Very slow charging - Nexus 9 Q&A, Help & Troubleshooting

I've had my nexus 9 now for about 2 months and I usually charge it overnight. The past few days I've noticed that in the morning it wasn't full. I tried a different charger besides the oem one included and had the same problem. The screenshot from gsam shows how the rate of charge goes all over. Has anyone else experienced similar issues? Could this be a problem with my charger, nexus 9 or some app that is using excessive battery in the background?

Try a different cable. Then check in settings, battery to see if you have ac charging or usb.
Sent from my Nexus 5 using XDA Free mobile app

tldr;: quickly unplug and replug the cable to fix this
Long version:
jd1639 said:
Try a different cable. Then check in settings, battery to see if you have ac charging or usb.
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
I tried different three cables, three different chargers. The one shipped with the N9 behaves really bad. The N7 one works good - if it works, as well as another 2A charger. what I get is this:
You can see two nightly charging periods, both with the same charger/cable. One night it works as expected, the other night it just loads slow.
I connected a power meter and noticed the following: very often after connecting the Nexus 9 to the Charger (with the meter in between) it will draw only 500mA or even less - no matter what output the charger offers. But simply disconnecting the cable and reconnecting it will suddenly allow the device to draw the maximum possible like 1.8A or so.
So, last night I forgot to re-plug the charger cable and therefore got the slow loading.
I'm thinking of asking to exchange the tablet but if all behave the same? Sad

jd1639 said:
Try a different cable. Then check in settings, battery to see if you have ac charging or usb.
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
What I noticed is with the provided cable it starts out as USB and then switches to ac a few seconds later. With a different USB cable it went immediately to ac charging.. I think what is weird is I never had a problem with this until recently. Is the problem there is something wrong with the USB cables they shipped?

Related

Slow charging

Hi, my s3 charges very slow. he's charging for about six houres now and he's at 43%...
Could it be the USB cable?
Heeeelp!!!
Sent from my GT-I9300 using xda app-developers app
Check your AC adapter, especially if you're using the travel adapter. If the connection is loose, it will think you're charging with USB. Go to your phone settings and make sure it says "Charging (AC)" and not "Charging (USB)"....unless you ARE charging with USB, then it's supposed to be slow...iono about 6 hours though...
sam-san said:
Check your AC adapter, especially if you're using the travel adapter. If the connection is loose, it will think you're charging with USB. Go to your phone settings and make sure it says "Charging (AC)" and not "Charging (USB)"....unless you ARE charging with USB, then it's supposed to be slow...iono about 6 hours though...
Click to expand...
Click to collapse
It says AC...
Check..
Are you charging from computer or the power point. Are you using the charger you got with your phone?
I had the same problem with my phone. Turned out it was the USB cable. Got it replaced from Samsung. You might want to check a different USB cable or a different charger. If you are trying a different charger do make sure the output matches with the stock charger. Also have you tried resetting it back to factory default?
Sent from my GT-I9300 using Tapatalk 2
