Database Info

Dead Tornado

So.. here goes my problem..
Got my Qtek 8310 three days ago, and the very same day I got it, decided to upgrade from WM5 to WM6. However, the battery charge meter gave me wrong info about the battery charge percentage, and the phone battery died just after I formatted the BINFS and re-setted the device in TeraTerm.
The device still powered on, after each USB cable re-insert, but died, after 5-10 seconds. After a couple of attempts, the phone didn't turn on at all.
Did some info search on the web and found out, that my battery fell to an critical voltage level. Li-Ion batteries require a certain voltage to even be able to accept a charge.
As I got an non-original battery (Sanyo ST26C) I suppose it is poorly designed and doesn't have good under-voltage protection (I have read about other HTC models (e.g. Wizard) having this problem as well), so the battery dropped below these limits and phone now identifies the battery faulty and doesn't let it charge. This is for consumer safety, because attempting to charge damaged Li-Ion cells can be dangerous, as Lithium is known to be able to catch fire/explode.
So the phone doesn't let to charge the battery in any way (1amp wall charger or USB cable).
Anyways, I tried to jump start the battery (charge with bare wires) to give it initial charge and... it worked. However, there goes my main problem: As soon as I insert the battery which has the initial charge, the phone starts immediately and boots to a bootloader (as there is no OS, formatted BINFS) and the the phone does not charge while in bootloader.
Then, I tried to turn off the phone: Hold down power off button for 5 seconds - phone turned off. But as soon, as I release the button, red light flashes once (as it does everytime, when you try to turn on the phone, it's normal) and then orange LED comes for a second, indicating a charge (as the battery is no longer considered faulty - phone lets it to charge), BUT then phone starts again to the bootloader and it somehow prevents further charge.
So: as soon as I release the power off button, after the phone has shutdown, it starts again, everytime, and soon the battery dies again.
My own thoughts of solving this:
* Get a fully charged battery from a friend, install the windows on the phone, and then charge my own battery (I know noone, who may have HTC Tornado, will be hard to get);
* Buy some standalone dock charger, which can charge batteries directly and charge the battery happily (haven't seen any around yet, so will be really pain in the arse, to get one);
* Charge battery with bare wires for an extended period of time, to give it enough juice to install windows (which I strongly doubt, as battery damage could occur);
Any other ideas? Ideas and comments, from people who know, or had similar experience is more than welcome. Looking forward for answers

Its funny. Reading you I've realized what people tell me about "I make a question and I answer it myself" So... You have the answers my friend. For options 1 and 2, use E-Bay. As a matter of fact, there is an aftermarket charger in ebay that charges your phone and a spare battery and it includes the spare battery when you buy the charger. I believe it runs for under $20.00. For option 3 use some wood cloth pins(those used to hang cloth to dry). I would say with at least 2hrs charge you should get a good 50% charge on your battery, enough to flash your phone.
Edit: Here is an Ebay Search. But, keep searching till you find the one that includes the extra battery. Chances are your battery is no good or won't last you very long.
Good Luck!

Get a new battery man, these li ion batteries, are no joke, especially the fact that they are made in China/Taiwan, I myself had used a tornado battery even till the days when the battery has bloated and cracked the back cover, when a single charge could not even last 4 hours.
Those days, were like having a timebomb in your pocket, ended up I got mysel a new tornado at a price cheaper than a replacement battery.

markanthonypr said:
Its funny. Reading you I've realized what people tell me about "I make a question and I answer it myself" So... You have the answers my friend.
Click to expand...
Click to collapse
Well yes, I have some suggestions, but I am also expecting others to have some, too. And by sharing the knowledge, maybe I could prevent myself to spend more money on this issue
markanthonypr said:
For options 1 and 2, use E-Bay. As a matter of fact, there is an aftermarket charger in ebay that charges your phone and a spare battery and it includes the spare battery when you buy the charger. I believe it runs for under $20.00.
Click to expand...
Click to collapse
The main problem with e-bay is... my country. at least 80% of the items, don't ship to my location.
markanthonypr said:
For option 3 use some wood cloth pins(those used to hang cloth to dry). I would say with at least 2hrs charge you should get a good 50% charge on your battery, enough to flash your phone.
Click to expand...
Click to collapse
Thanks for the suggestion. The main reason why I am in serious doubt about this option, is that standard chargers usually have some sort of regulators and monitors the charge, prevents from overcharging, etc. But on the other side, USB charge output is only 100 mA, so it couldn't be that bad if you think about it
karhoe said:
Get a new battery man, these li ion batteries, are no joke, especially the fact that they are made in China/Taiwan, I myself had used a tornado battery even till the days when the battery has bloated and cracked the back cover, when a single charge could not even last 4 hours.
Those days, were like having a timebomb in your pocket, ended up I got mysel a new tornado at a price cheaper than a replacement battery.
Click to expand...
Click to collapse
Well, the fact, that it is manufactured in China actually says nothing Many companies choose China to manufacture their products because of low costs. And the most of electronics is manufactured in China and other Asian countries.
Anyway, before getting myself an new battery, I would like to try resurrect this one If this won't last long for me - no problem, I will get an new one. But until I'm convinced enough, it's a waste of money, which I don't like doing

And one more thing.. maybe someone knows a way to keep the phone power off?
Because as I said earlier on, it's charging only when it's turned off, and not in the bootloader. And problem is that, as soon as I put the battery, it starts-up the bootloader.

