Remove All Ads from XDA

Xperia Z2 Back Panel & Battery Replacement Experience

142 posts
Thanks Meter: 24
By unni_kmr, Senior Member on 30th October 2016, 12:29 AM
Post Reply Email Thread
I thought I would share my experiences / lessons learned while I tried to replace my Z2's (D6503) back panel and battery.

Recently, the back panel started coming off on its own. I thought it was because of weakened adhesive. So, I ordered a back panel from Witrigs along with the adhesive (part 1 & 2, links below). I also got a guitar pick (part 3), suction mount (part 4) and a spudger (part 5) from Witrigs. It took about 3 weeks to get the parts.

Before removing the panel, I watched these videos: video 1, video 2.
I used a heat gun that I borrowed from work. Looks like a hair drier will also work. In video 2, you can see that the panel breaks when he was removing it. I think he didn't heat it enough. I used the heat gun for around 1 minute. The phone became really (almost unbearably) hot to touch. Then I slid in the pick and the panel came out easily in probably 2 minutes. The difficult part was in removing the glue residue. I spent almost 30 minutes doing that. I also used a alcohol hand sanitizer and cotton swabs for cleaning the glue residue. I am not exactly sure if the hand sanitizer helped or not.

Then I applied the panel and adhesive. Unfortunately, the adhesive didn't stick. I realized its because the battery was pushing the panel. The battery had expanded on both sides (the outer cover was bloated). So, I ordered a battery from Amazon (part 6). Since Witrigs was taking time to deliver, I also ordered the adhesive from Amazon (part 7). Both arrived in less than 5 days. I cleaned the original cover, put the new adhesive and battery and it fitted properly. But now there was a new problem. Camera became very blurred. Before putting in the panel this time, I had run the cotton swab on the camera glass on the panel (inside and outside). I didn't touch the actual camera lens. I don't know if that caused the blurriness or if it was the heat from the gun, the blurriness is not going away. I tried rubbing toothpaste (someone recommended it in XDA), that didn't help either. The panel I got from Witrigs didn't have any blurriness. Unfortunately, while trying to remove the adhesive residue from it, I scratched the black paint on the inside. Now if you place it in front of light, you can see the other side (its a very small scratch, but I also messed up another part mentioned later). This made me think if the Witrigs one was fake, but same thing happened to the original one a few minutes later. So, while cleaning the residue, don't put too much pressure and don't use anything sharp.

Another thing I learned was not to direct the heat gun on the inside of the panel. I did that with the Witrigs one while trying to remove the adhesive residue. There is a plastic part that sits in front of the flash LED. The heat caused part of it to melt.

So, now I have ordered a new set of panels, NFC and adhesive from EPartsSupply (parts 8, 9 & 10) since Witrigs is out of stock. Waiting for them to be delivered.

Also, before putting the panel in, make sure that the phone turns on (to ensure that the battery connector is properly in place). Also make sure that plastic part in front of the flash LED is in there. Its glued to the panel, but not that hard to remove. So it may accidentally come off.

Parts Used
Note: Please don't blindly buy these just because I listed them here. Chances are they may turn bad after a few weeks. I am particularly concerned about the battery and whether the adhesive will hold.
  • Part 1: Back panel from Witrigs
    See attachments Back Panel - Inside/Outside.jpg. The one on the left is original.
    I couldn't feel any physical difference between the original and the Witrigs one. I am not sure if the glass has the same property as the original.
    It also comes with NFC and the adhesive. You just need to peel of the cover and place it on the phone.
  • Part 2: Adhesive from Witrigs
  • Part 3: Guitar pick
  • Part 4: Suction mount
  • Part 5: Spudger
  • Part 6: Z2 replacement battery
    See attachments Battery Front/Back.jpg. The one on the bottom is the original.
    The new one looked identical. I couldn't say for sure if it was fake. I will use it for a few days and see if I notice any difference and update here.
  • Part 7: Adhesive from Amazon
    I am not sure how long these will hold. I recommend getting at least 2 adhesives because you may not be able to align it properly the first time. The method I have adopted is this:
    • Remove the protective covering meant for the panel side.
    • Align the tape on the phone carefully (note that the phone side cover is still present)
    • Place the panel on the tape and push it in.
    • Lift the panel. Remove the phone side protective covering.
    • Push the panel in.
    • Apply heat for a few seconds on all sides. (Note: I am not sure if this will strengthen the bond). Push firmly.
  • Part 8: EPartsSupply back panel
    This doesn't have NFC.
  • Part 9: EPartsSupply NFC antenna
    Based on video 1, it looks like its possible to remove the NFC antenna from original panel. When I tried to remove it from the Witrigs one, I ended up tearing it. So, I don't want to take a chance.
  • Part 10: EPartsSupply adhesive
Attached Thumbnails
Click image for larger version

