new cold fusion charger I heard about?
Sent from my ADR6400L using Tapatalk

EDD Skitz said:
Is that the new cold fusion charger I heard about?
Sent from my ADR6400L using Tapatalk
Click to expand...
Click to collapse
Two words. Flux Capacitor

You think that guy has any problems with his battery going dead???
LOL

Dnakaman said:
You think that guy has any problems with his battery going dead???
LOL
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what battery? it was destroyed just looking at that thing...

kierandill said:
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Get it to 88 mph and you can go back in time!

kierandill said:
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Click to collapse
What the heck is a jiggawatt!!!
Sent from my ADR6400L using Tapatalk

very often when using your car charger and navigation, the phone uses more battery than the car charger can replace, so the battery will drop even while plugged in charging. a imagine USB would be similar, since usb is 0.5 amps, while A/C is 1amp. i went to radio shack and got a 1.3 amp charger for my phone, and when plugged in in my car it pulls around 800mA during charging. so its just about close to good enough.

RogerPodacter said:
very often when using your car charger and navigation, the phone uses more battery than the car charger can replace, so the battery will drop even while plugged in charging. a imagine USB would be similar, since usb is 0.5 amps, while A/C is 1amp. i went to radio shack and got a 1.3 amp charger for my phone, and when plugged in in my car it pulls around 800mA during charging. so its just about close to good enough.
Click to expand...
Click to collapse
Now you risk the overcharging/overheating...Keep an eye on that temp

scottt732 said:
I don't remember what the exact error message was, but I was at about 7% when I got to my car... I tried to use the phone for navigation and after a few minutes it told me that I needed to switch to AC power.
My thinking is that when the phone is running, active, and the screen is on, it is drawing too much power from the USB power source to allow the battery to fully recharge. This is probably why my experience with the battery has been abysmal. I was using a single USB cable plugged into my computer or a cigarette/USB car adapter 90% of the time.
But if the AC power supply pushes 1A and each USB port can push up to 500mA, the Y adapter should come pretty close to matching the performance of the AC adapter. I'd guess that AC would be the best option, but I'd prefer to have the USB connection w/the computer.
Sorry nerozehl / mods for not adding onto another thread, but I wanted to get the poll going to see how people are typically charging.
Click to expand...
Click to collapse
Turn off 4G and drop the screen brightness to 50% orless and the draw should be low enough for USB charging. If you are using a car adapter, get one of the high current ones that output 1A. You can get a nice widget like 'Battery monitor Widget' which will show you if your charger is keeping up or not. If the widget displays a value that is green, the charger output is exceeding the draw from the phone by the value shown in the widget.

magneticzero said:
Now you risk the overcharging/overheating...Keep an eye on that temp
Click to expand...
Click to collapse
No need to worry, battery only draws what power it needs, anything higher just doesn't get pulled. Been using it a year now

EDD Skitz said:
What the heck is a jiggawatt!!!
Sent from my ADR6400L using Tapatalk
Click to expand...
Click to collapse
it is the energy produced every time jay-z opens his mouth

Do different chargers matter?

