Database Users

Observation: Overheating AC Adapters

I like many people was having issues where the AC adapter would randomly stop charging my tablet. Someones it would start working again soon after and sometimes almost an entire day would go by before it started working again.
Tried the freezer trick with no results. Was going to send it back to Asus when I noticed 2 things.
1. The adapter was very not every time it stopped charging.. hotter than it usually gets when functioning correctly.
2. It only ever stops charging when i'm using a usb 3.0 extension cable.
To test this i stopped using the extension able for about 2 weeks and the adapter functioned properly the entire time. Then last night I reconnected the extension cable and within 5 minutes of of being plugged in charging stopped and the adapter was extremely hot. This obviously leads me to believe that the extension cable is in some way effecting the adapters voltage or something and causing it to malfunction. So I'm curious as to how many of the others who having issues are also using extension cables.

Not the voltage the current the more current it has to push the hotter its going to get and the chargers for these are not designed for extensions they where designed to be small and charge the tf even then there at there limit
Sent from my tf101 using xda premium 1.54Ghz

I also was having trouble with over heating and have been using an 3.0 extension cable. I will stop using it and report back.
hshoem1

its a design flaw with the ac addapters and its one of the reasons that the cable that ships with the transformer is so short

I was just using the cable as is with no extension and it died on my twice. I now have it rigged up to charge from my PC's PSU and only use the adapter when I'm not at my house.

My charger melted my damn usb cable. Thats how hot it got..
I wasnt using the extension cable at the time.
The adaptor would always warm up, which i read was normal. A few days ago, however, i felt some heat on the cable itself.When i reached to the connector, i noticed it had literally melted the rubber casing off the wire.
Im in the process of sending it back today

Just had my second charger die on me! I was charging my Dock and Tablet during class from 2:50-4:10 and when I unplugged it the charger was pretty hot. I went back home and connected the TF to my rigged up PSU charger and then went to class at 6:10 and plugged in the charger and unsurprisingly it wouldn't charge!
Sent from my Transformer TF101 using xda premium

Ive heard reports of people solving these problems by swapping round the mains pins ( I guess only in countries that use 2 pin outlets, UK have 3 )

I am sure this will sound nuts but, put the wall charger in a plastic bag and put it in the freezer for a few hours. Please do not forget the plastic bag. There is a thermal heat fuse inside the brick that needs to be reset. If it is still working the cold will make it reconnect and bring the brick back to working order.
You should make a DIY charger by following "DevCake" thread on DIY AC and DC chargers for the TF.
Hope this helps.
hshoem1

I just do not understand why we would have to go out of our way for their crappy idea of a charger. I understand the idea of not allowing aftermarket chargers because they want the money for the chargers but i mean if you do that then at least make something worth having besides giving us a heater...does this remind anyone of the rrod( red ring of death) for the xbox... to much of a hurry to send out their product they didnt really test EVERY aspect of their device...this makes me sad..and then need to send it back and what not taking up more of our time then not being able to use the tablet because your chargers going back... i wish customer service was better....that is all

just a quick pop here.
but i have found that if you charge the dock and tab separately there are no problems with the adapter. and besides charging while the tab is docked into the keyboard is kinda a waste as its charging the keyboard dock, and at the same time its discharging and trying to charge the tab at the same time. hence causing the strain on the adapter.
besides charging both at once will just kill the keyboard dock in the long run

