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Anyone having issues with your touch screen when you are using it while it's chArging? Just wondering if i have a faulty device or are there others with the same problem
Sent from my HTC One X using xda premium
No my device does not have this issue when charging. I think this issue has something to do with the charger.
That's a grounding problem, had it with my SGSII try a different cable.
The sensation had an issue of touchscreen problems while charging. i went through 3 phones. The cause is the same cause as the wifi errors that people are having with the HOX. Bad connection from unibody(sensation) to board.. If we added aluminum foil or solder (just like the HOX wifi issue) it would fix the problem. On the sensation the problem got really bad to where you couldnt unlock the phone with the lockring. grounding issue. I hope the HOX isnt having that same issue and you just have a bum phone or better yet a bum cord or charger. let us know if its either
yeah happened alot on my s2, was due to usb cable or something
but works fine when im charging
It was the grounding issue, does this damage the phone? I have a wall outlet with USB ports so it might emit too much power
Sent from my HTC One X using xda premium
slojko said:
It was the grounding issue, does this damage the phone? I have a wall outlet with USB ports so it might emit too much power
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
Every time this has happened it has been because of what the USB cable was plugged in to and not the cable itself. Try the charger it came with in a regular plug. If it doesn't work better then it is a phone problem.
This happens to me too. Charging from the laptop with an eBay (chinese) cable causes the touchscreen to be unresponsive.
Here's how to test: Open the Notes and draw a few lines very fast.
Here's the results:
USB Charging
No USB Charging
Here is a video of it happening to me on my skyrocket. It was because of the charger. Try a different cable, then a different wall adapter.
http://www.youtube.com/watch?v=x__jdlGXyjk
It is because of the charger...it's always recommended to use the charger that came with the phone eventhough they give us a tiny a$$ USB cable.
Sent from my HTC One XL using Tapatalk 2
Yes, I have an issue - when the phone gets to 90%+ while charging, the screen becomes very unresponsive. The drags don't drag - instead the touches are registered as taps.
You can get an app like MultiTouch Test - and you will see, it's very clear to see when this happens.
My first One X device did not have this issue, so it's something specific to my current unit. Doesn't bother me much, since it only happens at 90%+ charge, while plugged in...
neocryte said:
My first One X device did not have this issue, so it's something specific to my current unit. Doesn't bother me much, since it only happens at 90%+ charge, while plugged in...
Click to expand...
Click to collapse
To me it doesn't happen all the time, sometimes it happens, sometimes it doesn't. Unplugging the cable and plugging it back in seems to temporarily fix the problem, if I leave it charging for a couple more minutes, I think the problem will come back, but again, unplugging/plugging it back, solves it temporarily. It's weird...
Oh, and all this to say that I observed this behavior while charging around 65%, not 90%. And I've only observed this while charging with AC power with the original cable and charger. The problem did not present itself (yet) while charging through USB.
Touchscreen While Charging
Nazgulled said:
To me it doesn't happen all the time, sometimes it happens, sometimes it doesn't. Unplugging the cable and plugging it back in seems to temporarily fix the problem, if I leave it charging for a couple more minutes, I think the problem will come back, but again, unplugging/plugging it back, solves it temporarily. It's weird...
Oh, and all this to say that I observed this behavior while charging around 65%, not 90%. And I've only observed this while charging with AC power with the original cable and charger. The problem did not present itself (yet) while charging through USB.
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Click to collapse
I just had this happen with the stock charger from my old HTC One using it on my HTC One X. Along with touchscreen problems it got VERY hot located as you are looking at the camera side it got hot on the top right side near the camera. Dunno what that could be. Both chargers are rated at the same voltage and amperage, I dont get it
jmdwyer
jmdwyer said:
I just had this happen with the stock charger from my old HTC One using it on my HTC One X. Along with touchscreen problems it got VERY hot located as you are looking at the camera side it got hot on the top right side near the camera. Dunno what that could be. Both chargers are rated at the same voltage and amperage, I dont get it
jmdwyer
Click to expand...