Name:	Back Panel - Inside.jpg
Views:	348
Size:	241.0 KB
ID:	3919896   Click image for larger version

Name:	Back Panel - Outside.jpg
Views:	338
Size:	271.2 KB
ID:	3919899   Click image for larger version

Name:	Battery-Front.jpg
Views:	346
Size:	252.9 KB
ID:	3919900   Click image for larger version

Name:	Battery-Rear.jpg
Views:	332
Size:	253.3 KB
ID:	3919901  
The Following 2 Users Say Thank You to unni_kmr For This Useful Post: [ View ] Gift unni_kmr Ad-Free
30th October 2016, 05:17 PM |#2  
Thanks Meter: 11
What about waterproof ?

Can you test pressure sensor ?
31st October 2016, 07:09 AM |#3  
Senior Member
Thanks Meter: 50
How much did everything cost you?
And is the phone fixed?

Can you post some shots?
2nd November 2016, 02:47 AM |#4  
OP Senior Member
Thanks Meter: 24
Originally Posted by aotaotaot99

What about waterproof ?

Can you test pressure sensor ?

Its extremely unlikely it will be water proof. The Witrigs guy himself said "its very difficult to make it waterproof again" here.
I assume you are talking about the barometer. I just tried with with two baarometer apps from Play Store. Both were showing 992.85/993 hPa.
2nd November 2016, 03:00 AM |#5  
OP Senior Member
Thanks Meter: 24
Originally Posted by MJ999

And is the phone fixed?

As of now, everything looks good.

But I wouldn't consider it as fixed since the camera is blurry now. I have ordered a back panel from ePartsSupply. Once I get it, I will try to replace it again. Also, I am not 100% confident about the battery.
AccuBattery app shows 2441 mAh capacity instead of 3200 mAh. Its been just 2 days. I remember somebody mentioning in the Amazon comments that it doesn't hold charge like the original. I will see for 1 more week. The concern I have is if this is fake, I don't want it to end up exploding. The battery in Witrigs website is $43.58 where as the one I bought from Amazon was $6.98 plus shipping. Also, I don't know for how long the adhesive will hold.

Honestly, after seeing the battery level today, I am leaning heavily towards buying a new phone.
I keep the phone next to me while sleeping. I don't want it to catch fire.

Originally Posted by MJ999

How much did everything cost you?

Witrigs Purchases
  • OEM Back Cover Sticker for Sony Xperia Z2 (2) : $5.98
  • OEM Back Cover for Sony Xperia Z2 Black: $13.99
  • Plastic Guitar Pick 0.6mm Dark Blue: $1.59
  • 3.5cm Suction Cup Transparent: $0.80
  • Best Opening Tools Spudger For Cell Phone: $1.56

Amazon Purchases
  • Battery: $10.98
  • Back & front adhesives (3): $23.66 (they come in pair)

ePartSupply Purchases
  • Back panel (3): $10.92
  • Adhesive (3): $5.70
  • NFC antenna (3): $8.88
  • Shipping: $16.70 (they didn't have any other shipping options)
    I decided to buy 3 of each in case I have to change the battery again or if the adhesive becomes loose again. Also, the shipping cost is high.

Originally Posted by MJ999

Can you post some shots?

Damaged NFC antenna in the Witrigs panel when I tried to remove it:

Scratch on the Witrigs panel (bottom right corner):

Phone after repair:

Not sure why I can't post pictures in post. I have also attached them here.
Attached Thumbnails
Click image for larger version

Name:	Battery Status.png
Views:	106
Size:	152.8 KB
ID:	3923384   Click image for larger version

Name:	After Repair-1.jpg
Views:	114
Size:	239.2 KB
ID:	3923385   Click image for larger version

Name:	After Repair-2.jpg
Views:	110
Size:	239.3 KB
ID:	3923386   Click image for larger version

Name:	Damaged NFC Antenna in Replacement Panel.jpg
Views:	102
Size:	229.1 KB
ID:	3923387   Click image for larger version

Name:	Scratched Replacement Panel.jpg
Views:	96
Size:	243.5 KB
ID:	3923388  
Post Reply Subscribe to Thread

back panel replacement, battery replacement

Guest Quick Reply (no urls or BBcode)
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes