[Q] battery won't charge - Nexus 7 Q&A, Help & Troubleshooting

My device has the charging icon on the battery picture at the top but the battery level itself isn't increasing. After 4 hours on charge with no use it is still on 13% as it was before I tried charging it. The battery level isn't decreasing when in charge either. The wire itself is a bit broken would the cause the problem and should I just buy a new lead or is it likely to be a problem with the device/ battery ?

claire13524 said:
The wire itself is a bit broken would the cause the problem and should I just buy a new lead or is it likely to be a problem with the device/ battery ?
Click to expand...
Click to collapse
Do you mean the charging cable is damaged? If that's the case I would definitely start there and try a different charger first.

charging
PrizmaticSmoke said:
Do you mean the charging cable is damaged? If that's the case I would definitely start there and try a different charger first.
Click to expand...
Click to collapse
had a lot of issues with the original charger cable, it did not connect very well. using another charging cable from my phone solved the issue. btw my charger itself well was overcharged I guess and now I can;t use it anymore. but enough other ones are laying around.

Solved - Battery won't charge
Like many others I've had charging problems with my Nexus 7 since it was almost new. It would intermittently not charge (even though the display indicated it was) or charge very slowly. I tried every suggestion listed in the forums that didn't involve opening the tablet. None of them made any difference. The charging issue gradually became worse until a couple of months ago when the battery wouldn't charge at all while the tablet mocked me with it's cheerful charging indicator.
For my tablet the problem was solved by changing the USB connector in the tablet. It took 20 minutes, cost $10 delivered (on Ebay) and is now working fine.

Related

Weird Problem

My Atom has been working excelent for more than 6 months.
The problem is that when I try to charge it through the AC or a USB it doesnt charge anymore, the orange light doesnt turn on and the symbol in the phone turns only for a few seconds fron the battery into a wall plug, but then nothing...
I took out the battery and then charge it and worked but only when the device is off completely not when it is on or on stand by...
What can I do?
I just made a self diagnostic and when it gets to the part of the USB/AC Charging it says battery 100% charged (it passes the test) and that is not true, battery is at 18% right know
Same...
I have the same issue where my battery always shows as 100% even when you use it to 1% its still shows 100% and then it just quit when it runs out. Damn weird.... Just happened today and I only had the Atom Exec for 2 months... Any input would be much appreciated. Thanks!
Resolved
It was faulty battery not reporting correct capacity & usage.
I had a similar problem with my Atom. It could not charge the device from USB at first, then it got worse and stopped to charge from wall outlet. What I found out was that the connection plate at mini-USB port of Atom was worn out slighlty. I solved the problem by forcing usb cable connector into a mini-USB port, so it went further a bit (half a millimeter) and now everything is Ok - no problems to charge from either USB cable or wall charger.
I had the same problem, and found out that one pin in the mini usb socket bent downwards, fixed it myself and now its working fine
ozamalloa said:
My Atom has been working excelent for more than 6 months.
The problem is that when I try to charge it through the AC or a USB it doesnt charge anymore, the orange light doesnt turn on and the symbol in the phone turns only for a few seconds fron the battery into a wall plug, but then nothing...
I took out the battery and then charge it and worked but only when the device is off completely not when it is on or on stand by...
What can I do?
Click to expand...
Click to collapse
Mate! You gotta bring it to the SC... Its the fuse. The charging loop gose through the fuse and since it doesn't charge - most likely its the fuse (yo can test it with the normal tester...) If its not the fuse, it can be either of two - UEM Chip (Universal Energy Managmnt) or your PA (power amp). You can test it by measuring the resistance on the very left contacts of the battery ON YOUR PHONE! If the resistance close to 1 - its PA...
Wouldn't recomend to replace it yourself... Go for repair centre.
It's going to be a loose USB connection...
I did it on mine a while back, you have to hit the patch cable fitting in vigorously to the unit, and then from that day forward, no problems with charging!
Clean battery + phone><batt contacts if that makes you happy (it made me reassured)
G

Wizard looks like is recharging, but in real it doesn't!