Click to collapse
It's caused by electrical noise. The voltage supplied from your mains outlet is alternating current (typically 50/60hz in frequency). a usb charger has to do two things; firstly step down the voltage (110v/230v/240v down to 5v) and secondly rectify the alternating current into direct current (positive and negative). how it does this is by using a transformer which employs an iron core surrounded by copper windings, this generates a lot of rf (radio) which travels down the cables to the device as well as broadcasting a short distance through the air, a decent charger will use shielding as well as a few other pieces of circuitry which will neutralize the rf given off. In order to rectify the voltage the charger will use a variety of diodes and capitors, in a cheap Chinese charger they will typically use as little as 2 and possibly a generic chemical capacitor (similar to a small battery) these degrade over time and can get quite hot, fat and eventually burst - when you hear about chargers exploding or setting on fire it's usually because the capitors aren't up to the job. a Chinese charger may have all the quality control and certification stamps but most of them are forged, if you buy a charger for less than $10 this is what your likely to end up with. the outputted voltage may appear 5v on a multimeter but they are a very dirty output and can spike from 3v to 7v or even more the load on the charger increases. The dirty output interferes with the mechanism used on touch screen devices which also employ a type of capacitance to register where you are pressing on the screen. A decent charger will use solid state capitors and which should last a lifetime.
if the smartphone miss behaves whilst charging 90% of the time it's because of a faulty charging device (or one employing poor components). a decent charger may cost more $20 but they are significantly safer for both you and the device.
The problem with mains sockets with built in usb usually comes down to shielding, they will either have none or be earthed (which might sound like a good idea but in practise a lot of domestic devices will create leakage to earth causing more noise - alot of studio equipment will have a separate earth). These may not be as dangerous as cheap Chinese chargers but still undesirable.
If a original or good quality charger isn't available one of the best sources for charging a phone will actually be a desktop pc with a usb3 port. The whole pc is insulated in a nice metal case and there are a plefora of high quality components to create a stable clean power supply (a cpu voltage tolerance is usually measured to 2 decimal places of a volt which is pretty good).
Ditch the rubbish cheap chargers, you honestly get what you pay for and they aren't good for the long term health of the phone. If it hums or makes a high pitch noise whilst plugged in your playing with fire - literally. they aren't bothered if your phone dies in 6 months or bursts into flames so long as they get the $5 x 100,000 people who buy them (these things literally cost pennies for them to put together, even though the case might look the business inside they are nasty and as cheap as)
Sent from my HTC One XL using Tapatalk
Very insightful. The worst part is that I have two original HTC chargers and they both emit the high pitched noise.
Sent from my Evita
timmaaa said:
Very insightful. The worst part is that I have two original HTC chargers and they both emit the high pitched noise.
Sent from my Evita
Click to expand...
Click to collapse
Some of the very small chargers might whistle a little, its called coil noise and isn't as bad as capacitors about to pop. The iron core hasn't been sufficiently dampened or glued into the case so it resonates when the ac passes through it, the pitch may change depending on the voltage (whether its a 230v or 110v power supply). It isn't unsafe but HTC should be doing a better job at checking the new chargers, over time most chargers will develop coil noise as glue tends to melt or degrade.
Very insightful video, you'll never buy a cheap charger again
https://www.youtube.com/watch?v=wi-b9k-0KfE&feature=youtube_gdata_player
The gist being the cheap chargers could very well set on fire and the USB could go live at mains voltage with no circuit protection, death traps spring to mind. Be careful what you buy.
Sent from my K701HBC using Tapatalk
Usually, when I charge my phone, it charges pretty quickly, despite the output of amperes; however, when I charge my phone using an outlet nearest to my bed, the charging takes considerably longer, even with a 1 ampere output. (I usually use .7). Also, when I use the phone during charging, it even loses battery... like the percentage goes down. Do some outlets in households have a lower output of energy? Anyone have any ideas?
