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[Q] Nexus 4 & 7 Wireless charging oddities

Hi. I've got a Nexus 4(rev 11) and Nexus 7(2013 edish) and both are running stock unroofed 4.4.2 at the moment. I'll describe the Qi charger I using at the bottom to avoid clutter. The issue I've been having is that when I place either device on the charger at night, they both seem to charge, and then rapidly discharge once full. Using previous research, the general consensus seems to be that Qi chargers are supposed to stop at 100, and kick in again when the level drops a bit. This seems to only happen for me as I once put my N7 on the charger at 56%, and when I woke up, I found it charging at 22%. When I put the N4 on, it seems to have discharged to in between 65-78% remaining by the time I get up. Can anyone shed a possible reason as to why the devices won't continue to charge?
The charger: GMYLE (TM) Black White Wireless Mini Charging Pad Mat Qi-enabled Standard Charger (1000mA)
Model:NPL00730008

Charging Stops Overnight

Like a lot of people I charge my phone over night, but with the 6p I wake up in the morning (after a good 8hrs) and its sat on 96-98%. Even though it still says charging.
It's no big deal but when I unplug and plug back in it charges to 100% relatively quickly.
Anyone else see this? I'm using an older charger (from my nexus 4) so may try the proper one tonight.
Sent from my Nexus 6P using XDA Free mobile app

Isn't this normal behaviour? Most phones stop topping up the battery even when connected on the charger to avoid wearing off the battery.
I used to have my HTC m7 connected overnight to the charger and even though it showed 100℅ in the morning, as soon as I disconnected it from the main the indictor would drop rapidly to ~95℅ which indicated the above behaviour.
Sent from my Nexus 6P using Tapatalk

I've not seen it before. My galaxy s6 always came off charge at 100% as did my nexus4 and the 5x I owned briefly.
If this is normal and happens to other 6p owners I'm happy with that
Sent from my Nexus 6P using XDA Free mobile app

Mine is doing this as well. It seems to charge to 100%, stop charging, and not run off power at all. Since I use sleep tracking, in my case, I usually wake up to about a 90% charge. This is the first phone I have seen do this -- they usually charge to 100% and keep running off the charger. I haven't tried the stock 3A charger yet, as there really is no need for a quick charge overnight.
pahardie said:
I've not seen it before. My galaxy s6 always came off charge at 100% as did my nexus4 and the 5x I owned briefly.
If this is normal and happens to other 6p owners I'm happy with that
Sent from my Nexus 6P using XDA Free mobile app
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How in the world are you using an old charger on a Type-C Connection? (or are you using a converter?... if so, that may be the reason)

Just using a USB A to USB C cable into the power brick from my old phone.
Pretty straightforward really.
I'll try with the proper charger at some point. It's not a big deal.

Mine hasn't done that. Got it Thursday and it's had a full charge each morning. Using the supplied charger

normal behavior. it does that to protect the battery.

Every phone I've ever had charges to 100% and stays running off the charger to stay at 100%. Last night (my first night with the phone) I plugged it in with 31% and woke up with it at 81%. It clearly charged....and then stopped charging only to run off the battery while still plugged in. Not normal for any other device I've owned. I would prefer it to stay at 100% until I'm ready to unplug it. Maybe using the supplied charger will do this. I used a USB A to C cable plugged into USB wall port. I have replaced several outlets in my house to ones with built in 2.1A USB chargers.

318sugarhill said:
Every phone I've ever had charges to 100% and stays running off the charger to stay at 100%. Last night (my first night with the phone) I plugged it in with 31% and woke up with it at 81%. It clearly charged....and then stopped charging only to run off the battery while still plugged in. Not normal for any other device I've owned. I would prefer it to stay at 100% until I'm ready to unplug it. Maybe using the supplied charger will do this. I used a USB A to C cable plugged into USB wall port. I have replaced several outlets in my house to ones with built in 2.1A USB chargers.
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I'm not understanding why anyone would not use the supplied charger and cable.

bobby janow said:
I'm not understanding why anyone would not use the supplied charger and cable.
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Why should it matter? wattage is wattage. Does the phone charge differently with the stock charger? Do you always carry it in your back pocket? Do you ever use a car charger?

