Hello,
I have upgraded my Imate PDA2k ROM Helmi_BA_WM2k5_AKU3.5_v1.4.CF2 R2 by baniaczek for about a month now. It has been working perfectly fine with no much issues on Wifi and other stuff. But since last one week i see my battery runs out within 3 hours and each time i had to re-charge the same. Even though the usage is really minimal. ( May be 2 or three calls and no real PDA usage). Also i feel the device is heated up most of the time. Are there any diagnostic tools for battery ?. .. Is this caused by any program running continously.
Any suggestions to find out the battery problem.
It is probably a running program or some activated interface (GPRS, IrDA, Bluetooth, Wi-Fi). Make sure they are all deactivated.
Thanks for the reply. I have tried disabling BT/WiFi / GPS ( even deleted GPS Connections ). Still the battery runs only for 3 to 4 hours. How can i figure out which of the applications might be causing the problem ??..... ( As i stated in my previous post things were fine two weeks back ). I can not figure out!... Can this be a hardware problem ?. Should i try flashing the ROM again ?.
Any suggestions will be of great help.
Thanks.
Is the backlight always on?
No. I think its a hardware problem. I flashed the ROM again and still the battery was draining really fast. Anyways i will change the battery now and check.
regards
Perhaps the battery is getting life expired. THe most common indication of expiring battery is that it stats taking longer to charge and gets drained faster...Try replacing the battery..
Your right but it shouldn't happen in so great leap. You said that you flashed another ROM. Try doing master reset and leave the device in factory-fresh state - do not restore anything from backup imediately. If it is fine then, it is a software problem. If it is not, try turning on the flight mode for determining if it is GSM related. I'm afraid that a new battery won't solve anything.
?
i'm guessing that your IR is turned on since you did not state it on your post earlier!
IR eats your battery like pacman does.
bara_too said:
IR eats your battery like pacman does.
Click to expand...
Click to collapse
It would still be interesting to have battery diagnostics software. Does anyone know of such a package?
http://www.spbsoftwarehouse.com/products/benchmark/batterytests.html?en
might be useful for testing.. could potentially try different screen brightness and speeds to get a comparison. I will say that I used to only get 1 day from my old OEM battery.. got one of the e-bay special 2500mAh and now it easily gets 3 days with the same usage pattern as before..
After a long time again a re-post on this. Well my problems seems to be not getting over. I flashed the PDA2k to factory state and still the battery was draining. Then next obvious thing was to replace the battery. Now i have a brand new battery and reflashed again to factory state and my fears are coming true... still the battery drains in 3 hours... what next guys ?.
cbark2 said:
After a long time again a re-post on this. Well my problems seems to be not getting over. I flashed the PDA2k to factory state and still the battery was draining. Then next obvious thing was to replace the battery. Now i have a brand new battery and reflashed again to factory state and my fears are coming true... still the battery drains in 3 hours... what next guys ?.
Click to expand...
Click to collapse
have you checked ur infra red setting? make sure its OFF! i think, it is turned on as default after flashing! or maybe your charger is defective! try someones charger!
IR disabling has not helped in the past. But i tried again but no much use. The equipment is heated up during normal usage time. Is there any thing more i can try before my BA becomes a history. ( BTW. the repair center refused take anything other than the screen changes and battery replacements. !!.. )
Any one having any idea how to reset the bios ?. I think my battery problems are related to trying out the Trial Version of Pocket Hack Master to overclock the PDA. I have uninstalled it long time back and may even have performed three to four times ROM updates but may not have reset the software's overclocking settings back .. ?!!...
BTW. The service center argued out that the any ROM updates other than official Imate ROM will void the warrantee and twice they returned without repair and attributed the the problem of heating to ROM updates... ( without even checking!! ...
I faced the same problem when attempted to upgrade my Harrier. I agree, that there must be an error somewhere in the device BIOS that cannot be that easily reflashed. Unfortunately, I could not find any solution and had to replace the useless phone that drained the battery within 4-5 hrs.
Yes the over clocking eatsup the battery as well as causes heating up the device. So better dactivate the over clocking..
Related
<BUMP> Is there a WM5 ROM which doesn't exibit the “dies @ 40% power” bug? This really causes a lot of problems, including losing the mail account settings. I am constantly having to remember to cradle my device throughout the day so it can make it. Also WiFi is basically unusable if the battery is below 50%. The device will just turn off. I am using 1.4 vanilla. I am grateful to Helmi and the community at large for all the great work on these devices. It seems it would be good to fix this issue before all the ROMs are gone.