What rom are you on? Some roms have a fast charge mode. Open Terminal and type "ffc" without the quotes.
Sent from my SCH-I535 using xda app-developers app
ahlexkim said:
Do some outlets in households have a lower output of energy?
Click to expand...
Click to collapse
No. Most household circuits have a circuit breaker with 15 amps of capacity. More than enough. However, the outlet itself or the wiring on the back of the outlet might have issues. Does your charger fit snugly in the receptacle, or is it loose? If it's loose, you are probably getting an intermittent charge. A good outlet should require a little bit of pressure to plug something into it. If your charger just slides in easily, that could be causing your problem.
Good luck.
have you tried different chargers in the outlet. some chargers appear to the phone to be a usb port (and enable a slower charging mode).
Sent from my SCH-I535 using xda premium
i have slow charging too )=
i dont want to download A custom rom ... I dont want to break my phone ...
Ive seen threads for almost all the wireless chargers except this one, so ive decided to create one to unite all the information.
Ive just ordered it on amazon for 50€.
What is your experience with it guys? Cant wait to recieve it.
Sent from my Nexus 4 using xda app-developers app
I have one here and it works fine, charges my phone with no problem and temperatures never go above 36c. The only two issues I have is firstly the Nexus 4 slides around on this thing like there is a layer of Teflon between the phone and charger. I heartily recommend LEAVING the protective film that the Maxell comes with ON the charger that stops the phone slipping.
Secondly forget about using daydream with the charger, in my experience daydream uses up too much power to be useful with wireless charging. The battery charges at snail pace and the phone heats up to over 45c with daydream enabled. I like the Maxell and I like wireless charging my first choice would be the Nexus Orb if it was available, but the Maxell does a good a job as any.
Thanks for the advice. Will keep maxell plastic on. Wish they could deliver it faster. Will take a month
Sent from my Nexus 4 using xda app-developers app
Just got one of these from eBay for £42. Seems to charge fine with the N4 the S line TPC case on.
My only, albeit minor, issue with it is the bright blue LED which illuminates while charging. This is easily resolved by making sure the N4 covers it or stick a bit of dark tape on top.
Sent from my Nexus 7 using xda premium
I just picked a Maxell Air Voltage charger up from Ebay here in the UK, it is a very nice bit of kit I must say and works great, the only downside is that the charging range isnt too good, I was expecting at least 6mm so that I could charge it whilst it was in my flip case, it wont charge through the flip case and it wont charge through any case that is metal or has a foil liner this of course is fairly obvious.
i am sure some of the thinner plastic half cases and gel cases it will be fine, I think that the Nillkin Fashion Shape Flip Leather Case is also OK with it so I will pick one of those up with it.
I tested the effective range with UK 2 x 1p pieces stacked on top of each other which is 3.0 mm thick in total, so if your case it over 3mm thick then it wont work without taking the phone out of the case, something to think about if you are going to get this charger.
I wouldnt hang on to get the orb charger, thats a long way off IMHO, the Maxell air voltage is a great unit, is cheap and will work with other QI devices, well worth getting it.
Sounds good so far. I've ordered mine off Amazon after hesitating because of the price.. Taking ages to arrive during this holiday season. Looking forward to it.
Had mine for around 2 weeks now, works perfectly with my tpu case on.
Did originally have daydream turned on and it was a little slow but now its off it charges great.
Well worth the money. If they were a little cheaper i'd buy another!
hi,
does it use 110 or 220 voltage?
I also have the Maxell charger of Ebay and it charges through the Nillkin hard case with no issues at all which was a deal breaker for me if it couldn't.
I agree with the comment to leave Daydream off as it seems to charge the phone better..
Sent from my Nexus 4 using xda premium
Just got mine. It got up to 98%, does yours get to 100%?
Sent from my Nexus 4 using xda app-developers app
Mine gets up to 100% although not the first time that I charged it for some reason...