Charging from powerpoint... wtf? After 4 houres he didn't charge at all... ?? Trying a new cable now!!
Replace
liobeir said:
Charging from powerpoint... wtf? After 4 houres he didn't charge at all... ?? Trying a new cable now!!
Click to expand...
Click to collapse
Yep its definitely the cable. you should get it replaced :laugh:
A new cable fixed it! Srry for the panic!!!
Sent from my GT-I9300 using xda app-developers app
Battery charging incredibly slowly even after switching cables
I got the notification to update my I9300 to Jelly Bean yesterday and went ahead with it. The battery lasted an okay enough time, but I left it plugged in using the stock wall charger overnight. After almost 11 hours, it has only gone from 10% to 75% and I've seen it drop a couple of times while I've gone through the settings. Switching to another charger doesn't seem to make a difference and using the CurrentWidget app shows about 999mA all the time. I haven't rooted it or anything, so it has been difficult to find threads with the exact same issue. Is anyone else experiencing something similar? Thanks!
pazow said:
I got the notification to update my I9300 to Jelly Bean yesterday and went ahead with it. The battery lasted an okay enough time, but I left it plugged in using the stock wall charger overnight. After almost 11 hours, it has only gone from 10% to 75% and I've seen it drop a couple of times while I've gone through the settings. Switching to another charger doesn't seem to make a difference and using the CurrentWidget app shows about 999mA all the time. I haven't rooted it or anything, so it has been difficult to find threads with the exact same issue. Is anyone else experiencing something similar? Thanks!
Click to expand...
Click to collapse
hi there i just got the same problem as you are getting right now im observing my gs3 and found the charging is very slow 1% evry 30mintues and that the condition is the brightness is low wifi and 3g is off i notice this happen just this morning after 24 hour of chargin using the AC charger from the galaxy s2. right now im using usb cable plugin to the wall out let and also tried plug it in to usb port still having slow charging issue my s3 is JB updated and that it is not rooted, before all this issue happen i was using the same usb cable tha im using bow 2days ago and i have no issue i could watch movie while plugin to the usb port or the wall outlet and im still around 94 to 97% charge with full brightness on and wifi and 3g is on, im in singapore and the outlet here is 220v. ill try to check if might be thusb cable is the issue r not.
my problem is the cable. i used my old samsung phone's charger and it worked!
Same here..
Same problem here, the i9300 charged almost nothing through the night. It recognised the charger as AC. After I woke up, I just took the cable out and reinserted it, then it charged way faster the short while before I went to work. I read somewhere that phones with jelly bean installed OTA over gingerbread could have this problem? I can't really say if it's the charger, the cable or the phone that is the culprit. I have previously had a problem with getting the phone to accept my car charger as well..
The cable you use makes a huge difference.
Best to use the original cable, using an old Nokia cable also works fine.
Be ware of 3rd party cables that for some reason dont deliver sufficient juice to the phone and then it charges very slow....
I guess I should add that I used the original cable and charger. I'll come back with a post if I experience more problems.
Sent from my GT-I9300 using xda app-developers app

