Hello community.
I am experiencing this problem since around three weeks. My Nexus 7 won't charge with full speed, I even think it is only charging with lower than the half of the rated 2 amps of the stock charger, or even less. As you can see in the attached screenshot, it behaves like it is receiving zero to none power, but the status sais it is in fact charging... I am using CoolTool to monitor the charge rate. While the screen is on and my tablet is just sitting there idle, it is "charging" with about -50mA (slowly discharging) and while watching youtube videos, it discharges with about 450mA. While the screen is off, it actually charges with arond 400mA MAX. While I was typing this it discharged with around 300mA.
I have not checked the resistance of the stock charger nor the cable, and I have yet to try making myself another fastcharge cable.
I am using the stock charger with the stock charging cable, and I recently upgraded to the latest SlimRom and FauxKernel.
Is this some kind of software failure or is my tablet/charger/cable broken?
Is someone experiencing similar problems?
(I have problems uploading pictures, google drive must be sufficient)
https://docs.google.com/file/d/0B3NjKaD9eYHeUFg3RVhEdk4xNTQ/edit?usp=docslist_api
https://docs.google.com/file/d/0B3NjKaD9eYHeVnh6ZGswVGNpS1E/edit?usp=docslist_api
All i can think of is ur using low amp charger try using official 2.1amp charger that came with the device.
Please ignore my spelling mistakes. English is not my native language.
Related
Hi everyone!
I'm the happy possessor of a three-week-old Nexus 4. I'm writing because I think I might have some problems with the charger. If I connect the AC plug to the wall (without connecting it to the phone) and then I unplug it after two seconds and I bring the adapter to my ear, I can distinctly hear a buzzing noise.
As long as the charger is working fine, I said to myself, I'm not taking it as an issue. Well, I think that now something is maybe going wrong: charge times are unacceptable: yesterday when the phone was at 1% of battery left I switched it off and plugged it to the wall. I let it charge for three and a half whole hours before it finally finished charging. Charge times are almost similar when the phone is on, but I don't have to touch it, otherwise it's going to take ages before it fully charges.
Before trying to charge the Nexus 4 with HTC Desire's charger (I haven't done so already as it's written all over the place to always charge phones with the chargers provided), I wanted to know your experience: does your charger buzz as well if you plug it to the wall and you bring it to your ear?
How long does a full charge generally take to you?
That buzzing noise is pretty normal for such AC power supplys. I think most of them do the buzzing thing.
My experience with charge times are similar to yours. From 0% to 100% is about 3 hours with stock charger. 3 hours isn't exactly great, but considering the rather high battery capacity, it isn't bad either. But you are right - If you have a charger with a higher charging current, you can try if it will charge faster.
No matter what amperage charger you use, your phone will only draw a set amount of amps
Thank you all, guys! I can stop worrying now
I don't actually suffer from battery life problems like some other owners. My problem is that it takes for ever for my phone to charge. My phone has been charging over USB attached to my computer for 8 hours and is only at 83%. When it's attached to the mains it's pretty much the same story. I'm not running any apps. 3G, WiFi and Bluetooth are turned on though.
How can I resolve this problem?
Mister-B said:
I don't actually suffer from battery life problems like some other owners. My problem is that it takes for ever for my phone to charge. My phone has been charging over USB attached to my computer for 8 hours and is only at 83%. When it's attached to the mains it's pretty much the same story. I'm not running any apps. 3G, WiFi and Bluetooth are turned on though.
How can I resolve this problem?
Click to expand...
Click to collapse
well, if plugged into a computer/usb, itll take much longer to charge. are you using the original usb chord? when plugged into a wall charger, how long does it take?
Current draw is about 700mah on average. Battery size is 2100mah. So it should take 3 hours to charge with the wall charger.
USB is another story. If you charge and surf at the same time it will be consuming battery rather than charging.
The problem seems to occur when I don't use the original USB wall charger. Are not all USB chargers the same? When I use the original charger, I don't seem to have this problem.
If WiFi was left on while charging on a computer USB port, would this effect the charging speed?
I own a Galaxy S2. I have tried it using for navigation many times only to find that the battery discharges fully within 2 hours even if the phone is connected to a car charger. I used to think may be its because my car charger doesn't provide enough current to maintain the charge. But recently I found out the culprit. After around 20 minutes of use, the phone battery starts heating up, and it stops charging. I verified this with CPU-Z. It clearly shows battery overheated, power supply connected and not charging.
I was wondering if S4 also has similar issue. Has anybody used it for more than 2 hours with Google Navigation continuously while connected to car charger?
unni_kmr said:
I own a Galaxy S2. I have tried it using for navigation many times only to find that the battery discharges fully within 2 hours even if the phone is connected to a car charger. I used to think may be its because my car charger doesn't provide enough current to maintain the charge. But recently I found out the culprit. After around 20 minutes of use, the phone battery starts heating up, and it stops charging. I verified this with CPU-Z. It clearly shows battery overheated, power supply connected and not charging.