Hi guys,
my beloved qtek 9100 is having some weird behavior since last week: i let my battery drain to 9% and then recharged. The phone would not recharge it, showing a red led. After lurking and learning about this problem on those devices I made a "starter" with three 1.5v batteries and gave the battery the necessary tension to start recharge cycle.
I thought that would be the solution but no: the phone kept stopping recharging at 25% or, the next time, at 75% with no apparent reason. Then, i tried many solutions like directly charging the battery with a cut usb cable, with the stock charger, with powered on phone, powered off phone, etc. No clue.
What leaves me shocked is that the battery, even when at 75%, drops suddenly to 0% after enabling the radio module thus killing the device...
An important note: same behavior with two different batteries...
I'm going nuts...
Problem still unsolved. Today i left the device recharge at 100% (took about 3 hours), detached it and tried a rom downgrade. Obviously it died at 50% of rom upgrade procedure. Sweet...now it's almost bricked, bootloader screen and recovery procedure to be done
What could it be, an hardware failure?
Hi there, same problem here: I have the phone with two batteries, on half a year old, one brand new. The batteries DO charge on another phone, but after a regular charge is gone, my phone never gecharges the batteries. It might be the charger circuit? If not HW, is there any chnce to do some SW stuff?
Unfortunately this thing s just a brock now ...
Bye
mr.groovie
mr.groovie said:
Hi there, same problem here:[CUT]
mr.groovie
Click to expand...
Click to collapse
It's good to find someone with my very same problem...although i've got no solution, still!
Is there someone out there who knows how much would cost a fix and if it's an hw issue or not? Would it be possible to fix it via DIY?
Thanks in advance
Someone suggested me to test the current output on the main contacts to see if the device is actually supplying power to the battery.
So i plugged the wall-charger on the device, took a multimeter, checked the output: the device is supplying 3.5-3-7 volts. So, i suppose it is correctly charging. Why, then, after a turn-off / turn-on the charge level drops after showing as completed?
Could it be a sw problem, then?
USB voltage is 5v. If you are not getting 5v on the USB plug coming from that charger, then that is probably your problem. Have you tried using a USB cable to plug it into your PC to charge?
d0ug said:
USB voltage is 5v. If you are not getting 5v on the USB plug coming from that charger, then that is probably your problem. Have you tried using a USB cable to plug it into your PC to charge?
Click to expand...
Click to collapse
Thanks for the hint
I suppose the problem is another...in fact those 4 volts are coming from the battery itself. Pluggin in or out the power plug doesn't make any difference.
I tried taking out the battery and there's no power coming through the main contacts of the phone. Is this the right way to check or should i use some different method?
Thanks again
Last question: is there someone who could show me where the recharge circuit should be on the mainboard? Have you got any information about the ease of a diy repair and about the price / availability of the spare part?
Thanks in advance
spidernik84 said:
Last question: is there someone who could show me where the recharge circuit should be on the mainboard? Have you got any information about the ease of a diy repair and about the price / availability of the spare part?
Thanks in advance
Click to expand...
Click to collapse
Are you using the wall charger or with the PC. Cus you will get more power input from the Wall. As so i dont know the reg key off hand but if you change one thing you can make it so your phone does not charge off the PC. Maybe you have found a new one!
funman said:
Are you using the wall charger or with the PC. Cus you will get more power input from the Wall. As so i dont know the reg key off hand but if you change one thing you can make it so your phone does not charge off the PC. Maybe you have found a new one!
Click to expand...
Click to collapse
With both the wall charger and the pc usb plug. Checked the registry key and no way, it's ok.
It's really incredible, the total charge cycle takes a couple of hours, like if it were charging regularly, but after unplugging it goes down. It is like if the "carge counter" or similar records the charging, with the battery actually not receiving power.
did you solve your problem yet?
toanhung said:
did you solve your problem yet?
Click to expand...
Click to collapse
Hell...no!

