Database Info

i9000 induction charging mod

Ok, This seems like such a obvious thing to do that there must be a reason it hasn't been done yet.
The idea, the galaxy s i9000 has a thin plastic back cover, which wouldn't interfere with an induction charging mod. So why hasn't one been done yet?
secondary question:
via induction charging; Is it possible to charge directly to the battery connectors? or does the charge need to go through the USB port to work? I think it's a bit ugly having wires protruding out that then need to connect to a usb head and then plug into the phone... I imagine that the battery may still charge with a direct charge to the battery, but the software may not control it. (i.e. no awareness that the phone is on charge)
What do you guys think?
Cheers,
Evan

Evanlw85 said:
Ok, This seems like such a obvious thing to do that there must be a reason it hasn't been done yet.
The idea, the galaxy s i9000 has a thin plastic back cover, which wouldn't interfere with an induction charging mod. So why hasn't one been done yet?
secondary question:
via induction charging; Is it possible to charge directly to the battery connectors? or does the charge need to go through the USB port to work? I think it's a bit ugly having wires protruding out that then need to connect to a usb head and then plug into the phone... I imagine that the battery may still charge with a direct charge to the battery, but the software may not control it. (i.e. no awareness that the phone is on charge)
What do you guys think?
Cheers,
Evan
Click to expand...
Click to collapse
Possible? Yes. Safe? No.

Direct connection to the battery will probably overcharge the battery.
Sent from my GT-I9000 using XDA App

Palm Pre has it, and there was a mod for an Evo 4G using the Palm Pre coil; so a mod is perhaps technically possible. But I wouldn’t mess around with it. Inductive charging is inefficient add produces more heat compared to normal charging. Galaxy S heats up while charging even the normal way, I don’t want to make it worse.
As for charging methods, generally speaking, I much prefer open charging contacts with a desktop cradle like design (like used in home cordless phones) over inductive charging.

wouldn't necessarily overcharge if a charge controller was in place. (direct connection to battery)

Palm Pre mod here
http://forum.xda-developers.com/showthread.php?t=862879
Although no sign of him since the mod, which is a little worrying

FlanFlinger said:
Palm Pre mod here
http://forum.xda-developers.com/showthread.php?t=862879
Although no sign of him since the mod, which is a little worrying
Click to expand...
Click to collapse
Still here , and Phone including the mod are still working.
I'm quite satisfied with the mod, the only real flaw is that the compass is practically unuseable (but I never really used the compass, so i don't care)
And I does charge a little slower , the back (were the coil is sitting) gets warm after sometime , but nothing to worry about (maybe 38°C).
I would not recommend to charge the battery directly the 5V that the coil "produces" may not only overcharge the battery but may also destroy parts of the phone.
I connected the wires to the usb-port (Internally), so its like you are charging over the usb port, so there's no risk of overcharging.

Any details on how you did that? from the other thread it looks like you have one wire running off to a screw (ground point?) and another directly to the battery.

take a look at this:

well thats awsome although im a bit worried about messing with my phone

http://www.qianqin.de/2011/09/18/samsung-galaxy-s-wireless-inductive-charging-mod/

He's already ordered parts for making a fully invisible inductive charging mod (with the MicroUSB slot being completely free) so check the website in about a week or two.

can't get hold of a palm pre back... so need to make our own coil. But what length does the coil need to be?

This is all very impressive. But induction charging seems pretty useless since you can't really use the phone while charging.

disclaimernotice said:
This is all very impressive. But induction charging seems pretty useless since you can't really use the phone while charging.
Click to expand...
Click to collapse
music? remote desktop? while sleeping? tap with it on the stand anyway? attach a magnet?

Battery wires?

I'm trying to figure out exactly what the five wires are coming off the battery. 2 red, 2 black, and 1 blue.
No amount of searching has given me any answers.

tygoblin said:
I'm trying to figure out exactly what the five wires are coming off the battery. 2 red, 2 black, and 1 blue.
No amount of searching has given me any answers.
Click to expand...
Click to collapse
2 reds are probably common to each other, likewise the 2 blacks. (One way of increasing wire size for current requirement.) Blue would be the sense lead for charging.

