Question ? Setting - Battery - Display I still have about 80% load even after turning on the power, just whenever there look. I performed a factory reset, but it is still the same. Is this normal ? I never did not watch it, but because I fell stamina, so I do not know if it's workload tablet, or am I being paranoid ? :crying:
For activities that are not too CPU/GPU intensive - for instance reading web pages - it is quite typical for the screen to be responsible for 65-85% of the power consumed. On the Stock software, anyway.
If you make a claim that an improvement could be made in overall battery savings by changing kernels or ROMs, then you would expect the percentage of power used by the screen to INCREASE in those scenarios (assuming that the screen on-time & brightness was the same in a paired comparison).
good luck
PS. I'm pretty sure that each device in the tablet does not have it's own ammeter or current integrator - I'd hazard a guess that a great deal of "fudging" goes in to making up those individual power usage % rankings.
Thank you very much. The screen is around 80%, but other applications have only about 7% say it's okay. Thank you.
Related
I don't know if my suggestion is wrong or if I'm a total n00b or what the deal is, but what is up with the battery level issues on this phone? It goes from 100% down to 80% in like a matter of minutes even with no usage, it then drops steadily down to 50%, then it drops suddenly to 15%, then goes down to 10%, then 5%, then 1%. How can it be so hard to calculate a battery level?
Now I bet someone is going to come in here and bash my idea, and I apologise in advance if I look like a moron, but shouldn't the calculation for the battery level be something along the lines of:
((Current Voltage - Minimum Voltage) / (Maximum Voltage - Minimum Voltage)) * 100 = Current Battery Percent
If that would work (even if only a little better than the current method), can someone PLEASE write at least a widget or something that displays the actual battery level, not this inaccurate level that Samsung claims it to be, and if possible modify whatever it is that calculates it and replace it with said formula?
I tried this formula on my phone using a simple calculator (using 4.1V as my max and 3.5V as my minimum and a battery level widget to display the current voltage) and it seemed to work fine for me and it was a lot more accurate. I just wish it could be automated.
I think that's a common issue on Galaxy 3. Sometimes it's accurate, sometimes not.
I unplug it, after half an hour it's at 80%, then drops by 10% down to 50% and after that suddenly to 5%. Then I turn it off and on again and it returns to 50% or 60%.
But as I said, sometimes it's accurate, but I don't know what causes it.
I've tried some battery widgets, but they all display the same information.
That was a common issue that happens more frequently when you flash your phone without a full charged battery, when that happens i try to wait until the batery ends and wait 2 o 3 hours and charge the phone while its off until it shows full charge
Racoen said:
I think that's a common issue on Galaxy 3. Sometimes it's accurate, sometimes not.
I unplug it, after half an hour it's at 80%, then drops by 10% down to 50% and after that suddenly to 5%. Then I turn it off and on again and it returns to 50% or 60%.
But as I said, sometimes it's accurate, but I don't know what causes it.
I've tried some battery widgets, but they all display the same information.
Click to expand...
Click to collapse
Yes, its the same with my G3.. But it always was like that, with eclair and now with froyo.
These are the files that regulate it (its in c, but you my be able to understand some parts of it without it).
They didnt calculate it like that, but used an if..else if ...else method. and with fixed values of multiples of ten (except for lower battery).
I dunno how to compile from the sources, when I do I'll change it and send it to KARMA.
Also, sometimes when its low it doesnt show it correctly. Try rebooting if you suspect that.
I've noticed that last 20-30% stays for almoust 10h, but first 80% only 1 day.
If it was only the faulty display of the percentage I normally wouldnt even care. There are many widgets that display the actual battery voltage which gives a much better indication of the actual SOC.
BUT: what really gets on my nerves is, that when the calculated battery level drops below some 10%, the G3 reduces the display brightness, doesnt let me use the camera, doesnt let me start my music app... even if the battery voltage is still at 3.7-3.8V.
The problem seems to be (correct me if i am wrong), that the G3 calculates the battery level with the minimum of the measured voltage in that discharge cycle. So if I use some app which consumes more power, or if I have many active downloads or whatever, the voltage of the battery can sag for a short time, which also causes the calculated battery level to drop. When the phone is idle again the battery voltage goes back up, but the percentage is stuck (in worst case at a very low level).