There are a couple of threads here about different chargers. Some people claim different charging rates, some claim different resulting battery life, and some claims are outright outrageous from an engineering perspective.
So I did a test.
Short Answer: No unless using the computer
Charging from the wall is faster than charging from a computer. But the big NO comes in the form of people claiming improvements from chargers other than the official Samsung one.
Long answer:
So I proceeded to build a test rig and check various chargers in various conditions. The conditions tested were: Phone flat (10% charge), Phone nearly full (80% charge) and Phone Full. In all cases tests were done with the screen showing white, and all wireless on, and the screen showing black and in airplane mode to see what impact it had on different chargers.
The chargers which were tested:
700mA Samsung charger that came with the phone
Computer USB power
500mA generic wall USB charger with Chinese written all over it
800mA Car USB charger
1A iPhone wall USB charger
1A HTC wall USB charger (not sure which phone it comes with)
added a 30A bench supply just to be sure, only 80% test done.
Before I continue I should say that the screen off and screen on as well as airplane mode would have an impact on battery charging rate providing the charging current is constant. I.e. You draw 500mA from the wall when the screen is off and the screen is on, there's a difference which is only likely to be going into the battery.
The method was to build a little pass through device that gave me access to all the USB lines. I broke the 5V line and passed it through 2 multi-meters one measuring current through the line and the other measuring voltage.
Results:
Phone at 10%
0.7A Samsung -> 475mA
Computer -> 83-87mA (no voltage sag)
0.5A Generic -> 345-380mA (Note voltage sagging at 3.8V indicates that the device is underpowered)
0.8A Car -> 478mA
1A iPhone -> 470mA
1A HTC -> 476mA​
Phone at 80%
0.7A Samsung -> 472mA
Computer -> 84-90mA
0.5A Generic (test not repeated due to power concerns)
0.8A Car -> 471mA
1A iPhone -> 475mA
1A HTC -> 471mA
30A Bench -> 470mA​
Phone at fully charged
0.7A Samsung -> 12mA
Computer -> 11-14mA (noisy voltage line)
0.5A -> 12mA
0.8A Car -> 12mA
1A iPhone -> 12mA
1A HTC -> 12mA​
Variances with screen and cell networks:
No changes were observed on any charger between switching the screen off and displaying white as well as switching airplane mode off and on. Until that is the battery was fully charged.
The phone idles at 12mA on airplane mode with the screen off.
With the wireless and cell on the phone jumps between 10mA and 40mA every 2-10 seconds for about 3 seconds. It looks like it is polling the wireless.
With the screen on displaying white full brightness the phone jumps between 130mA and 170mA.
This is interesting as it would suggest that if the cell and wireless are on and the screen is set to maximum brightness you'll likely be draining your battery even through it's on charge if you're plugged into the computer.​
Discussion of results:
If your charger is underpowered expect problems. I wouldn't use a cheap Chinese USB -> wall adapter with the phone. But if your charger is capable of supplying at least 700mA then there is absolutely no difference going beyond that.
The computer only drawing less than 100mA is consistent with the windows driver interface saying that the phone has only requested 100mA from the USB slot. This is a driver issue as the USB2.0 spec should be able to provide 500mA from a USB port providing it is the only device on the hub drawing power.
The claim that you get more battery life out of a different charger is absurd. There were theories floating around about "topping up" batteries requiring a lot of power. Actually it's exactly the opposite. As batteries top up the power demands decrease a LOT. Above about 95% there was a noticeable slow decline in current draw. Eventually even before the battery full notice came on the phone was drawing less than 160mA from the wall, and about 10 seconds after saying battery is full it dropped down to the levels mentioned above.
There are a lot of things that can cause variances in battery life, but using a different charger is not one because you are not using a different charger just providing power from a different source. The charger is a small chip on the board of the SGS made by Maxim. If you provide the phone with 5V and >500mA it will happily draw the 500mA. The only exception being the computer power supply.

Thanks for the time you took for testing this, will soak all this text & do my testing based on your method to see if it does make any noticeable difference or not.

thanks for the info. its very usefull.. I appreciated it..