Sent from my Nexus 4 using xda premium
ianm said:
Just got one of these from eBay for £42. Seems to charge fine with the N4 the S line TPC case on.
My only, albeit minor, issue with it is the bright blue LED which illuminates while charging. This is easily resolved by making sure the N4 covers it or stick a bit of dark tape on top.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Cheers mate, I was a bit worried about charging through my S-Line case. I've just ordered one from play. I have a desktop stand, but sometimes the connection doesn't fit in properly.
Got my nillkin case for my n4 which is superb and can confirm the Maxwell does charge through it as the other poster mentioned so it isn't a one off, if the case was a little thicker it won't do it though so be warned
Sent from my Nexus 4 using xda app-developers app
rttnpig] said:
Just got mine. It got up to 98%, does yours get to 100%?
Click to expand...
Click to collapse
Mine is getting stuck at 89%. Then it goes in to a state of limbo where it disconnects, uses up a bit of charge, reconnects, gets back to 89% disconnects, etc etc.
Anyone else? Defective unit?
Also, has anyone else suffered severe battery life deterioration after using this? It may well just be coincidence but about 3 days after first using it my battery life has fallen off a cliff. The Android Kernal OS is suddenly showing up at over 30% usage on the stock battery data page, whereas before it was under 10%.
Working fine with mine no problems. But I find when it charges to 100% it waits until it drops to 95% before recharging again. This is fine as I understand that qi charging doesn't allow for trickle charging, so it's either full power or no power. I wouldn't say it degrades the battery life but rather it screws up the battery stats. To fix this I just plug the usb charger once a week or so.
I think the capacity reading gets messed a bit as due to the on/off charging after reaching full charge, since unlike trickle charging where the battery's voltage is kept constant, the voltage is always raising or falling. Depending on when you take your phone away with you in relation to its current charge state you might get a slightly lower capacity for that particular charge.
Sent from my Nexus 7 using Tapatalk HD
Makaijin said:
Working fine with mine no problems. But I find when it charges to 100% it waits until it drops to 95% before recharging again. This is fine as I understand that qi charging doesn't allow for trickle charging, so it's either full power or no power. I wouldn't say it degrades the battery life but rather it screws up the battery stats. To fix this I just plug the usb charger once a week or so.
I think the capacity reading gets messed a bit as due to the on/off charging after reaching full charge, since unlike trickle charging where the battery's voltage is kept constant, the voltage is always raising or falling. Depending on when you take your phone away with you in relation to its current charge state you might get a slightly lower capacity for that particular charge.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
What im going to do to solve this is buy a electricity temporizator and set it to 3 h so it stops once those hours are done. I always charge mobile at the same hour.
Enviado desde mi Nexus 4 usando Tapatalk 2
Makaijin said:
Working fine with mine no problems. But I find when it charges to 100% it waits until it drops to 95% before recharging again. This is fine as I understand that qi charging doesn't allow for trickle charging, so it's either full power or no power. I wouldn't say it degrades the battery life but rather it screws up the battery stats. To fix this I just plug the usb charger once a week or so.
I think the capacity reading gets messed a bit as due to the on/off charging after reaching full charge, since unlike trickle charging where the battery's voltage is kept constant, the voltage is always raising or falling. Depending on when you take your phone away with you in relation to its current charge state you might get a slightly lower capacity for that particular charge.
Sent from my Nexus 7 using Tapatalk HD
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Click to collapse
Trickle charging is horrible for lithium ion/poly batteries. Unplug from AC charger as soon as you can. LiOn batteries don't like to be at full peak 4.2v for long. It's actually better that many of these Qi chargers are only charging to 89 or 95% of capacity by the wireless charges. It's better for the long life of the battery. Charge them often too. Don't let it go down to 10% or 5%. Put them on the charger when your phone is down to 50% and take them off the charger when they get to 90%. It's easy to do with a wireless charger.