TIA,
sbl
[EDIT] _TB_TB_ nailed it. Bad battery. Posting this over WiFi w/only 20% battery left. Yeah!
Your battery may be broken (one or two of its cells...). My battery did get broken... (Yes, the phone kept turning off at 40%)
got exactly the same, but mine dies at 58% [email protected]#
You really think it's a broken battery or could this be a software bug.
grtx
nijhof
That depends. Turn the phone on, run camera app. Let it stay on. Wait till the phone dies. Turn it on again. Run camera. Let it stay on. Repeat the procedure until the phone fails to pass the "stripes" screen. This should drain the battery down to its "real" zero. You will know if its a software bug or a battery issue.
RE: bad battery
Thanks, _TB_TB_. I am trying a different battery. Will also try the camera test with each. I'll post results in a day or two.
sbl
Thanks, _TB_TB_
You were right. Guess that explains why ALL the WM5 ROM's I tried had the same issue. :^)
New battery = Happy user
Thanks again,
sbl
No problem
I simply had the same issue (battery damaged by the car charger...).
HI
My wife has my old Touch Diamond2. She complains that after charging it overnight, the battery shows as FULL, but within a few hours it is dsicharged.
1. Does the battery need replacing
2. How can I check to confirm it is the battery and not the charger/phone.
regards
Max
Try the battery saving tricks mentioned in this thread
Advanced Tricks for Saving Battery
Hope this helps you,
Senax
Thanks Senax for the nice link.. That is very nice thread to read and understand
thanks
I think the phone possibly has a hardware fault.
It strange, because if I take the simm out the phone keeps alomost full charge for the whole day!!
Not sure if its worth fixing.
mpathan said:
I think the phone possibly has a hardware fault.
It strange, because if I take the simm out the phone keeps alomost full charge for the whole day!!
Not sure if its worth fixing.
Click to expand...
Click to collapse
May be you can check what all kind of networks are working/used when SIM is in? Also make the network selection Manual instead of AUTO and see the difference.
thanks.
mpathan said:
HI
My wife has my old Touch Diamond2. She complains that after charging it overnight, the battery shows as FULL, but within a few hours it is dsicharged.
1. Does the battery need replacing
2. How can I check to confirm it is the battery and not the charger/phone.
regards
Max
Click to expand...
Click to collapse
I had the same problem...
recently I did two changes...
I Flashed the last radio
I Flashed the last Photon UX Room.
And then I fixed the battery problem...
why? I don´t know
lfallasm...
Thanks lfallasm and TD2IN
I dont want to flash the phone cos I have software (TomTOm) on the phone for which I no longer have the original CD to re-install. Also I have never flashed before.
I will try the network selection suggestion.
cheers
Network selection is already set to Manual.
I noticed something very STRANGE today.
I thought it maybe due to the signal in the new house we moved to, so I took the phone to work. Made one call and it went dead. Tried to start the phone, but battery to weak.
I took the sim out. started the phone without the sim and HEY PRESTO, battery is 75% full!!
Any ideas whats going on??
You should really flash it first, and if it fails you have a faulty phone. But flash it with HTC stock Rom, because you will lose waranty if you use anything else.
Its out of warranty. (My wife uses this phone now)
Would a FACTORY reset achieve the same as flashing with a HTC stock rom??
regards
FIXED.
The battery was faulty.
Apparently is had developed a slight "buldge" in the middle. Probably due to over heating.
Bought a new battery and all seems well.
£8 battery saved me buying a wildfire S for the wife.
Hi, I would like to know the best way to measure my battery health. For about a month my battery starts to drain fast. I know my phone is already old and battery don't handle the same charge, but I have recharged the phone all night long and in ten minutes using wifi to just update some apps the battery just gone.
It is just ridiculous as I don't use any different configuration.
To be more specific, my phone configurations are:
- Cyanogenmod 7.2 by vo-1 (31/06/2012) deodexed by me;
- Firekernel Unnoficial OC (22/07/2012), CPU governor: smartassv2, max 787, min 245;
- Adrenaline Engine 4.2b;
One more thing. I was facing the same problem with blackhawk kernel.
I just think a battery can't die a sudden.
Could anyone help me with this?
Floydroider said:
Hi, I would like to know the best way to measure my battery health. For about a month my battery starts to drain fast. I know my phone is already old and battery don't handle the same charge, but I have recharged the phone all night long and in ten minutes using wifi to just update some apps the battery just gone.
It is just ridiculous as I don't use any different configuration.