garbz said:
The computer only drawing less than 100mA is consistent with the windows driver interface saying that the phone has only requested 100mA from the USB slot. This is a driver issue as the USB2.0 spec should be able to provide 500mA from a USB port providing it is the only device on the hub drawing power.
Click to expand...
Click to collapse
So are you saying that a driver upgrade would allow my phone to charge just as quickly from the computer as from the Samsung charger that came with the phone? Presumably, using Linux would also solve this?
I'm actually interested in the heat generated by charging. I recently installed some navigation software and used it for the first time on Thursday. Obviously the screen was on constantly as was GPS. Because I only had around 25% charge when I began my journey, I was charging it continually from the moment I left the house. The sun was shining on the windscreen and very quickly the combination of the sun, continual charging and the draw on the battery from the display etc caused the battery temperature to climb to around 63 degrees C. A status message popped up and told me that charging had ceased because the temperature had become too high.
It's a very clever feature that the software recognises that the temperature has become too high and ceases charging but I'm looking to stop this from happening. I tried turning off wifi etc but this didn't make much difference.
Unfortunately, the cigarette lighter -> USB charger I have doesn't tell me how many mA it's providing. I just wondered whether using a car charger with a lower (or perhaps even higher) mA rating might cause less overheat? Otherwise I'm afraid my phone mightn't be usable as a navigation device.

Wierd, as my Logitech charger (don't know the amperage, around 1-2A I got fot the Performance MX) seems to be charging the phone quite faster than the included flimsy Samsung. (Up to the 90% mark, where it tapers off to trickle charging.)

Dude, that's awesome. You saved me some money with that... I was planning on buying another charger to see if it'll be better.
Good job, and thanks for doing that!

TormodMacleod said:
So are you saying that a driver upgrade would allow my phone to charge just as quickly from the computer as from the Samsung charger that came with the phone? Presumably, using Linux would also solve this?
I'm actually interested in the heat generated by charging.
...
It's a very clever feature that the software recognises that the temperature has become too high and ceases charging but I'm looking to stop this from happening. I tried turning off wifi etc but this didn't make much difference.
...
I just wondered whether using a car charger with a lower (or perhaps even higher) mA rating might cause less overheat? Otherwise I'm afraid my phone mightn't be usable as a navigation device.
Click to expand...
Click to collapse
I wouldn't worry about the heat. As you said yourself it has an internal cut-off. These cut-offs work before the device is damaged not after. High heat may reduce long term life but it's generally not an issue.
Much of the heat actually comes from the power conversion circuit at the top when charging and when the screen is on and not from the battery. While overseas I used my phone for about a month straight as a Mobile AP while on charge, now THAT generates a heck of a lot of heat and I had no ill effect after a month of daily usage for about 6 hours like this, so you should be fine.
Do NOT use an under powered car charger. At best you'll blow a fuse in it, at worst you can cause it to burn. Overloading a charger is not an effective way of limiting current. Not to mention that when overloading the voltage drops which may cause unexpected effects in the phone.
As for the USB thing, no Linux won't help. This isn't a windows issue it's a USB issue. USB2.0 ports provide 100mA of power UNLESS a device specific driver requests more power from the system. It would be a combination of a custom driver for the PC, and probably a change in the phone depending on how the phone's power circuit works (i.e. does the phone tell the power circuit it's plugged into the PC and limit the current?)
Sinotek said:
Dude, that's awesome. You saved me some money with that... I was planning on buying another charger to see if it'll be better.
Good job, and thanks for doing that!
Click to expand...
Click to collapse
You're welcome.
This was more for my own benefit really. Everything I know about electronics would lead to the conclusion of clever trickery, a potential fire hazard when using low power chargers, or that people weren't seeing right. It was driving me nuts not knowing.

I had Theo Same doubys. Thanks for testing. Appreciatie Theo effort made
Sent from my GT-I9000 using XDA App

there ARE differences between chargers.
for example:
with sgs stock charger [700mA] when i download from internet [HSDPA 7.2 Mb] and set brightness to maximum it is discharging instead of charging. the result is even worse with lower charger.
i am using 1200 mA charger from a Nokia N900 and it is doing the job very well.
some say that powerfull chargers shortens the battery life, but i do not care about that.

The data nor the theory back that up.
Suppose the phone did draw a variable current, what's to stop the resulting fire hazard of overloading the charger?
If I knew someone with an N900 I'd be happy to try it for you but given the results so far... actually I do have one more thing I can test.