regP said:
I like many people was having issues where the AC adapter would randomly stop charging my tablet. Someones it would start working again soon after and sometimes almost an entire day would go by before it started working again.
Tried the freezer trick with no results. Was going to send it back to Asus when I noticed 2 things.
1. The adapter was very not every time it stopped charging.. hotter than it usually gets when functioning correctly.
2. It only ever stops charging when i'm using a usb 3.0 extension cable.
To test this i stopped using the extension able for about 2 weeks and the adapter functioned properly the entire time. Then last night I reconnected the extension cable and within 5 minutes of of being plugged in charging stopped and the adapter was extremely hot. This obviously leads me to believe that the extension cable is in some way effecting the adapters voltage or something and causing it to malfunction. So I'm curious as to how many of the others who having issues are also using extension cables.
Click to expand...
Click to collapse
Mine doesn't speed charge my Transformer even without the extension cable. Maybe I'll do some testing with that though and check the heat, since the damn thing doesn't work anymore anyways. Though I might not get any results because of that
---------- Post added at 01:47 AM ---------- Previous post was at 01:46 AM ----------
reaperzero said:
just a quick pop here.
but i have found that if you charge the dock and tab separately there are no problems with the adapter. and besides charging while the tab is docked into the keyboard is kinda a waste as its charging the keyboard dock, and at the same time its discharging and trying to charge the tab at the same time. hence causing the strain on the adapter.
besides charging both at once will just kill the keyboard dock in the long run
Click to expand...
Click to collapse
There are many problems with the charger, many different problems.
I barely use my dock, so I have only been charging my TF standalone. Still stopped working though late last week.

Hmmm, issues here as well...
Charger stopped working at times and then start working again... Now it's not working and sticks with that plan. Pluggin in the charger with the TF turned off makes it boot so something IS happening, it doesn't charge though.
Luckily I have another charger (no original asus but using another adapter + usb-cablethingie) so I can atleast charge it, but still. Was thinking of buying another asus adapter (the travelpack) but really doubting it now if it's a general issue.
Will try the freezer trick anyway and some other stuff... Quite annoying though (for an otherwise excellent product).

i thought the accessories that comes with the TF are all covered under a one year warranty?
and the problem with the adapters suddenly dying is probably the capacitors in the charger or the stepdown transformer in it anyone had a chance to open one yet?

reaperzero said:
just a quick pop here.
but i have found that if you charge the dock and tab separately there are no problems with the adapter.
Click to expand...
Click to collapse
An Asus UK tech support guy actually told me not to charge both the tablet and dock at the same time. Pretty poor if you ask me. They just went silent when I pushed the matter.
They have compromised the design in their desire to make a fashionably tiny charger.

dagrim1 said:
Hmmm, issues here as well...
Charger stopped working at times and then start working again... Now it's not working and sticks with that plan. Pluggin in the charger with the TF turned off makes it boot so something IS happening, it doesn't charge though.
Luckily I have another charger (no original asus but using another adapter + usb-cablethingie) so I can atleast charge it, but still. Was thinking of buying another asus adapter (the travelpack) but really doubting it now if it's a general issue.
Will try the freezer trick anyway and some other stuff... Quite annoying though (for an otherwise excellent product).
Click to expand...
Click to collapse
Actually it is charging, but not with the voltage it requires for the "quick charge". Mine does the same thing. If you turn off the screen or turn off the TF and leave it plugged in, it charges at ~3%/hour. Not very useful if you're a heavy user but better than nothing until you get a new charger.

I may be really lucky: the only time I've ever had a failure to charge, has been fixed by taking off the plug and snapping it back.
Sent from my Transformer TF101 using Tapatalk

tekkitan said:
Actually it is charging, but not with the voltage it requires for the "quick charge". Mine does the same thing. If you turn off the screen or turn off the TF and leave it plugged in, it charges at ~3%/hour. Not very useful if you're a heavy user but better than nothing until you get a new charger.
Click to expand...
Click to collapse
Now you mention this, it indeed does... slow but it does charge. Damnit, luckily I have another charger but this annoys the crap out of me.

dagrim1 said:
Now you mention this, it indeed does... slow but it does charge. Damnit, luckily I have another charger but this annoys the crap out of me.
Click to expand...
Click to collapse
Oh yeah me too
I'm going to get another charger tomorrow when I go pick up a joystick for Battlefield 3
Then I'll contact Asus I guess and get it RMA'ed. Going to try and get some free shipping out of them. Sometimes I am successful sometimes not haha

Spidey01 said:
I may be really lucky: the only time I've ever had a failure to charge, has been fixed by taking off the plug and snapping it back.
Sent from my Transformer TF101 using Tapatalk
Click to expand...
Click to collapse
I get the same, snap off the plug convertor and back on again and back in business again!