Since a reboot seems to make the phone re-evaluate the actual SOC, the question is, if there is an app (or if someone can make an app) that forces the phone to re-evaluate the SOC without rebooting (and so also reactivates camera etc.). Even better if the firmware was modified in a way, that the algorithm for determining the battery level uses a filtered value of the battery voltage so that a short term voltage sag does not affect the calculated battery level.
I was just wondering about the whole deal with wiping the battery stats. To me it seems as if the point of this is strictly to get the OS to report and understand the battery more so than anything to do with the battery itself. I mean, the OS can't actually change the physics of the battery, right?
But the OS needs to understand what a full charge is and what an empty charge is, so that it knows when to shut down and when to stop charging and all that sort of stuff.
What I'm thinking is that if you wipe the stats and it's not at 100%, it will think that the discharge from that point to an actual low level is the full breadth of charging and adjust accordingly.
Is any of this remotely accurate? Or am I just making wild assertions?
Actually...it's the software that can make or break battery life...take for example background notifications. Wifi uses battery power and if you have different programs all polling for updates at x amount of times per hour..even when asleep..it will eat up battery juice...another example is the cm bug that kept the speaker on all the time and the nook never really went to sleep...it used tremendous amount of juice for not doing anything...another example..screen brightness..does not the software control how dim or bright you want it...and say you could not adjust the settings..your right..a battery is just a battery but how the kernel, drivers and loaded programs determine how fast or slow the battery power is to be used. Clearing the stats gives more accurate measurements for the kernel and hence will power down(power saver mode ) or other items for the kernel depending on what type of governor is on the nook..software wise.
I think you misunderstood what I was saying. What I'm trying to say is that the OS can't change the physics of the battery. Drain is drain, no matter what software is running. In other words, say you have two perfectly identical systems, both running the exact same software. The battery capacity is exactly the same on both and they both have the same drain. The battery doesn't actually drain faster on one vs the other, but the OS can *think* it's draining faster. That's why we have all these battery stats and such...right? Or am I wrong?
Oh Ok...you are right in the fact that it cannot and the software..depending on what it's state(charge level) is will determine how to run..it just makes it more accurate.
Wiping the Battery Stats tells the OS to start learning what the new High and Low are.
It doesn't matter what level of charge the battery has when you do this....
- As the battery gets lower the stat keeps updating the level as the new low.
- As you charge the battery it continuously updates the stat as the new High.
Once you have taken the battery to both of these extremes then, in theory, the OS will have accurate info on your battery.
At a certain point in time the battery stats stop updating which is exactly why it is important to do this.
Hi,
I started doing some battery tests today as I think my battery is draining faster than the quoted figures on this forum.
Please note the following, tests were carried out with Power saving ENABLED, 4g ENABLED, brightness on auto, wifi off, sync off, GPS off, bluetooth off, playing full screen and all the air gestures/eye tracking scroll off
Test 1 - from 100% battery charge
Play the movie Casino Royale (1080p) - roughly 145 minutes. Battery drop from 100% to 80% = -20%.
Average battery consumption of 1% for every 7.25 minutes played.
Next test was carried away straight after. Therefore perhaps the phone could still be hot causing the battery to drain faster.
Test 2 - from 79% battery charge
Play the movie Never Back Down (1080p) - roughly 113 minutes. Battery drop from 79% to 57% =-22%
Average battery consumption of 1% for every 5.13 minutes played.
The fluctuation of battery consumption was roughly 29% between the two tests. Between the two, average consumption of 6.19minutes per 1% consumption. Therefore anticipated playback time from a full charge is estimated at 10.3hr
This leads me to believe that either the battery "gauge" on the phone is either inaccurate or (more likely) my battery is somewhat faulty. Why else would the efficiency change so much? With my very limited knowledge, I can only come to the conclusion it is linked to the device's heat.
My questions:
A) Are these consumption figures in line with everyone else?
B) Why would the battery consumption fluctuate like this
C) My battery is way more efficient playing movies then it is listening to music while using whatsapp. Is this normal?