To be more specific, my phone configurations are:
- Cyanogenmod 7.2 by vo-1 (31/06/2012) deodexed by me;
- Firekernel Unnoficial OC (22/07/2012), CPU governor: smartassv2, max 787, min 245;
- Adrenaline Engine 4.2b;
One more thing. I was facing the same problem with blackhawk kernel.
I just think a battery can't die a sudden.
Could anyone help me with this?
Click to expand...
Click to collapse
There are a few things that can be causing this, but the first thing that you can try is to wipe your battery stats using "BatteryCalibration" app. After flashing a few things, it's best to do this. I had the same thing happen after flashing my third ROM or so.
After that, it basically comes down to the apps and widgets that you have running. Shut them off with a task manager so they don't end up draining your battery, but it might not be that either....
The only other thing that I can think of is that I heard in another thread (I really wish that I could find it again ) that the ace has a motherboard fault that causes it to drain faster than usual.
Other than that, all I can say is that the Ace generally has poor battery life, and it really does suck, but I don't really know how much more you can do. You could try flashing a stock-light ROM and see if it does the same thing (wipe battery stats too). But I would say is that you should try wiping the stats and see if anything changes.... Other than that.... I`m out. Hopefully it helps, and if it doesn`t, you might need to take it in (Service Center or wherever you bought the phone).
Maybe try searching in other threads (as it is a common problem) but besides that, goodluck :fingers-crossed:
thatdude02 said:
There are a few things that can be causing this, but the first thing that you can try is to wipe your battery stats using "BatteryCalibration" app. After flashing a few things, it's best to do this. I had the same thing happen after flashing my third ROM or so.
Click to expand...
Click to collapse
I forgot to mention but I already did the calibration, using the app and manually to see if I could get different results.
I even tried to force a better charge, charging the phone off, waiting till 100%, unplugging and recharging, till the phone gets 100% again.
Ace's battery isn't good, but a month ago my phone was holding 12-14 hours without charge, using wifi a lot, that's why I think something is wrong.
Well, I'm flashing the original stock rom to see if get some change.
Thanks about the motherboard information, this is new for me :good:
Gonna see tomorrow if the battery holds better with the original stock ROM.
Thanks again!
Wiping the battery stats is a myth. All it does it clear the battery usage screen!
Android has a built in tool which can try to check the health of your battery.
Open the dialer
type *#*#4636#*#*
then go to battery information
Look at battery health.
Feedback
Just to give a feedback, my battery was really damaged. I bought a new one, stock because I didn't find other, and the phone now easily last a day, even using wifi a lot.
But that's not the only reason why I posting here again, I want to share how my old battery is. Comparing with new one, I realized that the old battery had stuffed something about 5 mm
If you pay attention, you'll see the small deformation.
Don't know yet what could have cause this, but I think it was heat and bad recharges...
Thanks for the help :good:
Floydroider said:
Just to give a feedback, my battery was really damaged. I bought a new one, stock because I didn't find other, and the phone now easily last a day, even using wifi a lot.
But that's not the only reason why I posting here again, I want to share how my old battery is. Comparing with new one, I realized that the old battery had stuffed something about 5 mm
If you pay attention, you'll see the small deformation.
Don't know yet what could have cause this, but I think it was heat and bad recharges...
Thanks for the help :good:
Click to expand...
Click to collapse
I'd recommend you to use SetCPU to prevent this on your new battery. Set up a profile with sound notification when it hits around 40degree, and underclock it at the same time.
I faced a similar problem. Battery was hardly six months old when it died but it was my fault. I was running a wi-fi tether and continuously charging it for about two days. :silly:
Got a new one under warranty. Been a year with the new battery and just recently facing problems with it. 3G just sucks the life out of it.
OK I just got 3g on my phone (yay for promotional 6gb plans!). But yeah, the 3g definitely kills my battery. I used to be able to go two or three days with very little use. Now I can only go one day even with standby with my 3g enabled. As long as I can put my phone on to charge before it dies, its all good to me
Finally with my 3g going, I understand everyone else's pain with the battery life haha
Sent from my GT-S5830 using xda premium
Dear fellow enthusiasts,
since a couple of days, I'm experiencing sudden device crashes when I'm using it for network related activities, mostly over the 3G network (for example, I'm typing out a message on the Facebook app, and the phone goes into boot loop or simply "shuts down"). I had only recently upgraded to the 4th beta build for the Cyanogenmod 9, hosted here on XDA , so I suspected it would be related to this. However, upon reinstalling both the previous version and the new mod from absolute scratch, the issues remained the same.