SaurusM3 said:
2 reds are probably common to each other, likewise the 2 blacks. (One way of increasing wire size for current requirement.) Blue would be the sense lead for charging.
Click to expand...
Click to collapse
I'm trying to figure out how to make a "charging pod" for my tab. I want to be able to snap it into a case and have it charge without having to plug in the 30pin connector.

tygoblin said:
I'm trying to figure out how to make a "charging pod" for my tab. I want to be able to snap it into a case and have it charge without having to plug in the 30pin connector.
Click to expand...
Click to collapse
Not sure I follow... without drilling through the case, you'll have to plug something into that 30p. If you are going to fabricate it yourself, buy another usb cable for the tab and incorporate that into your design. But accurate alignment to avoid excessive stress/wear is the problem.

SaurusM3 said:
Not sure I follow... without drilling through the case, you'll have to plug something into that 30p. If you are going to fabricate it yourself, buy another usb cable for the tab and incorporate that into your design. But accurate alignment to avoid excessive stress/wear is the problem.
Click to expand...
Click to collapse
A lot of blackberry phones have a charging pod style dock. I was wondering if it would be possible to somehow work that into a galaxy tab. Like solder on to the battery wires.

All charging pods that I've seen use the same phone connector you plug a cable into. Older BB's had pads on back, I guess, like a cordless phone. But you need a current limiter/regulator between the external contacts and the battery, regardless. Best go with the cable connector, like I said. But if you insist on hacking your case, you'd better learn how chargers work first.

SaurusM3 said:
All charging pods that I've seen use the same phone connector you plug a cable into. Older BB's had pads on back, I guess, like a cordless phone. But you need a current limiter/regulator between the external contacts and the battery, regardless. Best go with the cable connector, like I said. But if you insist on hacking your case, you'd better learn how chargers work first.
Click to expand...
Click to collapse
Yeah I was just wondering how possible it would be to do. I might just find a new way to go about this. Thanks for the help!

SaurusM3 said:
2 reds are probably common to each other, likewise the 2 blacks. (One way of increasing wire size for current requirement.) Blue would be the sense lead for charging.
Click to expand...
Click to collapse
a better question then is this... :
would i tie the two blacks with the blue or the reds with the blue to start the charging direct?
if i hook the charger lines direct to the battery with it out of the tablet all together using the red and black from the charger to the battery would i be using the blue wire at all? would i want to hook to only specific red and black wires? ( the USB pins have entirely crapped out... but a battery is just a battery and can still be charged (tested in another tab to charge still and then tested powering up the unit and it did power up so the problem is the pins in the USB port.) sure would be cool if someone could say the answer, but i will be taking another port of another machine and soldering it to my tabs motherboard....

I had the same problem with a Samsung tablet the USB port was all messed up beyond repair. I found a charging source with the same voltage (3.7) and combined both black together then the blue with the two red and the charger is indicating that it is charging. Haven’t plugged it back into the tablet yet but I’m sure that it will work.
So I would recommend connecting the blue with the two red

Yes. With any DC electronics the red wire will be load wire(positive) and the black is the neutral wire(negetive). But the ground wire(signal wire) accompanies the load wire. How will the signal move if it didn't?

If you bypass the charger port you won’t have the protection circuit that your original charger port has if I was you I would make a case with the 30pin usb connector invaded in it e.g tab will side and click in to the case ! You can the cut of the usb end and then make a 2pin connection on the back of the the tab case witch will then connect with ease to your prototype docking station I have done similar projects if you would like to elaborate on this with me feel free to email me at :
[email protected]
I’d be thrilled to help and show you things iv made on the same principle ! Happy inventing peace out
Steve

I took one red, and one black from the battery and same for the charging cord. The red to the red, and blk to blk. It charged just fine like that. Two batteries were charged, both Samsung tablets. Forget what kind exactly, it was almost a year ago.

Power key dont work... I need to make a bypass shortcut way to start which connection do i need to short to open my Samsung N8000 Tab..thanks

[Q] Would wireless qi mod be possible?

So I noticed the wireless QI receivers have started becoming literally paper thin lately.
And with this girls teardown, https://www.youtube.com/watch?v=dweww9_RF2E#t=224
I think it looks like you could remove the thin plastic over the battery, and fit a QI receiver there.
Thoughts?