Charging Woes?!

I just got my LG G2 yesterday. I also have a Nexus 7 2013 and an old Galaxy Nexus. I have a Nexus 7 charger at home and work. I have a modified Fast Charge 2.0A Car charger.
My N7 and GN could "AC" charge off of all of them. The G2 is "slow" charging off all of them. They are all 3 different models of chargers, all above 2.0A so there is plenty of oomph to get it the power it needs.
So whats up with that?
I just tested it. It isn't the Charger but the damn cables. Does LG have some kind of funky pinout for the charger?! Using the supplied cable, it is working on all of my other chargers. If I use my old cable it "Slow Charges" even with the included LG USB Charger.
So something in that cable is altering the amount of power it gets. That SUCKS!
My Nexus 7 will AC charge off the LG Cable. So it's something with that cable that the G2 likes.
LG is notorious for changing stuff around. On the G2x they flipped around the headphone control pins and came out with an additional headset for extra $$ which rendered every other headset with music controls useless. So basically now I have to go and replace all of my USB cables with something LG likes (which will almost be impossible to order something online). Anyone else having issues with other chargers? Luckily it IS taking a charge but just at USB speeds (Slow charge). I use Qi Charging at home for at night, so that isn't an issue but in my Home Office, Work Office, and (especially) my Car I need a fast charge. In the Car, using GPS with the screen on will still deplete on USB power. A fast charge is the only one that can still charge the battery under a heavy load. Similar to watching a movie probably.
All my USB cables woks fine. I would use the included Amazon Kindle cable since it is easily the longest cable with out issue. However older cables do have the problem you described but I suspect it isn't something LG specifics but rather the amount of pins connected in the cables.
-LG G2
I found that my Samsung cables from my S4 and Note 2 work fine with the G2, but any of my other cables, whether they be the cheap $3 ones, ones from other phones, or expensive ones, only charge at the slow rate. I'm hoping we can get a custom kernel that removes that restriction.
So it charges a little slower. Is this a major issue? If so, use the charger provided. Failing to see the problem here.
Maybe its just me. I get that a lot.
My Note 2 2A charger and USB works just fine. If not faster.
Sent from my LG-D802 using xda premium
My N7 2013 charger works perfectly.
player911 said:
I just got my LG G2 yesterday. I also have a Nexus 7 2013 and an old Galaxy Nexus. I have a Nexus 7 charger at home and work. I have a modified Fast Charge 2.0A Car charger.
My N7 and GN could "AC" charge off of all of them. The G2 is "slow" charging off all of them. They are all 3 different models of chargers, all above 2.0A so there is plenty of oomph to get it the power it needs.
So whats up with that?
I just tested it. It isn't the Charger but the damn cables. Does LG have some kind of funky pinout for the charger?! Using the supplied cable, it is working on all of my other chargers. If I use my old cable it "Slow Charges" even with the included LG USB Charger.
So something in that cable is altering the amount of power it gets. That SUCKS!
My Nexus 7 will AC charge off the LG Cable. So it's something with that cable that the G2 likes.
LG is notorious for changing stuff around. On the G2x they flipped around the headphone control pins and came out with an additional headset for extra $$ which rendered every other headset with music controls useless. So basically now I have to go and replace all of my USB cables with something LG likes (which will almost be impossible to order something online). Anyone else having issues with other chargers? Luckily it IS taking a charge but just at USB speeds (Slow charge). I use Qi Charging at home for at night, so that isn't an issue but in my Home Office, Work Office, and (especially) my Car I need a fast charge. In the Car, using GPS with the screen on will still deplete on USB power. A fast charge is the only one that can still charge the battery under a heavy load. Similar to watching a movie probably.
Click to expand...
Click to collapse
Have you tried going to settings>general>PC connection and setting "charge phone" there, as the phone limits the current allowed through if it's on MTP because MTP simply can't handle it.
Sent from my LG-D802 using xda app-developers app
Semantics said:
My N7 2013 charger works perfectly.
Click to expand...
Click to collapse
I am also using N7 2013 charger and it charged pretty fast. But now i'm also trying out a speakerdock. I don't know how fast that is but the n7 charger is pretty fast.
Sent from my LG-D802 using xda app-developers app
I have the same problem OP. if I don't go to bed early enough for slow charge to feed this monster battery I wake up below 100%. It really isn't that big of an issue because the battery lasts anyways but I don't like leaving home below 100%.
Sent from my LG-D800 using xda app-developers app
rfarrah said:
So it charges a little slower. Is this a major issue? If so, use the charger provided. Failing to see the problem here.
Maybe its just me. I get that a lot.