Cable Test

My transformer died... and now it won't turn on. The battery was low, so it was probably that... but I thought I charged it.
So I now think my cable is no good. the charger is for sure fine.
Does anyone know what pins to test on my transformer cable to check for voltage? it's either the cable or the transformer port itself that's broken.
before dying, the usb transfer worked. but it wouldn't charge...?
anyone know what pins could cause that?
jcarrz1

hmmm now it's doing this, which i've never seen before...
no i didn't change the bootloader. has anyone else ever seen this? http://i.imgur.com/6XvQF.jpg

Dead battery sign man, charge it. I never really hear about the cables going bad, the chargers go bad all the time though
Sent from my SAMSUNG-SGH-I997 using XDA App

Put the charger in a plastic bag and throw it in your freezer for an hour. Take it out and check to see if it works then. It probably will.
Sent from my Transformer TF101 using Tapatalk

jcarrz1 said:
My transformer died... and now it won't turn on. The battery was low, so it was probably that... but I thought I charged it.
So I now think my cable is no good. the charger is for sure fine.
Does anyone know what pins to test on my transformer cable to check for voltage? it's either the cable or the transformer port itself that's broken.
before dying, the usb transfer worked. but it wouldn't charge...?
anyone know what pins could cause that?
jcarrz1
Click to expand...
Click to collapse
Try to trickle charge off computer and see if it is the block. If it is then put in the freezer like Gary said. But my cable stopped working to transfer data so I had too buy a new one. So Maybe it is the cable?
Sent from my Transformer TF101 using Tapatalk

I also find that sometimes the charger goes "dumb" and you have to physically unplug the block from the outlet or surge protector and plug it back in for it to start charging again. Have you tried this? See if you can get it to charge by doing this, otherwise I second testing the USB cable portion only by connecting it to your PC and having it charge through USB although this is very slow and will take a long time. It also won't charge if you're using the tablet since USB doesn't supply enough power, it might also not charge if the tablet is on at all I believe. Just make sure it's off ad leave it on USB overnight.

I think my friend's just had the same exact problem since last week. It just suddenly stopped charging. My friend though his transformer died.
The cable won't charge but if connected to a PC, it will recognize the tablet. It will not trickle charge. I am going to RMA the cable.

Do you have a USB extension cable in series with the TF cable? The charger needs to see a gnd on pin 7 of the USB connector. If it doesn't it will only charge at 5V and it takes days to charge with the TF off. If no extension cable, plug in to a powered computer and leave TF sit for 10-20 hrs with TF off. It will charge slowly, but bring battery level back high enough that the TF charger will not think it is shorted and shut down

Thanks everyone for the help. It trickle charged, and is now at 96%.
i'll keep everyone updated.
jcarrz1

Are u charging into dock or tablet?
Sent from my GT-I9100 using XDA App

jcarrz1 said:
Thanks everyone for the help. It trickle charged, and is now at 96%.
i'll keep everyone updated.
jcarrz1
Click to expand...
Click to collapse
So did the freezer trick work ?
Sent from my Nexus S