Shadowdancer123 said:
So I noticed the wireless QI receivers have started becoming literally paper thin lately.
And with this girls teardown, https://www.youtube.com/watch?v=dweww9_RF2E#t=224
I think it looks like you could remove the thin plastic over the battery, and fit a QI receiver there.
Thoughts?
Click to expand...
Click to collapse
we wouldn't be able to remove that plastic piece because it hold the battery, but it is stil possible. i already did recon on some places to solder in a wireless charger.

Legacystar said:
we wouldn't be able to remove that plastic piece because it hold the battery, but it is stil possible. i already did recon on some places to solder in a wireless charger.
Click to expand...
Click to collapse
Curious, but I'm looking at the flat cable that just lies there, under the M-logo. It doesn't appear to have any PCB at the end?
I wonder if they were thinking about adding a QI coil there, but decided it was too expensive?

Shadowdancer123 said:
Curious, but I'm looking at the flat cable that just lies there, under the M-logo. It doesn't appear to have any PCB at the end?
I wonder if they were thinking about adding a QI coil there, but decided it was too expensive?
Click to expand...
Click to collapse
That's my theory since the nexus 6 has wireless and they are the same chassis essentially . or it was for a fingerprint scanner they abandoned. Once we see a nexus 6 teardown we will have a better idea if we can do it.

Legacystar said:
Once we see a nexus 6 teardown we will have a better idea if we can do it.
Click to expand...
Click to collapse
Been waiting for that...

Shadowdancer123 said:
Curious, but I'm looking at the flat cable that just lies there, under the M-logo. It doesn't appear to have any PCB at the end?
I wonder if they were thinking about adding a QI coil there, but decided it was too expensive?
Click to expand...
Click to collapse
Could have sworn I read somewhere that between they cable and a teardown of the software showing code for a fingerprint scanner, the original idea was to have the scanner. I could be wrong though.

gotzaDroid said:
Could have sworn I read somewhere that between they cable and a teardown of the software showing code for a fingerprint scanner, the original idea was to have the scanner. I could be wrong though.
Click to expand...
Click to collapse
Let's hope you're wrong then.
It would be really cool to have wireless charging, shame so few manufacturers add this.
The amount of stuff needed to make the coils on the receiving end is pretty limited, I could absolutely accept buying the transmitter separately, (like the turbo charger is now)
But I suspect the patent royalties are expensive, patents sure don't benefit users..

Wireless charging
Anyone able to confirm if this is possible after the nexus 6 tearnever down?

bleys121 said:
Anyone able to confirm if this is possible after the nexus 6 tearnever down?
Click to expand...
Click to collapse
Looks like the nexus 6 has a different config then the moto x so as far as a plug and play solution, no. I have located 2 contact locations where we could solder in a qi coil. I'm just trying to work up the courage to try it lol

Here is a related question: without modding the phone itself on the 2013 and 2014 model I cant get one of the QI receivers to work. This is the one for sale on eBay / amazon / newegg with a micro usb end to plug into the micro usb port. It literally works with every other micro usb device i own including a Samsung bluetooth headset, several phones and some other stuff i cant think of at the moment... On the moto x 2013 and 14 I literally see no charge and see it actively loose charge over time with this device plugged in.

It may be tricky with the moto x. There are some negative and some positive reviews here for example: http://www.amazon.com/gp/aw/cr/B00MN3RR7Q/s=sd/ref=mw_dp_cr
There are also some reviews saying they needed to restart the device once while on the charger: http://www.amazon.com/gp/aw/review/B00H7FJX7M/R2YPDLOU1BD4QE/ref=mw_dp_cr?cursor=2&sort=rd
You can find more of those comments on the internet. Could you try that, and if it works clarify if you need to restart it every time you want to charge or every time you connect something else?
Here is another link for the original moto x: http://www.reddit.com/r/MotoX/comments/2gskxw/original_moto_x_wireless_charging_mod_qi/
Edit: you may need a screen lock, e.g. the pattern lock.
http://forum.xda-developers.com/showthread.php?t=2596469
An unrooted Moto G needs to be screen locked (I use the pattern lock type) or it will refuse to charge due to the missing pins. You can unlock the screen while it is charging as long as you don't lift it from the qi charger. (tested on 4.3 and 4.4.2, DE and FR firmware)
Click to expand...
Click to collapse

Legacystar said:
Looks like the nexus 6 has a different config then the moto x so as far as a plug and play solution, no. I have located 2 contact locations where we could solder in a qi coil. I'm just trying to work up the courage to try it lol
Click to expand...
Click to collapse
Go for it lol! Take some nice pics if you do. You'd be my hero.
Sent from my Nexus 5 using Tapatalk

Well chaps, bad news. I don't think this is going to be possible. I spent 6 hours today trying various solder points. Couldn't get any of them to actually charge the battery. Seems to be some sort of system configuration thats interfering with how its detecting .