Click to expand...
Click to collapse
The Problem is that it is annoying. Not only is it charging "Slower" but also throw a icon up in the Status bar that you can't dismiss that says "Slow Charging. To Charge faster, use the original charger".
But I want to repeat that it is NOT the actual charger but the USB cables. It WILL fast charge (aka normal charge) using all of my various chargers WHEN I use specific USB Cables. Most of my cables will only slow charge, which is equivalent to a USB trickle charge that can't even charge it fast enough to power the screen. If you use the device in this mode, it still loses power with the screen on.
It just seems there is something in the cable itself that is either not connected or passing through the info to turn up the faster charging. I know the cables are Power+Data cables because I use them for ADB and MPT.
Most cables are not working. I've found a few that are. Unfortunately my 10ft desk cables and my curly car one is NOT working.
The Original Nexus 7 was picky about chargers. It wouldn't even see my car charger where my Galaxy Nexus and New Nexus 7 2013 both show AC (fast charge).
I think the difference between a slow charge and a fast charge is something like 0-100% on fast charge is 3 hours where it's like 9-10 on a slow charge. THAT is the problem.
Update:
Seems this is a legitimate case regarding the Verizon LG G2s AFTER they've received the latest OTA update. It will only charge normally on the included cable. All other cables will result in a Notification that the phone is "Slow Charging" and charges only on 500mAh. You cannot dismiss the notification. Which is the annoying part.
Current ongoing discussions are here:
http://forum.xda-developers.com/showthread.php?t=2460881
As of this posting, it affects all Verizon G2 users and there is no solution. We suspect it is just a Verizon bug. No other cables will charge normally.
No. Mentioned in that thread, my car charger from Verizon charges at ~1000mA. Long, curly, and thick. The new one with the LED and shorted pins. Attached cable and USB work on said charger. The problem is AWG, short, and voltage drops. I have yet to find a working usb cable though.
Mine (D802, EU model, GB variant):
- Belkin Charger 2.1A, N7 2013 cable -> slow charging
- N7 2013 charger + N7 2013 cable -> fast charging
So it's not just the cable; it's also dependent on the charger.
The voltage drop in the cable will cause the phone to draw a substantially lower charge. Therr doesn't seem to be anything unusual about the cable other than it being unusually good quality, being thick and short.
When charging, it's important having a charger with the data pins shorted, but I think most wall charger are. The slow charge warnings are something special in the Verizon models, I only get a slow charge warning when It's actually slow on my d802.
It will appear as though there is a difference of what will happen if there is a voltage drop in the cable based in your carrier model, but the hardware which charges the phone should be standard, albeit probably better quality than most other chargers.
Sent from my LG-D802 using XDA Premium 4 mobile app
Hmnmm
I stopped worrying about cables, adapters, etc by using a TYLT VU wireless charger. It chargers both my Verizon lg g2 and my Nexus 7-2013 fully and quickly. My g2 takes only 2-3 hours and my Nexus is in a leather case.
No wworries, just lay either one on its 45 degee angle platform and forget about it. Truly a wonderful charger.
I have a Samsung Qi Charger. I don't worry about it but there is a software bug with the Verizon model since the OTA update. Another thread listed above tells of the details.
Sent from my Nexus 7 using XDA Premium 4 mobile app
the solution is simple. just shortcircut data+ and data- and it will fast charge.
hopefully som Kernel hacker can build us a new Kernel. when the phone detect data connection it goes to 500mah. if u chortcircut them 1a+
maydayind said:
the solution is simple. just shortcircut data+ and data- and it will fast charge.
hopefully som Kernel hacker can build us a new Kernel. when the phone detect data connection it goes to 500mah. if u chortcircut them 1a+
Click to expand...
Click to collapse
This is NOT the case. The Verizon variant is very picky and requires a 24g USB 3.0 cable or else it will force slow charging at 500mah.
There is a whole thread with findings thats like 30 pages long. The Verizon model is not behaving like the other variants, so unless you have a Verizon model with the latest OTA and have personally tested and found a working solution, then you need not comment.
This thread should be closed so random uninformed persons stop making false accusations. This thread was started over a real problem but didn't take off. Another thread was created that did, and it is linked above. This is a real problem with a real solution. All real findings and discoveries are listed in that active thread listed above.
This should be a place holder for searches but needs no new comments. Please direct all comments to the other thread linked above.
Sent from my Nexus 7 using XDA Premium 4 mobile app
And linked here for easy reference:
http://forum.xda-developers.com/showthread.php?t=2460881
Swyped from my Incredible 4G using Tapatalk Pro 12-10