I was wondering if S4 also has similar issue. Has anybody used it for more than 2 hours with Google Navigation continuously while connected to car charger?
Click to expand...
Click to collapse
The most I have used it for is about an hour and half, and while the phone did heat up, it did continue to keep charging while connected to my in-car charger (just a cheap one). I can't remember whether the charger was able to keep up with the discharge though, I think it did. I was driving in bright sunlight, so I had screen brightness on max throughout that time.
.Astiak said:
The most I have used it for is about an hour and half, and while the phone did heat up, it did continue to keep charging while connected to my in-car charger (just a cheap one). I can't remember whether the charger was able to keep up with the discharge though, I think it did. I was driving in bright sunlight, so I had screen brightness on max throughout that time.
Click to expand...
Click to collapse
I've found that the USB cable can have a big impact on the charging current. I had the same problem with my car charger not keeping the phone charged, even though I was using a 2A charger. When I changed the USB cable I managed to quadruple the charging current (from 300ma to 1200ma) and solved the problem (I measured the charging current using the Galaxy Charging Current Lite app).
HTH
itm said:
I've found that the USB cable can have a big impact on the charging current. I had the same problem with my car charger not keeping the phone charged, even though I was using a 2A charger. When I changed the USB cable I managed to quadruple the charging current (from 300ma to 1200ma) and solved the problem (I measured the charging current using the Galaxy Charging Current Lite app).
HTH
Click to expand...
Click to collapse
In my case, I believe it was not because of the charging current or cable. I was trying with a car charger capable of charging a laptop, using the wall charger and cable which came with the phone. When the mobile stopped charging, I checked in CPU-Z app. The app was clearly showing status as "power supply connected, not charging and battery overheated". If I unplug the USB cable and connect it back, it will start charging again!
To make sure that I didn't miss anything, I will try with the app you suggested.
Just to update: The Galaxy Charging Current Lite doesn't seem to work with my Galaxy S2. It doesn't show any value.
hey guys i bought my niece a 2012 nexus 7 it has the axus charge with different usb cable but it charge so slow
i was wondering if there is a rom with better charging speed
i havent root and is wifi version
What does "so slow" mean? As in, how many minutes to change 10% in charge?
One thing you can do to troubleshoot things is to see how long it takes to charge the tablet when it is completely shut off. It should be pretty obvious that "the ROM" has absolutely nothing to do with that scenario. Wait till the tablet is discharged to about 10%, shut it off, and charge it for 90 minutes. If it is charging normally it will be close to 70% charge when you boot it back up.
If your tablet charges slowly in that case, then there is a problem with the charger, cable, or battery in the tablet - not the ROM. So, you should surely check that out first before you start worrying about software.
A nominal N7 (2012, WiFi) will charge from 5% to 100% in about 150 minutes: 2.5 hours. That's with a STOCK ROM. If you look at the battery capacity, that works out to a minimum 1.73A charging rate. (4.325 Amp-hours / 2.5 hours = 1.73 A). It's actually higher than that because a certain amount of charging current is "lost" to heat generation while charging.
The tab will ALWAYS charge slower than that if it is in use, especially if the screen is on and the owner is doing things like streaming data or playing games. If it is under heavy use, the tablet itself could easily dissipating 1.0 A of current... so in that case the 2.5 hour charging time would be over twice as long: over 5 hours.
The "fast charge" ROMs are not what you are thinking. "fast charge" there means "fast charge under conditions normally restricted to low currents when data transfer is taking place". If you are using a charge-only cable (such as the OEM charger and cable), the tablet should always be able to draw close to 2A of current with ANY ROM - there is no data connection present, and the tablet is not restricted in the current it can draw.
The ROMs don't really throttle the battery charging rate except in that very specific condition: when there is a data connection present. So, worrying about which ROM is installed really only applies to people that want to use a Y-cable and a live USB data connection (tethering or an OTG gadget attached) - for instance in car installs or maybe with data tethering via USB.
good luck
bftb0 said:
What does "so slow" mean? As in, how many minutes to change 10% in charge?
One thing you can do to troubleshoot things is to see how long it takes to charge the tablet when it is completely shut off. It should be pretty obvious that "the ROM" has absolutely nothing to do with that scenario. Wait till the tablet is discharged to about 10%, shut it off, and charge it for 90 minutes. If it is charging normally it will be close to 70% charge when you boot it back up.
If your tablet charges slowly in that case, then there is a problem with the charger, cable, or battery in the tablet - not the ROM. So, you should surely check that out first before you start worrying about software.