Get a desktop charger perhaps?
Or if you are adventurous enough, mod the USB cable, and charge the battery directly, only if you know what you're doing, and only if it works

karhoe said:
Get a desktop charger perhaps?
Click to expand...
Click to collapse
Well.. thanks for the answer, but we've already discussed this option and now I am asking whether or not, someone knows a way to turn off the phone and keep it turned off (prevent from self startup) while the phone has no OS (got formatted BINFS).
karhoe said:
Or if you are adventurous enough, mod the USB cable, and charge the battery directly, only if you know what you're doing, and only if it works
Click to expand...
Click to collapse
I've already done that, and yes, it works. But I need someone to confirm, if it is safe enough to charge the battery for an hour or two.
Have anyone tried that?

I don't think that it's very safe. But I was having a similar problem, and I just left the phone connected to the power cable, and even though it seemed like it was not charging, it apparantly was.
Or you could just get a new battery. On expansys I saw a new one for ~$20.

nav1 said:
I was having a similar problem, and I just left the phone connected to the power cable, and even though it seemed like it was not charging, it apparantly was.
Click to expand...
Click to collapse
Well..
With a modified USB cable (bare wires), which got power output of 100mA I have charged battery directly for approximately 3 minutes, and the phone turned on, and was operational for 4-5 minutes until the battery died again.
And before that, I've tried leaving it on an mains charger, which got power output of 1A (1000mA, 10 times USB). I left it for a hour or two, although no led was showing up to indicate a charge. The phone didn't event turn on after this 2 hour "charge".
And the reason for this is explained in my first post. Will try to leave it charge over a night, though, expecting for a miracle
nav1 said:
Or you could just get a new battery. On expansys I saw a new one for ~$20.
Click to expand...
Click to collapse
But new batteries usually come empty, so it's no use to me. I have also explained why, on my previous posts.
So before buying an cradle charger, I would like to find out if these budget-friendly solutions will work:
1) Find out how to keep the phone powered down (because it's the only moment, when it truly charges);
2) Find out if it is safe enough to charge battery with bare wires for extended period of time (1-2 hours);

Just came up with another idea. Searched the forums and found a very similar problem to mine:
fritzgerald said:
For some odd reason my wizard likes to say the battery is full when its actually dead and that it's dead when it's really full. Well a few days ago I was reflashing to try and take care of the issue and it died during the middle of flashing. It would only goto the bootloader screen and would not charge. Well I decided I'd post a few pictures of my recovery technique utilizing my wife's phone. Cat5 cable striped at the end and twisted to each of the positive and negative battery terminals and the Blackberry's battery put it so I could use it to power the wizard.
Click to expand...
Click to collapse
So.. I've got a Sony Ericsson w810i, would this technique work? The w810's battery is Li-Polymer, 900mAh 3.6V (although some sources say, that this exact battery is 3.7V..), compared to Li-Ion 1150mAh 3.7V Tornado's battery.
Voltage seems suitable..

Haven't got any answers to my previous posts, so I tried.
The trick worked, Sony ericsson's battery can feed HTC Tornado perfectly. However... got another problem..
Here's how I wired it up. The positive wire takes two contacts and the negative takes another two aswell. The ends of the wires are then connected to the sony ericsson's battery. Phone starts, and boots to a bootloader. Everything's seem to be perfect.
Then I plug in the USB cable into the computer, the other end to the phone. Phone recognizes the cable and puts label "USB" at the bottom of the screen.
However, there's something wrong with the connection.. TeraTerm fails to connect and Update ROM utility fails, too, with an "cannot connect" error..
After that, I have tried using the original battery, with no wires attached, just plugged it in (gave it an initial charge again) and the USB worked without any problems: TeraTerm can connect.
So the problem seems to be in wiring.
I have tried to connect the wires in different random ways (crazy, I know), but only one alternate way did worked. Although, phone did heat-up rapidly at the area, where it says "HTC Innovation" and phone's display showed "USB" even if no USB cable was connected.
So.. looking forward to some thoughts or any knowledge, of why is this happening, wiring schemes, or any other suggestions..