Legacystar said:
Well chaps, bad news. I don't think this is going to be possible. I spent 6 hours today trying various solder points. Couldn't get any of them to actually charge the battery. Seems to be some sort of system configuration thats interfering with how its detecting .
Click to expand...
Click to collapse
Did you look at /sys/module/msm_otg/parameters/floated_charger_enable? It might not be enabled. Here's a similar thread for the Moto G:
http://forum.xda-developers.com/showthread.php?t=2688276 (see the update at the top)
http://forum.xda-developers.com/showthread.php?t=2601628 (thread for the app, not sure it works on X2 but you can check manually through ADB for the above /sys path).
As far as I know, wireless charging won't work without a pattern lock or having that option set. My Moto X won't be here until next week so I can't do any testing until then.

romracer said:
Did you look at /sys/module/msm_otg/parameters/floated_charger_enable? It might not be enabled. Here's a similar thread for the Moto G:
http://forum.xda-developers.com/showthread.php?t=2688276 (see the update at the top)
http://forum.xda-developers.com/showthread.php?t=2601628 (thread for the app, not sure it works on X2 but you can check manually through ADB for the above /sys path).
As far as I know, wireless charging won't work without a pattern lock or having that option set. My Moto X won't be here until next week so I can't do any testing until then.
Click to expand...
Click to collapse
I tried pattern lock, didn't help. Wireless charging does not require a lock, my girlfriend has a droid maxx and wireless works without it.
As far as the module check, I don't have root on Verizon so I wouldn't be able to test it.

Legacystar said:
I tried pattern lock, didn't help. Wireless charging does not require a lock, my girlfriend has a droid maxx and wireless works without it.
As far as the module check, I don't have root on Verizon so I wouldn't be able to test it.
Click to expand...
Click to collapse
You are correct about wireless charging in general. I think the reason the pattern lock is suggested is because the wireless mod (even without internally mounting it) only provides 2 wires on the USB connector. Something about only having 2 wires, and not the data pins, is why the locking is suggested.
No worries on the module, just something I had seen while investigating. I don't know if the Maxx supported wireless charging out of the box, but it may have the flag enabled by default (that flag seems common among many Moto devices).
I'm coming from a Nexus 5 and I'll really miss wireless charging, hence my questions to you

romracer said:
You are correct about wireless charging in general. I think the reason the pattern lock is suggested is because the wireless mod (even without internally mounting it) only provides 2 wires on the USB connector. Something about only having 2 wires, and not the data pins, is why the locking is suggested.
No worries on the module, just something I had seen while investigating. I don't know if the Maxx supported wireless charging out of the box, but it may have the flag enabled by default (that flag seems common among many Moto devices).
I'm coming from a Nexus 5 and I'll really miss wireless charging, hence my questions to you
Click to expand...
Click to collapse
The Maxx has it built in from moto, same internals as the moto x essentially. If we get root I could look at the module thing. I was lucky that I had access to a spare moto x main board so I didn't have to solder on mine. That won't be the case in the future.
I'm going to post all the points I tried so maybe someone can figure this out. I was able to get it to show charging but only right after reboot and it would stop once I took it off and replaced it. I have to emphasize it showed charging but never actually charged the battery, it would show charging in battery stats bit not in the status bar. I also use battery monitor widget to check the current and it never showed positive charge current. Once I was able to get it to details at as a USB charge, only happened once, still didn't charge though.
This all makes me think there is something screwy going on.