I had noticed that after each crash, the battery charge displayed as very low (2-6%), whereas I'm certain the charge should be much higher. So I thought it might be some sort of corrupt battery-cache issue or something.
However, and here's my actual question, I just now noticed that my I9001 battery is slightly bulged, on both ends. This bulge starts just above the white printed SAMSUNG lettering, and it ends just bellow the QR code. I can't for the life of me remember if or not this is normal, so could someone please confirm this for me?
And while we're at it, could a faulty battery affect my performance as such (making my phone crash etc)?
Thank you very much in advance for any help or information anyone could give me.
I confirm, battery is slightly bulged in those places but it looks like a production "thing" to me (I hope I understood what you mean), no need to worry, I guess. Looks like corrupted battery stats, try to wipe it via recovery (phone fully charged, plugged in - then wipe battery stats). After that, i recommend one or two full battery discharge - charge cycles. I've noticed hovever, that after each full factory reset I have for about 20% better battery drain, than after flashing many ROMs, kernels and updates (cache and dalvik cache wipe only), my battery drain is getting pretty annoying. Try a full factory reset, if wiping battery stats didn't work.
Jacol82 said:
I confirm, battery is slightly bulged in those places but it looks like a production "thing" to me (I hope I understood what you mean), no need to worry, I guess. Looks like corrupted battery stats, try to wipe it via recovery (phone fully charged, plugged in - then wipe battery stats). After that, i recommend one or two full battery discharge - charge cycles. I've noticed hovever, that after each full factory reset I have for about 20% better battery drain, than after flashing many ROMs, kernels and updates (cache and dalvik cache wipe only), my battery drain is getting pretty annoying. Try a full factory reset, if wiping battery stats didn't work.
Click to expand...
Click to collapse
Thanks a lot for the confirmation Jacol !
Anyone else who can confirm a bulging of the 1650mAh battery for the I9001? I'd like a large enough sample group if possible.
also happened to me
solved this problem by buying another battery...
Blumdum said:
also happened to me
solved this problem by buying another battery...
Click to expand...
Click to collapse
Thanks Blumdum, do you mean you also had your phone crash on you?
yes
i charged the battery
after some time my phone turned off
i restarted it and i had only 2% battery left
then i took a look on the battery stats and there was a huge drop from like 95% to 2%
Blumdum said:
yes
i charged the battery
after some time my phone turned off
i restarted it and i had only 2% battery left
then i took a look on the battery stats and there was a huge drop from like 95% to 2%
Click to expand...
Click to collapse
Thanks Blumdum, I've ordered a new battery, it should arrive within a couple of days, I'll confirm if this fixes the issue.
Same thing happened to me,i will order momax 1700mah
Sent from my GT-I9000 using xda premium
Hey people,
I received my new battery last night, I went for an Akku Powercell of 1800mAh. Charged overnight, been using it all day, no problems whatsoever to be found.
Thanks again for the assistance!
Swollen battery = defective!
I'm sorry but I've encountered this as well in the past. Normally working phone with sudden shut downs and huge drops in battery charge. It took me a long time to convince me that the battery was defective. So maybe this would save you guys some time in finding this out!
Verstuurd van mijn GT-I9001
Hey, try to use cm10 for a few days, if the problem gone then your battery is alright, and please stop using beta roms, regret are so buggy and slow: )
Sent from my GT-I9000 using xda premium
In general healthy batteries DO NOT swell. Buy a new one before it explodes or starts leaking...
Hey all, just because people keep on posting, the battery was indeed defective, the roms were absolutely fine and the new battery is performing marvellously!
Thanks again for all the input !
Jacol82 said:
I confirm, battery is slightly bulged in those places but it looks like a production "thing" to me (I hope I understood what you mean), no need to worry, I guess. Looks like corrupted battery stats, try to wipe it via recovery (phone fully charged, plugged in - then wipe battery stats). After that, i recommend one or two full battery discharge - charge cycles. I've noticed hovever, that after each full factory reset I have for about 20% better battery drain, than after flashing many ROMs, kernels and updates (cache and dalvik cache wipe only), my battery drain is getting pretty annoying. Try a full factory reset, if wiping battery stats didn't work.
Click to expand...
Click to collapse
I have the exact same problem with my sgs i9000-gt.
My phone turn off itself ( no restarts, its a complete shutdown ).
First, I thought i might be a problem of GB 2.3.6 rom i was using, so i updated to latest cm10 but the problem persists.
