VPN Battery Drain Solved - Xiaomi Mi Mix 2 Questions & Answers

I posted this in the General forum last week and decided to also share with my fellow Mix users. I've been using it for about 6 days now and it works perfectly.
"After several years of trying different free and paid vpn's that won't drain my battery excessively I think I may have found the solution.
I have lifetime subscriptions for VPN Unlimited and Windscribe with Proton and Tunnelbear as my free ones. All drain the battery quite heavily. For the past 72 hours I've been using the Strongswan Ikev2 client to run Windscribe and it's been excellent. Zero abnormal battery drain. It's the first time I'm using Ikev2 and it's much more efficient than OpnVpn in terms of speed, battery and auto-reconnecting. The downside is that it only uses one port and can therefore be blocked by the isp or government, so if you live in a restrictive country then you're out of luck.
The screenshot below are my actual battery stats since I took the phone off the charger. This is despite Strongswan shown to be using about 35% of the battery.
I presume any Ikev2 enabled vpn will work just as well so you don't need to use Windscribe and I'm not endorsing them over any other vpn. Anyway give it a try and let us know how it works for you."

Related

Battery Drain Problem - Solved??

There has been a lot of posts here about battery drain with varying theories about why many people experience this.
My Dopod D810's battery usually lasts me a day before it finally complains and shuts down around 11:00pm.
During this time I had been using Exchange activesync to push email to my device. However we do have a Blackberry enterprise server at work so I decided to remove exchange and install Blackberry in order to see what differences there were.
Imagine my surprise when I found with Blackberry rather than Exchange that my battery is still at 70% when it normally would have been switching off. It has been like this now for over a week. My usage has been normal during that time and there have been no other changes made,
Has anyone else experienced this? I would be interested to hear from anyone who has. Perhaps this is an explanation?
Cheers
Bruce
"Imagine my surprise when I found with Blackberry rather than Exchange that my battery is still at 70% when it normally would have been switching off."
That's probably 'cos of how MS's Push Mail works, although it only transfers data when really needed, it also pings the server at an interval( default each 8 mins ) just to check if the connection is still alive( if not it'll re-establish it ).
BB doesn't need to( but it does need to be supported by the carrier ).
At least that's what I read.
just a quick post to say that I think the battery drain - for me - is worse when I changed ROM, I use push email for my old ROM and the drain was normally 3 days now with this ROM I find I charge every day. I am doing nothing different from the previous ROM
I have tried several WM6 ROMs by now, and all seem to have the same problem: I get a MASSIVE battery drain, when I use ActiveSync Pushmail over UMTS connection. Also the device and battery gets warm, if not to say HOT.
I tried already different Radio ROMs 1.4x and 1.50.08, still the same.
I would lose about 20% capacity per hour.
However, if I configure the phone to use only GSM bands, there is almost no battery drain.
Any ideas on this? I use UMTS quite a lot for browsing/email and would need pushmail as well.
esackbauer said:
I have tried several WM6 ROMs by now, and all seem to have the same problem: I get a MASSIVE battery drain, when I use ActiveSync Pushmail over UMTS connection. Also the device and battery gets warm, if not to say HOT.
I tried already different Radio ROMs 1.4x and 1.50.08, still the same.
I would lose about 20% capacity per hour.
Click to expand...
Click to collapse
Same issue here.
I live in the USA and last month I went to Spain and there I was using Movistar as my cell provider with a Movistar simcard everything was working great (UMTS,Activesync Pushmail,videocall etc...) but man like you said,once the phone was switching from GSM to 3G the device starts craving battery like you wouldn´t believe plus the temperature of the battery was kind of outrageous.
So I switched to GSM and everything back to normal in Spain and in the USA,I don´t know what to say other than 3G and Pushmail drain a lot.
I have noticed this with every rom.
Bye
dta1974 said:
Same issue here.
I live in the USA and last month I went to Spain and there I was using Movistar as my cell provider with a Movistar simcard everything was working great (UMTS,Activesync Pushmail,videocall etc...) but man like you said,once the phone was switching from GSM to 3G the device starts craving battery like you wouldn´t believe plus the temperature of the battery was kind of outrageous.
So I switched to GSM and everything back to normal in Spain and in the USA,I don´t know what to say other than 3G and Pushmail drain a lot.
I have noticed this with every rom.
Bye
Click to expand...
Click to collapse
Same story here. I live in the Netherlands with the Orange version of this phone and no matter which rom I use, it always drains rapidly when i used a 3g connection. So after I browsed with a 3g connection I switch back to GSM for push mail etc and to stop the draining.