charging problems

Hi guys asked it once before in battery section, but no replies.
My HD doesn't charge auto, when I press the on button the battery charges for 15 sec. tried a new battery same result. I know it Physicly charges, when I charge the phone by pressing the on button a couple of 100 times (really 100x) I get 1% charge. So don't say 'HTC phones only charge when on', cause I know.. Tried a Hard reset 2 times no luck. meanwhile my batt. is dead. So I can't try other firmware.(need 50% charge min)
(chargers are fine)
In short, anybody ever heard of this problem before with other htc models/HD ?
Physicly it charges, so would a firmware change help?(then I need to get a standalone charger/new battery with charge).
My last option is to bring it to HTC but that would take a month
Sorry for number of words on this lazy sunday.
Update - firmware update doesn't work.. next is radio....
no ideas anybody?
Hi,
Unfortunately I dont know much other, then charge the battery in another HD up if available (maybe u can ask in a telephoneshop or so) and then test the Firmware changes.
Is the same if you charge it via PC/USB?
thx for the reply, did just that, changed Rom/radio, official and dutty's rom's, no change. No problem sync. have atleast 3 usb chargers none of them work. When connected to usb cable 2 lights blink 1 green 1 amber one after each other. just like a new message/ low battery even when battery has 50% I get the same light patern, (this is a new battery).
The thing is when the battery is completly flat it stil charges for 15 sec then it turns of. So when I charge it 15 (x15 sec) times or so I'm able to turn the device on again. But when it has (some) battery power the lights start blinking again and I'm completly unable to charge the battery.
The phone is almost 2 weeks old and charged normaly until I checked the "don't charge when connected to usb" option in the power menu. ??!
Then I think you wont get around, to send it back for repair.
have you tried to charge it with a wall socket or is this only when you usb to pc charge??
Jbvb said:
have you tried to charge it with a wall socket or is this only when you usb to pc charge??
Click to expand...
Click to collapse
I never charges, wall/usb doesn't matter.
I just used another HD battery to restore everything to default, So I'll guess I'm taking it back..
Thx anyway.
exact same problem
Did you get anywhere with this problem? I have been strugling with the exact same thing... I have tried all the same things as you, only sometimes it seems like it might be the battery contacts.. I havent been able to consistently get it to work but sometimes if I firmly press the battery against the contacts it will behave normally
philbrown23 said:
Did you get anywhere with this problem? I have been strugling with the exact same thing... I have tried all the same things as you, only sometimes it seems like it might be the battery contacts.. I havent been able to consistently get it to work but sometimes if I firmly press the battery against the contacts it will behave normally
Click to expand...
Click to collapse
Nope tried the contacts but they work fine, battery just won't charge, do your light also blink? (on the power button).
I haven't found any info on the web?!?:S
Problem is solved.. had to be sent back to HTC for repair, it took less then 2 weeks (door to door) so that was pretty fast. They swapped the mainbord, so I got my 'old' phone with a new imei.
So don't waste your time with software up/downgrades. It's a hardware problem.
I had a very similar problem.
Once my battery died some app hung system all night.
No charging at all wall charger and USB 1 day each and so many manipulations. The indicator blinks momentarily and then nothing. I didn't try (didn't know) the key presses like Dogtag. Did a hard reset still nothing...
Then thought about charging the battery with external (Lion) charger before sending for repair. I also shorted the battery compartment pins momentarily. To my pleasant surprise everything back to normal
So far no problems after that though I never drained my battery to zero.
Looks like something to do with corruption in battery calibration data - may not be in ROM?? who knows??
fantastic. can u elaberate?
hey Cragee
I did't understand what u did. Can u try to explane it to me one more time?
I'm realy excited about a posible soulution
hooray
ckraft
crajee said:
I also shorted the battery compartment pins momentarily. To my pleasant surprise everything back to normal
So far no problems after that though I never drained my battery to zero.
Looks like something to do with corruption in battery calibration data - may not be in ROM?? who knows??
Click to expand...
Click to collapse
Only two things I did can matter -
1. Charging the battery after taking it out (with a battery charger*)
2. shorting pins in the battery compartment after taking out the battery. (Warning: not on batteries)
Don't know which of the two worked.. No harm trying both anyway.
* U need a Li-ion battery charger - else invitation for trouble including fire and explosion.. These are available in electronics shop at a reasonable price.
Short-circuiting the battery pins... seems to work
I had the same problems with my Touch HD the last few weeks:
- stopped charging after a few seconds
- didn't charge at all (nor the wall nor the computer method, on or off)
- well... it charged sometimes but randomly, keeping it on a wall charger (on OR off) for a night could bring it back to 20% and then rapidly back to 0%
- no charging indicator in the screen while turned on
- blinking orange and yellow (?) light even while turned off
- charged almost never to full and 'jumping' from high to ultra low capacity when turning it on & off
So before bringing it back to the store i tried to short circuit the battery pins as suggested (while the battery and charge were unhooked) like the thing you would do to clear the CMOS memmory of a PC in the 'old days'
And for now it seems to work, at least the charging icon is back online!
I'll keep you posted on longer term results!
Update: I switched to the wall charger and the HD died again??? Now it's back on the computer and it seems to charge fine... why????
crajee said:
I had a very similar problem.
Once my battery died some app hung system all night.
No charging at all wall charger and USB 1 day each and so many manipulations. The indicator blinks momentarily and then nothing. I didn't try (didn't know) the key presses like Dogtag. Did a hard reset still nothing...
Then thought about charging the battery with external (Lion) charger before sending for repair. I also shorted the battery compartment pins momentarily. To my pleasant surprise everything back to normal
So far no problems after that though I never drained my battery to zero.
Looks like something to do with corruption in battery calibration data - may not be in ROM?? who knows??
Click to expand...
Click to collapse
When u say "shorted the battery" do u mean, turnoing phone off, taking battery out, connecting the 3 battery connectors with a wire for a few seconds?
....so what does shorting mean??
cxkx said:
When u say "shorted the battery" do u mean, turnoing phone off, taking battery out, connecting the 3 battery connectors with a wire for a few seconds?
Click to expand...
Click to collapse
I thing so. You should circuit the pins WITHOUT battery. In any other case it may occurs damage on the telephone
Dogtag is right... it's defenitly a hardware problem
As posted before...i had the same problem with my touch HD, charging was a pain or sometimes seemed impossible. The phone was repaired twice.
-First they replaced the connector - no succes.
-Second time the replaced the motherboard, and everything was solved.
So imho it's the mainboard of some machines, i still wonder if it's a factory problem or a 'fried' chip of some kind after a bad charging procedure? Bad USB car charger of some kind?

HD2 Won't Work without the Charger :-/

Hey guys, my Hd2 won't work without the charger. The moment I take the cable out, it dies. I've tried charging it and for some reason it goes from 0% to 100% in a matter of minutes (which denotes that it's not actually charging). I've tried everything except going back to stock. I even cut one of my usb cables in half and tried charging the battery by attaching the red and black wires to the metal parts. What should I do?
Silencer96 said:
Hey guys, my Hd2 won't work without the charger. The moment I take the cable out, it dies. I've tried charging it and for some reason it goes from 0% to 100% in a matter of minutes (which denotes that it's not actually charging). I've tried everything except going back to stock. I even cut one of my usb cables in half and tried charging the battery by attaching the red and black wires to the metal parts. What should I do?
Click to expand...
Click to collapse
It seems to me like a dying battery...
bib*oops said:
It seems to me like a dying battery...
Click to expand...
Click to collapse
Thanks for the heads up. I just bought myself a cheap $3 generic battery off of eBay I just hope it's the battery and not the charging port itself.
Just in case, check the battery pins on the phone as they can be easily bent and result in your problem!

Reseating the battery did wonder for my battery life and charging issues on my 8.4

As many other of you, I have had problems with my battery charging properly. Often it would only charge up to 40-60%. Usually, I could fix this problem by running my battery down to 2%, then turning it off and plugging in the charger. Most of the time it would charge up to 100% then, save for a few times it didn't.
Still, I was getting annoyed by this, so I figured I might as well try pulling the battery out and plugging it back in. And, wow, did it fix some issues for me. So far, my battery is charging itself back to 100% without having the pull the plug multiple times. But maybe even better, it gave me a completely renewed battery life.
Before reseating the battery, I was getting about 5-7.5 hours battery life depending on what I was doing. After reseating, I now have about 10.5 hours of battery life. That's a HUGE difference. The attached images below show my latest 10.5 hour battery life with about 9% left, which should give me another 45 minutes to an hour if I needed it. Power saving was on during the entire time, screen brightness varied between 10-25%. Mostly I internetted, reddited, used Feedly, 1.5 hour of youtube viewing. I put the tablet in airplane mode for one night to see if it gave any significant battery life, but it only took about 1% during the night it wasn't in airplane mode. Sync with all my accounts was also on the entire time. Android version is stock, rooted, though I only use Xposed and Greenify.
If it stays like this, this will be the first time I am truely happy with my battery life.
To reseat the battery, I used this Youtube video:
www.youtube.com/watch?v=lEVFYQksmxM
If you want to try it, which I certainly recommend, you can try pulling out only the battery cable. I wasn't able to, I didn't want to put too much stress on the cabling, so I unscrewed the entire battery. It's not stuck with adhesive anyway. I do however recommend strongly that you use this guide to pull of the back cover, instead of opening at the screen:
www.youtube.com/watch?v=f5vTAeWyq7I
Can't link to the video's themselves, I am not allowed to do that yet. I believe this video was made by someone on XDA? Please give a shout out, so I can give you proper credits for it. Becareful when opening the device when near the USB port and the audio jack. The plastic connecting to the tablet itself seems very fragile in those places.
Thanks for sharing.
Same experience, I did it two days ago after noticing that it stopped charging at 96%. With the same usage I should have needed to recharge it by now but I still have 52% battery left with my usual 3 hours of screen on over 48 hours. So it doubled the battery life .
I did remove only the connector, I used a plastic coated paper clip that I passed under the cables to pop it off. The cables are strongly attached enough to remove the connector without any issue.
I think I'll keep this tablet longer than I thought, the processor and screen being future-proof.
I'll try it and post my results...
Anybody else tried that or has a clue why that happened?
reseating battery helped, now won't charge from USB
