[Xperia Z1 Q&A, Help & Troubleshooting] finalfantasy:
Hello,

Been a while since i was on XDA because i chose a good enough rom and never had to back again. I've used android for quite a while. My first android phone ever was a HTC Tattoo. This is like my 7th android phone now and i've modded every phone i ever had with a custom rom because the stock ones were full of stupid additions that just took up space for no reason. I've encountered many issues along the way and solved most of em. But here is another issue i just cannot fix no matter how hard i try.

I have a regular Xperia Z1 c6903 and i've used it for quite a while. Played Hearthstone alot on it even tho it did make the phone feel like a radiator. After time, the back glass started loosening up bit by bit. I think it has something to do with the glue loosening because of the constant heat of me playing Hearthstone. Didn't worry about it too much, until i started having these weird battery issues. The phone started dying on weird percentages, jumping from 14% to instant 0% and shutdown. I've encountered this issue before on other phones and it just happened to be a software issue where reinstalling the rom or installing another would fix the issue.

I tried this on this phone multiple times. Worked once. Then it came back. Tried even installing the stock firmware again so its in factory settings even tho i didnt relock the bootloader. Issue didnt get fixed. Tried switching to a kitkat stock firmware, didnt work. Tried installing another custom firmware, didnt work. So i reverted back to the rom that i found worked best for me despite the battery issues, DStrikerZ1 Kai.

The issue just got worse. It started dying on 30% and just went higher and higher each time. Then it kept dying on like 64% or so each time. At this point, every time i charged it it just jumped from 1% to like 54% in less than a minute. I charged it each time while it was off. I didnt turn it on to then charge it.

2 days ago, it died on exactly 84%. It's at this point i was looking into options because i cant have a phone that charges only to what it THINKS it 100% and then stops charging to just die then at 84% while discharging per percentage at a normal rate.

Next day, the battery and the back glass i ordered arrived. There was one issue tho which i realized much later, the battery i got was too fat. Mostly on the lower part of it. I was able to plug the battery in but i couldnt put on the back glass entirely because the battery is too fat. So i put it on as much as i could and just taped it around with white tape around the phone but above and below the screen so it doesnt block it. Also cut out what was needed with a scalpel so sound and camera arent blocked. While trying to replace the battery, i think i may have accidentally pulled a little bit on the back camera so it popped out just a tiny bit. Pushed it back in and it looks fine. Although now i can't launch my camera app and it crashes each time. Dont use it much anyway so not a big loss for me.

Here is the result of this new battery:

It works. Although i still have the battery percentage issues. But it charges a bit differently now and discharges differently. NOT CORRECTLY STILL. 1 hour ago i put on charging because it died outside again at a wrong percentage. Was like 60%, dont remember. I turn it on again and while its turning itself on, i plug it into the charger. It says 52%. So i launch Pokemon GO and run it for about a minute. Then it dies again. Then i turn it on again and NOW its on 1% and it starts charging what i THINK is normally. 20 minutes later after charging, i check it and its on 11%. Then the really weird thing happens. As im watching the percentage go up, it goes from 11% to 15% in a matter of seconds as if it went up by 1% per second. It's been 1 hour now and its on 27%. One thing that i think is just a coincidence but i have no idea, it died like 6 times only while Pokemon GO was running.

I seriously don't know what to do. I don't know if the issue isnt with the battery but the phone itself, or if it just needs a bit calibration. But you can't use a phone reliably if you cant know when it needs recharging. I can't buy a new phone for at least 2 more months. I have a Galaxy S2 somewhere that i can use in the meantime but its cracked a bit and the top left part of the glass just above the display is just gone. Taped over it to keep it covered. But it'll get the job done in the meantime.

I know i should have made a book about this. I did write alot. But i feel people will be able the help me if they know exactly every detail.

What does the community of XDA have to say about what i should do or try?

Thank you in advance!