Lakino said:
Trickle charging is horrible for lithium ion/poly batteries. Unplug from AC charger as soon as you can. LiOn batteries don't like to be at full peak 4.2v for long. It's actually better that many of these Qi chargers are only charging to 89 or 95% of capacity by the wireless charges. It's better for the long life of the battery. Charge them often too. Don't let it go down to 10% or 5%. Put them on the charger when your phone is down to 50% and take them off the charger when they get to 90%. It's easy to do with a wireless charger.
Click to expand...
Click to collapse
Source.
Cuz all that contradicts lithium theory.
Sent from my Nexus 4 using xda premium
ptesmoke said:
Source.
Cuz all that contradicts lithium theory.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Batteryuniversity.com
Lakino said:
Trickle charging is horrible for lithium ion/poly batteries. Unplug from AC charger as soon as you can. LiOn batteries don't like to be at full peak 4.2v for long. It's actually better that many of these Qi chargers are only charging to 89 or 95% of capacity by the wireless charges. It's better for the long life of the battery. Charge them often too. Don't let it go down to 10% or 5%. Put them on the charger when your phone is down to 50% and take them off the charger when they get to 90%. It's easy to do with a wireless charger.
Click to expand...
Click to collapse
I'm actually aware that constant trickle charging at full charge isn't ideal for long term health of the battery. Which is why I mentioned I only plug the wired usb charger once a week. I only plug it in for about 30 mins so the voltage stabilises as to help the phone more accurately display its charge % state better. Obviously it's all subjective as I've yet to actually perform any tests to see if it's ture or not.
On the subject of long term battery health, trickle charging on wired may not be ideal, but nor is wireless charging due to heat it produces. During wireless charging, according to my battery stats widget the phone reaches 39°C, while wired usb it never goes above 22°C (room temp. basically). The good thing about wireless charging is the heat drops back down when the battery is full and the qi charger is no longer sending any current. But when the charge drops back down to 95 % it restarts charging again, and the heat returns.
So, which is more harmful to the battery, heat or constant trickle charging? In either cases it's still a good practice to remove the phone from the charger (both wired or wireless) once it's reached full charge.
Sent from my Nexus 7 using Tapatalk HD
Out of the blue I noticed my S3 was charging very slowly, it even was losing a charge while it was plugged in while I was using it. I figure it had something to do with my custom ROM so I reflash, still same outcome. The battery was still holding a good charge, so I figured it was something else. I then went out and bought a new charger, which came with a micro usb cord to see if that helped. Plugged in the new charger while using my old micro usb cord, still same outcome. Then used the new micro usb cord and old charger, charging went back to normal, problem solved! I would of never thought that the cord would malfunction from day to day use after such a short lifespan. Moral of the story, check your cords if you experience the same problem, it could save you some time and money!
I bought some cheap ones off Amazon. They won't charge the s3 but will my touchpad. But my s3 charger won't charge my touchpad. Stuff is weird at times.
Glad it was an easy fix.
Sent from my SCH-I535 using xda app-developers app
Must have been charging in USB mode.
Sent from my SCH-I535 using xda app-developers app
I believe it, using my old galaxy nexus cord for my s3 charges extremely slow (like 200 mAh) for some reason. I switched to a different cord and now it's all good, I have no clue why but that's how it is.
Sent from my SCH-I535 using Tapatalk 2
That's weird mine started doing the same thing just in the past few days. I have to unplug and plug it back in multiple times before it goes into AC mode
Sent from my SCH-I535 using Tapatalk 2
I really think that those cheap cables don't charge nearly as fast. Especially the Stock Sammy ones. I use the thicker LG cables and they seem to charge so much fast and transfer files faster..
I just went through the same thing. The phone was charging for twelve hours and only gained 50 percent. Took forever to figure out it was the cord.
Sent from my SCH-I535 using xda app-developers app
USB Cable
I think charging AC is not fast charge.
You should to charge USB cable.
