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Does turning on System Power Saving slow down the performance?

I have noticed when my phone's battery was getting low (without SYSTEM POWER SAVING turned on), zooming into pictures did very poorly.
It worked fine again after charging. So does the Note have an automatic performance cut to conserve battery even without turning on any Power Saving from the device.
Does turning on System Power Saving slow down the performance?
If so, will turning it off automatically bring back the Note's performance to normal? If it had turned off some other things like animation, will it turn it on again once I uncheck System Power Saving?
Or is there something else I have to do to bring back the speed that was lost due to power saving?

I notice the camera fails to function at low battery too.

How to tackle my Z3C battery drain issues?? I'm fed up

I'm fed up a bit for my Z3 C battery life. This is my second query regarding battery life.
Does keeping Mobile data and Whatsapp running ON even in standby mode drains the battery??
I usually get just 1 or 2 whatsapp messages in an hour or two.
My phone settings-
Always turned off my wifi/ bt/ nfc/ gps/ location tracking/ autoupdates etc. & everything you can think and suggest.
Use only stock custom wallpaper and no live stuff. No widgets. No sd card inserted. With only two hoemscreen wih just 2 shortcuts on each screen.
Have disabled apps which I dont use.
Stopped services of apps which are no longer needed.
No auto sync enabled for any app.
Display brightness is at 30% all times.
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I use only these 3rd party apps-
Status bar mini
Network monitor mini
Whatsapp
Greenify
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My daily Z3 routine-
At night while going to sleep I turn off mobile data, turn on airplane mode and turn on stamina mode. (12:30am - 9:30am)
When I wake up the next day battery is down by 4-5%.
During day, phone runs in normal mode without any stamina activated. (10am - 12:30am)
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The Low-battery mode seems useless as it does literally nothing.
Also, as soon as the battery is 100% charged and if I use phone for even 5 mins the battery immediately drops to 99%, so is this normal??
Even if I capture 5 photos in stock auto mode the battery drops by 1% or 2.
I reboot my phone once a week or in 10 days or when need arises.
Ram utilised is always 1gb. But I dont feel any slowness for any app or my phone usage.
But again I dont watch any movies or play games fearing my battery will deplete in no time.
I use 2G/edge network as 3G isnt available for my operator in the city I reside.
Charging the phone to 100% from 14% takes 3 to 3.5 hours.
I have already repaired my phone using Sony pc companion and also did a factory reset as well but this issue has been haunting me every now and then.
Sony center says the battery doesnt need any replacement as its still healthy and so is my device.
The phones service menu also reports battery status as Good.
I dont know when is Lollipop gonna be out for Z3 but I fear updating to Lollipop as it may pose more issues than doing any good apart from usual gui tweaks & updates.
But just wish that lollipop brings in more relief to Z3 batteries.

It would be better if you also posted some screenshots with your battery usage.
Does keeping Mobile data and Whatsapp running ON even in standby mode drains the battery??
I usually get just 1 or 2 whatsapp messages in an hour or two.
Click to expand...
Click to collapse
EVERYTHING drains battery, literally everything. If your volume is on max it also drains more then when your volume is very low. (Just an example)
There is a controversy when it comes to WiFi vs 3G which drains more.
In the end I think that it depends on the coverage. For me 3G/4G drains my battery less then my WiFi due to the poor WiFi reception.
That your phone loses about 5% over night really isn't THAT bad, what I do before I go to bed is "Close all" to close all the aps running in the background (It won't terminate WhatsApp's service) and I let Greenify hibernate all programs that I selected.
There was also a talk about charging your phone to 100% vs 99% the first percentage drains fast for everyone so that's why it's maybe better to only charge it till 99%.
With screenshots of your battery usage we could help you more, but as far as I can see there is nothing wrong with your battery.
If you're rooted, try BetterBatteryStats to pinpoint the drain.

Dsteppa said:
It would be better if you also posted some screenshots with your battery usage.
EVERYTHING drains battery, literally everything. If your volume is on max it also drains more then when your volume is very low. (Just an example)
There is a controversy when it comes to WiFi vs 3G which drains more.
In the end I think that it depends on the coverage. For me 3G/4G drains my battery less then my WiFi due to the poor WiFi reception.
That your phone loses about 5% over night really isn't THAT bad, what I do before I go to bed is "Close all" to close all the aps running in the background (It won't terminate WhatsApp's service) and I let Greenify hibernate all programs that I selected.
There was also a talk about charging your phone to 100% vs 99% the first percentage drains fast for everyone so that's why it's maybe better to only charge it till 99%.
With screenshots of your battery usage we could help you more, but as far as I can see there is nothing wrong with your battery.
If you're rooted, try BetterBatteryStats to pinpoint the drain.
Click to expand...
Click to collapse
Well my device isnt rooted nor I use any wifi.
And also I use Greenify to shutdown all apps before sleeping and also I do manual force stop for many other apps as well.