318sugarhill said:
Why should it matter? wattage is wattage. Does the phone charge differently with the stock charger? Do you always carry it in your back pocket? Do you ever use a car charger?
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Carry the phone in my back pocket? No, I don't but what does that have to do with the price of tea in China? I do not use a car charger either. As for wattage, I believe that the type C 3.1 chargers output at 100W and possibly 200W whereas the one you are using might deliver 18W. There might also be damage due to wiring with some of the 2.0 - 3.1 adapters but I'm still researching that.
So why wouldn't you use the type C charger? Besides, you can't plug it in backwards or upside down. And once you get a computer that supports type C the data transfer rates will be astonishing from what I've read.

bobby janow said:
Carry the phone in my back pocket? No, I don't but what does that have to do with the price of tea in China? I do not use a car charger either. As for wattage, I believe that the type C 3.1 chargers output at 100W and possibly 200W whereas the one you are using might deliver 18W. There might also be damage due to wiring with some of the 2.0 - 3.1 adapters but I'm still researching that.
So why wouldn't you use the type C charger? Besides, you can't plug it in backwards or upside down. And once you get a computer that supports type C the data transfer rates will be astonishing from what I've read.
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Do you carry STOCK charger in your back pocket.
Point is, sometimes I need to charge it at work, or elsewhere as I may use it heavily. That's why I would use another charger. Point is, why does it stop charging on the charger and not draw from the charger once it's full. Like I said, mine charged fully then stopped using the charger drawing from the battery. Kind of pointless if I leave it on the charger to be full when I leave in the morning if it's not going to be full.

I'm glad its not just me who finds this a bit odd.
I used the same charger with my nexus 5x, galaxy s6 and nexus 4 and always found the phone at 100% in the morning.
The 6p obviously works differently.

318sugarhill said:
Do you carry STOCK charger in your back pocket.
Point is, sometimes I need to charge it at work, or elsewhere as I may use it heavily. That's why I would use another charger. Point is, why does it stop charging on the charger and not draw from the charger once it's full. Like I said, mine charged fully then stopped using the charger drawing from the battery. Kind of pointless if I leave it on the charger to be full when I leave in the morning if it's not going to be full.
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I see what you mean. For a quick boost charge I can see you carrying a cord in your back pocket. I'm really trying to get a full 14-18 hours with this device no matter my usage. If I can't I really cannot justify this expense. I have 4 phones on my plan, a Samsung 5S, two iPhones 6s, and up until yesterday my N5. All other 3 got a full day plus even watching video and listening to music constantly. So no, I'm not carrying a charger, a cord or buying a car charger.
As for your problem of charging, have you tried the stock charger to see if you can get to 100%. I have already twice with no problem. Last night I wanted to unplug it once charged to see how much it drained overnight but I fell asleep at 93% and unplugged a few hours later. 6 hours off the charger it was still at 99% so I'm assuming it charged to 100 or close to it. Perhaps you can do a full charge overnight and then a spot charge during the day if you need. I'm thinking you might not.

I am also having this problem. I am using the included c to a cable to charge with. The phone stops charging around 95% and doesn't charge ever again until I unplug it and plug it back in.
These are the problems with this:
1. Cases where i do not have the included charger with me.
2. On long trips where my phone is plugged in all the time to prevent it from dying. (Streaming music, navigating, etc)
3. Sleep tracking
I'm using the Anker 5 port charging hub at 2A each port.

once your battery gets fully charged 100% - the charging stops to prevent your battery from overcharging. since your battery is not charging - your battery will drop down. once it gets down to 95% - charging resumes until it gets back to 100%.
in other words - that is normal.

Gekko2 said:
once your battery gets fully charged 100% - the charging stops to prevent your battery from overcharging. since your battery is not charging - your battery will drop down. once it gets down to 95% - charging resumes until it gets back to 100%.
in other words - that is normal.
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Every other phone I have ever had did not do this and instead trickle charged at 100% and ran everything off of the charging port, never had a phone that constantly drops to 95% then back to 100%, that would be a roller coaster during car trips. The problem I'm experiencing is not that situation either; the phone will stop charging and never get charged again, so it could drop to 80% while connected to the charger. It knows it's connected to a charger, but doesn't draw current from it. Doesn't show the charging icon or charging AC, but the lock screen shows the percentage of battery.
I do have possibly some positive observations however. Last night I decided to try it without my USB 3.0 extension cable, and only the measly 1 foot c to a cable Google provided. Without the extension cable my phone charged as it should, went to 100% and stayed there with the charging symbol still on the battery icon. Upon removal of the charger, the battery stats showed only 3 seconds of use, whereas before it would just show everything since last 100% (which was sometimes 50 hours even though i charge my phone every night). I'd have to keep observing this to see if it was indeed the extension cable.

That's interesting wrt the extension cable. I have a extension as well. Will get rid and see what happens. I keep meaning to try stock charger and stock cable but can't be bothered.
It's not normal behaviour or else it'd happen on other phones. I've had nexus 4 iPhone 4s htc one m8 Samsung galaxy s6 iPhone 5s and nexus 5x all using the same charger / extension all have charged to 100% and stayed there.. Except the 6p.
It's not a massive deal, typically it'll loose 1 or 2 percent over night once it's been to 100.

Just an update, it was the extension cable. Phone charges to 100 at stays there until unplugged as is expected behavior. Just don't use USB extension cables to charge devices

Charging Issues; Need advice

Hello,
First off I want to preface this by saying I have my bootloader unlocked, rooted, running a 6.0.1 ROM.
This past weekend I noticed that my phone wasn't charging on a generic 4 port USB charger that I have. Made sure it had power, tried it on my tablet I had laying around, and eventually got it to charge using a different cable. No problem, stuff like that happens. Noticed it was "charging slowly" Hmm..wonder if the USB charger is going back. Tried it other places, but always getting EXTREMELY slow charges. Unfortunately I had my OEM charger at work at my desk so I couldn't try that but I have a QuickCharge 2.0 car charger that I tried. I plugged it in there and I was actually LOSING charge at what seems like a faster rate than just a normal drain. WTF!?
Got to my destination (going to my buddy's house) and tried a few of his chargers; same thing, "charging slowly". Made it through the weekend, got home and the problem is still going on with all my chargers.
So today, I get to work to try my OEM quickcharge and it drains my battery as well! Oh boy. This is bad.
Anyone else experience this? Since I've unlocked bootloader and no extended warranty AND the fact that Moto Support is god awful anyway, I'm screwed when it comes to professional help. Anyone have luck opening up this beast and fixing anything? Any help or guidance would be very much appreciated.

My phone isn't charging very well either. I went out to do some errands and phone was on 84% saying it'll be charged in 35 minutes I came home three hours later it's still on 84% with 35 minutes to go and burning up to touch. This is already my fourth Moto X in the week.

xBkKx said:
My phone isn't charging very well either. I went out to do some errands and phone was on 84% saying it'll be charged in 35 minutes I came home three hours later it's still on 84% with 35 minutes to go and burning up to touch. This is already my fourth Moto X in the week.
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Fourth with issues? Hope it's not related to the same charger.
Sent from my XT1575 using Tapatalk

dottat said:
Fourth with issues? Hope it's not related to the same charger.
Sent from my XT1575 using Tapatalk
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Not the same charger but all four different chargers the phone comes with. I ordered it on Amazon with next day arrival and the first two phones had dead pixels third one was reading 138 degrees with ampere while charging and would stop and fourth (current) refuses to charge past 84% unless I have the phone off I noticed. I unlocked the bootloader on this current one though so I don't think I'll be able to exchange it now