FINALLY! SUCCESS!! I've connected the wires from the sony ericsson's battery to touch only one pin on the phone, instead of two, as shown in the picture. The phone didn't turn on, as I've tried this before.
But then remembered that the same pins charge the original battery, so inserted the battery and VOILA! Phone turned on to the bootloader and the USB circuit wasn't blocked no more! Flashed the phone to WM6.5 now successfully and the original battery is charging, as I write this post )
So, if anyone got HTC smartphone dead, while flashing, let me know, will try to help you out, since I've walked through this hell myself
Thanks goes to karhoe, for an excellent guide for flashing, also dharvey4651 for an excellent guide on installing vista's USB drivers (got new PC, upgraded to vista) and last, but not least - the whole XDA-developers community for helping me out

1A Wall Charger Works!!
I've had the same problem discussed above. I was trying some of my own 6.5 ROMs, which by the way were getting stuck at the initial boot screen itself. Due to some unavoidable reasons and circumstances, the phone freely was left to itself at this exact state, untethered to any power source, for extended periods of time, during which it slept and refused to wake up again, all my pleadings going in vain. And when it did boot, it went into the tricolor screen conveniently and switched off in ten seconds. I turned to the net for help and found that any charger with rating above 1A would help in giving it the required juice. I didn't want to waste any of the 6 USB cables I have.
I got the original charger, which is an 1A charger, after 2-3 hours of searching my room (Hey, Don't be too hard on me! In the end, I got it, right? Actually, I use the PC for charging, and a smaller 550mA one sometimes-- both didn't work this time) and then, when I connected it showed the screen again. But this time, I found that it was capable of running it without the battery being present.
So, all I did was I kept the charger connected to it with the phone switched on in the tricolor mode and with the battery inside. After half an hour, I tethered it to the PC and flashed a proper ROM. And Voila!!! IT WORKED!! It was 2.45 in the morning!!
I guess the power from the 1A charger is enough for the phone to run and charge it too which is not the case in the 550mA one and the USB cable.

rajathvsm said:
I've had the same problem discussed above. I was trying some of my own 6.5 ROMs, which by the way were getting stuck at the initial boot screen itself. Due to some unavoidable reasons and circumstances, the phone freely was left to itself at this exact state, untethered to any power source, for extended periods of time, during which it slept and refused to wake up again, all my pleadings going in vain. And when it did boot, it went into the tricolor screen conveniently and switched off in ten seconds. I turned to the net for help and found that any charger with rating above 1A would help in giving it the required juice. I didn't want to waste any of the 6 USB cables I have.
I got the original charger, which is an 1A charger, after 2-3 hours of searching my room (Hey, Don't be too hard on me! In the end, I got it, right? Actually, I use the PC for charging, and a smaller 550mA one sometimes-- both didn't work this time) and then, when I connected it showed the screen again. But this time, I found that it was capable of running it without the battery being present.
So, all I did was I kept the charger connected to it with the phone switched on in the tricolor mode and with the battery inside. After half an hour, I tethered it to the PC and flashed a proper ROM. And Voila!!! IT WORKED!! It was 2.45 in the morning!!
I guess the power from the 1A charger is enough for the phone to run and charge it too which is not the case in the 550mA one and the USB cable.
Click to expand...
Click to collapse
Glad to hear that it worked for you Unfortunately, it didn't for me (as I only have an after-market charget, not the OEM one, although it is 1A), so I had to search for alternative methods.

<Help> Dock not charging

Tried the following methods=
Cold boot
Switching from PC USB to Asus charger
Switching from other manufacturer's charger to Asus
Freeze the charger(???)
Adaptor charge the tablet in good order, but it doesn't seem to be charging the doc.
The dock is always blinking rapid amber led when plugged in and the adaptor just get really hot.
Guys, any advise? Warranty expired, it gonna hurt my wallet to send in for repair ;(
Sent from my Nexus 7 using xda app-developers app

If you let the dock drain 100% it sometimes encounters problems. If you open up the dock you will see a little switch. Flip it back and forth and it should start charging again

mrevankyle said:
If you let the dock drain 100% it sometimes encounters problems. If you open up the dock you will see a little switch. Flip it back and forth and it should start charging again
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Click to collapse
where exactly is that small switch ??

RIght beside the battery on the charging port side if i remember correctly

mrevankyle said:
RIght beside the battery on the charging port side if i remember correctly
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Click to collapse
Got the same problem as the OP - Dock not charging and even the dock option is greyed out within the Settings - Interface - Launcher option.
My question is - Is there any software command that would simulate the flipping of the switch using ADB etc? Would not want to open the dock as yet..
It works properly when I attach it to the tablet, only problem is that it doesn't charge...Any pointers would be more than welcome!
Am on 4.1.2, CM10 2012 12 08 Unofficial
Thanks!

Try a cold boot, it fixes lots of these problems. Hold the power and vol down buttons till you see 2 icons on the screen, then release the 2 buttons and let it boot. Try it while docked and it should start charging again.