Pipo Max M1 charging issues maybe fried

Apologies if I don’t have the right forum lads,
I bought a Pipo Max M1 tablet about 3 months ago. I loved it , a very good tablet.
I bought a second one for my nephew as a Xmas present.
Before I gave it to him I charged it using my own charger a 5V, 2.5mA charger.
Then I took it to him in Greece.
Now when I went to Greece I never took my charger with me, I assume my nephews charger would do just fine.
When both tablets were discharged I used my newphews charger. This charger was a 12V, 1.5mA charger totally different from the one which came with my tablet.
When I used the 12V, 1.5mA the tablets showed both 100% charge in 2-3 minutes and then both discharged in less than 1 minute, clearly something wrong with that charger. Both tablets never charged again and where completely drained.
Now when I came back to the UK and used my charger (which was working from the start) , my tablet will not charge, it will not turn on and the tablet will get really hot when the jack plug is located when I hook it up to the power supply.
Is it possible the tablet is fried because of the wrong charger that came with the second tablet?
Could it be a matter of taking it to a technician and fixing it?
Any ideas guys?
Thanks in advance and looking forward to your reply

I have the same problem with you. They sent me the wrong charger (9V, 2.5A). The tablet was dead after 3 minutes. Now i'm waiting to receive the right charger.
Try to reset your tablet from the small hole in the back side. otherwise, you can try this http://www.slatedroid.com/topic/38865-dead-pipo/page__st__20__p__471674#entry471674

panospc said:
I have the same problem with you. They sent me the wrong charger (9V, 2.5A). The tablet was dead after 3 minutes. Now i'm waiting to receive the right charger.
Try to reset your tablet from the small hole in the back side. otherwise, you can try this http://www.slatedroid.com/topic/38865-dead-pipo/page__st__20__p__471674#entry471674
Click to expand...
Click to collapse
Panospc I have tried the reset button quite a few times but the batteries are completely drained!
Also I tried the method outlined in your link , although i had to cut the red cable and reconnect it but nothing happened.
My worry is that the tablet now overheats where the power supply plugs in.
Did your tablet overheat when plugged into the power supply without charging or turning on? Does it work now?
Thanks for your help by the way

mtdgr said:
Did your tablet overheat when plugged into the power supply without charging or turning on? Does it work now?
Click to expand...
Click to collapse
I have only the 9V 2.5A charger right now, with this charger, both tablet and charger was cold all the time after 4 hours of charging. The tablet is not turning on. When I get the 5V, 2.5A charger I will inform you.
If you have a multimeter, try to measure the voltage of the battery, maybe the voltage is higher or lower than normal.

panospc said:
I have only the 9V 2.5A charger right now, with this charger, both tablet and charger was cold all the time after 4 hours of charging. The tablet is not turning on. When I get the 5V, 2.5A charger I will inform you.
If you have a multimeter, try to measure the voltage of the battery, maybe the voltage is higher or lower than normal.
Click to expand...
Click to collapse
Yes I had the same issue when I was trying to get different adapters to work with the tablet.
I have ordered two seperate adapters from ebay both at 5V,2000 mA which the seller described specifically for the M1. I will post them to Greece and hopefully they will work.
Regarding my tablet as I am no expert, is it possible you think my tablet was fried?Can it come back to life?
A highest voltage adapter than 5V (the 12 V that I used) , do you think it burned the unit?
Thanks again ( PS: I think you are Greek?)

mtdgr said:
Thanks again ( PS: I think you are Greek?)
Click to expand...
Click to collapse
Yes, PM me if you want, it would be easier for me to talk in Greek.

panospc said:
Yes, PM me if you want, it would be easier for me to talk in Greek.
Click to expand...
Click to collapse
Will PM you mate cheers
PS: I just got feedback from a technician and he said the unit is dead. I am starting to give up hope! shame!

maybe this suggestion will be work but i am not for sure.
i will take no reponsibilities of damages!
1. try to change battery.
2. unsoldered the battery from tablet and try to to relive with the correct charger ( maybe cut the cable of charger and connect the right pins to relive the battery)
3. connect tablet with the correct charger without battery to see if your table still lives.
good luck