Juice Defender

Anyone using this app? Is it doing anything good for the battery time? I have heard different, some people are saying it consumes more battery then it saves...
I only used the free version myself, but found it a bit of a waste as all it really seemed to do was enable data connection every X minutes (X being an interval of your choice) for a short period of time to check mails and what not. I suppose this would be a good thing for someone who wants emails/facebook/etc to be synced every now and then without worrying about manually enabling the data traffic.
Like I said I only tried free version though, I might've missed some good function or the paid version's functionality makes it worth while *shrug*
I tried it on my Nexus One, the Free version, based upon recommendations I read in a magazine. I cannot tell you whether or not it helped. Over time it tells how the battery life of the device has increased (for example: it may diplay 2.14) but I didn't notice a doubling of battery life (longevity). If it helped out at all I didn't notice much.
Since then I've moved on to the Galaxy S which doesn't get great battery life either, but it does seem to do better than the Nexus One.
El Mono
I've used the free and actually bought the ultimate edition too.
I used it on my HTC Desire and that increased my batterytime from around 15-20 hour to around 30-35 hours with my normal use...
I haven't installed the app on my SGS since it has great batterylife with the JM2 firmware update... but maybe I should give a go
I used the settings where I disabled data as long as screen was off. That meant the phone would use 1-3 seconds to get dataconnection when turning screen on. Worked great. In the paid version there's another option where you can change CPU frequency when you've rooted your phone.
in your scenario where you gained so much battery time, did you have auto sync and 3G on all the time prior to installing juice defender?

48 hours of Battery life and still 45% left!!!