Lethe6 said:
Try a cold boot, it fixes lots of these problems. Hold the power and vol down buttons till you see 2 icons on the screen, then release the 2 buttons and let it boot. Try it while docked and it should start charging again.
Click to expand...
Click to collapse
Yes, already tried that (it says cold booting linux and all..) , I tried it while docked and with the charger in the dock..but still the same orange blinking light..Dual Battery Widget also doesnt detect the dock..though I can type with the keyboard and all that stuff..

Guess you should open it up then, and try to switch trick as I doubt there's an ADB command for a hardware switch inside a "third party device" since it's not part of android but really an extension that probably requires drivers and/or kernel modules outside of stock android. If there is, it's probable it's not documented if it was added by Asus for Asus. While it's opened up inspect the battery for obvious signs of wear/damage. Dual battery widget didn't work for me on some ROMs (can't remember which exactly but only the tablet battery was detected) but recent CM10 should have a separate icon with a dock through the battery icon while docked.
You can try the dumpsys utility from ADB, which prints out battery info so you may find something, but you can't manipulate data at all:
adb shell dumpsys battery
Also, did you try wiping the battery stats in recovery? If you have that option...
And lastly, lots of people are suggesting the freezer trick. To me that would be last resort but it looks like it's working for some people it seems.

Lethe6 said:
....it's probable it's not documented if it was added by Asus for Asus...
...You can try the dumpsys utility from ADB...
Also, did you try wiping the battery stats in recovery? If you have that option...
And lastly, lots of people are suggesting the freezer trick. To me that would be last resort but it looks like it's working for some people it seems.
Click to expand...
Click to collapse
Thanks for your detailed analysis and useful suggestions - just reflashed the CM10 8th Dec UNofficial rom y'day only and then recovered all the apps etc..But your idea of wiping out the battery stats didn't cross my mind! Should be there under advance I guess within recovery..(Have touch based 5.9 or something)
I would let the charger plugged into the dock and then try again the cold boot trick to see if that resolves the issue..Else would see if I have the option of wiping battery stats within recovery..
I am currently on vacation and hence donot want to open up the Dock here, freezer trick while harmless but I fail to understand logically how that would help Nevertheless would try it out if the above doesnt work..
Would report on the updates tomorrow (after 12 hours or so.)

The freezer trick is an oldie but a goldie. I used to do it with old hard disks that had certain problems and it worked in some cases, but usually you had an hour or so to salvage the data then it would die for good...
The logic behind it is that cold contracts the parts while heat expands them. So if it's a bad solder or something alike, the cold can temporarily fix it. But as I said, it would be a last resort for me and I'd triple seal it in ziplock bags to make sure no humidity can get in or out.
Let us know how it works out!

Lethe6 said:
The freezer trick...
..Let us know how it works out!
Click to expand...
Click to collapse
I am actually inclined to open up the keyboard and flip the damn switch now!
Also I did try cold booting (as the tablet had charged to 98%) and also wiping out the battery stats, but no change in situation still.

Opened the keyboard, flipped the switch but still no change..Orange light just keeps on blinking approximately every second..
Am at a loss to understand what could be the problem - the dock and tablet were bought in Sep last year and the dock has hardly been used (probably not for more than 20-30 hours in the last 14 months or so..)
Anyway I havenot closed the keyboard completely, would flip the switch again after sometime and see if that changes the charging behaviour in any way!
Anyone who has had success with dock charging issue after flipping the switch?

Update on previous post - Suspecting that it could be a software issue as well, I flashed an old Megatron Rom (based on CM9), and tested the switch again.
Switch off - Only EeePad's battery is shown
Switch On but no charger - Dock's battery is shown (symbol of battery + Keyboard) BUT with a red exclamatory sign, along with the normal EeePad's battery
Switch On and with Charger - Dock's battery is shown (symbol of battery + Keyboard) with charging sign , along with the normal EeePad's battery
So definitely an improvement as compared to CM10!!
Wondering if I should search for a Stock (Rooted ?) Firmware and flash that..Or probably just a firmware for the dock (does that exist?)

I'm pretty sure there is firmware for the dock (I think you see it in the settings while docked) but I don't think it's available, nor does any rom actually change it they just "use" it. For sure the best thing to try would be stock now with dual battery to make sure it works properly. Easy flasher will get you back to stock, provides root and can install different recoveries for you (there's plenty of others but this one seems easiest and worked best for me).
I'm thinking you're right on both accounts: the switch did work and there's a software issue somehow causing this. I've seen stranger things with custom roms. Glad you're making progress!

Lethe6 said:
.. the best thing to try would be stock now ..Easy flasher .. seems easiest and worked best for me..
Glad you're making progress!
Click to expand...
Click to collapse
Thanks a bunch Lethe6 !! I have downloaded the Easy Flasher (V 0.8.3 Stable) and am downloading the Stock Rom from ASUS WebSite (300MB)..Its a slow connection here, so I would be able to report back by tomorrow only..But I am optimistic that Stock Rom should resolve the issue with the charging!!
Thanks once again for providing the links, I would report back tomorrow on the progress!

