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I'm not sure if this has been noted elsewhere but I couldn't find it if it was.
I ran into the problem yesterday in which my HD2 running WP7 would drain the battery if connected to the PC USB port instead of charging it. This was the first time my phone had done this and restarting the phone and switching USB ports did not result in any difference.
On a whim I decided to look in my device manager and there was an unknown device listed there. I selected it and had is search for and install the drivers and now it listed as USB Composite Device. Once that was done, the phone charged as normal.
jaxjaguar said:
I'm not sure if this has been noted elsewhere but I couldn't find it if it was.
I ran into the problem yesterday in which my HD2 running WP7 would drain the battery if connected to the PC USB port instead of charging it. This was the first time my phone had done this and restarting the phone and switching USB ports did not result in any difference.
On a whim I decided to look in my device manager and there was an unknown device listed there. I selected it and had is search for and install the drivers and now it listed as USB Composite Device. Once that was done, the phone charged as normal.
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Click to collapse
My phone's listed as Windows Phone USB, which i think is cool, but stll not enough!
Charging takes hours...
stealth21 said:
My phone's listed as Windows Phone USB, which i think is cool, but stll not enough!
Charging takes hours...
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Click to collapse
that depends on the charging source.
if you use a laptop you will only be getting 200-300mA of current, a normal PC USB port will give you around 500mA, the wall charger will give you 1A (1000mA)
Now its not as simple as that as the device uses some of that power for working as we cant charge whilst off, so knock 100mA off it if the screen is on, on standby it'll be minimal so forget that.
1A charger should get you charged in ~1.5 hours
PC will double it to ~2.5 hours, some PCs do have 1000mA ports so say ~1.5-2.5 hours)
laptop could be ~4-6 hours (some laptops do have 500mA ports so say ~2.5-6 hours)
note you can get 2A quick chargers (~35min-45min, but i would be very careful with those an can ultimately lead to a shorter life span of the battery
dazza9075 said:
that depends on the charging source.
if you use a laptop you will only be getting 200-300mA of current, a normal PC USB port will give you around 500mA, the wall charger will give you 1A (1000mA)
Now its not as simple as that as the device uses some of that power for working as we cant charge whilst off, so knock 100mA off it if the screen is on, on standby it'll be minimal so forget that.
1A charger should get you charged in ~1.5 hours
PC will double it to ~2.5 hours, some PCs do have 1000mA ports so say ~1.5-2.5 hours)
laptop could be ~4-6 hours (some laptops do have 500mA ports so say ~2.5-6 hours)
note you can get 2A quick chargers (~35min-45min, but i would be very careful with those an can ultimately lead to a shorter life span of the battery
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Click to collapse
Thanks for quick reply, i tried computer it took so long..
Although I'm using wall charger nowadays it takes more then 3-4 hours. Theres something wrong, When i had winmo6.5 the device was fully charged in 2.5 hours...
stealth21 said:
Thanks for quick reply, i tried computer it took so long..
Although I'm using wall charger nowadays it takes more then 3-4 hours. Theres something wrong, When i had winmo6.5 the device was fully charged in 2.5 hours...
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Click to collapse
yeah that doesnt sound right, the battery its self is only 1230mA, the wall charger is 1000mA on standby within WP it should draw any more than 10mA but lets say 100mA on the extreme side, that gives you a net gain of 900mA every hour which is like 1 hour 20min.
I assume its the 1A charger that came with the device? check the adaptor and see what the current output is listed as
according to your figure of 3 hour charge time ( again, assuming from flat) that means its dumping around 400mA in to the battery an hour. That means one of two things
Firstly that your device is using an incredible 600mAh, that would be toasty and is unlikely!
Secondly, the charger isnt putting out 1000mA, more likely 500mA or 300mA
I suppose there is a third option, something gone wrong in the device its self, i cant think why it would tho, try running it near flat, restart it, make a note of the battery level then restarting again (you restart twice because WP on the HD2 has battery reporting issues) hold down the VOL down button on reboot which will take you in to the bootloader.
plug in the charger and leave for half hour, go back to windows and look at battery (remember to set the clock properly again!)
if the charger is 500mA it will have only charged to just less than 1/3
if its 1A it will be just less than 2/3 maybe half
the point of doing it in the bootloader is that you rule out WP and its dodgy drivers and will help to narrow down the problem
Check charge current in Battery tool apps. Battery current - positive figures are charging current.negative discharge.