Hi Everyone,
I thought id share the amazing battery life im having, ive had it going for 48 hours so far and still got 45% of my battery still left, ill tell you all my set up and i wish you can get the same.
Installed LeeDroids rom (1.9a) which is absolutely amazing i must say, i love it.
Got the new radio 32.44.00.32u_5.09.05.30_2.
SetCPU running and have the normal standby on the phone at 642mhz and 245mhz when the screen is off.
I also have a task killer on set to kill most apps when the screen turns off and i have read about androids memory management but it makes me feel better when i run it and i personally think it helps.
Finally, and possibly the most important is an app called AutoKiller that interacts with androids internal memory management system and i have that set to ultimate.
I think thats it, and i have been using the phone averagely, and have turned off wifi and mobile internet and only use it when i need it.
Good luck everyone, hope this is helpful in someway.
It was interesting to read until you said this
pp84 said:
have turned off wifi and mobile internet and only use it when i need it.
Click to expand...
Click to collapse
I personally refuse to turn off internet (wifi or mobile, same thing) on my SMARTPHONE. Cmon, that is why I bought it, because of the internet, and the fun things to do on it. If I use it for calls/sms only, I would have gotten something much cheaper.
Anyway, with hard usage my battery lasts for like 20 hours, and that is enough for me. I don't mind connecting it to a charger before I fall asleep, and disconnecting it when I wake up. Still I use the 1GHz CPU and the options the phone has fully
pp84 said:
... have turned off wifi and mobile internet and only use it when i need it.
Click to expand...
Click to collapse
ljesh said:
I personally refuse to turn off internet (wifi or mobile, same thing) on my SMARTPHONE. Cmon, that is why I bought it...
Click to expand...
Click to collapse
I'll have to agree with ljesh on this. If you deprive your smartphone of internet access, you've just turned it into a feature-phone.
But, I think you should turn off WiFi when you're not using it. That's just the smart thing to do...
Is there a battery of the same size with a higher capacity?
Sent from my HTC Desire using XDA App
No, there isin't.
Just a quick update i ended up getting 63 hours out of one charge!
And i dont need to read what the weather is every 5 minutes thats the reason i dont generally keep mobile internet on... I just look up at the sky it tells me exactly what i need to know!
Well, I have tried this and wow - what a difference, lol.
I am mostly around WiFi connections all day, so just use that instead for all my syncs. Mobile internet is used when I am out of range for short periods of time.
Thanks for the tip - works wonders.
[sarcasm]
1. Turn on Airplane mode all the time and don't wake the device from standby. According to the specs, the device will last up to 340 hours (ie, over 2 weeks).
2. Leave the device completely off. It will be months before your battery completely drains.
[/sarcasm]
Don't mind me, I'm just joking around.
But seriously, it would be interesting to know the battery life of a device set to your specifications but with mobile internet on. Turning it off, just seems like cheating, similar to how CPU overclock enthusiasts achieve crazy clockspeeds with liquid nitrogen cooling. Sure, you achieved your milestone, but is that really how the device is intended to be used?
ohyeahar said:
[sarcasm]
1. Turn on Airplane mode all the time and don't wake the device from standby. According to the specs, the device will last up to 340 hours (ie, over 2 weeks).
2. Leave the device completely off. It will be months before your battery completely drains.
[/sarcasm]
Don't mind me, I'm just joking around.
But seriously, it would be interesting to know the battery life of a device set to your specifications but with mobile internet on. Turning it off, just seems like cheating, similar to how CPU overclock enthusiasts achieve crazy clockspeeds with liquid nitrogen cooling. Sure, you achieved your milestone, but is that really how the device is intended to be used?
Click to expand...
Click to collapse
Why do you count network off as cheating. Why should it be on if you don't need it?
I am leaving network off most of the time, just switch it on when I want to surf or update my calendar/emails. Use Wifi whenever available. And SetCPU to minimize clock speed while the display is off.
Most email come from Softbank Japan thru a MMS type email application. Its a push mail system and you do not need to have network on for receiving it.
With this settings I get up to 24h, depending on who long I travel and read ebooks.
Not my intention to sound antagonistic. "Cheating" may be too strong of a word. Here's what I'm trying to say.
Obviously, it's up to the user to decide how to use the device. But what's also obvious is that the device cannot be fully utilized without an always-on connectivity.
Without an always-on connectivity, a lot of the widgets and applications instantly become useless or crippled.
Sure, not everyone uses widgets or applications that require always-on connectivity. But I'm willing to wager that a majority of the Desire user community utilizes such widgets and applications; so turning off mobile internet is just not an option for these people.
ohyeahar said:
Not my intention to sound antagonistic. "Cheating" may be too strong of a word. Here's what I'm trying to say.
Obviously, it's up to the user to decide how to use the device. But what's also obvious is that the device cannot be fully utilized without an always-on connectivity.
Without an always-on connectivity, a lot of the widgets and applications instantly become useless or crippled.
Sure, not everyone uses widgets or applications that require always-on connectivity. But I'm willing to wager that a majority of the Desire user community utilizes such widgets and applications; so turning off mobile internet is just not an option for these people.
Click to expand...
Click to collapse
I tend to agree.
I need the network to always be on, and so leave it so - though sometimes, I will put the phone into airplane mode overnight if I remember. Generally though I don't as I usually charge overnight anyway.
On Sunday night though, I'd charged the phone during the day and so didn't charge overnight. I used the phone quite heavily during the day, and in the evening watched about 3 hours worth of DivX video via RockPlayer. My phone complained of less than 15% charge after 26 hours, which to me was quite impressive given my usage, and I don't use *any* tweaks such as SetCPU or a task killers (which are placebos anyway).
Personally, if I can get a full day from my phone I'm happy - and I can do that with the Desire without having to do anything.
Regards,
Dave