UPDATE on prev post - Flashed the latest stock from ASUS Website ..It does show the Dock Battery BUT at 0%
And from what I read here, I seem to have run out of lack as apparently there is a design flaw wherein there is no way a dead battery can be revived!!
(I ran out of warranty in September but as I wasn't using the dock really at that time, I didn't bother to look into the issue at that time..)

That really sucks But it must be a particular model because mine has went to 0% numerous times and I've never had that issue before. Did you try the freezer trick? At this point if it's supposedly completely dead, might as well give it a shot. Also some people suggest plugging it into USB for 5-12 hours, the trickle charge may help getting it going again. If the tablet is not 100% charged the dock won't start to charge either, so try just with the dock then try with both. Also check this out, sometimes strange fixes are the best.
You can probably find a refurbished dock for under 100$ during the holidays online, if you really need it.

Out of curiosity which series dock do you have? Mine is a B70 purchased in UK last September..(Tablet is also having a S/N starting with B70 and SBK v2)..
I tried the other fix as well that you mentioned - that is using a different USB charger, to my surprise without the tablet attached, there was no light on the dock. but if I attached the tablet, then orange light was blinking much quicker! So seems like the dock is quite sensitive wrt the current supplied through the USB cable..(Guess all USB chargers have typically 5V output or something?)
On using the original ASUS USB Charger, light blinks slower (with or without the tablet attached)..Have left the charger plugged in again ..in the faint hope that some trickle charge is able to revive the dock's battery!
And no, haven't tried the freezer trick as yet
Would probably contact ASUS UK once I am back in UK..

My "mobile dock" version (you can see it in settings -> about tablet -> mobiledock) is EP101-0213 and my tablet is SBKv2 C30 purchased in Canada 6 months ago.
There's a nice article explaining voltages and amps in relation with phones (which applies to almost any mobile device), however from what I read, the Asus wall charger has a different pinout for USB and feeds the power differently. I'm sure you can find the exact specs here somewhere, I saw people showing how to make your own charger.
But assuming you're right and it's sensitive to the current (Bad design? Cheap parts?) then it's possible that simply replacing the wall charger would solve it. I bought a spare one to leave at work for 8$ on ebay and it works nicely so far!
Just out of curiosity.. did you/can you try to connect it to another power source? Like a different house? I once had a problem with a charger that there was too much noise on the electrical system and the charger couldn't keep a decent current output because of the variations, so the phone would say it was charging but it wasn't; tested later at several locations and it was working. I know it's a long shot but hey at this point...

Thanks! Would have a look at the link you provided..Meanwhile I also came across this link which kind of indicates that using a 12V 1A charger fixes the dead battery! Would probably order the relevant stuff from ebay and see how it pans out! Just crossing my fingers at this point really and have also left the charger plugged in to see if it does trickle some charger into the dock!
After flashing the latest stock rom (instead of CM9 or CM10), I also have same version for my dock ending in 213..
Finally apparently it seems that USB Debugging off/on also seems to affect the dock's battery as per the various other charging related threads on XDA..
Thanks for all your suggestions - you keep me motivated to try out various things and I am learning new things as well !
PS : Forgot to mention that I had already tried a different power outlet (i.e. in UK) and now another one in a totally diff country!

Can't charge after updating to JB

Hello,
This is the first time I am using Android so please understand that I know basically nothing about it.
So I received a refurbished note 10.1 (software 4.0.4) with about 50% of battery left. I played with it like 3 hours and then updated to 4.1.1 (or 4.1.2), battery went down to like 10% so I plugged the charger in and kept playing. After further 30mins I realised my battery still goes down (8%). I had a quick look in Google and many people are saying that after updating to JB tablet takes very long time to charge or doesn't charge at all. I thought mine will charge slowly so I left it overnight plugged in. I woke up with 7%...
I tried charging it with a USB cable connected to a TV, in the first hour it charged to 8 and after that (about 3h) it stayed the same.
So the question is: Is it the charger, software or is it just a faulty tablet?
What I would like to try is to downgrade it back to 4.0.4 but I am not sure how to do that (or if it is safe) with such low battery level. Is it possible to downgrade when tablet is off?
Thank you

edmund5 said:
Hello,
This is the first time I am using Android so please understand that I know basically nothing about it.
So I received a refurbished note 10.1 (software 4.0.4) with about 50% of battery left. I played with it like 3 hours and then updated to 4.1.1 (or 4.1.2), battery went down to like 10% so I plugged the charger in and kept playing. After further 30mins I realised my battery still goes down (8%). I had a quick look in Google and many people are saying that after updating to JB tablet takes very long time to charge or doesn't charge at all. I thought mine will charge slowly so I left it overnight plugged in. I woke up with 7%...
I tried charging it with a USB cable connected to a TV, in the first hour it charged to 8 and after that (about 3h) it stayed the same.
So the question is: Is it the charger, software or is it just a faulty tablet?
What I would like to try is to downgrade it back to 4.0.4 but I am not sure how to do that (or if it is safe) with such low battery level. Is it possible to downgrade when tablet is off?
Thank you
Click to expand...
Click to collapse
Factory reset or reflash the firmware JB you flashed .
But i would return to the seller has you have no evidence JB is the problem as you only had the tablet 3 hours .
Flash any firmware via Odin min requirements 30% battery to be safe .
jje
jje