Inconsistent charging speed

Hello,
Lately I've been having a weird issue with charging my I9300 device:
When I charge the device using the charger (which is original, by Samsung) , sometimes it takes a huge amount of time to charge, and if I also use the device (even for simple things) it actually drains the battery instead of charging it.
I've installed "Galaxy charging current" app, which also shows weird results:
When I have this issue, the average/maximum value is about 400mA or even 100mA , but when I disconnect the USB from the device and reconnect it, the values can change to 900 or 999 or even a bit higher.
My device is running on CM rom version "11-20140612-NIGHTLY-i9300" .
I'm not sure if it's related to the rom , the kernel or something about the hardware.
I've checked the battery status by going to a hidden (?) setting (using my app btw) of "Testing"->"Battery information", and saw that for "battery health", it says "Good". Attached a screenshot of what I see.
Can anyone please help?
Also, is there maybe an app that can warn me when the device is being charged yet it has the battery being drained? Or maybe give me an estimated time till the battery will finish being charged? I also hope that such an app won't drain the battery by itself...
This behaviour is caused due to the inbuilt charging protection mechanisms.
Its usually the cable. Samsung one is known to be crappy. Get a proper one and try.
If you are still experiencing issues plug it in to a different port. Front panel USB ports are sometimes too weak to supply high currents
Sent from my GT-I9300 using XDA Free mobile app
nkirk said:
This behaviour is caused due to the inbuilt charging protection mechanisms.
Its usually the cable. Samsung one is known to be crappy. Get a proper one and try.
If you are still experiencing issues plug it in to a different port. Front panel USB ports are sometimes too weak to supply high currents
Sent from my GT-I9300 using XDA Free mobile app
Click to expand...
Click to collapse
Is it possible it's just the cable and not the charger?
I thought that cables are "stupid" .
EDIT: that's weird.
I tried 2 other cables: an old one of LG, and a new one of Chromecast. Both showed about 460mA in the app, no matter how many times I re-connected the device to them.
I've also tried to connect the Samsung's USB to the computer's front USB, and it gave me 400mA, but I think this is more expected.
Do you think that using a different new USB cable will solve it? or maybe it's the charger?
EDIT: just tried a new Samsung USB, and it seems to work just fine.
I didn't know USB cables are so different.
i olso had problem with charging..stock charger ...slow charging and battery drain on charge ....it was a problem with wall charge unit ...i used other phone's charger but max on that was 700 mAh and phone charged normaly.(but slowly)..now again my stock charger is working again plus i have 2m cable aftermarket ....can that be a softvare issue...if unit isn't good than it souldn't charge now normaly

Insanely Slowing Charging when connected to Computer USB Port?