To get high charging current(more than 200 ma) from power suply(wall or car) usb data lines must be shorted(fast charging mode). On ploperly made power supplies usb data shorted and phone can suck high current(700-800ma normaly not more).
Even if on charger written 1000ma it doesn't mean phone wil take all. what is written on charger - it is max allowed.
zcdg said:
Check charge current in Battery tool apps. Battery current - positive figures are charging current.negative discharge.
To get high charging current(more than 200 ma) from power suply(wall or car) usb data lines must be shorted(fast charging mode). On ploperly made power supplies usb data shorted and phone can suck high current(700-800ma normaly not more).
Even if on charger written 1000ma it doesn't mean phone wil take all. what is written on charger - it is max allowed.
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Click to collapse
Indeed, although from my own tests it draws around 900mA, there is a large number of variables including power fluctuations on a dirty line regulated supplies, state of the battery, etc, its safe to play with estimates I think in this case without overcomplicating things, but the fact remains, on a wall charger that comes with the HD2 it should fully charge in around 1.5 hours unless it is not the same charger or something is wrong with it.
dazza9075 said:
Indeed, although from my own tests it draws around 900mA, there is a large number of variables including power fluctuations on a dirty line regulated supplies, state of the battery, etc, its safe to play with estimates I think in this case without overcomplicating things, but the fact remains, on a wall charger that comes with the HD2 it should fully charge in around 1.5 hours unless it is not the same charger or something is wrong with it.
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Click to collapse
yes, with correct wall or car charger it charges in about 1.5 hours from almost empty to full.
I can't remember if this has been happening before, but when I have the HD2 conncted to a computer it takes forever to charge. Maybe 1 % per 10 or 15 minutes! Charging on the regular charger is so many times faster. Mybe 1 % per minute or so. This can't be right, can it? I have the same problem on my HD2 and my wife's HD2. They both are using the same ROM (ironically it's the Energy Max Sense ROM...). Is it possible that the ROm is the culprit? They both have quite new original batteries.
USB port supplies less than half the "oomph" of the wall charger. USB charging will run about 300mAh while wall charger will supply about 800mAh
Also, older PC power supplies and older USB 1 sockets may provide even less, depending on what other devices are in/on your machine drawing power.
Yes, thanks. I know that. But that shouldn't accord for an at least 10 time slower charge. And I know that they weren't like this before, but I can't remember how long before. And I have no idea if it can be the radio ROM, the regular ROM or what.
I use energy ROM but older 23699 & see no issues on USB charge rate but yours does seem rather long, what status is the device in when USB connected & is screen off !
Also, keep in mind that the rate of charging goes down as the battery level approaches 100%. So maybe u r comparing charging rates measured over different regions of the curve, i.e. observing the rate with usb charging when the battery is around 90% will be drastically different from the reading observed with wall charging when the battery is at 10%.
Sent from my HD2
Mastiff said:
I can't remember if this has been happening before, but when I have the HD2 conncted to a computer it takes forever to charge. Maybe 1 % per 10 or 15 minutes! Charging on the regular charger is so many times faster. Mybe 1 % per minute or so. This can't be right, can it? I have the same problem on my HD2 and my wife's HD2. They both are using the same ROM (ironically it's the Energy Max Sense ROM...). Is it possible that the ROm is the culprit? They both have quite new original batteries.
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Click to collapse
if youre running windows 6.5 the quickest way is to turn the phone off then charge
or get a cheap chinese battery charger 6 dollars and a spare chinese battery extended around 10 bucks with 2400 mah double the juice i got a couple of those i never charge my phone anymore lol
Mister B, I have tried with the phone both on and off. But I really need to keep the phone on because I get a lot of work mail and SMS that I need to keep an eye on. Also I don't think I had problems with earlier versions of Energy, I may have to try to go back and see if it's the ROM.
ASCIIker, no. The problem isn't the final bit of the charge. If I put it in when it's around 30 % it almost won't charge at all. If anything it looks like the phone is getting a better charge when it's close to 100 %.
Casemandan, I have a charger like that you describe, but I do a lot of driving with TomTom, and even though I did change battery on the run yesterday it's not something I would recommend...