edmund5 said:
Hello,
This is the first time I am using Android so please understand that I know basically nothing about it.
So I received a refurbished note 10.1 (software 4.0.4) with about 50% of battery left. I played with it like 3 hours and then updated to 4.1.1 (or 4.1.2), battery went down to like 10% so I plugged the charger in and kept playing. After further 30mins I realised my battery still goes down (8%). I had a quick look in Google and many people are saying that after updating to JB tablet takes very long time to charge or doesn't charge at all. I thought mine will charge slowly so I left it overnight plugged in. I woke up with 7%...
I tried charging it with a USB cable connected to a TV, in the first hour it charged to 8 and after that (about 3h) it stayed the same.
So the question is: Is it the charger, software or is it just a faulty tablet?
What I would like to try is to downgrade it back to 4.0.4 but I am not sure how to do that (or if it is safe) with such low battery level. Is it possible to downgrade when tablet is off?
Thank you
Click to expand...
Click to collapse
Have you tried charging from an actual power outlet I don't believe that you can charge them via tv, pc or any other device only via an actual power outlet.
As far as roling it back to ics I believe you would have to flash it but don't take my advice on that one, maybe someone else could advise?
Also no I would upgrade or down grade firmware without a fully charged battery.
I found that mine was charging worse after jb update I actually factory reset it and its a tiny bit better, I still find though that if I want to charge it fast its best to turn it off and let it charge, I also noticed that the biggest culprit for draining the battery atleast on my device is Skype just having it running in the background drains it heaps.

JJEgan said:
Factory reset or reflash the firmware JB you flashed .
But i would return to the seller has you have no evidence JB is the problem as you only had the tablet 3 hours .
Flash any firmware via Odin min requirements 30% battery to be safe .
jje
jje
Click to expand...
Click to collapse
Yeah.. but what if I can't charge it?
Can I factory reset (I believe that's via recovery mode?) when battery is almost dead?
JTG81 said:
Have you tried charging from an actual power outlet I don't believe that you can charge them via tv, pc or any other device only via an actual power outlet.
As far as roling it back to ics I believe you would have to flash it but don't take my advice on that one, maybe someone else could advise?
Also no I would upgrade or down grade firmware without a fully charged battery.
I found that mine was charging worse after jb update I actually factory reset it and its a tiny bit better, I still find though that if I want to charge it fast its best to turn it off and let it charge, I also noticed that the biggest culprit for draining the battery atleast on my device is Skype just having it running in the background drains it heaps.
Click to expand...
Click to collapse
I left it charging the whole night using the included charger (It looks like an original one) and as I said it only dropped by 1% (tablet was off the whole process)
From what I know it does charge through TV's and stuff but it just is a lot slower.
And I have no apps running, wifi off, gps off - everything off. RAM cleared
// After about 3 hours of charging through a TV it went up by 1%...
I left it charging through a TV because if a normal AC didn't help I thought it may be something to do with the charger.

edmund5 said:
Yeah.. but what if I can't charge it?
Can I factory reset (I believe that's via recovery mode?) when battery is almost dead?
I left it charging the whole night using the included charger (It looks like an original one) and as I said it only dropped by 1% (tablet was off the whole process)
From what I know it does charge through TV's and stuff but it just is a lot slower.
And I have no apps running, wifi off, gps off - everything off. RAM cleared
// After about 3 hours of charging through a TV it went up by 1%...
I left it charging through a TV because if a normal AC didn't help I thought it may be something to do with the charger.
Click to expand...
Click to collapse
Factory reset is in settings under personal heading its the backup/reset tab obviously make sure you back up your stuff first or you will loose it, this won't role it back to ics but might help. Also I have never found that any of my android devices charge via another Device only wall outlet they do maintain the power level there at but don't really charge.
Do you have another ac adapter I youncould use to test with try a different ac adapter if possible.

charging cable likely cause
I have had very bad luck with factor Samsung cables.. I would Use a different usb cable and wall plug usb brick.. make sure its output is equal to or above the original Samsung charger .
This is likely why the device was returned to begin with. As most of us know refurb devices are usually just open box customer returns. Often are just factory reset and resold .