For the few days I've had my G5 I've noticed that this phone charges extremely slow when connected to a computers USB Port. Now I'm not stupid, and I realize that USB ports don't draw that much power at all. The reason Im concerned is that my old G2 on the exact same PC USB port probably charges almost twice as fast at least. Anyone know what might be going on? The cable should be fine, I'm using this: http://www.amazon.com/Cable-TechMatte-USB-C-Nexus-Black/dp/B01706YAXY . Thanks in advance.
Mine charged super slowly on USB as well, using the stock charger. I hadn't yet plugged it into the wall so I wasn't "used to" faster charging yet. That said I'd have to do a side-by-side with my G3 to really see.
panamaniac said:
Mine charged super slowly on USB as well, using the stock charger. I hadn't yet plugged it into the wall so I wasn't "used to" faster charging yet. That said I'd have to do a side-by-side with my G3 to really see.
Click to expand...
Click to collapse
You mean the stock cable? This is just a problem with the pc usb port. Wall charging is fine.
UnderTheAir said:
You mean the stock cable? This is just a problem with the pc usb port. Wall charging is fine.
Click to expand...
Click to collapse
I mean the stock cable using a usb port on my macbook pro, yeah—same issue as yours, no?
panamaniac said:
I mean the stock cable using a usb port on my macbook pro, yeah—same issue as yours, no?
Click to expand...
Click to collapse
Yea was just a bit confused since you said stock "charger". Don't know why this is happening.
A quick google didn't reveal anything about QC 2.0 charging slower on computers than regular chargers. Since you have the stock cable too, have you compared those two to see if your amazon cable is the culprit?
UnderTheAir said:
For the few days I've had my G5 I've noticed that this phone charges extremely slow when connected to a computers USB Port. Now I'm not stupid, and I realize that USB ports don't draw that much power at all. The reason Im concerned is that my old G2 on the exact same PC USB port probably charges almost twice as fast at least. Anyone know what might be going on? The cable should be fine, I'm using this: http://www.amazon.com/Cable-TechMatte-USB-C-Nexus-Black/dp/B01706YAXY . Thanks in advance.
Click to expand...
Click to collapse
Can you download the app Ampre and tell me what the charge rate is? mine is fluctuating between 50mA to 740mA while plugged in to a SS (SuperSpeed) USB and max of 200mA while plugged into a regular USB. This a very good app to determine the quality of a wall charger. It will give you the Max USB current that the phone detects. I'm using original cord with phone.
Fadman37 said:
Can you download the app Ampre and tell me what the charge rate is? mine is fluctuating between 50mA to 740mA while plugged in to a SS (SuperSpeed) USB and max of 200mA while plugged into a regular USB. This a very good app to determine the quality of a wall charger. It will give you the Max USB current that the phone detects. I'm using original cord with phone.
Click to expand...
Click to collapse
Seems weird. Getting anywhere between 10mA and 210mA with a Max USB Current of 500mA.
UnderTheAir said:
Seems weird. Getting anywhere between 10mA and 210mA with a Max USB Current of 500mA.
Click to expand...
Click to collapse
I don't think its that wired if your plugged into a regular usb and not the superspeed USB.
Fadman37 said:
I don't think its that wired if your plugged into a regular usb and not the superspeed USB.
Click to expand...
Click to collapse
When I get home Ill Ampere my other phone too. And see what the difference is.
There probably isn't a problem at all. The reason it seems your G2 charged faster is because it's battery is smaller than the one in your G5.
Sent from my SM-G935T using Tapatalk
jrwingate6 said:
There probably isn't a problem at all. The reason it seems your G2 charged faster is because it's battery is smaller than the one in your G5.
Sent from my SM-G935T using Tapatalk
Click to expand...
Click to collapse
But it's not. The G2 had a 3000maH battery. The G5 has a 2800.
UnderTheAir said:
But it's not. The G2 had a 3000maH battery. The G5 has a 2800.
Click to expand...
Click to collapse
Wow....seriously? That's odd.
I charged mine for a bit today off a MacBook Pro (retina) and of course, it was slower than the wall charger and reported as charging "slowly" but the % it was increasing by was as I would expect and similar to that of the Nexus 5X. This was with the screen off. Did you have your screen on at all while charging? One thing I noticed with the 5X was that if you're using the phone or just have the screen on then the mA that the phone pulls from a computer USB massively dropped for some reason.
I guess the screen was on for some of the time. But there were whole hours where it wasn't. It think it was probably on plugged into the computer for like 3 hours, and got maybe 15% tops.
I used Ampere to check this against my G2 at home. Both were pulling the same amount, somewhere around 150-200 on average. Don't know, maybe its all in my head, but 3Hrs for 15% seems super slow even for a pc usb 2.0 port.
Yes that is normal
USB tops out at 500mah while 3.0 USB tops pit at 800mah I think
Could it be a false positive? You know that some devices report different charges... My old device had 100% show until it hit 95, then after it would stabilize. Charging could be the same. A lot of devices report charges at different rates at different parts of the battery... Regardless, usb charging has always been slow. It also depends if it's purely charging or also allowed to connect and sync. Then there is a difference as well... Many many factors to look into, honestly.
Sent from my SM-G935F using Tapatalk
Most laptops will only out out 0.5a per pair of ports. Desktop can put out more of course. Compare that to your included charger with 1.8a, or a normal 1a charger, big difference. And if you have the phone awake, it pretty much isn't going to go up lol
Sent from my LGLS992 using XDA-Developers mobile app
For what it's worth my s7e charges very slow via usb to computer.
Sent from my iPhone using Tapatalk