If you restart the phone after the shutdown than i shuts down within a minute again.
Also the battery drain is pretty fast. I notice the same bulges on the battery as reported in this post.
I did the battery calibration thing as some people suggested, but that does not solves the problem. However, it got rid of the fast changes in battery status which was happening before. Like when you restart after shutdown at 80% battery status, it will show like 2% battery left and after few minutes of charging it would boost back to 80-90%.
But still the battery drain is pretty fast. It discharges from 98% (i cannot get to 100% charge, 98% is highest) to 50 % within an hour, just idling.
And when i am around 40% or so and if i recieve some message and try to open a app it shuts down again.
I have ordered a new battery just in case. Will update here if that improves things for me. But i will still like advice on which is a more economical kernel and rom for i9000-gt? Some people suggested slim bean + semaphore on some forums but i would like to have some more concrete advice before i change more things without knowing the source of the problem. I would be grateful if someone can suggest what is best to use with some details( version, etc). Thanks for that in advance.
I thank you all (users + developers) for all the useful information provided on this forum, i learnt a lot although i still am not able to fix my problem . And I hope someone might come up with a concrete solution for this problem. If there is a solution which I might have missed, I thank you in advance again and hope you will be kind enough to point me in the right direction.
cheers
update: the phone stays alright if u dont do anything on it, but the moment you being doing something on it other than playing with system settings, like run some app, especially something that uses network / wifi, it shuts down. none of this happens though while its plugged in. it happens only when its on battery.
problems fixed so far after replacing the battery
maxffm said:
I have the exact same problem with my sgs i9000-gt.
My phone turn off itself ( no restarts, its a complete shutdown ).
First, I thought i might be a problem of GB 2.3.6 rom i was using, so i updated to latest cm10 but the problem persists.
If you restart the phone after the shutdown than i shuts down within a minute again.
Also the battery drain is pretty fast. I notice the same bulges on the battery as reported in this post.
I did the battery calibration thing as some people suggested, but that does not solves the problem. However, it got rid of the fast changes in battery status which was happening before. Like when you restart after shutdown at 80% battery status, it will show like 2% battery left and after few minutes of charging it would boost back to 80-90%.
But still the battery drain is pretty fast. It discharges from 98% (i cannot get to 100% charge, 98% is highest) to 50 % within an hour, just idling.
And when i am around 40% or so and if i recieve some message and try to open a app it shuts down again.
I have ordered a new battery just in case. Will update here if that improves things for me. But i will still like advice on which is a more economical kernel and rom for i9000-gt? Some people suggested slim bean + semaphore on some forums but i would like to have some more concrete advice before i change more things without knowing the source of the problem. I would be grateful if someone can suggest what is best to use with some details( version, etc). Thanks for that in advance.
I thank you all (users + developers) for all the useful information provided on this forum, i learnt a lot although i still am not able to fix my problem . And I hope someone might come up with a concrete solution for this problem. If there is a solution which I might have missed, I thank you in advance again and hope you will be kind enough to point me in the right direction.
cheers
update: the phone stays alright if u dont do anything on it, but the moment you being doing something on it other than playing with system settings, like run some app, especially something that uses network / wifi, it shuts down. none of this happens though while its plugged in. it happens only when its on battery.
Click to expand...
Click to collapse
I flashed back to stock samsung rom ( from the value pack) and the problem persisted.
today my new battery arrived and all the forementioned problem seems to be gone with the new battery, my phone seems to be working fine for last 5 hrs without any restarts or crazy battery drain. will test the same with custom roms again. As of now it only seems that problem was the battery.
Cheers.
thanks to the forum and developers
Hello everyone,
I have been using a Xperia Z1 for around last 6 months and updated to Lollipop 5.1.1 two months ago. Everything was fine until last week when my phone started to get affected by the battery bug.
The phone works fine and the battery gets discharged in leaps. For example, when I use the phone from 100%, it goes down in the usual way, let's say for 1 hour usage it drops up to 90% which is quite normal. But, when lock the screen and keep it idle for sometime and when I take it back, the battery has dropped a leap, usually by 10-15%.
Yesterday, I was using the phone normally and kept it idle for the entire night and battery has been dropped only from 85% to 79% without stamina mode. That's good. However, when I restarted the phone in the morning, the battery suddenly dropped to 18%. :crying:
I tried calibrating the battery, charging/discharging cycles and removing batterystats.bin. But, the issue is still here.