JTG81 said:
Factory reset is in settings under personal heading its the backup/reset tab obviously make sure you back up your stuff first or you will loose it, this won't role it back to ics but might help. Also I have never found that any of my android devices charge via another Device only wall outlet they do maintain the power level there at but don't really charge.
Do you have another ac adapter I youncould use to test with try a different ac adapter if possible.
Click to expand...
Click to collapse
oh, I forgot to mention, I have tried this because I thought it will go back to ics.
I dont have any other adapters, as I said this is the first time Im working with Android.
But, my friend has Galaxy S3, will that work?
erica_renee said:
I have had very bad luck with factor Samsung cables.. I would Use a different usb cable and wall plug usb brick.. make sure its output is equal to or above the original Samsung charger .
This is likely why the device was returned to begin with. As most of us know refurb devices are usually just open box customer returns. Often are just factory reset and resold .
Click to expand...
Click to collapse
Shall I try a different charger then?

edmund5 said:
oh, I forgot to mention, I have tried this because I thought it will go back to ics.
I dont have any other adapters, as I said this is the first time Im working with Android.
But, my friend has Galaxy S3, will that work?
Click to expand...
Click to collapse
Shall I try a different charger then?
Click to expand...
Click to collapse
It might work check the voltage to see if its the same and use your usb cable, they use mini usb I believe. Thats the other thing the usb cable that you using might be stuffed. The cable on galaxy tab 7 looks 100% but it doesnt work at all, as erica_renee said samsung chargers aren't the greatest.
I use a Belkin charger much stronger than samsung original

From what I've read, one review says that there is no way to use a S3 charger. + it has 1A
Apparently note uses different pin configurations..
I have no idea what to do now... :<
What about finding a galaxy tab charger?

edmund5 said:
From what I've read, one review says that there is no way to use a S3 charger. + it has 1A
Apparently note uses different pin configurations..
I have no idea what to do now... :<
What about finding a galaxy tab charger?
Click to expand...
Click to collapse
Galaxy tab charger will work I have and I just use it for both without any problems, you could go to tandy electronics or radio shack depending on what country your in they might have somethingcheap that might work or the might be able to test the one your got to see if its actually working

JTG81 said:
Galaxy tab charger will work I have and I just use it for both without any problems, you could go to tandy electronics or radio shack depending on what country your in they might have somethingcheap that might work or the might be able to test the one your got to see if its actually working
Click to expand...
Click to collapse
Right, before I get one, at the moment Im trying to use iPhone charger with the standard samsung cable. I showed a red cross (what I would expect it to show). I then tried to hold the volume up while plugging it in (Ive read on one forum that it helps, not sure what it does but worth trying) and it jumped up by 1% - no red cross now... I have no idea what Im doing or why no red cross is visible.. ehh
//edit:
Guys.. this is working!
Another 1% in 15 mins.. It may not be much but believe me, Ive been waiting for that 1% for a long time
I'll give an update soon
//
Further 15-20 mins and it increased by 2%. Well, yay! I guess

edmund5 said:
Right, before I get one, at the moment Im trying to use iPhone charger with the standard samsung cable. I showed a red cross (what I would expect it to show). I then tried to hold the volume up while plugging it in (Ive read on one forum that it helps, not sure what it does but worth trying) and it jumped up by 1% - no red cross now... I have no idea what Im doing or why no red cross is visible.. ehh
//edit:
Guys.. this is working!
Another 1% in 15 mins.. It may not be much but believe me, Ive been waiting for that 1% for a long time
I'll give an update soon
//
Further 15-20 mins and it increased by 2%. Well, yay! I guess
Click to expand...
Click to collapse
Not good where did you get it, does it have warranty make em fix it and give you another charger

Hi all,
last night my n8000 stop charging. ..
I even tried the different chargers and also tried to charge thru pc...
When I connect with charger the beep sound come but nothing more and cross sign appears on battery icon.. and worst of all my n8000 not even recognized by pc even...
Any idea ?
EDIT : changed the cable and everything returns to normal

Yes, return under warranty... This is not right. It sounds like the usb connector might have a problem...

[Q] Tablet doesn't charge, dock does - what to replace?

I've been enjoying my TF300 since the month it was released, but in the past few months the battery stats have become less and less accurate. I was watching YouTube videos on it while it was docked and charging yesterday when it suddenly died, and I haven't been able to get it to boot since. Sometimes it will start to boot, but die half way through the boot animation, which implies that the battery isn't charging.
When I plug the charger directly into the tablet, it flashes orange twice and then does nothing. When I plug the charger into the dock, that shows green - so I assume the dock is fully charged. When I plug the tablet into the dock, it flashes red twice again.
The logical assumption from this is that my TF300 has stopped accepting or holding a charge. My question is, which part do you think I should try and replace first? I understand that the dock connector has separate pins for 5V and 15V charging, so maybe that's been bent or broken somehow...or the battery itself could be worn out...or the motherboard could have developed a fault. Has anyone had a similar experience to this? I don't want to buy a new tablet as there is absolutely nothing wrong with my beloved Transformer other than this!
I'm going to leave it plugged directly into a standard PC USB port for several hours tomorrow while i'm at work, to see if it will trickle charge that way. That would imply the charger is at fault, despite the green light from the dock when it's plugged in.

sort of same here
My thoughts are that the one battery is no longer seen by the tablet and the other is getting too much of a workout as a result.
We have possibly just lasted beyond it's expected lifetime - which is kind of dissappointing. I don't understand exactly, but we might troubleshoot this still.What rom or Firmware are you using? I am on straight CM11 with no other modifications. I am using the tablet docked al th time and th rom "sees" the two batteries but dies at about 50% of the one without touching the other. I'm pretty sure that it really only is using the dock battery and never seems to go to the tablet battery anymore. Wish I could fix it - will try to use it without the dock and see what happens.