Flashlight on to keep screen at 100% brightness, downloading JVP, and powered by a 30A !!! powersupply.
End result is it still uses 470mA.
There is nothing to back up the idea that different powerpacks make any difference, and plenty of logical theory as to why it would be a very bloody bad idea to blindly just start drawing power.
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garbz said:
Flashlight on to keep screen at 100% brightness, downloading JVP, and powered by a 30A !!! powersupply.
End result is it still uses 470mA.
There is nothing to back up the idea that different powerpacks make any difference, and plenty of logical theory as to why it would be a very bloody bad idea to blindly just start drawing power.
Click to expand...
Click to collapse
ah, the old computer PSU-> lab power supply trick. Favorite of EE students everywhere

Extraordinary work, garbz.

Nice Job.
So I'll look for a 1A charger in order to get it full short and dirty ;-)

thanks for this my friend kept on telling me that I need a more ''powerful" charger than the one that came with my vibrant :/

Sorry to bump an old topic but thought it worth doing as this is a very good thread to answer the question about chargers. I have a Note which comes with a 1A charger but the lead is short, I need to use an adapter to fit the plug in (as it's EU and I'm in the UK) plus the charger makes a slight high frequency buzzing noise. My N900 charger which is 1200mA works fine (and has a longer lead, is silent and doesn't need an adapter) and I assumed the device would draw the current it needs but was then concerned by some people claiming that would damage the battery, this thread shows that is not the case.
John

There's an explanation here of why different chargers do indeed make a difference:
http://en.wikipedia.org/wiki/Usb#Power
see in particular the note on the Battery Charger Spec.
In particular. my own testing shows I can go from 500ma to 700mA charging current simply by changing a small connector in line between the 7Ahr battery I'm using to charge the phone, and the phone. That's due to the nature of the short on the data pins.
There are proprietary tweaks to this mechanism; e.g. iPhones use voltage signalling between the two data lines and ground to indicate various things to the device.
All of this is only for "hosts", i.e. chargers etc, that don't implement the USB protocol and so can't engage in the normal current negotation that occurs when connecting e.g. the device to a PC.

Yeah they to I was at my uncles place and I pluged the micro-USB for sgs and charged it. I tried moving the lockscreen but the touchscreen wasn't working
Sent from my GT-I9000 using XDA App

THank you for the Review!

thanks for all the info!

Extremely slow charging?

The other night I put my note pro on the charger with around 28% battery. After 8+ hours charging it was only at like 90%. I have been noticing pretty much every time it charges. Is there something that I am missing? I am rooted, but don't mess around with much on this tablet simply because it doesn't need much tweaking. I am using an official Samsung USB 3.0 charger with a 3ft cable. So no non-standard overly long aftermarket cable or anything either.
I am thinking of doing a factory wipe on it, maybe that could help. Hope there isn't a physical issue with it because I could see Samsung denying me because of tripped Knox...
Thanks.

Whats your standby battery drain like? If you're seeing significant drain while not charging this might be an indication of something running in the background that's reducing your charge rate too. Is charging speed improved if the tablet is powered down?
As a point of reference using GSAM Battery Monitor I see a charge rate of about 1200ma at idle with screen brightness low. You may want to try a battery monitor app such as this, perhaps it will help pinpoint the issue.
Could be the charger itself . . .

You can also go Settings - General - Bttery and tap that grey bar (where reads how long you have been running since last charge)
Then check Awake.. If there is blue bar even when your device has been longer time without any using, it tells that some app or something is not letting the device go to sleep --> which drains battery.