I think my phone has been affected by the famous Xperia battery bug in Lollipop which means that my battery is damaged. But, before replacing the battery is there anything else that I could do to overcome the issue. Any suggestions are greatly appreciated.
+ My phone is rooted on stock 5.1.1 (14.6.A.0.368) with XZDualRecovery and locked bootloader. If I repair the phone with PCC will it cause any harm or bricking since because of the customer recovery?
Claiming warranty is out of option since the phone has been rooted and flashed with custom recovery.
I don't know why people call it a lollipop bug. There will be a time a battery reaches its end of live. That's what has hit you right now. Your descripte symptoms are from a dying battery. I have seen some dying battery's from me or friends. The battery was holding the charge normally and suddenly no more.
Replace it and all should be fine again.
motorazrv3 said:
I don't know why people call it a lollipop bug. There will be a time a battery reaches its end of live. That's what has hit you right now. Your descripte symptoms are from a dying battery. I have seen some dying battery's from me or friends. The battery was holding the charge normally and suddenly no more.
Replace it and all should be fine again.
Click to expand...
Click to collapse
But, can this happen on a phone that is just 7 months old? Thats what makes me to think that this could be a bug.
I have the same issue, but mine drops to 0% and after waiting some time and booting it the percentage is back up. I have my phone for 2 years now, and the problem appeared in Lollipop also.
aquaboy11 said:
I have the same issue, but mine drops to 0% and after waiting some time and booting it the percentage is back up. I have my phone for 2 years now, and the problem appeared in Lollipop also.
Click to expand...
Click to collapse
It's okay for a 2 year old phone as Lithium batteries wear out with time. In my case, it's kinda disappointing...
So, after searching the entire Internet, I can understand that this is a common issue with Xperia Z1 and Z1 compact and replacing the battery seems to be the only possible solution. I searched EBay for a battery but couldn't choose a good quality one. Can someone guide me on this please?
UnlimitedBB said:
So, after searching the entire Internet, I can understand that this is a common issue with Xperia Z1 and Z1 compact and replacing the battery seems to be the only possible solution. I searched EBay for a battery but couldn't choose a good quality one. Can someone guide me on this please?
Click to expand...
Click to collapse
Your battery is definitely dying and it has nothing to do with roms. Get a battery that the seller claims to be OEM. That's your best bet...
optimumpro said:
Your battery is definitely dying and it has nothing to do with roms. Get a battery that the seller claims to be OEM. That's your best bet...
Click to expand...
Click to collapse
Thanks for the tip. So, I searched for an OEM battery and ordered it along with some tools required for the disassembling. I will keep posted once I replace the battery.
UnlimitedBB said:
Thanks for the tip. So, I searched for an OEM battery and ordered it along with some tools required for the disassembling. I will keep posted once I replace the battery.
Click to expand...
Click to collapse
Don't think that it will resolve your problem.
I changed my internal battery about one month ago and when two weeks passed I started to experiment the same bug ? again
It's not only hardware problem, it also software problem, I believe.
D_Vovan_238 said:
Don't think that it will resolve your problem.
I changed my internal battery about one month ago and when two weeks passed I started to experiment the same bug again
It's not only hardware problem, it also software problem, I believe.
Click to expand...
Click to collapse
You are correct becouse I experience som drops in the range of 5-20% in less than a minute and once 30%. All the time while the phone was in standby mode except once where it did it right in my face (10%). My battery status is reported being fine. I also forced shutdown the phone as per the calibration method for non-rooted phones. Though I did notice dalvik cache wasn't rebuilt and so there is no way to have it refreshed manually except system updates which does this.
Anyway I did remove some apps and did some changes and after this I have not had any sudden drop for weeks. Two of the apps where Truecaller and Facebook official app. Will check though if it was a third one to. I believe one of these or both where playing havok. Especially the Facebook app as it takes liberties I find suspicious, is buggy, can crash the kernel (any app that can do that is doing shady work IMO) and had the addition of a "Video Player" service that was running permanently after you launch the FB app once. I instead use Metal for Facebook now. Pretty much same experience, only 10MB RAM used instead of 90MB and no batter y drain either or any other problem. So in short I believe one of these where the culprits and since many use the FB app that might be the one playing badly with Sony Z1 system.
And If you use Adguard also check if there are apps getting high ratio of ads blocked (or analytics data blocked). Might be some dont get proccessed right in the battery system due to it calculating it wrong. Google Frameworks, Google Contacts, Play Services, Mobilestorage Checker and a few more I disabled the ad filtering for. Though this did not change the battery drop problem previously. It only went away when I uninstalled named apps above.