TL;DR version: Three chargers I own cause the exposed metal part of my phone's body to light up a contact tester. One of the chargers causes a tangible shock. I'm not sure what is wrong.
I bought a new phone today, the Asus Zenfone 2. Until this evening, I had a plastic-bodied Sony Xperia SL, and as a charger, I've been using a Nextech charger happily over the past year or so, which has two outputs - 1A and 2.1A.
When charging my new Asus Zenfone 2 with the Nextech adapter, I felt a small but definite shock when I touched the small metal rim around the phone's volume buttons. A contact tester also lit up when touching that rim. When charging the same phone, but instead with the supplied Asus charger (2A output), the tester still lights up, but somewhat less brightly, and upon daring myself to touch again, I didn't feel a definite shock.
I then tested the same adaptors on my old Sony phone (which doesn't have exposed metal parts, but I connected my VSonic earphone's metal Neutrik plug into the headphone jack and tested the plug), the same results occur, both chargers cause the tester to light up, but the Nextech one noticeably brighter. Finally, I tried an old HCL adapter (0.5A) with both phones, which caused the tester to light up, too. I stopped touching any metal connected to the phones at this point, because I'm terrified of electrical shocks.
Now both phones do not cause the tester to light up while charging via my mother's Samsung adaptor (0.7A) or my old Sony adapter (0.85A).
My knowledge of electrical issues is very poor, and something is clearly wrong with either three of these chargers, or the electrical connections in my house, or the phones.
Can the knowledgeable people here please help me diagnose what's going wrong, and what I should do? My mostly electrically-ignorant mind first thought my new Asus phone is leaking electricity through the exposed metal part, but on realising that my earphone plug also lit the tester up when connected to my previous phone, I stopped panicking as much.
What is wrong here, and what should I do? Is my new phone 100% all right?
Is the phone supposed to allow current to leak to the metal part of the body, or is that some defect? And does this entire situation just mean the Nextech charger is at fault?
Hi, thank you for using XDA Assist. You should ask in your device specific forum if this is common for your device. From your other posts I see you know where it is but just in case, http://forum.xda-developers.com/zenfone2
Thread closed.
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!
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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.
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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.)
Click to expand...
Click to collapse
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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Click to collapse
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?
Click to expand...
Click to collapse
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
my new z5c won't charging when i plugged in to charge phone boots up and stuck on 0% but charging animation wont starts even when i connect it with PC the error USB NOT RECOGNIZED appear and phone stuck on 0%
i think charging dock is short cause i have used my Mobile underwater :crying: Can anyone help me? Any suggestions?
hmm, try to clean with abit alcohol with thin cloth the usb port, and air pressure
(the port got rubber on it you can see it even on the photo you have uploaded)
might be some salt making short on the conductors
(in case you didn't swim in sweet water according to sony the phone P68 should survive only in sweet water)
Please send your phone to repair service. The charging via power supply is defect. Charging via USB cable on computer will work. They will change the motherboard. I had this problem last week too.
I've always liked the idea of being able to drop my phone on the desk or the side of the bed and let it slowly recharge without having to plug and unplug a cable. I also hate those bulky and ugly wireless chargers adapters that you connect to the charging port and slip them behind the case, since the adapter takes up the only charging port on the phone, and if you want to charge wired you have to unplug the thing before plugging the charging cable.
So, I bought one of those adapters, and fit it inside the phone, and it works great, and the phone doesn't get even a tiny bit warm during the charging period. I bought all the things on AliExpress, but you can find stuff everywhere online. Here's the links for all the materials and a video tutorial that I made:
Video tutorial
Charging receiver
Disassembly kit
Here's a soldering iron if you don't have one
A new back glass if you want to change it or accidentally break it
Sticker to stick the glass back on
Insulating tape
Remember that I did NOT do this project to turn it into a tutorial for other people, I just made it and then thought about sharing it, so only do this if you really, really know what you're doing, cause you might break something and I can't be responsible for that. I did this without even knowing if it was going to work or not, and it worked.
If you have any questions just ask, I'll try to help if you want to try this project for yourself.
Using vbus for chaging is clever, but is it triggering the overcharge protection? I mean does it stop charging after phone reaches %100? I will do it to my xiaomi mi 9 se, found that vbus and ground pins next to each other so it must be an easy install but i have doubts about overcharging the battery. Do you think is it going to be a problem? How is your device doing when it reaches %100?
I wanted to buy a magnetic cable for my phone but a lot of people especially on reddit say that it can cause damage to your device.
So I researched a little bit and I can't find any threads about any damage on the internet so I wanted to ask if it is true or just misinformation from reddit ?
bump
[ https://simplymagnet.com/are-magnetic-chargers-safe/ ]
What is humidity level in your area? If it is very moist atmosphere then unplug adapter from usb port so that moisture doesnt remain in the gaps of the charging port. A moisture corroded port happens if we leave any usb device connected all the time to any metallic port in an environment with lot of moisture.
OldNoobOne said:
[ https://simplymagnet.com/are-magnetic-chargers-safe/ ]
What is humidity level in your area? If it is very moist atmosphere then unplug adapter from usb port so that moisture doesnt remain in the gaps of the charging port. A moisture corroded port happens if we leave any usb device connected all the time to any metallic port in an environment with lot of moisture.
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Click to collapse
From central europe so it is a little bit humid sometimes but I don't think that it is that humid to corrode the metal.