Btw I have the same problem in the car, with a combined charger/battery charger cradle that I have put there. The red/orange charging light is on, but it goes slowly down instead of charging. But I'm wondering if that is because the car charger is connected to a mini USB in the cradle, not to the micro USB. I have to try that.
I don't have mine connected for much time via USB to PC but when do & have left on charge rate seems acceptable, could be ROM as I found a few issues with newer builds.
As for car charger the low rate will be down to the power adaptor unit being recognised as USB charge not AC charge.
If the Power adaptor you are using can feed 800mA<>1000mA then modding it by bridging data leads so handset goes to AC charging rate is the way forward. Use tbattery to see what current charge mode is.
You may be able to buy car charger already set for AC charge (have a browse in HD2 accessories forum) but I use an old USB 1000mA Ericsson adaptor I bridged for AC charge mode.
Like you say testing charge direct in car is a good idea as many of the phone/battery charger cradles output pathetic charge current.
Well, it's not the ROM. I tried an original ROM and had the same problems. I need to see if there is something wrong with my cradle. I do have a charger that should do what you describe, but when it's plugged into the cradle in the car it doesn't. I'll try to connect it to the micro USB instead of the mini USB and see if that matters.
I have TPT for 10 days now.
I have usual iisue with USB charging. When used like standard smartphone = put it to charger overnight. Not usable anyway. Charge rate about 5% per hour, which means 20 hours per full charge???
I even consulted it with local technical support. I was adviced to buy docking station with external power adapter .....
So ... I took regulated power supply, made a USB socket connected to it and started to measure
.. and look what I found
When device is switched on, usb power oscilates sligthly under 1000 mA. It is NOT using all available power of 2 Amps of stock power adapter!!!!!
But ... when I power the device off using power button. The current goes down to 300mA for about 5seconds and then raises to full 2 A!
Conclusion? It seems like control issue of the charging ciurcits. What if we can enable full 2A power even when turned on? SW issue?
Is there any chance, how to instruct internal power circuity to use all available power? ADB?
Well I guess that explains the slow charging that people have been reporting. I picked up a dock for my tablet from amazon for about $30 shipped. Now I just put my USB charger in my bag for when I am out and about and dock it when I get home. That being said when I was charging via USB before I had the dock, a full charge seemed to take about 6 hours or so.
As for your question regarding modifying the input charging rate while powered on, I am not sure that can be done via ADB. I am taking a stab in the dark here, but I wouldn't be surprised if the charging rate was hard coded into the power circuit. Which would make some sense so as not to draw to much power if someone wanted to try and charge their tablet while having it plugged into a laptop or USB hub. I am not sure if it has an auto sense capability to determine whether or not it is charging via USB from a port or from the power adapter. I do know when I hook it up to my computer to transfer files it offers me the option to charge via USB, but I think that is a software thing and not hardware. I could be wrong. Maybe if we had access to the board schematics I could figure out. I can read schematics and might be able to figure it out.
Any chance you could get a proper reading via the docking port on the tablet? I would be curious to see if it is always at 2A. I haven't counted the pins but I don't see why you would need more than VCC+, VCC-, GND and maybe a sense line. But I know there are more than 4 pins.
Sent from my ThinkPad Tablet using xda premium
I would say this is a SW issue. Maybe if we had the kernel source code someone could cook up a custom kernel with that control feature tweeked.
Temetka said:
~
Any chance you could get a proper reading via the docking port on the tablet? I would be curious to see if it is always at 2A. I haven't counted the pins but I don't see why you would need more than VCC+, VCC-, GND and maybe a sense line. But I know there are more than 4 pins.
~
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Click to collapse
The best thing to use is a watt meter if anyone wants to pursue this.
My findings indicated that the dock has a similar issue as the USB charger when the TPT is on.
Maximum current allowed at the dock connector was measured at just over 1A . Dock should charge the battery at a maximum rate of just over 1% per minute provided the battery charge level is below 70%. So if you discharge the battery to around 50% and compare charge rates you should see the difference between TPT on/off.
I figured I would share this since I have not found another thread with this info.
The Galaxy Note 10.1 will charge from usb.
I find this interesting because no tablet, at least none I have known, will do this. They all need to be actually plugged into a wall outlet to charge. However, my note 10.1 has charged from around 13% to 32% plugged into USB. Now, mind you , it doesnt charge very fast, but it does charge.