[Q] juice defender

Aight so I downloaded juice defender free last night cause I've been having battery heat problems.....but it shuts off my 3g connection when the screen goes off and I can't seem to find the setting for it....I use Pandora radio so this is a bit of a *****.....any solutions?
Sent from my Incredible using XDA App
Thats pretty much the only thing Juice Defender free does that can save your battery, that and turning off wifi too. So if you disable it why even have Juice Defender installed? I too tried the free version for about 2 days and could never get my wifi or 3g to come back on so I uninstalled it and thanked god I hadn't paid $10 for the paid version. IMO its crap.
Juice defender is terrible. It kills your battery. well thats my experience...
Sent from my ADR6300 using XDA Premium App
I was using it mainly because I wanted to see if it would help my temperature problems but it didn't....it just effed me up more
Sent from my Incredible using XDA App
Terrible app. If it does anything then it kills the battery... Brings android system to the top of the usage list, because it shuts off 3g and wifi..
Sent from my ADR6300 using XDA Premium App
Screen is still the top on my usage.
I have the paid version. It gives you the ability to lock items (like Pandora) "on" for data usage. Then, they don't get killed.
I had amazing battery life with it on my D1. Jury is still out on the Incredible. I'm still working through ROMs and Kernels.
I use it also. It has this new feature that you can tell it your local wireless and leave it alone. Problem is it doesn't work. Keeps shutting off my wireless when I'm using it! Very frustrating.
Also their developer is not very accessible. They want all issues solved through their forums. I hate that...The best software also has an accessible support system.
The one good thing I will say about it is it has the potential for taking over all aspects of managing your phone. A one stop shop. Just not there yet...
I used to use Juice Defender with 2.1 and found that it helped battery life. However, with Froyo, it just made the phone unstable. (It'd just sponaneously reboot sitting on my hip 2-3 times a day.) After uninstalling all is well.
A co-orker's Sprint phone had the same flakyness until he uninstalled JD.
Wild! I have never had random reboots. But, we all know how unique these devices are... even between the same model.
With warm twopointtwo, it doesn't seem to be turning on all the time... or warm is somehow killing it.
dbaps - are you still in 'training' for the wifi? It takes JD a couple of times to fully learn your location (based off of towers) and remember that as a wifi location. Check under the settings...it'll tell you what percentage of training it has completed.
Those of you who say its crap obviously dont have it configured correctly. I bought "ultimate juice" and when you go into the custom or aggressive profiles you can tweak everything until your heart's content! It still seems to shut off data when Im streaming stuff with slacker and connected to wifi, even though I tell it not to. Other than that it definitely will give you a few extra hours if you spend the time to configure it properly.
Terrible app!
brando56894 said:
Those of you who say its crap obviously dont have it configured correctly. I bought "ultimate juice" and when you go into the custom or aggressive profiles you can tweak everything until your heart's content! It still seems to shut off data when Im streaming stuff with slacker and connected to wifi, even though I tell it not to. Other than that it definitely will give you a few extra hours if you spend the time to configure it properly.
Click to expand...
Click to collapse
There is no correct configuration to this app. That is why it is called "Custom". The reason it is CRAP is due to the reason you list as a problem among numerous other features that don't work.
Seriously, why have an option to automatically tweak CPU values if the option doesn't work with 99% of the kernels on the market, which also includes the STOCK kernel?
Yeah, it's a GREAT app!
pronghornrunner said:
Wild! I have never had random reboots. But, we all know how unique these devices are... even between the same model.
Click to expand...
Click to collapse
True. For clarity's sake, I was using JD free so I don't know if any other version would have been better or worse. It's possible that the complex WiFi network at work (multiple APs per floor with a centralized controller) confused things.
My phone is a droid incredible, the co-worker's is a Sprint Epic. Different symptoms - he had phone lockups requiring battery removal to recover. Rooted, re-ROMed and still crashing until Juice Defender removed.