Slow charging with phone turned On

Hello dear fellows- i am facing a very strange issue on my lg g5 (850).
I have a third party charger (Aukey QC 2.0) with a usb A to Usb Type C cable. This charger never failed me once on any of my Samsung phones. Quick charging always worked as it should but with lg g5 its charging speed is very slow. According to Ampere app its just 310 mA. After connecting this charger it even shows fast charging notification but fast charging is not there.
Today i've decided to charge it after turning it off completely and guess what... It was charging really fast as it should while turned On.
Now i am confused whether it's LG's software which is preventing 3rd party cables/chargers to charge fast while turned On or is it something else.
Any input guys or similar experience?
Sent from my LG-H850 using XDA-Developers mobile app
It's always possible an app is using a lot of battery while you're charging. So the phone charges slower. Question though, why don't you just use the provided charger from LG?
Sent from my LG-H850 using XDA-Developers mobile app
davitox87 said:
It's always possible an app is using a lot of battery while you're charging. So the phone charges slower. Question though, why don't you just use the provided charger from LG?
Sent from my LG-H850 using XDA-Developers mobile app
Click to expand...
Click to collapse
Unfortunately, the LG charger was lost last week during my travel so by chance I had this Aukey charger lying around which is Quick Charge 2.0 supported so i am trying to accomplish the original results with it until i'll get my hands on a QC 3.0 compatible charger.
Hm, my Aukey Quickcharge car charger even works fine with my phone.
Make sure you aren't using the phone while charging it, it will always charge much slower.
I have some doubts on my data cable. Will try to swap it with another one and will test again.
Sent from my LG-H850 using XDA-Developers mobile app
Swaping cables didn't help either
Sent from my LG-H850 using XDA-Developers mobile app
I can confirm that the LG software does not prevent fast charge with 3rd party chargers and cables.
I'm using a 3rd party QC 3 charger with a 3rd party cable, and fast charging is working just fine when phone is powered on.
And in Battery Monitor Widget I can see that it actually is fast charging and is using QC 3 to throttle charging amperage.
However I've experienced a couple of times, when changing cable in the charger, that it wouldn't fast charge. It was solved by removing the cable from the charger and connect it again, and then it works just fine afterwards.
rd-Target said:
I can confirm that the LG software does not prevent fast charge with 3rd party chargers and cables.
I'm using a 3rd party QC 3 charger with a 3rd party cable, and fast charging is working just fine when phone is powered on.
And in Battery Monitor Widget I can see that it actually is fast charging and is using QC 3 to throttle charging amperage.
However I've experienced a couple of times, when changing cable in the charger, that it wouldn't fast charge. It was solved by removing the cable from the charger and connect it again, and then it works just fine afterwards.
Click to expand...
Click to collapse
Thanks for the confirmation and relevant information.
Right now i only have QC 2.0 charger but i will try to arrange QC 3.0 charger soon to remove any of my doubts.
Sent from my LG-H850 using XDA-Developers mobile app
Seems like slow charging has something to do with the heat/temperature of the battery or overall phone. If i try to charge it when the battery temps are around 30 then it charges really fast but if the temp is above 30 then software somehow restricts the fast charging to avoid any damages.
I am not sure if the above analysis is valid but my observation has lead me to this point only so far.
Sent from my LG-H850 using XDA-Developers mobile app
lethalfriend said:
Seems like slow charging has something to do with the heat/temperature of the battery or overall phone. If i try to charge it when the battery temps are around 30 then it charges really fast but if the temp is above 30 then software somehow restricts the fast charging to avoid any damages.
I am not sure if the above analysis is valid but my observation has lead me to this point only so far.
Sent from my LG-H850 using XDA-Developers mobile app
Click to expand...
Click to collapse
I learned 2 things from my testing using ampere and a drok USB current meter:
First, ampere isn't really that accurate when it comes to this phone and charging currents. It was consistently about 200mah off.
Secondly if the phone is even somewhat warm, it will limit the charge current to ~300 mah with the screen on. However if you turn the screen off, it returns to full charging speed (1.8 amps in the case of my charger) I think it is some sort of thermal throttle to keep the battery from getting too hot.