KindsKoPP said:
maybe this suggestion will be work but i am not for sure.
i will take no reponsibilities of damages!
1. try to change battery.
2. unsoldered the battery from tablet and try to to relive with the correct charger ( maybe cut the cable of charger and connect the right pins to relive the battery)
3. connect tablet with the correct charger without battery to see if your table still lives.
good luck
Click to expand...
Click to collapse
Thanks for the advise mate
1. try to change battery.
no idea where to get a compatible replacement , if you can advise thats great
2. unsoldered the battery from tablet and try to to relive with the correct charger ( maybe cut the cable of charger and connect the right pins to relive the battery)
are you saying straight connection of the two battery cables to the power supply? will this not damage the battery even further? my charger is a 5V and the battery on top it says 3.7 V?
3. connect tablet with the correct charger without battery to see if your table still lives.
tried it no luck!

I got a 5V, 2A charger from ebay and my tablet works fine now.
I guess that the tablet has a circuit before the battery that prevents charging if the voltage is higher than 5v. So I think that this circuit was fried from the 12V charger and the current doesn't reach the battery and other parts of the tablet. You have to find a way to connect the tablet to an external charged battery with the same voltage to see if the tablet is alive, I think most mobile phones have a 3.7V battery also.

panospc said:
I got a 5V, 2A charger from ebay and my tablet works fine now.
I guess that the tablet has a circuit before the battery that prevents charging if the voltage is higher than 5v. So I think that this circuit was fried from the 12V charger and the current doesn't reach the battery and other parts of the tablet. You have to find a way to connect the tablet to an external charged battery with the same voltage to see if the tablet is alive, I think most mobile phones have a 3.7V battery also.
Click to expand...
Click to collapse
panos good to know your unit is working fine!
there are three cables when I open the tablet
1 red
1 black
1 grey
what's this grey cable doing? According to your advise, should I connect the red and black cables to an external 3.7V battery?
I read in a couple of forums that I can jump start the battery...how is this possible? any instructions/procedure?

mtdgr said:
what's this grey cable doing?
Click to expand...
Click to collapse
I think the gray cable is for WiFi antenna.
mtdgr said:
According to your advise, should I connect the red and black cables to an external 3.7V battery?
Click to expand...
Click to collapse
Yes, Make sure you connect it with the correct polarity, red wire is positive and black wire is negative.

Thank you Panos
I will give it a try and will let you know!and fingers crossed!
Ps: if you hear in the news about a house exploding in newcastle that would be me messing up the battery connection!!
Sent from my GT-I9300 using xda app-developers app

Hi guys I've got the same problem. I got my PIPO m1, but it didn't switch on with or without charger. I disassembled device and charched battery straight. So, after 8 hours of charching it has just 3.25 volt. And if I connect charger to the unit, voltage on its motherboard is 0.5 volt (battery is desoldered at this moment). It can't be the problem of charger, cause I used several ones (5V, 2.5A).
And! The main point! Stock charger was from PIPO m2 so it has 9V Unfortunately, I noticed it after my first charching tryings.
For now I've got a brick. Have you got any ideas what i can do to reanimate it?? ( Thanks!

SpookyXDA said:
Hi guys I've got the same problem. I got my PIPO m1, but it didn't switch on with or without charger. I disassembled device and charched battery straight. So, after 8 hours of charching it has just 3.25 volt. And if I connect charger to the unit, voltage on its motherboard is 0.5 volt (battery is desoldered at this moment). It can't be the problem of charger, cause I used several ones (5V, 2.5A).
And! The main point! Stock charger was from PIPO m2 so it has 9V Unfortunately, I noticed it after my first charching tryings.
For now I've got a brick. Have you got any ideas what i can do to reanimate it?? ( Thanks!
Click to expand...
Click to collapse
SpookyXDA I will follow panos advise today and try to connect the tablet straight to an external 3.7v battery.
Also I will try and find a 3.7v charger and connect the battery straight to that charger and see how it goes!
I have the feeling the circuit board , like panos said above, was fried at a point due to the 12V (in my case and I think the same for you since you used a 9V). If anyone is here has good imagination and creativity on how to overcome and bypass the fried portion on the circuit that would be great!
i can upload a couple of photos if that helps!