If you use Ultimate Juice and set up things correctly. This programs rocks.
It will turn on and off your data (3g and wifi) when you need it (according to the conditions you set).
It takes a little bit of reading and intuition, trial and error, and PATIENCE.
Use it for more than 1 day. Your phone usage varies day to day.
Again, read the text, THINK, and setup the conditions according to the way YOU need them.
I get at least 20-40% more battery depending on how I use my phone. I rarely charge mid-day any more and I can count on my phone having battery throughout the most useful hours of the day.
On light to moderate use, I get at least 14-18 hours. Just for fun, I once tested it and got about 29 hours before the battery hit 5%. That's with a little texting and a few phone calls. I use the stock, standard capacity battery as well.
SET IT UP RIGHT!
I've had no issues with JD running on 2.2.
Set on Aggressive. Only annoying thing is that I get the error notification icon for Weatherbug Elite every two hours because data is shut off.
First - I've got the most recent JD installed. The old one was kind of lame. People have made some good points, but there is a lot of incorrect information in this thread...
It works. If you are *NOT* actively using your phone, it will save your battery by disabling communication you don't need. I can go to bed at 80%, wake up 7 hours later at 79%, maybe 78% at the worst case.
If you are using your phone, it's quite nice - it comes on quickly - and manages my network well (at home, uses WiFi, elsewhere - 3G).
It's not $10.
My wife is using the free version and has had zero problems.
I've never tried aggressive, but maybe I will.
I cant comment on the CPU stuff - never used that.
Scott
I've never had a problem either. I'm running Skyraider 3.5 with incredikernal 2.6.32.27. I have the free version set on advanced. The best battery lift I've gotten with light phone use, texting, data syncing and browsing was 72 hours. Same use with stock rom and kernal my best was about 18 hours before I needed to charge. I know everyone is different, but that's my experience.
spatton said:
First - I've got the most recent JD installed. The old one was kind of lame. People have made some good points, but there is a lot of incorrect information in this thread...
It works. If you are *NOT* actively using your phone, it will save your battery by disabling communication you don't need. I can go to bed at 80%, wake up 7 hours later at 79%, maybe 78% at the worst case.
If you are using your phone, it's quite nice - it comes on quickly - and manages my network well (at home, uses WiFi, elsewhere - 3G).
It's not $10.
My wife is using the free version and has had zero problems.
I've never tried aggressive, but maybe I will.
I cant comment on the CPU stuff - never used that.
Scott
Click to expand...
Click to collapse
When I tried it back last Fall the paid version was indeed $10, its now down to $5. Which I still believe is way too much for this app. My 3g would not turn back on no mater what I did and yes I read the tutorials many times and had it set properly.
spatton said:
First - I've got the most recent JD installed. The old one was kind of lame. People have made some good points, but there is a lot of incorrect information in this thread...
It works.
Click to expand...
Click to collapse
Perhaps for you. For me (stock ROM on my dinc) it made the phone unusable. Calling that observation "crap" or "lame" is convenient, but doesn't reflect the experience that I had (and which others had).
Again, with Android 2.1 JD did help a great deal. With 2.2, it didn't help battery life but made the phone crash. This was not a positive trade-off.
With froyo, I can go two days on my incredible between charges given light usage without it. Why put up with the instability just to get a few extra hours of battery life?
For example, I'm currently at 62% after 15 hours since unplugged with moderate usage of the phone, with WiFi and Bluetooth enabled. I could just turn off Bluetooth except when I'm in the car, but I doubt it'd buy me more than a few extra hours of useful life.
Juice defender has caused me multiple problems. Was the source of phantom call drops and sleep of death!! As soon ad I removed it, problems solved.
Sent from my ADR6300 using XDA App
Also corrupted two SD cards, losing all my files, because of sleeps and reboot caused by JD. Does not play well with Z and HD roms at all. Works at first but soon became the cause of a lot of problems.
Sent from my ADR6300 using XDA App