Have you tried your original USB cable? The stock cable is longer than 3ft
Sent from my SM-P900 using Tapatalk

Did you charge on Power Saving mode? I think, that option slow down charging

Did you turn off all running settings? (WiFi, GPS, Sync). Did you Greenify all Apps?

muzzy996 said:
Whats your standby battery drain like? If you're seeing significant drain while not charging this might be an indication of something running in the background that's reducing your charge rate too. Is charging speed improved if the tablet is powered down?
As a point of reference using GSAM Battery Monitor I see a charge rate of about 1200ma at idle with screen brightness low. You may want to try a battery monitor app such as this, perhaps it will help pinpoint the issue.
Could be the charger itself . . .
Click to expand...
Click to collapse
dodo99x said:
Have you tried your original USB cable? The stock cable is longer than 3ft
Sent from my SM-P900 using Tapatalk
Click to expand...
Click to collapse
Thanks for pointing me to this app. I installed and will take a look at what my tablet is doing. Seems like I have been getting much lower "Screen on" times lately too. I don't recall installing anything that would do something to drain.
As for the charger, I bought the tablet from Amazon as open box. It was supposed to come with a charger but didn't. They gave me a partial refund and I bought a charger on ebay with the same model number as the stock one but it only came with a 3ft cable. I wouldn't think having a shorter cable would make a difference...
mozillaopera said:
Did you charge on Power Saving mode? I think, that option slow down charging
Click to expand...
Click to collapse
Never use power saving...
ShadowLea said:
Did you turn off all running settings? (WiFi, GPS, Sync). Did you Greenify all Apps?
Click to expand...
Click to collapse
I never turn off settings while charging. I don't feel that you should need to. I generally keep GPS off all the time anyway, I have a phone for Maps!
Thanks for the replies all! I will report back on what I find.

You likely have an application causing drain and GSAM should help you figure that out.
In addition I would suspect the charger; check the voltage and see if it's rated for 5.3V at 2.0 amps.

alias747 said:
I never turn off settings while charging. I don't feel that you should need to. I generally keep GPS off all the time anyway, I have a phone for Maps!
Click to expand...
Click to collapse
Keep in mind that turning off WiFi speeds up the charging by about 70%. And since we're talking about a device with 9500mAh...
It's fine that you feel one should not be required to do so. To each their own. Physics, however, has no interest in 'feelings' and what people think should happen. Turning off a service that uses a lot of power means it'll stop draining a large percentage of the feeded charge. Elementary physics. (Just like how a cup is filled faster if you stop drinking from it whilst filling it.)

muzzy996 said:
You likely have an application causing drain and GSAM should help you figure that out.
In addition I would suspect the charger; check the voltage and see if it's rated for 5.3V at 2.0 amps.
Click to expand...
Click to collapse
The charger that I have is model number: EP-TA10JWS
The output is rated for 5.3V and 2.0A.
I suppose there is a potential that I got a bum charger, or its a very sophisticated knock off. But the labeling all looks very legit and identical to my wifes Note 10.1 2014 charger.
ShadowLea said:
Keep in mind that turning off WiFi speeds up the charging by about 70%. And since we're talking about a device with 9500mAh...
It's fine that you feel one should not be required to do so. To each their own. Physics, however, has no interest in 'feelings' and what people think should happen. Turning off a service that uses a lot of power means it'll stop draining a large percentage of the feeded charge. Elementary physics. (Just like how a cup is filled faster if you stop drinking from it whilst filling it.)
Click to expand...
Click to collapse
So last night I tested and I TURNED OFF my tablet completely to charge. I think I had about 18% left when I put it on the charger and when I woke up about 7 hours later and turned it back on, it was at 91%. Does this sound even remotely close?
I also tested last night plugging in my charger and turning everything on the tablet off, WiFi, screen brightness all the way down, closed all open apps etc... In GSAM Battery Monitor my input was only like +800 mA. @muzzy996 you have 1200mA??? Seems like the issue must be the charger in light of my testing...
Another thing I tested though was using my wife's Note 10.1 2014 charger this morning. I believe it has the same output (5.3V / 2.0A) but I used the USB 2.0 cable that is included with it. I was only at like 650mA when charging. I think I will have to track down another charger and see if it makes a difference...
Thanks again for all the replies.

