Develop Bugs

Qi wireless charger

Hi,
I recently bought a qi wireless charger because my charger port of the phone broke and it's too expensive to fix.
Anyways, yesterday I left it for 2 hours the % went from 49 to 90 which I was quite happy with but I let it charge over night and it only went from 34% to 50%.
I am rooted and on AOSP.
I check the wireless current and sometimes as soon as I put it on the pad it's 1000ma but then it keeps dropping quick to 100ma. The pad as an output of 1000ma.
Csn someone tell me how to fix the slow charge. Thanks
Sent from my GT-I9300 using XDA Premium 4 mobile app

you're probalby not lining it up properly. that happens when you've misaligned the pad to the charger. find the sweet spot and just remember to place your phone there the same way.
if you're handy,you can probably also come up with a cradle of some sort so the phone falls right in place everytime.

mputtr said:
you're probalby not lining it up properly. that happens when you've misaligned the pad to the charger. find the sweet spot and just remember to place your phone there the same way.
if you're handy,you can probably also come up with a cradle of some sort so the phone falls right in place everytime.
Click to expand...
Click to collapse
I placed mini rare earth magnets under the phone's back plate, just 2 on the top area, and then 2 on the Qi wireless charger so the phone aligns perfectly with the charger, and gets the best charge it can get.. Also I opened up all my Qi Chargers and used my Dremel to remove all the extra plastic, as much as I could to remove any kind of resistance or space between the Tx Coil and the Rx Coil.. I tested the best place they could be aligned with a Multi Meter, and then added magnets.. Works like a charm.. Its a pain in the ass, but mine works out pretty well. I didn't place the magnets on the inside, I placed them on the outside of the charger.. Works well
http://www.ebay.com/itm/271329239542?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT
thats what I purchased..

uh wow... that's seriously overkill but sure.. you can do that..
although i wonder if putting magnets that strong in your phone will mess with your gps and magnetometer.
i would say a small plastic cradle or creating little edges on the transmitter so the phone just physically falls in would be an easier and safer alternative that using a dremel on your receiver.

mputtr said:
uh wow... that's seriously overkill but sure.. you can do that..
although i wonder if putting magnets that strong in your phone will mess with your gps and magnetometer.
i would say a small plastic cradle or creating little edges on the transmitter so the phone just physically falls in would be an easier and safer alternative that using a dremel on your receiver.
Click to expand...
Click to collapse
I would of thought the same thing, but it has given me zero problems when the magnets are set up top.. HOWEVER, when I tried to place 2 near the bottom, it caused all kinds of problems with USB charging and my phone locked up a few times... I'm glad the damage wasn't permanent.. I used my Hotglue gun to hold them into place, the magnetic field caused a short in the Gluegun and it EXPLODED in my hand.. I was lucky enough to drop it right when I heard the sizzle and BANG.. So when playing with strong magnets.. Be careful.
Edit: I also have an external case with the same type magnets, and even with the case on, it doesn't give me any issues, at least any I'm aware of.. I made a magnetic mount on my desktop pc, just for kicks.. But since the case is metal, I can't put a Qi charging coil on it.. Now that would be neat..

yeah.. that's dangerous in general. I honestly would not recommend anyone to do what you did considering you almost ended up with stuff blowing up un your hands.
Sent from my GT-I9300 using XDA Free mobile app

The idea behind Qi is simple: all devices with the Qi logo will work with all Qi chargers. That’s it. No need for separate chargers, no need for cables, and no need for adapters when traveling. Qi is a global standard – this means that your device can be charged wirelessly wherever you are.

[Q] Qi receiver personal experiences?

If you have bought and used a Qi receiver in your s3 for more then a week I want to hear about it.
I would like your replies to include pics of it installed in your phone. Hopeful that will keep this thread shill free.
Are they all the same level of crap?
Did yours bulge the back so bad it cracked?
Did it heat up the phone more then gaming?
Did they block NFC?
Is it slower/faster then usb?
I'm actually kinda temped to buy one of the S5 ones that are advertised as "paper thin" and modify it to fit. Some of them have pics of callipers measuring them and they look damn thin. None of the S3 ones currently on amazon or eBay look like something that won't burst into flames :/