I too have been frustrated with charging and battery issues on my Tab Pro 8.4. So I tried the battery reseating trick.
I can now report, that it has helped with battery life. But a new issue came up.
Previously, I could not reliable charge the tablet on AC power ( USB cable connected to the AC charger ). It would not charge to 100%. The solution was to charge from an USB port on my Mac. This would charge to 100%.
After the battery reseat trick, the tablet does not charge over USB, but charges nicely to 100% on AC. And the battery life is much better.
Right now, I am trying if the battery is even charging over USB while off. The little dots are scrolling on the screen, seems something thinks the charging is ongoing, but I need more time to see if the charge level has moved up.
Any ideas ? Thanks, Paul.
I had also proceed to that "surgery". Battery life seems better but it could be placebo. Im not sure.
But 3 times in a row charging went from 15, 20, 35 % straight to 100.
To the usb charging issue mentioned, due to the bad contactivity of the battery cable before tha fix, it may displayed false reading of charging level. The normal changing time from a standard usb port is at least 4 to 5 times longer than the original charger (2000mA vs 500mA max). So you have to wait longer for a usb charging level change.
About the USB charging issue - the device does charge when off, while plugged into an USB port on a Mac. When the device is ON, the battery icon shows a red cross, and the info in the Battery windows of settings is showing Not Charging. My guess is that this is some restriction on the firmware, that does not attempt to charge the device while having a data link on the USB. I will try to obtain a charging-only cable, to see if that fixes the issue.
Paul.
Just checked for myself, but my cable that came with the tablet doesn't work either. Tried it with different cables too and the same red icon pops up in the battery. I honestly never tried charging it myself via my PC before I reseated the battery. Maybe it has something to do with the fact a PC USB 2.0 port can only supply 500mAh, which isn't enough for the tablet (while it is turned on)?
I m also suffering from this charging problem...i wish to reseat bt i have a question...after opening the back cover does it reinsert normally or i need glue..?
I tried first to remove the back cover. Some of the clips chipped off. So I removed the screen. No damage removing the screen. Just be patient to unclip all spots all around the screen
kensheen said:
I m also suffering from this charging problem...i wish to reseat bt i have a question...after opening the back cover does it reinsert normally or i need glue..?
Click to expand...
Click to collapse
There is some adhesive between the cover and the tablet itself, but mostly there are a lot of small plastic pins that lock in place. I did not add any new adhesive, and I honestly can't tell the difference.
paokaras45 said:
I tried first to remove the back cover. Some of the clips chipped off. So I removed the screen. No damage removing the screen. Just be patient to unclip all spots all around the screen
Click to expand...
Click to collapse
Oh that doesn't sound good. Is the back cover still fine now with the chipped pins? I personally didn't try via the screen since I saw an image in a different thread of someone getting bubbles of some kind in one of his screen corners.
The fit close to the ir port is not as tight as before. I don't mind because i use a case. The screen came off without any issues.
PS: after power on the tablet for the first time, i forgot to set time and date. It didnt connect to any secure site or servive (play store, youtube, facebook). So keep in mind to set them correctly
paokaras45 said:
The fit close to the ir port is not as tight as before. I don't mind because i use a case. The screen came off without any issues.
PS: after power on the tablet for the first time, i forgot to set time and date. It didnt connect to any secure site or servive (play store, youtube, facebook). So keep in mind to set them correctly
Click to expand...
Click to collapse
So, after some days, how do you note the battery? Improved indeed?
favero_ said:
So, after some days, how do you note the battery? Improved indeed?
Click to expand...
Click to collapse
I think yes. I now get full charge every time (5 times from various percentages) and screen on time increased by an hour approximately. Maybe its from the better changing cycles.