For some this won't matter. In my case, that 3 ft cord doesnt go from the floor outlet to my desk at work too easily, but the usb will plug in very easily and reach where I need it too. At the very least, it will add a little more time to the length of the batter. I work a 10 hour shift, not adding in the hour for lunch, and I can usually made it about 8 hours. So this may get me the extra two hours I need...hopefully.
phoenixbennu said:
I figured I would share this since I have not found another thread with this info.
The Galaxy Note 10.1 will charge from usb.
I find this interesting because no tablet, at least none I have known, will do this. They all need to be actually plugged into a wall outlet to charge. However, my note 10.1 has charged from around 13% to 32% plugged into USB. Now, mind you , it doesnt charge very fast, but it does charge.
For some this won't matter. In my case, that 3 ft cord doesnt go from the floor outlet to my desk at work too easily, but the usb will plug in very easily and reach where I need it too. At the very least, it will add a little more time to the length of the batter. I work a 10 hour shift, not adding in the hour for lunch, and I can usually made it about 8 hours. So this may get me the extra two hours I need...hopefully.
Click to expand...
Click to collapse
Hmm, I think mine claims not to (it puts an X on the battery icon), but I didn't leave it plugged into my computer long enough to see whether it charged or not. I think all tablets can potentially charge via USB port on a PC, it's just that most disable it out of the box but eg. for the Galaxy Tab 10.1 custom kernels could enable charging over USB.
iofthestorm said:
Hmm, I think mine claims not to (it puts an X on the battery icon), but I didn't leave it plugged into my computer long enough to see whether it charged or not. I think all tablets can potentially charge via USB port on a PC, it's just that most disable it out of the box but eg. for the Galaxy Tab 10.1 custom kernels could enable charging over USB.
Click to expand...
Click to collapse
Mine also puts the RED X over the battery icon whether I try to charge it through a PC USB port or other USB charging port other than the Samsung adapter (Goal Zero 150 usb port and Panatech 10000mah external USB battery pack). The tablet shows that it is charging when i view it using GO POWER MASTER app. Watched it for 5 minutes but with WIFI off, it still dropped from 88% to 87%. I am however using the stock kernel.
It charges faster if you have the screen off. The usb gives more or less what you need to keep it running with the screen on.
Skickat från min GT-I9300 via Tapatalk 2
Mine put the red X on the battery icon as well, but still charged. I had to have the screen off.
I had mind plugged into my USB 3.0 port (which should really make a difference) to transfer some files, and then just left it plugged in and it charges. Its definitely a trickle charge, but I am glad to see it does this, as my a500 did not.
When I transferred 40Gb of data to the mSD via MTP (screen off) and called up the batt-graph after disconnection it showed me a fair charging rate. Not stunning but at least a noticeable charge ( from 63% to 82% in three hours).
So it does charge the battery, in spite of the red X?
Yes it does, albeit very slowly.
You guys are misinterpreting the red x. Just got off the phone with Samsung. The x stands for "extra awesome charging". I swear.
Sent from my GT-N8013 using Tapatalk 2
phoenixbennu said:
I figured I would share this since I have not found another thread with this info.
The Galaxy Note 10.1 will charge from usb.
I find this interesting because no tablet, at least none I have known, will do this. They all need to be actually plugged into a wall outlet to charge. However, my note 10.1 has charged from around 13% to 32% plugged into USB. Now, mind you , it doesnt charge very fast, but it does charge.
For some this won't matter. In my case, that 3 ft cord doesnt go from the floor outlet to my desk at work too easily, but the usb will plug in very easily and reach where I need it too. At the very least, it will add a little more time to the length of the batter. I work a 10 hour shift, not adding in the hour for lunch, and I can usually made it about 8 hours. So this may get me the extra two hours I need...hopefully.
Click to expand...
Click to collapse
Interesting, because every tablet I've owned (Tab 10.1 and Nexus 7) behaved like this.
They will charge VERY slowly on USB - and will likely not charge at all if the screen is on due to the total unit power consumption being >500 mA.
Entropy512 said:
Interesting, because every tablet I've owned (Tab 10.1 and Nexus 7) behaved like this.
They will charge VERY slowly on USB - and will likely not charge at all if the screen is on due to the total unit power consumption being >500 mA.