straxxus said:
I learned 2 things from my testing using ampere and a drok USB current meter:
First, ampere isn't really that accurate when it comes to this phone and charging currents. It was consistently about 200mah off.
Secondly if the phone is even somewhat warm, it will limit the charge current to ~300 mah with the screen on. However if you turn the screen off, it returns to full charging speed (1.8 amps in the case of my charger) I think it is some sort of thermal throttle to keep the battery from getting too hot.
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since i updated to D it always says slow charging use genuine cable an charger. I already am ?
jazz452 said:
since i updated to D it always says slow charging use genuine cable an charger. I already am
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That really is frustrating. I always see fast charging when plugged in, although it definitely is not fast at all if you are using it or have the screen on .
Are you plugged into a wall outlet directly? Not an extension cord? Sounds like a warranty replacement may be in order, it's possible there's something faulty with your USB C connector.
Have I not voided warranty with unlock? thanks
Tried with xiaomi charger and it works, no joy with original.
Must be faulty lg charger using same cable
I have LG G4 and I was facing the exact same problem. The phone would charge very slow while screen was on. Once I let the screen go off the phone charged at the expected rate. It seems LG is incorporating some serious throttling in their phones.
lethalfriend said:
Hello dear fellows- i am facing a very strange issue on my lg g5 (850).
I have a third party charger (Aukey QC 2.0) with a usb A to Usb Type C cable. This charger never failed me once on any of my Samsung phones. Quick charging always worked as it should but with lg g5 its charging speed is very slow. According to Ampere app its just 310 mA. After connecting this charger it even shows fast charging notification but fast charging is not there.
Today i've decided to charge it after turning it off completely and guess what... It was charging really fast as it should while turned On.
Now i am confused whether it's LG's software which is preventing 3rd party cables/chargers to charge fast while turned On or is it something else.
Any input guys or similar experience?
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I think you can not fast charge while the phone is turned off. Maybe someone can start another thread where we can compare battery logs because this will help to see the amount of time used for charging. Is there any way of seeing if the device is using QC 2 or 3?
LG G5 on 7.0
I just got a Warranty phone because of GPS pins lost contact with case. Now I'm getting the slow charge message. I just found if I flipped the USB C over it fast charges. Just thought I would share though doubt y'all wouldn't have learned this by now with all of the testing you've done already.
charlyRoot said:
LG G5 on 7.0
I just got a Warranty phone because of GPS pins lost contact with case. Now I'm getting the slow charge message. I just found if I flipped the USB C over it fast charges. Just thought I would share though doubt y'all wouldn't have learned this by now with all of the testing you've done already.
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Click to collapse
I experienced that too. Isn't it strange?
Also, I experience with some chargers, the phone will just start charging for some seconds and then act as if the cable was unplugged and then start charging again. I don't know why. Anyone experiencing this too? In this case, it didn't help to flip the cable...
So disappointed with my G5 now.
Was great to start with now it's slow charge. Got new batteries but the same. Will charge off till about 5/6% then switch on. Lovely phone now just useless. Even got the phone and amp modules. Lol
caesium2 said:
I experienced that too. Isn't it strange?
Also, I experience with some chargers, the phone will just start charging for some seconds and then act as if the cable was unplugged and then start charging again. I don't know why. Anyone experiencing this too? In this case, it didn't help to flip the cable...
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Click to collapse
This is a problem with the make of the charger. I have some Choetech QC chargers, and the programming in the QC is faulty. Some safety mech kicks in, turns off the charger, then turns back on again, over and over. I have some Tronsmart chargers and there is no issue. Of course, the OEM LG one works fine too.

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