weedy2887 said:
If you have bought and used a Qi receiver in your s3 for more then a week I want to hear about it.
I would like your replies to include pics of it installed in your phone. Hopeful that will keep this thread shill free.
Are they all the same level of crap?
Did yours bulge the back so bad it cracked?
Did it heat up the phone more then gaming?
Did they block NFC?
Is it slower/faster then usb?
I'm actually kinda temped to buy one of the S5 ones that are advertised as "paper thin" and modify it to fit. Some of them have pics of callipers measuring them and they look damn thin. None of the S3 ones currently on amazon or eBay look like something that won't burst into flames :/
Click to expand...
Click to collapse
Sorry I don't have pics. I have used one for the last year. It's been a bit of hit n miss. The quality seems to be ok as far as I can tell visually and I had bought the cheapest one I could find. I haven't had any problems with cracking of the case but it does bulge ever so slightly and any 3rd party case of tried with it doesn't have any problems with fit. The receiver is about credit card thickness. It does not block nfc on my phone. It is very much slower to charge than with regular usb, but it will charge my phone completely overnight. The problem I have with it just recently is that it doesn't consistently charge. It "loses" connection randomly. I have made sure that the contacts stay connected but still the problem persists. I'm not sure if it's hardware or software related at this point but it did use to work consistently. Also it may be the charging pad that is going funky and not the receiver itself. I have ordered a new and different charging pad that should arrive this week and I'll have a better idea of what's going on when I get it. Hope that helps a bit.

I have been using one for about two weeks now, no bulges, it overheats a bit, but I am using cm12 and boeffla kernel and have oc'ed current to 950 for faster charge so thats on me, its faster than usb atm, but a bit slower than normal charger. Didnt understand what you meant with ''blocks nfc''

The NFC coil is on the back of the battery.
These Qi stickers glue to the battery. It stands to reason one coil over the other might interfere.
Which is why I asked if you still have NFC with one installed.

I've had my S3 for a couple months now; got it as a freedompop refurb during a good sale. Came with the usb port loose and was hard to get it to charge, so I went on ebay and got a cheap qi charger (came with coil and charge plate). It was supposedly a 1000ma charging coil, though it does charge pretty fast. The charging base does heat up a bit while charging, and will heat up the phone just by proximity, but so far nothing too serious.
I don't use NFC for anything so I have no idea if it's impacted at all. There's probably other qi charging topics here with answers.
The coil barely made a dent in the backplate plastic. It is slightly visible, but it didn't impact the phone fitting in a few of the cases my friends had. I settled on a nice leather folding case that also worked as a landscape-stand.
It might be just the quality of the charge plate or the coil I received that's making this one little problem: if the phone is directly on the base (bare-plastic back to charge plate), it likes to blink in and out of charging constantly. If there's a little space though, it'll steadily charge and not blink (or very rarely blink). The gap I found to work the best is roughly the phone's normal thickness. I used a piece of cardboard and a couple gift cards to get there until I got the folding case. Folding the front over to the back provided enough space for steady charging on its own. Again, it's probably the china quality, but at least it's working well.

eyeguy616 said:
I've had my S3 for a couple months now; got it as a freedompop refurb during a good sale. Came with the usb port loose and was hard to get it to charge, so I went on ebay and got a cheap qi charger (came with coil and charge plate). It was supposedly a 1000ma charging coil, though it does charge pretty fast. The charging base does heat up a bit while charging, and will heat up the phone just by proximity, but so far nothing too serious.
I don't use NFC for anything so I have no idea if it's impacted at all. There's probably other qi charging topics here with answers.
The coil barely made a dent in the backplate plastic. It is slightly visible, but it didn't impact the phone fitting in a few of the cases my friends had. I settled on a nice leather folding case that also worked as a landscape-stand.
It might be just the quality of the charge plate or the coil I received that's making this one little problem: if the phone is directly on the base (bare-plastic back to charge plate), it likes to blink in and out of charging constantly. If there's a little space though, it'll steadily charge and not blink (or very rarely blink). The gap I found to work the best is roughly the phone's normal thickness. I used a piece of cardboard and a couple gift cards to get there until I got the folding case. Folding the front over to the back provided enough space for steady charging on its own. Again, it's probably the china quality, but at least it's working well.
Click to expand...
Click to collapse
Great idea on the spacing! Mine does basically the same thing. Never thought of moving it farther away. Sweet! But you might want to be careful if you're using gift cards that haven't been redeemed. I think, not positive, that it might ruin the magnetic strips on them.