Legacystar said:
The Maxx has it built in from moto, same internals as the moto x essentially. If we get root I could look at the module thing. I was lucky that I had access to a spare moto x main board so I didn't have to solder on mine. That won't be the case in the future.
I'm going to post all the points I tried so maybe someone can figure this out. I was able to get it to show charging but only right after reboot and it would stop once I took it off and replaced it. I have to emphasize it showed charging but never actually charged the battery, it would show charging in battery stats bit not in the status bar. I also use battery monitor widget to check the current and it never showed positive charge current. Once I was able to get it to details at as a USB charge, only happened once, still didn't charge though.
This all makes me think there is something screwy going on.
Click to expand...
Click to collapse
I ordered a Pure Edition (Cyber Monday deal was a great one) so if nothing else I'll have root to poke around. Pictures of where you tried would definitely be helpful. I think I saw some from you in another thread, but all in one place would make searching easier
A 5V near the USB port would be ideal because then we'd know its likely feeding into the battery or charge circuit. 5V elsewhere on the board may not be wired to the battery. Looking at the photos in that Moto G thread may give you an idea on where to poke around with a multimeter.
The charging after a reboot, and until you picked it up, sounds like maybe you did have it at one point. That whole "until you pick it up" is another thing mentioned by many in those Moto G threads.
What wireless charging receiver did you use (not your base station)? The one I ordered says "up to 1000mAh" but I had seen some at 500 or 650. A lower output rating may not be enough to charge the battery at all. One way to test this would be a very low output wall charger (one that puts out 500mAh for example) and see if the X shows charging when connected to that.
On a related note, how hard is it to disassemble the X? Some of the teardowns look like it could be a pain.

romracer said:
I ordered a Pure Edition (Cyber Monday deal was a great one) so if nothing else I'll have root to poke around. Pictures of where you tried would definitely be helpful. I think I saw some from you in another thread, but all in one place would make searching easier
A 5V near the USB port would be ideal because then we'd know its likely feeding into the battery or charge circuit. 5V elsewhere on the board may not be wired to the battery. Looking at the photos in that Moto G thread may give you an idea on where to poke around with a multimeter.
The charging after a reboot, and until you picked it up, sounds like maybe you did have it at one point. That whole "until you pick it up" is another thing mentioned by many in those Moto G threads.
What wireless charging receiver did you use (not your base station)? The one I ordered says "up to 1000mAh" but I had seen some at 500 or 650. A lower output rating may not be enough to charge the battery at all. One way to test this would be a very low output wall charger (one that puts out 500mAh for example) and see if the X shows charging when connected to that.
On a related note, how hard is it to disassemble the X? Some of the teardowns look like it could be a pain.
Click to expand...
Click to collapse
i've attache da picture of the points i used and the results are as follows.
1. shows 5v when plugged in. when wireless coil is attached to it, will power the phone up without the battery connected (doesn't boot, just shows a battery on screen)
2. pretty much exactly the same as spot 1
3. shows 5volts but doesn't power the phone
4. shows 5v but doesn't power the phone
5. you can't see it in the picture because the rubber cover for the usb port is on but there is a diode right behind the usb port. this one is the only port i was able to get it to say usb charging ONCE. other then that, acts the same as 1 and 2.
again i have to emphasize that even though they show charging initially, they never actually charge the battery.
I'm using a galaxy s3 qi insert 700ma. i think there is a mislabeling on some qi pads saying 1000ma but not considering the 30% loss in inductive charging. even ones with 1000 on them tend to charge around 650ma. some label including the loss.
As far as teardown it's not too complicated to get the back off, lots of adhesive so be careful to not bend the back cover. i have leather so that was a particular hassle as i didn't want creases in the leather. after that there are 17 screws to remove. i've included a picture of the ones you need to remove. the ones around the silver ring on the "moto" logo don't need to be removed along with the silver screw for the buttons.
after you remove the screws and disconnect the buttons and battery from the board the back battery plate comes off in one piece. one of the particularly hard parts about testing points is you can't turn the phone on because the power button is part of the battery plate. also when you put the battery plate back on and you have wires running to contact points it won't fit because there is a speaker "box" that sections off that circuitry. i combated this by using copper tape to essentially make my own tiny custom circuit pathways leading out of that box where i then could attach wires and run them up through the hole that the battery connector goes.
THIS IS NOT FOR THE FAINT OF HEART!

i'm going to write up a tear down guide for this phone. what section do you guys think i should post it in?

Nexus 9 keyboard folio faulty

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.)
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?
Click to expand...
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

[TUTORIAL] I added wireless charging to my OnePlus 6

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?