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Click to collapse
Same here. iPads, nook color, Samsung tablets, all say not charging but do trickle charge if you are doing anything to drain it faster than thenusb can supply. It takes around 8 to 10 hours to charge my gt101 through regular USB 2.0.
mitchellvii said:
You guys are misinterpreting the red x. Just got off the phone with Samsung. The x stands for "extra awesome charging". I swear.
Sent from my GT-N8013 using Tapatalk 2
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Click to collapse
Bwahahaha... A friend of mine posted on twitter that Apple should make something that lets iDevices charge each other... Ours actually can because of USB host! I actually lost the usb host adapter for my old galaxy tab so I need to get a new one but I had one for my gs3, and it does charge my tablet. But the reverse is clearly more useful.
Sent from my SCH-I535 using Tapatalk 2
Tested again when attached to Notebook by USB:
Screen on at max. Brightness and working: batt charge stays level
Screen off: batt charges approx. 5% per hour
Tested on GNote charger (1A output)
Screen on : charging very slowly (approx. 3% per hour)
Screen off: charging approx. 8% per hour
Tested on iPad charger:
Slower than original charger although max. Output:
The more items you have attacht to your computers USB the less power it has to allow your tablet to draw for charging.
donec said:
The more items you have attacht to your computers USB the less power it has to allow your tablet to draw for charging.
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Click to collapse
I don't think this is the case. The USB ports provide a set power output, and not variable by available power supply type of output.
phoenixbennu said:
I don't think this is the case. The USB ports provide a set power output, and not variable by available power supply type of output.
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Click to collapse
You are correct they are not variable but they only have a given amount ofpwer available and if you are drawing the max and add another device that needs more power to charge the power will not be available.
donec said:
You are correct they are not variable but they only have a given amount ofpwer available and if you are drawing the max and add another device that needs more power to charge the power will not be available.
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Click to collapse
Of course, everything has a limited power availability, USB ports being no exception, whether having their own psu or bus powered or whatever your setup may be, but unless you are doing something beyond practical use or have a poorly designed setup, than this should not be a problem. I know some systems out there, the mac book pro for example, specific limits USB power output between ports by design (you may even call it variable haha...but by design). However, in a general sense, you should not have a power output issue with simply plugging in for usb charging., even if all other ports are used up as well. So don't daisy chain, or do anything like that. Practical use should be fine. I personally hook my usb charged devices, like my phone, to my monitor at work. It was a few usb ports on the side, and it works great. Also, it keeps me from having to deal with all the annoying security popups that go with plugging it into the actual computer.
In a probably unfunny but still remotely amusing anecdote, I remember the massive work I put my a500 through. I used to have a usb hub attached with 2 1tb portable hard drives, a keyboard, a mouse, my phones, and more all charging directly from USB. Never had trouble with power issues, aside from quicker draining of the battery. lol.
does anyone know if charging is possible when you use an Y adapter on USB-OTG to hook up an external harddrive and a charger at the same time?
cproaudio said:
does anyone know if charging is possible when you use an Y adapter on USB-OTG to hook up an external harddrive and a charger at the same time?
Click to expand...
Click to collapse
Barring any specific device hardware limitations, it is possible to do data transfer and power transfer at the same time using a y cable. Its essentially the same thing as using a usb hub, except you only have two ports instead of 4 or more.
As for actual practical use on the note, I have not tried it out, and I am not aware of any limitations built into software or hardware to prevent it. So, I do not see you having a problem with it.
Almost all tablets can charge through regular USB2 if they're sleeping (or better - powered off).
USB has power limits (USB1.1 is 100mA, USB2.0 is 500mA and USB3 is 2A) BUT these are the 'minimum maximums', if you will. That is, these are the current source *required* for certification. It's entirely permissable for a USB port to provide as much current as it wants - it just can't be limited to *less* than these amounts.
USB 2.0 and later ports are also supposed to implement 'overcurrent' warnings if the device is taking more current than the port can provide..
That's why, for example, some ports can drive a CDROM or external HD drive without a problem - while other ones can't.
The Note 10.1 needs a little over 2A @ 5V to charge at a reasonable rate.
One other note, if you let your battery drain very low, then the lower current of most USB 2 ports won't be enough to charge it even if it's off. The charge current curve isn't linear.
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
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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
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Click to collapse
thanx bro