Thanks.
cell128 said:
That's weird mine started doing the same thing just in the past few days. I have to unplug and plug it back in multiple times before it goes into AC mode
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
That's what my phone was doing, I'd unplug then plug it back in and would go from USB to AC, but it still charged slow. That cable, no matter what it said, would still charge slow as balls.
Sent from my SCH-I535 using Tapatalk 2
I had heard of "Buy Cheap, Buy Twice", but now we've got "Buy Cheap, Charge Twice"
A lot of times it's the DC power brick that makes the difference. Not all of them have the same power output. Rarely, if ever, is it the actual cord itself. USB cables use pretty thin gauge wire already and the only way you're going to get a difference from one cable to another would be if it was REALLY cheap and using an ultra-thin wire or if it was a REALLY long cable (increases in cable length equate to increased resistance to electrical transmission...)
All USB cables are 5 volts. However, there can be significant differences in the milliamp output for each DC adapter. Aside from being a computer geek and gamer who builds custom PC's, I happen to be a hotel General Manager. I just checked our catch-all box of phone chargers and found that while every charger has an output of 5v, the amperage put out varied from 350 mA to 1000 mA from one charger to the next.
This variance in output is why some chargers take so long as compared to others. I don't know what the actual Samsung charger output is, since my charger is at home, but my guess is it's between 800 and 1000 mA.
I use the stock BB charger to charge both my 9900 and GS3, the BB charges pretty normal but lately I've been having a problem with the charging time on my S3, I have to charge it everyday now, my usage isn't that heavy, it lasts me a day and a half normally. Going to start using the stock charger to see if there is a difference.
I'm using the Samsung stock charger after not having used it for a month and noticing that my battery levels have deteriorated after using my BB stock charger. The battery seems to be discharging while on the charger! I'm in for a world of pain, going to monitor it for a while. I could be stressing over nothing.
Hi I bought 2 keyboard folio from eBay brand new but it is like it haves a faulty battery. When I try to pair it with the tablet through NFC I press yes on the "do you want to pair the Nexus keyboard" but after some seconds it fails. But when I put the keyboard to charge it works. After I pair the devices and use the keyboard when I unplug it it stops working straight away. So I was wondering if this happened to anyone else and if it is any key combinations to hard reset the keyboard or something like that?
More people having the same issue!!!!!!!!
https://productforums.google.com/fo...ce=footer#!msg/nexus/miyKVULMUWo/7vH_5T0OGwAJ
Sent from my Nexus 9 using XDA-Developers Legacy app
Has anyone found a way to replace the battery or fix the charging issue, battery not charging?
Has anyone tried using a portable external battery charger to power the keyboard, how long does it last?
Until you unplug the external battery.
Sent from my HTC 10 using XDA-Developers Legacy app
I opened the keyboard and the battery seems to be dead because I tried to charge it with another charger and nothing was happening. On the keyboard I put another battery 400mah but still wasn't charging so I thing the board is faulty too. I will take a picture of the battery and upload it because I tried to find one but I couldn't.
Sent from my HTC 10 using XDA-Developers Legacy app
vincenzo697 said:
I opened the keyboard and the battery seems to be dead because I tried to charge it with another charger and nothing was happening. On the keyboard I put another battery 400mah but still wasn't charging so I thing the board is faulty too. I will take a picture of the battery and upload it because I tried to find one but I couldn't.
Sent from my HTC 10 using XDA-Developers Legacy app
Click to expand...
Click to collapse
Please upload any pictures you can, would be really helpful.
I was considering buying a simple small portable battery charger 1500-2200-4000~ and using it, but it would discharge too quickly, attempting to charge the faulty one in the folio. Also considered taking the folio battery/charging component and splicing in portable battery charger..
Another option I thought of, is using a male to male micro usb cable from the Nexus 9 to the folio.
I am using a generic micro usb charger works fine. I also bought a male to male micro usb cable attached to the Nexus 9 and folio, also works great. The keyboard hardly registers drawing any power.