A) yes your battery is good if not better than some other's
B) on every phone i experinced the battery drops lower from 100% than it does from 75% and from 40% it really drops faster
C) because your using the internet which consumes a lot of battery
Your approach is flawed:
Don't start at 100% because it may say that but could be less as the battery is not kept charging once it's full. As a result it could be a couple of points below 100 and you wouldn't know. There was an article about this somewhere on this site.
Also, you must use the same video file to get the same result. Utilization and load depend mainly on bitrate and codec used, not the length and/or resolution in itself.
Cheers Ewok, quite new to this and didnt realise that a different video could have a different effect on the efficiency
I got my hands on the zerolemon 7500mah battery for my S4 about a month and a half ago and it is amazing.
With normal use (multiple e-mail push accounts, location tracking, wi-fi enabled etc) I get about 15% battery drop a day.
After a full charge, battery apps tell me "17-20 hours available."
Somehow the battery logic for android phones seems a bit off, it seems to be more a guestimate towards the current power use then the actual recorded battery run time.
Is there anything that can actually profile a battery ? Record the power use and battery voltage levels and give a more accurate picture over time ?
I *thought* android actually did this but apparently not, or its been because I'm only on my 4th charge since getting the battery but i'd like some confirmation if that's the case
I love this battery, this kind of battery life should be standard, only Android can't really deal with it properly yet .. the 15% battery alarm especially can be a pain: 'what do you mean battery low, its at 15% that's a full 24 hours!' and it still puts the phone in power saving mode.
I noticed that my S4 i9505 was getting hot despite what I was doing, playing heavy games like RR3, or just seeing some stuff on the gallery, and my battery is lasting around 10h...
So I made a test, put the screen timeout to 10 mins, and let it on the homescreen (with black background and no widgets, I have absolutely no widget on any homescreen), the battery drained very quick, and the screen was hot like hell
I forced to close all apps, cleaned RAM, and began the test again, same thing, battery draining quick, and screen very hot...
So I tried turning off wifi+GPS+mobile data, and made the test again, the battery didn't lose even 1%, and the screen was room temperature...
Now, why is it getting so hot and draining battery with wifi+GPS+mobile data even if I don't have any widget, and I always chose APPs like facebook to keep me always offline and never notify anithing?
This phone was very expensive, and I use Gotya to protect it from thieves, but I need to keep wifi+GPS+mobile data ON with I want this program to work, so I don't want to need to turn everything off and take the risk of being robbed and now getting it back, but also I just wanted to the battery last long enough so I don't need to charge more than at night while I sleep....
These are the options I use daily:
http://imageshack.us/a/img841/6088/zxeg.png
http://imageshack.us/a/img138/6043/7fk1.png
Even with power saving ON on two places, it rarelly lasts enough to not charge it before I go to bed
And this is my homescreen:
http://imageshack.us/a/img59/2005/i8b6.png
http://img713.imageshack.us/img713/659/2p8w.png
Using Wifi+GPS+Mobile Data, it will spend ~4% every 10 minutes... but when I turn them off, it'll spend ~1% every HOUR!
Specht77 said:
http://img713.imageshack.us/img713/659/2p8w.png
Using Wifi+GPS+Mobile Data, it will spend ~4% every 10 minutes... but when I turn them off, it'll spend ~1% every HOUR!
Click to expand...
Click to collapse
That's not too unusual. What do you expect? Using Wifi+GPS+Mobile Data does consume battery rather quickly on any device, particularly when the screen is on and driving a 5" Full HD screen.
If the Wifi+GPS+Mobile Data have weak signals, the battery will be consumed even more quickly than normal as the respective radio strains to connect to the weak signal. Even when the phone is completely off your phone, the battery will lose power, though at a slower rate.
The art and science of power management is about knowing what you want and prioritizing your needs based on realistic performance expectations. Almost nobody needs to run Wifi+GPS+Mobile Data at the same time, so ask yourself what's the thing you are doing and then prioritize your power expenditure based on those needs.
In my case, I don't use autosync. I sync manually every hour or so if needed, or less if not, and same for location services: Off until I need them. I toggle my data off when not using it, use Wifi over mobile data because it tends to be stronger signal and use less battery, keep my brightness at manually set reasonable levels, and I can easily get two days out of a charge, even with 4-5 hours of screen-on time, which includes gaming, surfing, calls, texts, voicemail, etc.