I believe there is a defect in the charging software or hardware. I used several iPad 2 car chargers rated for at least 10 watts. (5.2Volts x 2Amps) They take 5x longer to charge than the iPad. Talk about proprietary hardware/software.
The OEM charger EP-TA10JBE is rated at 5.3Volts x 2Amps. The voltage loss in the 4Ft cable supplied must be at least .1 volts, so I do not understand that the voltage difference should cause the charging rate to slow to a trickle.

I'm going to try this.
I'm having the same problem and I read the following in another thread. I'll let you know if it works for me. My charging time is not quite as slow as yours, but it's still slower than it was when I first opened the box and I've only had it less than 2 weeks.
"had the same problem after updating to 4.4.2. It only charged when off. When the device was on, it mentioned 'not charging' in the battery status, but in fact it did charge very slowly when the device was not in use, about 5% per hour.
Also when used, the battery was draining more quickly than before the upgrade.
This solved it for me:
- reboot in recovery mode (hold volume up, button and power while booting)
- clear cache partition
- reboot.
Looks like something in the cache is causing the system to consume (almost) more power than is supplied by the adapter..."

Working better
After clearing the system cache, the charge speed went up to about 22% per hour with the tablet shut off. Seems to be huge improvement in my case. I used the cable that came in the box with tablet.

The standard note 12.2 charger: EP-TA10JWS, The output is rated for 5.3V and 2.0A.
My Galaxy Note Edge has fast charging and regular charging capability. 2 outputs; 9.0V - 1.67A or 5.0V - 2.0A
Has anyone tried this/a fast charger with the note 12.2 ? Will it work ?
Probably not as it doesn't have the fast charging capability, but worth asking the tech savvy people out there.
Besides for travelling purposes it would be great just to carry one charger instead of 2.

globalgpj said:
The standard note 12.2 charger: EP-TA10JWS, The output is rated for 5.3V and 2.0A.
My Galaxy Note Edge has fast charging and regular charging capability. 2 outputs; 9.0V - 1.67A or 5.0V - 2.0A
Has anyone tried this/a fast charger with the note 12.2 ? Will it work ?
Probably not as it doesn't have the fast charging capability, but worth asking the tech savvy people out there.
Besides for travelling purposes it would be great just to carry one charger instead of 2.
Click to expand...
Click to collapse
Correct it will not fast charge, it needs both the fast charging supporting device and charger to work.

muzzy996 said:
Correct it will fast charge, it needs both the fast charging supporting device and charger to work.
Click to expand...
Click to collapse
Did you mean, "will not"?

globalgpj said:
Did you mean, "will not"?
Click to expand...
Click to collapse
Sorry yes, corrected.

Dont forget it has a 9500mAh battery. The Note 3 has 3200mAh and charges from 0 to 100 in 90 minutes. So you'll always be looking at at least 4-5 hours.
If you leave your connections(Wifi, gps, mobile data, etx), sync and apps running, don't complain that it takes ages to charge.
Fast Charge pre-S6 is Qualcomm tech. The new Exynos chips support their own Fast Charge, but that doesn't apply to the old Exynos devices.
The Snapdragon NotePro's have Qualcomm Fast charge. (Which is not the same as the one in the S6)
The Exynos devices do not. So the P900 will always be slower in charging than the P905.
If you have a p900 and it's slow to charge, that's why.
globalgpj said:
The standard note 12.2 charger: EP-TA10JWS, The output is rated for 5.3V and 2.0A.
My Galaxy Note Edge has fast charging and regular charging capability. 2 outputs; 9.0V - 1.67A or 5.0V - 2.0A
Has anyone tried this/a fast charger with the note 12.2 ? Will it work ?
Probably not as it doesn't have the fast charging capability, but worth asking the tech savvy people out there.
Besides for travelling purposes it would be great just to carry one charger instead of 2.
Click to expand...
Click to collapse
I tried mine with a 15V charger from my TF700T, and it didn't make any difference.
You can use the Note Edge charger, it also supplies normal levels for ordinary charging. I often use my Note 3 charger.
Sent From My Samsung Galaxy Note 3 N9005 Using Tapatalk