S20 Exynos - Very poor battery <3hrs SOT

Hey there
Purchased a new S20 Exynos 3 weeks ago. Since then battery life has been awful... even below what users report on the forum (4-6 hours SOT ranges).
I barely get 3.5 hours at best with minimal usage in a day: whatsapp, calls, emails, social media - NO gaming, gps, video calls...
This has been the same under OneUI 2.5 or now 3.0 for the past week
I have tried everything:
debloated a lot of stuff
wiped the phone with factory reset, did not restore with smart switch
60hz only, dark mode
location off, all device or wifi scanning features off
lots of apps in sleep and deep sleep lists
took the phone to samsung service to verify battery was functioning normally
I'm sharing screenshots of GSAM and BBS - please help me understand what is going on, i'm not able to make sense of the stats
I really want to love this new phone.... but 3hrs a day for a work phone + samsung service being a complete waste of time is not helping me...
Many, many thanks for your help
Why is it showing LTE2?
Maybe put your sim in slot 1?
Are you in a poor reception area? Your phone signals are good but still can't be trusted.
I have 2 sim cards in the phone. The one I'm using now is in slot 2
I even switched off sim 1 in sim cards manager because it was draining battery. I need to switch it back on anytime I want to receive SMS or call
Yet another feature that made me buy the phone and I end up deactivating....
Any other idea where I should deep dive? Do you see any app draining the battery or weird wakelock?
I need to get at least 6hrs SOT on basic usage
Any other idea where I should deep dive? Do you see any app draining the battery or weird wakelock?
I need to get at least 6hrs SOT on basic usage
jules75555 said:
Any other idea where I should deep dive? Do you see any app draining the battery or weird wakelock?
I need to get at least 6hrs SOT on basic usage
Click to expand...
Click to collapse
That's poor SOT even for a Exynos device. Based on the info you've shared it would seem your phone is defective. If it was purchased locally you should ask the seller to exchange it. If a full factory reset doesn't help I don't know of any other settings or modifications you haven't already tried.
At this point I can only suggest you to try using only single sim via slot 1 and observe the difference.
Also can you post gsam signal graph like mine.View attachment 5155689
My device is S20+ on 3.0
60HZ, WQHD enabled and I'm getting 10H SOT.
Thanks guys for your help. Really appreciate it
Samsung doesn't want to replace the device. They have tested it for 24 hours in idle and told me the standby battery drain is normal.
This is insane. I've never seen so poor customer service, I miss apple so bad...
I've switched my sim to slot 1, that's a bummer since I'll need to play around with sims every time I travel...
My reception should be good as well.
Guys do you have by any chance a contact at Samsung top management to share in DM?
I'm dealing with India customer service this is appaling.... [email protected] supposed to be case manager what a joke
I've been fighting with them for 3 weeks it is driving me insane.
I'm talking to a lawyer today to open a law suit, probably a class action law suit, against Samsung advertising high performance but selling poor quality handsets equiped with Exynos chipset
jules75555 said:
Guys do you have by any chance a contact at Samsung top management to share in DM?
I'm dealing with India customer service this is appaling.... [email protected] supposed to be case manager what a joke
I've been fighting with them for 3 weeks it is driving me insane.
I'm talking to a lawyer today to open a law suit, probably a class action law suit, against Samsung advertising high performance but selling poor quality handsets equiped with Exynos chipset
Click to expand...
Click to collapse
No doubt you're level of frustration is rightfully extreme but I'm pretty sure pursuing a class action lawsuit to remedy the issue isn't your best option. I'm not an attorney but have years of experience as a lawfirm administrator. Not too many attorneys are capable enough or willing to invest the required time, resources and money to initiate that action. Having your attorney contact Samsung in writing may be the best option if he/she will do so at a reasonable cost.