I will wait for your results!

SpookyXDA said:
I will wait for your results!
Click to expand...
Click to collapse
Iam afraid none of the things i tried works...i need to find replacement parts if this is going to work..i think a small section of the circuit board if fried.
When the rablet is plugged into the power supply it gets very warm which means electeicity goes through but i doesnt reach the battery
Any idea where to get replacement parts guys??
Sent from my GT-I9300 using xda app-developers app

Okay, i still got a couple of ideas to reanimate device. If everything goes well, I'll write about it here.

SpookyXDA said:
Okay, i still got a couple of ideas to reanimate device. If everything goes well, I'll write about it here.
Click to expand...
Click to collapse
Let me know how it goes mate
Sent from my GT-I9300 using xda app-developers app

If it is impossible to fix, I am interested to buy it because I'm looking for some spare parts.

[Q] S4 only charges when plugged in to my computer

My phone only goes into charging mode when I plug it in to my computer. Anyone have this problem?

tawalla said:
My phone only goes into charging mode when I plug it in to my computer. Anyone have this problem?
Click to expand...
Click to collapse
Have not had this problem myself. Try another USB charger? Just about anything that's 500mA will work (albeit not nearly as fast as the 2.0 amp charger that came with your phone).
I suspect your charger.

Aou said:
Have not had this problem myself. Try another USB charger? Just about anything that's 500mA will work (albeit not nearly as fast as the 2.0 amp charger that came with your phone).
I suspect your charger.
Click to expand...
Click to collapse
It was the cable. I really didn't suspect it would be that since I have barely used it and I've only had it for two weeks. Thanks!

tawalla said:
It was the cable. I really didn't suspect it would be that since I have barely used it and I've only had it for two weeks. Thanks!
Click to expand...
Click to collapse
Good to hear it was a simple solution. You might check with the place you purchased it from to see if they will provide a new cable. I guess we can just be glad you didn't find out about the cable during the middle of an Odin flash...

Aou said:
Good to hear it was a simple solution. You might check with the place you purchased it from to see if they will provide a new cable. I guess we can just be glad you didn't find out about the cable during the middle of an Odin flash...
Click to expand...
Click to collapse
No kidding. That would hurt a little

I am now having this problem after my phone got wet. No AC or DC chargers will work but the phone will always charge from a computer or even the USB interface of a car.
Even if I can get an AC or DC charger to be recognized, the phone will show as charging but the battery will continue to decline.
It is making no sense to me though I assume getting the phone wet partially fried something.

Yeah the voltage is increased to charge you battery when on AC power, at the kernel level. USB voltage is lower. So i'd say surely fried, and will no doubt stop working sooner or later.
I know that on my s2 I had an issue where it would say its charging and when I woke up in the morning no charge at all. The pin/row of pins or bar if you will would bend down and not make good contact. I used a tooth pick to pry up on it every time it did that.

Jnewell05 said:
Yeah the voltage is increased to charge you battery when on AC power, at the kernel level. USB voltage is lower. So i'd say surely fried, and will no doubt stop working sooner or later.
I know that on my s2 I had an issue where it would say its charging and when I woke up in the morning no charge at all. The pin/row of pins or bar if you will would bend down and not make good contact. I used a tooth pick to pry up on it every time it did that.
Click to expand...
Click to collapse
Thanks. I didn't realize that the charging port was removable on the S4 so I swapped that out and all is fine now. :good:

Ummm... No its not the voltage. It is the ID pin. The voltage stays the same. The only actual difference is the milliamp mAH output of the charger. A normal USB plug has 500mA our charger has 2000. How the phone tells the difference? The 2 data pins inside he charger are shorted together. The voltage always stays the same.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

[Q] charging problem

Hello, I bought tegra note 7 tab couple of months ago. It was working fine but recently im facing problem in charging it. The tab does not recognise its original charger and does not charge with the charger. Tried a lot but cant understand why? Somebody help plz

irfanalik97 said:
Hello, I bought tegra note 7 tab couple of months ago. It was working fine but recently im facing problem in charging it. The tab does not recognise its original charger and does not charge with the charger. Tried a lot but cant understand why? Somebody help plz
Click to expand...
Click to collapse
The TN7 has unfortunately been known to have wonky USB ports, so if you're having issues with it then you might want to contact the manufacturer and see about getting a replacement.