Making my own wireless charging case

So I'm looking into the possibility of making a wireless charging solution on my own. I have lots of wireless chargers at home, work, in the car, and I would really benefit from getting wireless charging working.
I took a USB Qi charging coil and soldered wires, which I then attached (well, just touched ) to either end of the magnetic connector, and it worked.
The difficulty I'm facing is, how can I keep these wires touching the magnetic charging port semi-permanently without doing anything dangerous like attempting to solder it directly.
So I'm wondering if anyone has any neat ideas of how I might rig this up. Any ideas would help a lot! If I come up with something good, I'll make a guide so others can do it.

You could try to get someone to 3D print a side piece similar to the one on the Z3 wireless charging case from sony: http://www.sonymobile.com/us/products/accessories/wireless-charging-cover-wcr14/
Have them leave chambers to run the wire through.

JCBomb said:
You could try to get someone to 3D print a side piece similar to the one on the Z3 wireless charging case from sony: http://www.sonymobile.com/us/products/accessories/wireless-charging-cover-wcr14/
Have them leave chambers to run the wire through.
Click to expand...
Click to collapse
I've been thinking about making my own wireless charging case similar to the sony branded case but using high quality leather, and an oem qi charging circuit with a 3d printed base clip with the circuit connectors integrated into the clip, just to ensure constant connectivity.
just looking into prices for scrap leather now.

duraaraa said:
So I'm looking into the possibility of making a wireless charging solution on my own. I have lots of wireless chargers at home, work, in the car, and I would really benefit from getting wireless charging working.
I took a USB Qi charging coil and soldered wires, which I then attached (well, just touched ) to either end of the magnetic connector, and it worked.
The difficulty I'm facing is, how can I keep these wires touching the magnetic charging port semi-permanently without doing anything dangerous like attempting to solder it directly.
So I'm wondering if anyone has any neat ideas of how I might rig this up. Any ideas would help a lot! If I come up with something good, I'll make a guide so others can do it.
Click to expand...
Click to collapse
Have you tried tape? It would be covered up by your case anyway, right?

PuffDaddy_d said:
Have you tried tape? It would be covered up by your case anyway, right?
Click to expand...
Click to collapse
I've thought of tape but I've yet to figure out a way to tape it where it will definitely stay in place.
I might be able to get a case that would cover it, but my current cases have holes so that magnetic chargers could be plugged in.

I've decided to try using copper tape to connect a Qi coil to the magnetic dock port. I'll see how it goes. Hopefully it will be as easy as I'm hoping it will be.

So I finally managed to make it work. Unfortunately, I had to solder.
I gave up with trying to line things up just right and keep it in place, so I just soldered a Qi receiver to the magnetic charging port, wrapped it around to the back of the phone, and fit in a case. It charges wirelessly now, so I'm happy. Unfortunately, I don't know if I'll ever be able to clean it up in the future if I want to sell the phone. But to me, wireless charging was super important. I was also able to continue using my Z1C battery case which uses the magnetic port, so I'm pretty happy with the end result.

Pics?

it's ugly, but I'll put up pics when I get a chance.

Pictures as promised. I had been concerned adding this might block NFC, but NFC works just fine. Obviously, magnetic charging cables don't work (but a Z1C charging case I have does.)
It adds some thickness behind it so the case doesn't fit quite perfectly, but well enough to stay on. I didn't have thinner cables, but having some might have been able to decrease the thickness. Also, I'm not necessarily good at soldering, so I just did what I could.
But I can charge it on my bedside table and in my iOttie Qi dock in my car, so I'm cool with it.

hmm not pretty, but i guess it works. how is the charging speed?
you should be able to clean it up fine if you use some solder wick.

Awesome job!
Can you please give us a link for the receiver?
All I can find are with usb

ugly doesn't even start describing it... seriously, you ruined that phone. You could've cannibalized a 3rd party docking station instead

duraaraa,
Thanks for blazing this trail for us, mighty brave to solder to your phone like that! Now that you've had this set up for a few weeks, is it holding up ok? I'd just about give my left nut for an actual phone case that simply has a wireless receiver built in and taps into the magnetic charger pins, but I doubt anyone will ever make one since (I believe) the Z3C is discontinued. I mean, they make those giant external battery packs for the Z3C that use the pins, so why not a qi-compatible one??? Anyway, no way I'm soldering to my pins so I'm basically trying to mold a connector out of epoxy that I can squeeze between the side of the case and the pins. (Basically I pushed one of my magnetic cable connectors into a clay bar and filled w/epoxy.) It's still drying so I have no idea if it's feasible at all, but wanted to pop in and say thanks for the inspiration.