I'm not dissatisfied with the battery life, but I am dissatisfied with a few other things on the S4. It's not a perfect device, but overall, it's good, and I'm not even running a stock ROM, which is most typically said to give even better battery life overall.
Every Wiz-bang "feature" of Touchwiz comes at a price. There's no free lunch, my friend. Turn off what you don't need, or be prepared to pay the price for it.
donalgodon said:
That's not too unusual. What do you expect? Using Wifi+GPS+Mobile Data does consume battery rather quickly on any device, particularly when the screen is on and driving a 5" Full HD screen.
If the Wifi+GPS+Mobile Data have weak signals, the battery will be consumed even more quickly than normal as the respective radio strains to connect to the weak signal.
Click to expand...
Click to collapse
About the screen, as I said, in 10 minutes with W+G+M ON (Don't want to keep repeting every time) it spends +-4% with screen turned on (and it even gets HOT!)
with W+G+M OFF it spends 1% or less with the screen turned on (at least on my homescreen that is very dark) (and it keeps on room temperature)
I just expected that it didn't drained the battery so furiously, since I have no widgets to keep getting updates from internet, Sync is turned off, etc...
Specht77 said:
About the screen, as I said, in 10 minutes with W+G+M ON (Don't want to keep repeting every time) it spends +-4% with screen turned on (and it even gets HOT!)
with W+G+M OFF it spends 1% or less with the screen turned on (at least on my homescreen that is very dark) (and it keeps on room temperature)
I just expected that it didn't drained the battery so furiously, since I have no widgets to keep getting updates from internet, Sync is turned off, etc...
Click to expand...
Click to collapse
I live in a warm, tropical climate, and at times, during gaming or in poor signal areas, my S4 will get a bit warm, but nothing unusual, and again, when you have the radios turned on, they are going to heat the device up and consume the battery, and the hotter it gets, the worse the power loss is. It's just a fact. There are inescapable Laws of Physics at play here. There's no way around them at present.
The radios use a lot of power, and much more so when they are all on at once (as you described) and straining to connect in a poor signal area.
donalgodon said:
are going to heat the device up and consume the battery, and the hotter it gets, the worse the power loss is. It's just a fact. There are inescapable Laws of Physics at play here. There's no way around them at present.
Click to expand...
Click to collapse
By the way you're talking to me, I assume you think I'm a dumbass, it's obvious that the hotter it's getting it's because it's speding more energy, that's why I'm putting enphasis on the fact it's getting HOT, because I'm with absolutely no APP open, even made a "clear RAM" to close everything, and still it's getting HOT of how much energy it's spending even in IDLE
I have a nokia N8, and if I let it with screen on, on IDLE, wifi ON, 3G on, it won't get hot as my S4 is getting from the draining of the battery
Specht77 said:
By the way you're talking to me, I assume you think I'm a dumbass, it's obvious that the hotter it's getting it's because it's speding more energy, that's why I'm putting enphasis on the fact it's getting HOT, because I'm with absolutely no APP open, even made a "clear RAM" to close everything, and still it's getting HOT of how much energy it's spending even in IDLE
I have a nokia N8, and if I let it with screen on, on IDLE, wifi ON, 3G on, it won't get hot as my S4 is getting from the draining of the battery
Click to expand...
Click to collapse
That's not what I think. I don't experience what you do, so I can only guess that it's something related to a) Tochwiz and/or your software cong or b) something hardware related to your device.
Have you thought about flashing CM to test it? I'd be curious to see if it continues.
FWIW, I'd love a Nokia-based Android device. Their hardware is amazing.
Go into Settings > More > Developer Options > Show CPU Usage. It should indicate which process is using a lot of CPU and heating up your device.
That gotya protection app should be working overtime on all radios keeping it awake and running all the time ... may be something with it's settings or you should find another one to do the job ... generally if you have some apps syncing and an open data connection halves your battery life and even more if that is mobile data but still your case is certainly abnormal and i think it has to do with the particular app you mentioned using ...
uninstall it and test how battery hold with data connections and gps on ...