sreister said:
Hello,
First off I want to preface this by saying I have my bootloader unlocked, rooted, running a 6.0.1 ROM.
This past weekend I noticed that my phone wasn't charging on a generic 4 port USB charger that I have. Made sure it had power, tried it on my tablet I had laying around, and eventually got it to charge using a different cable. No problem, stuff like that happens. Noticed it was "charging slowly" Hmm..wonder if the USB charger is going back. Tried it other places, but always getting EXTREMELY slow charges. Unfortunately I had my OEM charger at work at my desk so I couldn't try that but I have a QuickCharge 2.0 car charger that I tried. I plugged it in there and I was actually LOSING charge at what seems like a faster rate than just a normal drain. WTF!?
Got to my destination (going to my buddy's house) and tried a few of his chargers; same thing, "charging slowly". Made it through the weekend, got home and the problem is still going on with all my chargers.
So today, I get to work to try my OEM quickcharge and it drains my battery as well! Oh boy. This is bad.
Anyone else experience this? Since I've unlocked bootloader and no extended warranty AND the fact that Moto Support is god awful anyway, I'm screwed when it comes to professional help. Anyone have luck opening up this beast and fixing anything? Any help or guidance would be very much appreciated.
Click to expand...
Click to collapse
Question to OP: DId you ever find a resolution? I have recently noticed that my XT1575 (currently restored to stock 6.0 but still unlocked) actually LOSES charge while "charging" (as reported in Battery setting) in my Car (12vDC) and on my motorcycle (12vDC). Granted, I am running GMaps and streaming music running, among other apps... In fact, I just saw the charge drop from 74% to 68% in about 15 mins while driving this morning... On the other hand, when plugged into AC Turbo charger, I can run all those apps and then some, and charging, the battery charge goes up 1-2% per minute... Wondering if anyone else has seen similar issue when charging via DC current?

ech1253 said:
Question to OP: DId you ever find a resolution? I have recently noticed that my XT1575 (currently restored to stock 6.0 but still unlocked) actually LOSES charge while "charging" (as reported in Battery setting) in my Car (12vDC) and on my motorcycle (12vDC). Granted, I am running GMaps and streaming music running, among other apps... In fact, I just saw the charge drop from 74% to 68% in about 15 mins while driving this morning... On the other hand, when plugged into AC Turbo charger, I can run all those apps and then some, and charging, the battery charge goes up 1-2% per minute... Wondering if anyone else has seen similar issue when charging via DC current?
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Click to collapse
now that I think about it, its DC going into the phone regardless of the source, so the type current is not a factor... so assuming I don't have bad cables, what could be causing the difference?
Sent from my XT1575 using XDA-Developers mobile app
---------- Post added at 08:48 PM ---------- Previous post was at 08:14 PM ----------
Upon further research I just discovered and ordered a Qualcomm Quick Charge 2.0 capable car adapter... I'll bet the "standard" usb power the phone can draw from a cheap car adapter isn't sufficient to effectively charge on top of streaming, GPS mapping, Bluetooth stereo and screen on... Lets,see what the new 2.0 QC adapter can do next week....
Sent from my XT1575 using XDA-Developers mobile app

I've noticed issues with the charging port. I have two brand new 25w turbo chargers and neither of them connect/charge my phone. I got an OEM USB cable and connected it to my old Droid Turbo charger and that is the only charger that works for me. Bummer. Was considering sending back the phone to moto, but I'm unlocked and have a feeling they would not repair/research it...
Sent from my XT1575 using XDA-Developers mobile app

You can download an app called "Ampere" it will actually show you the charge and discharge rate that the phone is doing. Might help out in determining what is wrong.

For those experiencing issues with the device not charging to 100% when it is extremely hot, this is normal behavior. This is from Motorola...
Some facts on battery temperature
* Devices need their space; There are no on-board fans, cooling relies solely on the device being able to dissipate heat through the air. To help cooling, ensure the device is not in a pocket, purse, carrying case, or direct sunlight.
* Normal temperature is (97f) ~36c
* A user will begin to sense a “warm” device at 106f (~41c) and it will seem hot at 109f (~43c)
* Cool Down Mode kicks in at 152f (67c)
* Batteries with temps => 113f to 140f (45c to 60c) will not charge to 100% capacity
* Battery temps >140f (60c)will not charge at all
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Wireless fast charging very slow to none... anyone?

Mine is very very slow, sometimes only added 1% after an hour of fast charging.
Though when i turn off fast charging on the phone, it charges normally (faster than when fast charging is switched on).
I'm using the Samsung original fast charger (the new tilted model) by the way.
Anyone experiencing the same problem? looks like a firmware issue?