mralexsays said:
duraaraa,
Thanks for blazing this trail for us, mighty brave to solder to your phone like that! Now that you've had this set up for a few weeks, is it holding up ok? I'd just about give my left nut for an actual phone case that simply has a wireless receiver built in and taps into the magnetic charger pins, but I doubt anyone will ever make one since (I believe) the Z3C is discontinued. I mean, they make those giant external battery packs for the Z3C that use the pins, so why not a qi-compatible one??? Anyway, no way I'm soldering to my pins so I'm basically trying to mold a connector out of epoxy that I can squeeze between the side of the case and the pins. (Basically I pushed one of my magnetic cable connectors into a clay bar and filled w/epoxy.) It's still drying so I have no idea if it's feasible at all, but wanted to pop in and say thanks for the inspiration.
Click to expand...
Click to collapse
hows your build coming along mate I'd love to see how it looks.

kstanley7 said:
hows your build coming along mate I'd love to see how it looks.
Click to expand...
Click to collapse
Not good I'm afraid my friend... My first attempt (trying to mold a connector out of epoxy using a clay mold) failed, the thing came out looking like a chewed up piece of gum and just wouldn't work. My next attempt involved slicing up a couple of cheap magnetic adapters and cables to try to trim down the connectors to something reasonably sized, but they become really brittle when you cut them that thin... Unfortunately, I think it'd take someone with some type of plastic molding equipment or maybe a 3d printer (that is capable of making really small, fine-detail parts) to make this thing. I'm still disappointed that Sony makes a wireless case for the Z3, but not the Z3C, but I've also come to realize that the Z3C has such good battery life that maybe I don't really need such a case. (I come from a long line of Nexus, HTC, and Samsung devices so I've become somewhat of a charging addict!)
tl;dr: Just enjoy the Z3C and use the handy magnetic dock for overnight charging.

just looking at the magnetic connectors on the z3c I think there might be a way but it'll add a couple more mm to the height, would need to get someone with a 3d printer, but if the wallet is made of leather and is inserted underneath, with the qi wireless pad, and two wires made into connection terminals which would then clip onto the phone so a solid connection is made between those terminals.

Just to answer some questions, it's held up. I think it's fine -- anyone desperate for Qi should just bite the bullet and solder. Charging speed is similar to really any other Qi-charged device.

apis10 said:
Awesome job!
Can you please give us a link for the receiver?
All I can find are with usb
Click to expand...
Click to collapse
Sorry my response is so late!
It's the USB type. I un-soldered the USB ribbon and soldered a wire for the two connections.
So you would want to buy the USB version, I think.

Look into copper tape. I attempted this a little while back but I think my charging pad wasn't powerful enough. What charging pad are you using?

wireless charging solution thread

As we all know, the new Zenfone 2 is missing wireless charging capabilities, however there are multiple solutions to enable wireless charging on basically any phone.
Example is http://www.amazon.com/BEZALEL®-Wire..._1_4?s=wireless&ie=UTF8&qid=1432149451&sr=1-4
It is a cover with a Qi receiver built in, which connects to the charging port and it also provides an independent micro usb port as a part of the case.
The absence of wireless charging in Zenfone 2 is a deal breaker for me ( don't judge) and as soon as an appropriate case is available, I'll get it and the phone as well.
Please post your findings here.

Would love to use wireless charging but using a cover like the one posted is out of question.
I love the slim form and feel of this phone. so i will have to live without QI and other solutions.

This will occupy the mUSB port but would probably be the best current solution.

hkdmjack said:
This will occupy the mUSB port but would probably be the best current solution.
Click to expand...
Click to collapse
That's pretty cool. I like wireless charging because I'd rather not wear out my micro usb...but that setup kinda marries you to wireless charging all the time. I'd have to rig up wireless charging in the car and at work...not just at home. You use something like that?

nathan118 said:
That's pretty cool. I like wireless charging because I'd rather not wear out my micro usb...but that setup kinda marries you to wireless charging all the time. I'd have to rig up wireless charging in the car and at work...not just at home. You use something like that?
Click to expand...
Click to collapse
Not sure if I'm going to stick with the ZF2, so I haven't gone out and done all that yet but qi adapters are pretty cheap now for both home and car. How effective some of the car ones are though are another story. iOttie has two models out now that look promising for the car.
There may also be the possibility of placing those adapters into a separate case just meant for wireless charging... remove the case if you need the mUSB port.]
Or... if they do release new back covers... get one that you install the qi adapter in and then one that you won't have the qi adapter in.