I had the same problem and I was able to fix it. Turn off the device, take a needle and try to narrow the USB port, GENTLY AND SLOWLY, try to make the hole to be tighter. I hope it helps. Tegra note is ****y stuff...

How?
rochspioch said:
I had the same problem and I was able to fix it. Turn off the device, take a needle and try to narrow the USB port, GENTLY AND SLOWLY, try to make the hole to be tighter. I hope it helps. Tegra note is ****y stuff...
Click to expand...
Click to collapse
Hey there my usb port, like many others has also gone bust. You mentioned trying to narrow the usb port, what do you mean by this? My tab has be useless for the past month since curries refused to repair it saying it was my fault. I guess its all down to me somehow fixing it any help would be appreciated. Thanks

Have you tried holding down the power button for around 30secs. My battery got drained completely and it didn't seem to be charging, even after a few hours using different chargers. After holding down the power button down for 30 seconds. Then releasing the button. Then pressing again. It came alive.
I may have had a different problem but hope it works for you.

charging problems...the port maybe?
Just bought a refurbished evga tn7 from ebay and it was charged 84% so cool. I played on it for a while bout maybe an hour or so. I left it to charge that night and it didn't charge very fast. Ever since it will only charge with the wall outlet with another cable or the one that came with it. Takes about 6 hours or so to charge even 40%. It also discharges very quickly about a percent a minute or so. It came with the 4.4.2 update. I love this tablet but I can hardly use it because of this. Please help!

Abdur Desai said:
Hey there my usb port, like many others has also gone bust. You mentioned trying to narrow the usb port, what do you mean by this? My tab has be useless for the past month since curries refused to repair it saying it was my fault. I guess its all down to me somehow fixing it any help would be appreciated. Thanks
Click to expand...
Click to collapse
hya - its not hard but you need some nerve, it is relatively easy to wire a QI wireless receiver direct to the battery then fit a charger into a suitable case.
I've done four of these now using fintie slate 7 extreme cases (ebay US) and QI elements from ebay UK. cost about 25 quid or so.
short term or as an alternative you can strip a usb cable or get a micro usb extension cable and wire that to the battery instead so you can charge it up using a smart USB charger. it is possible to wire into the charging circuit so it registers if you are carefull and solder to the board side of the USB otherwise the QI is probably a better option as the charger will switch off when it decides the battery has been charged minimising any possible fire risk from overcharging,
it is also possible to get a phone/computer repair shop to fit a new usb socket as the boards aren't available for some daft reason - they are listed on alibaba but not available.
the only issue is not having a working usb port but as long as you don't want to root the device it doesn't seem to be needed.
---------- Post added at 07:01 PM ---------- Previous post was at 06:55 PM ----------
Squee777 said:
Just bought a refurbished evga tn7 from ebay and it was charged 84% so cool. I played on it for a while bout maybe an hour or so. I left it to charge that night and it didn't charge very fast. Ever since it will only charge with the wall outlet with another cable or the one that came with it. Takes about 6 hours or so to charge even 40%. It also discharges very quickly about a percent a minute or so. It came with the 4.4.2 update. I love this tablet but I can hardly use it because of this. Please help!
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my wireless mod charges slower than it should as its only rated to 1A but not that slow - Ideally you need a 2A charger for tablets min 1A for decent charging, most phone chargers are 500-750mA.
otherwise turn the tablet off and all the power goes to charging.