[Q] Stamina Mode

Under power management > stamina Mode > extended usage. Is anyone noticeing Amy difference to when it's off? I'm running. 242 lollipop 100% stock. With it off get about 6-6.5hrs screen on time. With it on I don't notice any difference sometimes it might actually b about 4.5hrs.

Christopher.J.M said:
Under power management > stamina Mode > extended usage. Is anyone noticeing Amy difference to when it's off? I'm running. 242 lollipop 100% stock. With it off get about 6-6.5hrs screen on time. With it on I don't notice any difference sometimes it might actually b about 4.5hrs.
Click to expand...
Click to collapse
stamina mode is for when you don't use your phone, it disables connections and autoupdate for apps but not for the apps you put in exceptions. So that means that if you use your phone from 100% to 0% without interruption you really won't notice any difference, while in standby there is a big difference. for example during the night with stamina mode on my phone goes down by only 1% and around 5% if it is off.
you can still receive msges from whatsapp, viber, whatsapp ecc in stamina mode if u put those apps in exceptions. so my advice, use the stamina mode
only time you would consider to disable it, is when you tether your connecion throught bluetooth as the stamina mode disable connections while in standby it won't work well for bluetooth tethering

Extended usage is for when your actually usi g your phone. It's suppose to slow your phone down a little to give a bit more battery. Your talking about extended standby. Get Me?

Christopher.J.M said:
Extended usage is for when your actually usi g your phone. It's suppose to slow your phone down a little to give a bit more battery. Your talking about extended standby. Get Me?
Click to expand...
Click to collapse
as long as i know it doesn't slow your phone anyway when you use it. It works only when the phone is in standby. if you get less screen on time with stamina mode on, then i think it is bugged for you. With stamina mode on you should get more or at least the same screen on time.
To see if stamina mode is working ok, let your phone not in charge over 1 night with stamina mode on and check how much battery it used, and then 1 night still while not charging with stamina mode off. As i said with stamina mode on it should use around 1% while with stamina mode off it should use more, like 5% or more. If there is no difference then you have a bug

notifications delay

whenever the battery is less than 60% , I get notifications with a huge delay or I don`t even get them. Especially the messenger app. How do i keep the auto-sync always on gmail regardless of the level of the battery , and also to be on when it`s on saving mode?

andrey09g said:
whenever the battery is less than 60% , I get notifications with a huge delay or I don`t even get them. Especially the messenger app. How do i keep the auto-sync always on gmail regardless of the level of the battery , and also to be on when it`s on saving mode?
Click to expand...
Click to collapse
Perhaps you have battery saver on. Ensure it is off.

leledumbo said:
Perhaps you have battery saver on. Ensure it is off.
Click to expand...
Click to collapse
in the battery and performance, the battery is off.

Internet dies when phone reaches exactly 15% battery or less - how to solve?

I'm currently dealing with an extremely specific bug with my Redmi 8 running stock MIUI 11. Whenever the battery falls below 15%, both the Wi-Fi and mobile internet stop working, while still appearing as connected. Every single application I try behaves as if the signal was extremely low. Connecting the phone to the charger immediately returns the internet to normal, plugging it off before the battery reaches 15% immediately kills the internet again. Is there some hidden configuration to control the trigger that automatically disables the internet connection?

There must be a battery saving app that restricts connectivity when battery falls to 15% and allows reconnection when charger connected.

waseemakhtar said:
There must be a battery saving app that restricts connectivity when battery falls to 15% and allows reconnection when charger connected.
Click to expand...
Click to collapse
There's the problem, outside of the default applications that come with MIUI, I have nothing else that is supposed to restrict connectivity exactly at 15%. Does someone have a list of which MIUI applications are capable of changing system parameters depending on the level of the battery? Because it looks like I'll have to debug something in order to reset some apps.

I have the same device with the same software (I have the indian version of miui) but my phone behaves differently and not at 15% but at 20%. What happens is that notifications suddenly stop coming. At 15% vibrations and click sounds stop. But I have no issue with connectivity. Apps work normal I just don't receive notifications.

Battery saver settings must be setted wisely as per your needs. All problems will be resolved.