WHYYYYYYYYY
Why did Asus decide not to include the qi pins in the back ((((((((((((((((((((((((((((((((((((((((((((
>_<
what to do :'(

Here's a teardown: http://www.myfixguide.com/manual/asus-zenfone-2-teardown/
You could solder the DigiYes posted earlier (http://www.amazon.com/gp/product/B00HI8JYFE) onto the usb board. Or you could probably just jam the wires into the connector for a non-permanent solution. The pictures of the DigiYes are a little conflicting, but if it does have leads for the data pins, you'd be best off omitting them (you'll be limited to 500ma qi charging).
This is of course assuming there's enough space to wedge the DigiYes between the back cover and phone.

ziddey said:
Here's a teardown: http://www.myfixguide.com/manual/asus-zenfone-2-teardown/
You could solder the DigiYes posted earlier (http://www.amazon.com/gp/product/B00HI8JYFE) onto the usb board. Or you could probably just jam the wires into the connector for a non-permanent solution. The pictures of the DigiYes are a little conflicting, but if it does have leads for the data pins, you'd be best off omitting them (you'll be limited to 500ma qi charging).
This is of course assuming there's enough space to wedge the DigiYes between the back cover and phone.
Click to expand...
Click to collapse
Which goes back to my point. Why did Asus purposdely omit to include QI/wireless charging pins on the back? It would had cost them hardly anything extra at all, and users could just have changed back cover to get wireless charging...

That one http://www.amazon.com/BLUBOON-Unive...2630&sr=8-2&keywords=qi+wireless+charger+1000 is 1000mA, if it does make a difference. But a case integrated receiver would be much better solution, if ever.

olegy said:
That one http://www.amazon.com/BLUBOON-Unive...2630&sr=8-2&keywords=qi+wireless+charger+1000 is 1000mA, if it does make a difference. But a case integrated receiver would be much better solution, if ever.
Click to expand...
Click to collapse
I bought that model. I have a Qi charger (used with a Nexus 5) hooked up to a 2A USB Adapter, and it barely charges the Zenfone. I do not recommend. Maybe a 2A receiver would work better.

It's ridiculous.... why did asus decide not to offer a wireless charging solution similar to the previous samsung galaxies/lg.
Have the pins for charging on the back, and let the user change the case to a qi receiver case or add a qi receiver pad inside. this is honestly the only thing that disappoints on this phone (((((((((((((

ziddey said:
Here's a teardown: http://www.myfixguide.com/manual/asus-zenfone-2-teardown/
You could solder the DigiYes posted earlier (http://www.amazon.com/gp/product/B00HI8JYFE) onto the usb board. Or you could probably just jam the wires into the connector for a non-permanent solution. The pictures of the DigiYes are a little conflicting, but if it does have leads for the data pins, you'd be best off omitting them (you'll be limited to 500ma qi charging).
This is of course assuming there's enough space to wedge the DigiYes between the back cover and phone.
Click to expand...
Click to collapse
I just received mine and there is enough space in the back cover for the receiver to fit in, albeit with a small bulge. It does show my phone as charging even when just held up to my Moto 360 cradle; whether or not it's charging, however, I have no idea.

raynan said:
I just received mine and there is enough space in the back cover for the receiver to fit in, albeit with a small bulge. It does show my phone as charging even when just held up to my Moto 360 cradle; whether or not it's charging, however, I have no idea.
Click to expand...
Click to collapse
Thanks for trying. Did you actually solder or just plug it in the usb port? If you plugged it in the usb port, does the cover close without damaging the cable?
I'm asking because if that works, we could potentially design a slightly thicker but hollow back case that could hold NFC and the wireless receive without unnatural bulges.

ameel said:
Thanks for trying. Did you actually solder or just plug it in the usb port? If you plugged it in the usb port, does the cover close without damaging the cable?
I'm asking because if that works, we could potentially design a slightly thicker but hollow back case that could hold NFC and the wireless receive without unnatural bulges.
Click to expand...
Click to collapse
It closes fine but there is a bulge and the cover is left slightly open.
Here's my solution. Doesn't look good but functional.

don't judge
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Click to collapse
Yeah I judge, wireless charging its just another feature. A small battery, a slow processor or low memory now that's a real deal-breaker since your phone wont last a day, apps will run like hell and you will always have to micromanage just for things to run properly.
I'm way more pissed off at this phone not having a removable battery, not just because its a real deal-breaker during travel where I will be forced to lug around one of those brickish power banks but because Li-ION batteries have the lifespan of a mosquito. I already had 2 phones like that and the result was always a massive pain in the ass to deal with.
I rather buy a case with an extra battery than this thing

Three pins USB Board?
Hi there
Maybe some one knows, what are those three pins on the USB board, that are accessible without disassembly phone?? That should be connectors to charging instead of usb socket?