Most times you have to reposition the phone until it says that it's actually fast wireless charging. Kinda Irritating. Also make sure the fast wireless option is turned on in the settings.
Sent from my SM-G935T using Tapatalk

No such problems here. Drop it on the fast charger as it lands and away it goes in fast charger mode. Are you sure you have it enabled in settings......
Sent from my SM-G935F using Tapatalk

angusc said:
No such problems here. Drop it on the fast charger as it lands and away it goes in fast charger mode. Are you sure you have it enabled in settings......
Sent from my SM-G935F using Tapatalk
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What charger are you using? Are you verifying each time that it's actually fast charging?
Sent from my SM-G935T using Tapatalk

I use a Samsung fast wireless charger. Now I also remember that if you don't have the Samsung one then go to your local store where they do have one and land your phone on it. I read that the fast charging wireless feature only starts working after you use a genuine Samsung fast wireless charger, but remains functional thereafter.
Yes it says fast charging and I can tell by the short time from empty to full charge (usually around 1.5 hours) approximately.
Sent from my SM-G935F using Tapatalk

yes as mentioned i'm using the original samsung wireless fast charger, the latest model which it's at an angle so there won't be the problem of misplacement. and yes again fast charging is turned on, cables, adapter are all original stuff that came with the phone.......

hpl912 said:
yes as mentioned i'm using the original samsung wireless fast charger, the latest model which it's at an angle so there won't be the problem of misplacement. and yes again fast charging is turned on, cables, adapter are all original stuff that came with the phone.......
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Subscribe to this one.
S7 Edge (Exynos), using Samsung tilted wireless charger with phone original adapter / cable. Phone it's saying fast wireless charging, but is only fully charging in about 4.5 - 5 hours (starting from 10% or lower).
Tests from 45% took same, about 2.5-3 hours.
Charging by cable: about 1.5 to 2 hours. Also saying fast charging.
Samsung is waiting for me with phone and charger to test them in their shop.
Will keep you updated.

agreed, have noticed that it occasionally shows normal charging rate when in fact attached to a quick charge source... reboot/replug always seems to fix but I've learned to check each time I plug it in so that I don't come back in an hour to find it's barely moved

gaurika said:
Subscribe to this one.
S7 Edge (Exynos), using Samsung tilted wireless charger with phone original adapter / cable. Phone it's saying fast wireless charging, but is only fully charging in about 4.5 - 5 hours (starting from 10% or lower).
Tests from 45% took same, about 2.5-3 hours.
Charging by cable: about 1.5 to 2 hours. Also saying fast charging.
Samsung is waiting for me with phone and charger to test them in their shop.
Will keep you updated.
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Fast charging by cable, normally takes ~100mins from 0-100% on S7 Edge. However, my S7E has the same problem as yours with mine charging at average 25% per hour with and without the wireless fast charge option checked.

s8 overnight+excessive charging

is it safe to leave the device on the wireless charger after 100% charge level? i have the same question for wired fast charging.

wired charging is no problem, since it stops to charge when it's full. even if it shows 100% it's not, because it loses a bit when it's fully charged for a while.
when i use wireless charging over night, my phone is warm or even hot every morning. batteries don't like heat, so i asume it will be damaged after some time.
Do you guys have the same experience with wireless charging? (I'm only using original samsung chargers with my exynos s8)

On my note5 (S8 arrives today). Over night wireless charging did not result in warm phone in morning. Could be because I purposely bought the slow or regular charge cheotech charger
Sent from my iPhone using Tapatalk

even i have the non-fast charge wireless charger.

I only charge my phone once a day which is when I go to bed, but I turned fast charging off since I don't need it to fast charge overnight. With the previous Samsung wireless charging pad, I'd wake up to a warm phone in the morning (I've just been having problems with the older versions in general). Finally bought the new convertible charger since it was on sale, and I no longer wake up to a warm phone.

I have a none fast charge pad and use it overnight. No warm phone in the morning and battery capacity isn't decreasing very much at all according the Accubattery.