ShadowLea said:
You can use the Note Edge charger, it also supplies normal levels for ordinary charging. I often use my Note 3 charger.
Click to expand...
Click to collapse
I don't know the output of your charger but the correct one should have 5.3 Volts, 2 Amps output. Using other chargers which has lower output such as 1 Amp will cause a longer time to charge.
In order to verify which one is at fault, everyone should have this tool, no more guessing when you can see the voltage and charging current .
http://www.ebay.com/sch/i.html?_fro...TRS0&_nkw=usb+voltage+current+tester&_sacat=0
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
You should swap one by one, using a known working charger and cable to verify which one is the source of problem. Start in order: charger, USB cable, USB port until problem solved.
If the reading is not 5.3 V, 1.7A, something is wrong with your charger, USB cable. or USB charging port ( new one is only around $12 ). When near full charged, current should be under 1 Amp.
http://www.ebay.com/itm/Samsung-Gal...228?pt=LH_DefaultDomain_0&hash=item234b3e01b4

Beut said:
I don't know the output of your charger but the correct one should have 5.3 Volts, 2 Amps output. Using other chargers which has lower output such as 1 Amp will cause a longer time to charge.
Click to expand...
Click to collapse
The Note 3, TabPro and NotePro chargers are identical. They have literally the same EAN and product code. The only thing that varies is the cable.
I don't have any 1A chargers anymore, they're useless to me these days. Even all my car chargers are 2.1A.

Fast Chargers

The LG V10 does support Qualcomm 2.0 Fast Charging. Here are the models of Batteries, Car Chargers and Wall Chargers that I have tested and confirmed that work with the V10 . I will include some video reviews as well.
MOD Edit: Referral links not allowed and have been removed

So do you need a new charger that supports fast charging, and any micro USB cable will do?
Does the charger that comes with the phone support fast charge?

yes, the charger that comes with the V10 is a quick charge and most micro USB cables (should) work with the quick chargers.

The Samsung adaptive quick charger from the S6/Note 5 seems to be working well. Just an FYI if anyone has one laying around.

Tronsmart said:
Not all of the micro usb cable will support quick charge. you need the cable which support charging and data sync together.
The quick charge 2.0 technology need to transfer/communicate the signal from the charger to the smartphone. some cheap micro usb cable which just have the charging function won't work on qc2.0 chargers.
also the 20awg cable help to transfer high current, see the explanation from wiki:
https://en.wikipedia.org/wiki/American_wire_gauge
here is a sample photos for our cable:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
and here is another explanation from reddit:
https://www.reddit.com/r/LifeProTip..._know_why_your_smartphone_is_charging_slowly/
hope it is helpful.
All of our chargers are qualocmm certified, and all of our cables are made for quick charge.
Tronsmart
Click to expand...
Click to collapse
Yes I am trying to look back at where I got my cable now. This is the heavier duty, longer cable I use. It says in the description a few different things that makes me think it is compatible. I guess I'll find out for sure when I get the device in my hands.
http://www.amazon.com/gp/product/B00OCDZQA0?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00
Edit: I did find out that it does support quick charge, so I'm all good!
FYI I would reccommend this cable if you are looking for a longer cable that is heavy duty. I am sure most have used Anker products in the past, the quality is present in this product as well, I have had mine for close to a year with no issues.

I love Anker product, such high quality! The dual port car charger supplied 2 amps per port. The desk charger supplies 2amps per port over 5 ports and over the last year I've purchased 40+ usb cables in varying legnths. 10ft - 1ft. Connections are always snug and no wiggle on my phones. I keep giving these things away when a co worker needs a cable, they always notice that their device charges faster, especially if they no longer have the oem cable.