I have a qi charger built into my car. I do not like aftermarket charger added to the phone. So this is a deal breaker for me and will not consider any phones without buildin qi charger.

Looking to buy this phone and own a quick charging card like this. Is it possible to slip the card under the back cover (without a case) or will it cause it to bulge in too unsightly a manner?
dud89 said:
It closes fine but there is a bulge and the cover is left slightly open.
Here's my solution. Doesn't look good but functional.
Click to expand...
Click to collapse

Slooop said:
Looking to buy this phone and own a quick charging card like this. Is it possible to slip the card under the back cover (without a case) or will it cause it to bulge in too unsightly a manner?
Click to expand...
Click to collapse
It can but causes a gap near the usb port that I could not close. I would've run it inside if it didn't do that.

dud89 said:
It closes fine but there is a bulge and the cover is left slightly open.
Here's my solution. Doesn't look good but functional.
Click to expand...
Click to collapse
Great Idea.
The speed of charge is 350 MAH ?? Is to slowly (USB PC charge normally 550 MAH)

Wired charging not working - Help identifying a broken component

The charging port on my Nexus 7 2013 starting playing up and only charging when the cable was held in certain positions and then finally it stopped working altogether.
I took it apart to replace the port and the problem was that the legs on the connector had actually lifted the tracks off the board.
I replaced the connector and wired the legs to the nearby pads the tracks I believe they're supposed to go to and when plugged in both the charging symbol appeared and usb data communications worked.
However I then had a slight mishap while handling it and managed to knock off and break the component pointed to by the arrow in the photo.
The component has no markings on it and is about 2mm x 1mm. I can't measure the original with a meter as it's physically broken.
Can anyone tell me what the component is so that I can replace it?

I meant to also add that while looking for info I came across this site regarding the port repair which some people may find useful although personally I think you're better of removing the sub board and then using a proper desolder station if you have access to one.
http://freemansgarage.com/blog/?p=1082

Ollie2 said:
what the component is so that I can replace it?
Click to expand...
Click to collapse
This component has a sub-ohm resistance and is a fusible resistor or choke/inductor. Either way you can just short/bridge it - no worries

k23m said:
This component has a sub-ohm resistance and is a fusible resistor or choke/inductor. Either way you can just short/bridge it - no worries
Click to expand...
Click to collapse
Thank you very much for the reply, that's just the kind of answer I was hoping for.
With the link bridged the device does show it as charging when plugged in however the charging rate is now really, really slow and at it's current rate of charge looks like it'll take about 50 hours to fully charge.
If I put an ammeter across the two pads then it looks like it pulls about 85ma whereas I'd expect it to be more like 10 times that.
I've tested it with several cables and chargers (0.5A, 1A and 2A) that used to work perfectly with it previously and still work with other devices..
I've ordered an inline usb ammeter that should arrive later today to double check the current usage but the charger or battery don't get warm so I'd guess it's correct.
The repaired tracks look to be correct and beep through fine, the data cable works and I can transfer data but presumably there is something else wrong with it.
Any suggestions of what else to look or is there anything that I need to do with software to reset the charging process?

Ollie2 said:
If I put an ammeter across the two pads then it looks like it pulls about 85ma whereas I'd expect it to be more like 10 times that.
Click to expand...
Click to collapse
The ammeter's internal resistance may trigger N7's lower charging current draw which normally happens to prevent overloading USB2 or weak chargers.
Anyway, do a recalibration:
fully discharge N7
recharge it completely while off
disconnect the charger and turn N7 on

Thanks for the reply.
I added the ammeter inline as it was charging so slowly and the 85ma it looks to pull roughly equates to the charging times I'm seeing.
The tablet is fully charged at the moment (via a wireless charger) but when it's not needed for a few days I'll flatten the battery and let it charge using the cable, I'd guess it'll take 2-3 days to do so.
Interestingly apps such as ampere show the sort of current I'd expect the device to be getting in the 800ma range however I'm guessing it's calculating this as the requested current but it's just not making it to the battery for some reason.