Sorry for the late reply. That's the original battery of the keyboard which i tried to find but couldn't. The hard part is that it needs to be 1.5mm to 2mm of thickness Max so the keyboard top part can close normally. The other pictures is the modification I made replacing the battery but with a thicker one. It wasn't charging so that's why I came to the conclusion that it must be the board too that it is faulty. I connect the - and + cables from the charger to the exposed cables to charge the battery and that's it.
Sent from my HTC 10 using XDA-Developers Legacy app
That's a lot of hardware. So the battery may be good and its the charger that's faulty. Thanks for the images!
clockcycle said:
That's a lot of hardware. So the battery may be good and its the charger that's faulty. Thanks for the images!
Click to expand...
Click to collapse
NO. The battery too is faulty. Because I connect it straight to the charger and it doesn't charge.
Maybe?
vincenzo697 said:
NO. The battery too is faulty. Because I connect it straight to the charger and it doesn't charge.
Click to expand...
Click to collapse
Hey... Just bought a brand new one with the same issue straight out of the box.
Have you tried measuring the original battery with a multimeter?
The battery protection circuits will sometimes protect the battery from undervoltage by not letting them charge any more as it potentially damages them...
One way to attempt to recover the batteries is to remove the protection PCB and charge them with a LiPo charger at super low amps till they get up to like 3.3v then letting the original charger and battery protection finish charging it... (Kinda dangerous if battery really is damaged)
These things sat on shelves for years.... I can't imagine the batteries didn't drain.
Edit: did you take the keyboard apart??? Lol... Is it glued together??
I took mine apart... This is not a reversible process lol... Checked battery voltage and sure enough... 0 volts.... There's no Li-Ion charger that will ever try to charge that battery as there is a risk of fire.
Looks like HTC cheaped out on the battery protection circuit and it didn't cut off the battery below 3.3v and let it get to 0v... Gonna have to try to recover the battery using my lab power supply to trickle charge it... My lipo charger complains and won't charge it at all.
I'm having the same problem. Just bought one of these on Amazon for $30 and was excited to use it. How did they charge $130 for this when it came out?? This is useless. I'm going to have to return this junk. Any solutions before I do?
The solution is easy.
I have effected this repair on multiples of the nexus 9 folio keyboard.
Someone said earlier that the charging circuit is bad in addition to the cell being at 0v. This is simply not true. For the charging circuit and the cell to both be bad you will have likely hit the lottery in a bad way, or shorted and caused damage yourself.
Truth is that as mentioned before their protection circuit on their $130 keyboard was not up to the task. I make the assumption also that they overpriced these so heavily they sat until their hardware choices became apparent by making them DOA after the cell's voltage fell too low.
Someone stated that opening the keyboard is irreversible, this is also untrue, it only requires a bit of skill and patience.
Take it for what it is, because I would never recommend someone to revive a cell that had been sitting below 3.2v, it's just unsafe, but this is what worked for me as I didn't feel like digging through china stock to find a matching cell.
The cell is at 0v, so the fix is simple, connect another similar chemistry (3.2v-4.2v) cell in parallel (between the protection circuit and the cell.) I just used and 18650 from a laptop battery. Let's call this a "jump start." Start the charging and disconnect the second cell. Red charge LED should remain solid and charge cell 1 to 4.2v and you are good to go.
As far as the details, we know that the cell is on the left side, so only heat and slice adhesive from just beyond the corner to the center, slide your tool under the cell to remove the adhesion from the main body and carefully slip the cell out far enough to get at the contacts in order to get between the protection circuit and the cell.
main points
1 DO NOT PUNCTURE THE CELL (ALUMINUM TEARS EASILY)
2 DO NOT DAMAGE THE RED AND BLACK LEADS FROM THE PROTECTION CIRCUIT TO THE MAIN BOARD
3 DO NOT PRY OPEN THE OUTSIDE CORNER NEXT TO THE CELL AS THIS CORNER IS MORE SUSCEPTIBLE TO DEFORMATION THAN OTHER AREAS
Probably best left to a skilled tech, but it can certainly be done.