Quick Charge not compatible with charge-only cable
In order to prevent data theft I prefer to use a charge-only cable when plugging my phone into any port outside my home.
According to Qualcomm, Quick Charge 2.0 is designed to be connector-independent and is designed to minimize charging issues associated with long or thin cables, allowing for a superior charging experience, independent of cable type.
However, since the high-efficiency transfer of electricity requires the D+/D- data lines for effective handshaking and communication, it will not work with a charge-only cable.

I have to say the quick charge lg charger still takes twice as long as my note 4 edge to charge...

Other than stock cable, PNY cable works pretty well especially with Anker 8A intelligent charger.

drocksmash said:
I have to say the quick charge lg charger still takes twice as long as my note 4 edge to charge...
Click to expand...
Click to collapse
With screen off or you looking at it checking? The lg g4 turns off qc while screen is on. Perhaps the v10 does the same.

clockcycle said:
With screen off or you looking at it checking? The lg g4 turns off qc while screen is on. Perhaps the v10 does the same.
Click to expand...
Click to collapse
Mine enables fast charge no matter if screen is on or not.
Matt

CoNsPiRiSiZe said:
Mine enables fast charge no matter if screen is on or not.
Matt
Click to expand...
Click to collapse
Does it actually fast charge while screen is on? the LG g4 doesn't, that would be great news.

clockcycle said:
Does it actually fast charge while screen is on? the LG g4 doesn't, that would be great news.
Click to expand...
Click to collapse
I haven't noticed any significant difference between screen on or off.. Don't quote me I've had the phone less than 3 days.
Matt

CoNsPiRiSiZe said:
I haven't noticed any significant difference between screen on or off.. Don't quote me I've had the phone less than 3 days.
Matt
Click to expand...
Click to collapse
OK I see, humm try installing the app Ampere, it shows charge/discharge. It isn't exact but it gives a reference.

Will do.
Matt

I can say without a doubt charging with the Samsung quick charger from the S6/Note5 charges the V10 faster than the LG quick charger. Luckily I have several around the house.

mikeyinid said:
I can say without a doubt charging with the Samsung quick charger from the S6/Note5 charges the V10 faster than the LG quick charger. Luckily I have several around the house.
Click to expand...
Click to collapse
I think that is due to the fact that the LG charges at 2.0 vs the Sammy.
I'll have to pick up an aftermarket charger on Amazon or something. Anyone recommend one that they use with a higher charging rate than the LG one?
Matt

something i found out bay accdent is it doesnt always fast charge. its not an option to turn it off but from what i can tell if your phone is to hot when pluged in it just does a normal charge. greatest thing ever
and i did try it on two chargers that have fast charge the one in the box and the note 4 charger but it didnt start the fast charge. once the phone was cool i actually unpluged to go somewhere came back ten minutes later pluged in and there it was fast chargeing.

In response to @clockcycle
It appears though it may charge faster than normal charging methods with screen on, that it almost quadrupled charging rate with screen off according to Ampere.
Take it for what it's worth, I am not sure how accurate it is, that second screenshot was taken just after turning the screen back on, where it proceeded to recalculate and then displayed around 700 again.

CoNsPiRiSiZe said:
In response to @clockcycle
It appears though it may charge faster than normal charging methods with screen on, that it almost quadrupled charging rate with screen off according to Ampere.
Take it for what it's worth, I am not sure how accurate it is, that second screenshot was taken just after turning the screen back on, where it proceeded to recalculate and then displayed around 700 again.
Click to expand...
Click to collapse
Awesome thanks for testing that, it seems to be just like the LG G4 but slightly higher (500 screen on, 2200 screen off). Ampere is a guestimate, but I use USB Doctor sleeves to verify. What charger did you use to test?
Edit: according to your screen shots, they were 2 mins apart, you went from 8% to 11%, gained 3%~