Yes that's actually the plan
Given Samsung's commitment to customer satisfaction I doubt anything will come out of it
Will take further actions when necessary
In the meantime if anybody still have ideas on how to investigate further / solve the issue with my phone (assuming it's not hardware issue and Samsung hiding it from me).... happy to look into it
Latest developments:
Samsung "top" customer support team has arrange a pick up to take the phone to service again tomorrow
If they tell me everything is fine again i'm gonna lose my **** - nothing is fine with a 3 hours battery life phone that cost me $700
agentsandy007 said:
My device is S20+ on 3.0
60HZ, WQHD enabled and I'm getting 10H SOT.
Click to expand...
Click to collapse
How the havk you achieved that???
Are we talking exynos or snapdragon?
i've never seen anything like samsung customer support in my life
5 hours on the phone with them in 2 days, 2 back and forths to service center...
They are still telling me that 3 hours screen on time is perfectly normal on my handset and refuse any refund or replacement
"we have done 1 hour of youtube and the battery dropped by 35% because youtube is hardcore. See that's good"
wait... what?
plus i've never opened youtube on my phone what's this test about
Pure insanity
I'm going ahead with opening a class action law suit. DM if interested in joining
it will be shared on social media as well and widely online
zolee_ said:
How the havk you achieved that???
Are we talking exynos or snapdragon?
Click to expand...
Click to collapse
Exynos.
No gaming, Just browsing and little bit of youtube.
Maybe bcoz of indoor usage. Brightness is 40-45%
Hey guys why instead of being proud of managing to tweak a $700 phone to make it usable
we just tackled the core issue and stopped buying crappy exynos samsung and make them understand they cannot fool customers
i start to understand why you keep buying if this is just a game to you
jules75555 said:
Hey guys why instead of being proud of managing to tweak a $700 phone to make it usable
we just tackled the core issue and stopped buying crappy exynos samsung and make them understand they cannot fool customers
i start to understand why you keep buying if this is just a game to you
Click to expand...
Click to collapse
Well, Indians voted with wallet.
Due to poor sales in India, S20+ came down to 700$, bcoz of ezorbitant prices on top of selling Ecynos crap.
I have an Exynos S20 and have been having similar battery life issues since FW BTIB and BTJ3, I think I have finally tracked it down to some weird 5GHz Wi-Fi problem with FWs after the August update.
Someone mentioned putting the phone on Airplane overnight which I've never done, so I did after fully charging it and I was thrilled to see the battery dropped by only a few % in 10hrs which was great. In the morning I switched Airplane off back at my desk which is close to the WAP and the battery life seemed really good.
After a week or so of checking with Airplane On/Off and switching between 2.4GHz and 5GHz, I suspect that if the 5GHz signal isn't strong enough the phone is trying very hard to maintain the connection. Looking at your battery stats it shows Wi-Fi 86% battery so this could indicate a similar issue.
Switching to 2.4GHz seems to have greatly helped my battery life. Right now the battery has dropped 38% in 42h13m, with 42m of calls and 21m of SOT. Accubattery still thinks my full charge SOT is 2h30m but that's calculated on 10 sessions and I'm hoping that it might improve over the next few weeks. Still, it's far short of what Accubattery reported about a month after buying the phone (over 10hrs).
If I desperately need 5GHz speed I can just manually switch it, do the uploads, then switch it back to 2.4GHz.
I've sold the S20 and going back to iphone or pixel
worst phone i've ever had in hands
Legal action against Samsung is ongoing - their customer service has been appaling, including talking to their top management in India through my lawyer.
All in all a very bad phone, poor company, 0% customer centricity

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