The adhesive htc uses is much like hot glue, so after scraping the old glue out reseal and press with a hot glue gun (precision tip recommended,) easy peasy.
On a final note, shame on you htc (and google.)
k2thec said:
The solution is easy.
I have effected this repair on multiples of the nexus 9 folio keyboard.
Someone said earlier that the charging circuit is bad in addition to the cell being at 0v. This is simply not true. For the charging circuit and the cell to both be bad you will have likely hit the lottery in a bad way, or shorted and caused damage yourself.
Truth is that as mentioned before their protection circuit on their $130 keyboard was not up to the task. I make the assumption also that they overpriced these so heavily they sat until their hardware choices became apparent by making them DOA after the cell's voltage fell too low.
Someone stated that opening the keyboard is irreversible, this is also untrue, it only requires a bit of skill and patience.
Take it for what it is, because I would never recommend someone to revive a cell that had been sitting below 3.2v, it's just unsafe, but this is what worked for me as I didn't feel like digging through china stock to find a matching cell.
The cell is at 0v, so the fix is simple, connect another similar chemistry (3.2v-4.2v) cell in parallel (between the protection circuit and the cell.) I just used and 18650 from a laptop battery. Let's call this a "jump start." Start the charging and disconnect the second cell. Red charge LED should remain solid and charge cell 1 to 4.2v and you are good to go.
As far as the details, we know that the cell is on the left side, so only heat and slice adhesive from just beyond the corner to the center, slide your tool under the cell to remove the adhesion from the main body and carefully slip the cell out far enough to get at the contacts in order to get between the protection circuit and the cell.
main points
1 DO NOT PUNCTURE THE CELL (ALUMINUM TEARS EASILY)
2 DO NOT DAMAGE THE RED AND BLACK LEADS FROM THE PROTECTION CIRCUIT TO THE MAIN BOARD
3 DO NOT PRY OPEN THE OUTSIDE CORNER NEXT TO THE CELL AS THIS CORNER IS MORE SUSCEPTIBLE TO DEFORMATION THAN OTHER AREAS
Probably best left to a skilled tech, but it can certainly be done.
The adhesive htc uses is much like hot glue, so after scraping the old glue out reseal and press with a hot glue gun (precision tip recommended,) easy peasy.
On a final note, shame on you htc (and google.)
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I want to try this repair on my keyboard. do you have pictures where to connect the wires.
I have a laptop battery
i have the case pulled apart
Just want to make sure that the wires are in the correct place.
The folio battery has a USB jack at one end and a switch (on/off perhaps) and a blue light at the other. What's happening when the blue light blinks?
Lindommer said:
The folio battery has a USB jack at one end and a switch (on/off perhaps) and a blue light at the other. What's happening when the blue light blinks?
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i meant if i take the keyboard apart.
I ordered another on off ebay, but i used the suggestion i thiunk i saw on here. I have a microusb OTG plugged into the nexus 9 and running a usb to the keyboard. it is supplying enough power to run he keyboard. also it does not seem top drain much power at all.
I'm typing this message on the folio keyboard. if the other keyboard folio has the same issue then i can at lease use this solution to use the folio.
now i need to order a shorter usb to microusb cord so i dont have to rubber band the cord and look sloppy when carrying it around
Thanks for that. But what about the blinking blue light?
Lindommer said:
Thanks for that. But what about the blinking blue light?
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That is paring mode if in not mistaken.
Nah, it's definitely a charging light. Doesn't blink when pairing but does when a USB charging lead is plugged in. Goes off after a couple of minutes, which confirms what we all know: the keyboard doesn't/won't charge.
Picked up one of these new from Ebay. It doesn't seem to want to charge and will only work when plugged in with charger. Anyway to get it working? Guess it's a return