It was running KatKiss 5.0.0 - I kept reminding myself to go and download the latest update but never got around to it.
After leaving it plugged into a standard 800mA charger all night and all day, it booted for about 20 seconds and then died again before it reached the lockscreen. It seems that the battery is either charging unusably slowly or not at all. I may have to start hunting for a new convertible!

jonty-comp said:
It was running KatKiss 5.0.0 - I kept reminding myself to go and download the latest update but never got around to it.
After leaving it plugged into a standard 800mA charger all night and all day, it booted for about 20 seconds and then died again before it reached the lockscreen. It seems that the battery is either charging unusably slowly or not at all. I may have to start hunting for a new convertible!
Click to expand...
Click to collapse
Well mine is working fine disconnected from the dock - so it sees the Tablet battery and uses it now; I will use it until it needs charging and then try again - by attaching the dock and charging etc. Will yours work if just plugged in? - like a laptop with an old battery, does it still work but you are tied now to the power supply / charging cable? I have installed the latest "homebrew" Omni now to just get a new start on things and will continue to just use up the battery and see what happens next. My preference is to have vanilla CM but it seems the tablet battery was invisible. I hope by re-setting things and having a new Rom in place will give me a clean slate.

Sadly no, it doesn't run even when permanently tethered to the power supply. I think the battery has to report a minimum state of charge before it's allowed to turn on, and that's where it's failing in my case.

Batteries are back
I wish that I could tell you how - but I can't - the batteries are back to full functionality. I will tell what I have done and this might possibly help. I installed Omnirom with Lollipop and it worked but was very slow. Then I installed CM 11 back (then CM 12, then CM 11 again all with the appropriate GApps & SuperSU etc.) and it seemed to put things back in order. I did also install a battery calibration app which just deleted a file tracking the battery(s). Some where in there the batteries starting working properly - this involved more than a few re-boots and re-installs (dirty and clean). In all this mess lies a possible solution or maybe it was when I slammed it shut in frustration - this could all be due to a loose wire/solder joint too. The battery is following the "normal" process now of first draining the tablet battery to ~ 80-90%, switching out to the dock battery, then switching back to the tablet when the dock is drained fully.

@kjwaugh
I can't recharge my battery and I have CM-11-20150112.
My little led never turn on orange light.
My question for you is: Does your led turn on when you plug in the USB cable ?
I'm afraid I have broken some analog circuit inside the tablet or, I hope, only the cable.
Please let me know.

Galaxy S5 Quit Taking a Charge

I'm trying to troubleshoot what might by wrong with my S5. I woke up the other morning and my phone was completely dead. It was plugged in, but no LED was on and the phone was not responding.
I've tried he various troubleshooting that I've seen around the internetz, such as:
removing the battery / discharging with power for 1 minute...plug back in and try again
use a different charger / cable
clean out the charging port (I used my air compressor to blow out any dust that might be in there)
I feel like I've exhausted all I know how to do. I do have another S5 coming in a couple of days, so I'm hoping to use that to see if it's either:
a problem with the battery
a problem with the charging port
something else?
My guess is that if the new battery comes in and I put it in my old phone, that will help me tell if it's the charging port or not, correct? My assumption is that if everything else is fine, then my old phone should power on.
I am a little nervous that it's something else though; I measured the voltage out of my battery and it was registering nothing the other day. When I plugged it into the phone and allowed it to charge (even though there was no indicator and the phone would not turn on) I measured the voltage again and it was registering ~2.8V.
Anyway, thanks in advance for anyone here that can offer any other guidance as to what I can look into to troubleshoot what the problem might be.

I've verified that another battery allows my phone to boot, so my guess is that it's the charging port.
How hairy are these to swap out? Is it a realistic repair?

skankwilsonite said:
I've verified that another battery allows my phone to boot, so my guess is that it's the charging port.
How hairy are these to swap out? Is it a realistic repair?
Click to expand...
Click to collapse
ive cracked an S5 apart, and getting to the charge port isnt so bad if you can get the back plastic cover off, but you might have to remove the screen too. The S5 is waaaay harder to get apart than the early notes

You can get a wireless charging receiver or an external battery charger to charge you battery instead. I charge mine wireless as much as possible to help save the charging port for when I actually need it.