With medium usage (tapatalk 20%, greader 30%, facebook 20%, youtube 30%) no gaming at all i get about 6 or more s.o.t. at 20% brightness most of the time.
Right now i am at 30% left with 5 hours sot, unpluged 13 hours ago.
I reseated my battery..now my tab pro showed it is full charged after long time. Previously it didnt cross 29% even i charge it for whole day..battery is better now. I opened the back cover by ruler and reseated only the battery connection as shown by video...
thankx sicron.
are you guys sure there is nothing wrong with your charger, you should get a usb amp reader (like $5 on ebay) and make sure the tablet is pulling 1800~ mA when it charges from 50% or less (rate will drop when it gets close to full)
Also always use the Samsung cable that came with the tablet since it has high quality Copper wires that can carry the correct 2A current , if you use another cable it is most-likely only rated for 500 mA (Computer USB current) and will either
1. Not carry enough current to properly charge the tablet.
2. start charging ok but as the cable heats up (or contact pins on the usb parts) it will start to degrade
I suggest only using the Samsung wall charger, and never Ipad , iphone, computer or other brand chargers to charge it.
otyg said:
are you guys sure there is nothing wrong with your charger, you should get a usb amp reader (like $5 on ebay) and make sure the tablet is pulling 1800~ mA when it charges from 50% or less (rate will drop when it gets close to full)
Also always use the Samsung cable that came with the tablet since it has high quality Copper wires that can carry the correct 2A current , if you use another cable it is most-likely only rated for 500 mA (Computer USB current) and will either
1. Not carry enough current to properly charge the tablet.
2. start charging ok but as the cable heats up (or contact pins on the usb parts) it will start to degrade
I suggest only using the Samsung wall charger, and never Ipad , iphone, computer or other brand chargers to charge it.
Click to expand...
Click to collapse
It is definitely not the charger, otherwise the problem wouldn't be fixed by reseating the battery. Which happens to work for a lot of people. I personally tried a Nexus 7 2012 2A charger both with the original cable and with my Samsung cable. I also tried the OnePlus One charger (2A or 2.1A, not sure) with both cables and it didn't charge. It seems to me it is some kind of calibration issue, that somehow gets fixed by unplugging the battery and plugging it in again.
Sicron said:
It is definitely not the charger, otherwise the problem wouldn't be fixed by reseating the battery. Which happens to work for a lot of people. I personally tried a Nexus 7 2012 2A charger both with the original cable and with my Samsung cable. I also tried the OnePlus One charger (2A or 2.1A, not sure) with both cables and it didn't charge. It seems to me it is some kind of calibration issue, that somehow gets fixed by unplugging the battery and plugging it in again.
Click to expand...
Click to collapse
Yeah strange, maybe some-kind of a bad connection on the battery clip where on the assembly line it didn't get fully pressed down or just comes loose overtime, and maybe the battery wasn't reporting back stats correctly (if you look in logcat you can see it constantly is getting updates from the battery circuitry)
would be interesting to see what logcat reports on a device with this problem (might need root logcat)
IE mine shows this.
D/BatteryService( 944): level:61, scale:100, status:3, health:2, present:true, voltage: 3836, temperature: 248, technology: Li-ion, AC powered:false, USB powered:false, Wireless powered:false, icon:17303447, invalid charger:0, online:1, current avg:-784, charge type:0, power sharing:false
Click to expand...
Click to collapse
X
xx
I completed the battery reseating and can say it definitely has improved the battery charging and performance. Prior to I was having the charging stopping issue at various percentages. Since the reseating it now charges 100% and the battery performance has definitely increased by at least 20%. Would recommend to do this if your having battery issues. Take off the back cover as it is very easy. Just need to go slow around the perimeter. It is help on by small clips and glue. Use a slow and forceful prying with a credit card and the back cover will slowly become undone. Area around the charging port has a little extra glue so may take a little more force.

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