A nominal N7 (2012, WiFi) will charge from 5% to 100% in about 150 minutes: 2.5 hours. That's with a STOCK ROM. If you look at the battery capacity, that works out to a minimum 1.73A charging rate. (4.325 Amp-hours / 2.5 hours = 1.73 A). It's actually higher than that because a certain amount of charging current is "lost" to heat generation while charging.
The tab will ALWAYS charge slower than that if it is in use, especially if the screen is on and the owner is doing things like streaming data or playing games. If it is under heavy use, the tablet itself could easily dissipating 1.0 A of current... so in that case the 2.5 hour charging time would be over twice as long: over 5 hours.
The "fast charge" ROMs are not what you are thinking. "fast charge" there means "fast charge under conditions normally restricted to low currents when data transfer is taking place". If you are using a charge-only cable (such as the OEM charger and cable), the tablet should always be able to draw close to 2A of current with ANY ROM - there is no data connection present, and the tablet is not restricted in the current it can draw.
The ROMs don't really throttle the battery charging rate except in that very specific condition: when there is a data connection present. So, worrying about which ROM is installed really only applies to people that want to use a Y-cable and a live USB data connection (tethering or an OTG gadget attached) - for instance in car installs or maybe with data tethering via USB.
good luck
Click to expand...
Click to collapse
thanx man now i get it it won charge fast like the note 3
i was playing fifa 14 and didnt charge at all it was loosing power
mrej201 said:
hey guys i bought my niece a 2012 nexus 7 it has the axus charge with different usb cable but it charge so slow
i was wondering if there is a rom with better charging speed
i havent root and is wifi version
Click to expand...
Click to collapse
Get a better cable. I was using a third party cable on my Nexus 7 for a while and realized it was only charging about 10-15%/hr.. Changed the cable out for a better one and it charges at the normal rate now, 30%/hr or so.
Do check for loose connections for both battery connector and usb ribbon connector (under speakers). I’ve opened the back cover to check after slow charging problems and was solved by opening and clipping back the usb ribbon connector. Charging's back to normal now.
http://androidforums.com/nexus-7-20...esting-while-diagnosing-charging-trouble.html
Lim Wee Huat said:
Do check for loose connections for both battery connector and usb ribbon connector (under speakers). I’ve opened the back cover to check after slow charging problems and was solved by opening and clipping back the usb ribbon connector. Charging's back to normal now.
http://androidforums.com/nexus-7-20...esting-while-diagnosing-charging-trouble.html
Click to expand...
Click to collapse
thanx bro
I have a nexus 7 1st generation, the battery drains when it is plugged in so it doesnt charge, however, it does charge when turned off.
I have tried two different wires, I charge using the wall socket.
I have tried using different sockets but I still experience the same problem.
I haven't rooted it or anything
I've been on trouble shooting forums etc and have installed battery moinot widget, its says Status: discharging AC plugged in
Health: good
Temperature: 27°C
Voltage:3907
Capacity: 2854/4325
Battery flow: -612mA ( -14.15%/hr)
I know people usually ask if there are any apps using a lot of battery but right now 77%= screen, 4%= android system, the other is used up by other apps it only using about 2% each
I dont understand what it is because if it was something to do with the connection it wouldnt charge when off, but it does, just not when turned on
Would any factory reset help?
Any advice????
Mine has done that sporadically. With USB and dock. Usually a reconnect will get the current flowing. There's a thread here somewhere suggesting charging on the 500ma computer usb connecting and reconnecting a few times. I think it's the USB daughter board.
Sent from my Le Pan TC1020 using Tapatalk
OK, can't find original thread. I suspect the battery is too hot and the charge delayed. Then once in deep sleep it never starts the charge. I'm going to set WiFi on while charging, hopeful a sync will wake it to resume charge.
sent by mirrorflash Morse code
claire13524 said:
I have a nexus 7 1st generation, the battery drains when it is plugged in so it doesnt charge, however, it does charge when turned off.
I have tried two different wires, I charge using the wall socket.
I have tried using different sockets but I still experience the same problem.
I haven't rooted it or anything
I've been on trouble shooting forums etc and have installed battery moinot widget, its says Status: discharging AC plugged in
Health: good
Temperature: 27°C
Voltage:3907
Capacity: 2854/4325
Battery flow: -612mA ( -14.15%/hr)
I know people usually ask if there are any apps using a lot of battery but right now 77%= screen, 4%= android system, the other is used up by other apps it only using about 2% each
I dont understand what it is because if it was something to do with the connection it wouldnt charge when off, but it does, just not when turned on
Would any factory reset help?
Any advice????
Click to expand...
Click to collapse
I had the same problem with mine. However, for some reason when i used an HTC charger (with the usb to AC adapter) it was charging faster than losing charge. Once i changed chargers to one with a shorter but thicker cable, i never had the problem again, even with the brightness all the way up.
Hope this helps.
thats the same problem that i got when i first got my nexus 7
what fix it was a different charger and cable