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Hi all!
Currently my battery drains about 3% per hour in sleep mode, I don't know if it is normal or not, but the point is that I don't want it to worse rapidly.
For this reason I am asking you, how often you charge battery, if you wait it is fully discharged or not, etc...
In effect it is because I asked it to my professor about this and he answered that different than the old Ni-Cd battery packs requiring the deepest charge-discharge cycle possible, these new generation Li batteries on contrary need to be charged as much as you can and have a durability inverse proportional to deepness of charging process; this means it is better to charge it every time it is possible without to let it discharging.
Now, share your opinions about that...
He's right! Li-Ion and Li-Polymer batteries are most efficient when charged frequently, with a deep discharge/recharge about once every 3 months to reset the battery condition monitors built into the batteries.
They are best left on a USB charge when near a PC, but of course a long day out with these new devices often means they are pretty run down at the end of the day.
In reality, the battery life, even when frequently discharged will probably outlive the lifespan of the device but I've had a few older ones that have needed a new battery after 3 or 4 years.
3% use per hour in sleep mode isn't bad considering it is maintaining a phone signal all the time- does it regularly poll for emails etc?
Thanks for your reply!
About drain issue I can say I use WMLonglife that should disconnect idle connections after a prefixed time and it seems to work as what I can see when screen is on. I can not confirm its regularity on screen off mode, but I presume so, given its proper behaviour in other mode.
I can add that I have a "flat" connection and every connection is preferrably (in order) Hsdpa, 3g, gprs.
My Leo is equipped with:
1.43 T-Mobile UK ROM, 1.24.xxx radio
Don't know if it is important.
I've seen this probably
3% per hour is bad because it means the batteries full lifetime without turning it on would last close to 1ΒΌ days only. You either are on the limits of cell coverage or more likely your device is going to screenoff instead of sleep. Think what you have tweaked and investigate power states. Also, there might be an app running that requires some functions that are available only during power "wasting" power states and keeps the device in screenoff power state.
Thanks for your contribution... but how can I investigate on its real power state, how can I assure if it is really in sleep mode or has only shut down screen?
Same here. Battery lasts less than a day without much usage. I switched off 3G completely now and am testing how long it lasts now.
There is a HTC location option (in the configuration tab of Sense) which can be switched off. Perhaps it is this thing which eats power? What's it for anyway?
The location option is for determining your current location for services like actual weather conditions. It determines your location by using the GSM base stations and signal strenght.
You could disable this, but above mentioned services will not update automatically anymore.
Might indeed want to check any programs that could have auto-update/sync with internet on. My battery typically drains 7-10% per night with half-hourly sync (weather, twitter, mail, etc) and all other options like location services on. I'm on Vodafone branded 1.43 NLD stock rom.
Cavallipurosangue said:
Thanks for your contribution... but how can I investigate on its real power state, how can I assure if it is really in sleep mode or has only shut down screen?
Click to expand...
Click to collapse
The best way is to download Battlog and check from logs what is happening. It tells you the states and everything. The best thing is if the logging stops during standby. This means it IS sleeping
Hi,
My girlfriend has recently bought a Galaxy S. It has not been rooted or flashed. She's having a problem where the display is using 70% of the battery, even with the brightless set low, as shown under Settings -> About Phone -> Battery
Unplugged for 7h 15m 28s
Display - 70%
Cell standby - 10%
Phone idle - 5%
Android System - 5%
Android Core Apps - 3%
Android OS - 3%
Internet - 2%
Has anyone heard of this before?
What can we do to fix it?
Thanks
Scott
scott9824 said:
Hi,
My girlfriend has recently bought a Galaxy S. It has not been rooted or flashed. She's having a problem where the display is using 70% of the battery, even with the brightless set low, as shown under Settings -> About Phone -> Battery
Unplugged for 7h 15m 28s
Display - 70%
Cell standby - 10%
Phone idle - 5%
Android System - 5%
Android Core Apps - 3%
Android OS - 3%
Internet - 2%
Has anyone heard of this before?
What can we do to fix it?
Thanks
Scott
Click to expand...
Click to collapse
Likewise, the display is draining the most battery comparatively to other things. (I'm using the lowest settings)
Im not speaking from research (how other superphones behave), but wild guess - it is normal for all touch screens, especially bigger ones.
Touch or not - it doesn't matter.
Screen technology and size matters.
See 4" has around 4 times the area of 2" display.
How long was the display active for ? This is normal if you have it turned on a lot at high brightness settings.
i'm not surprised even if the 70% is true, because my HTC Athena is a power hog when i keep the screen on for a long time, the juice que sucked up in a couple of hours of use.
the SGS i9000 is having a better run for the power.
at least i can play 3D games (ASPHAL5) in it without worrying about running out of battery like with my old HTC Athena
scott9824 said:
Hi,
My girlfriend has recently bought a Galaxy S. It has not been rooted or flashed. She's having a problem where the display is using 70% of the battery, even with the brightless set low, as shown under Settings -> About Phone -> Battery
Unplugged for 7h 15m 28s
Display - 70%
Cell standby - 10%
Phone idle - 5%
Android System - 5%
Android Core Apps - 3%
Android OS - 3%
Internet - 2%
Has anyone heard of this before?
What can we do to fix it?
Thanks
Scott
Click to expand...
Click to collapse
See, you are kind of reading this information wrong, IMO. Yes, the display usese 60+% of power, regardless of brightness settings, if you have the display on. Here's the simple math:
Standby time (no sync, no 3G, basically, literally just standing by, screen off doing nothing: 24-25 days
screen on time: 4-7 hours.
You can see that the screen sucks SOOOO much more power than just about everything else your gf had going on in her usage, there wasn't a high usage scenario other than the screen. However, if you use something like GPS the stats will "look better" but you'll have less battery because it'll go from screen to 40% and GPS to 30% but your battery would be nearly dead.
Also, if she just went to sleep then Cell standby and Cell idle jump by 1-5% each and then you have "better looking" statistics.
This essentially means, if you use the phone with the display a large percentage of the time that the phone is unplugged, expect these percentages. I unplug my phone at night, when I wake up my display percentage is 0% (not necessarily better than 70%, because it's usage dependent), then I go to work, so I might run unplugged for 20 hours, use 8% of my battery with my display reading at 20% of the power used. Then, I'll go home and play with it and it's upto 40%, the moral is that it's good to know how much your battery is used on various tasks, but anywhere from 20-70% is normal depending on how much you actually have the display on while it's unplugged.
70% sounded right. There was a youtube VDO that dissemble galaxy s awhile back that really give a good perspective.
The CPU, GPU, GPS, memories etc etc almost fit on your thumb. They are so miniturised and so small. The rest are chassis, batteries and screens taking up almost all the space.
So it is no surprise that the screen should be what guzzling down all the batteries.
didnt know it uses that much...
She's having a problem where the display is using 70% of the battery. [...] What can we do to fix it?
Click to expand...
Click to collapse
The easiest way to fix this is by installing & running multiple applications that consume a lot of battery power. This should lower the percentage of battery power that the display consumes significantly.
(Only posting this because you already got more helpful answers in this thread)
alovell83 said:
See, you are kind of reading this information wrong, IMO. Yes, the display usese 60+% of power, regardless of brightness settings, if you have the display on. Here's the simple math:
Standby time (no sync, no 3G, basically, literally just standing by, screen off doing nothing: 24-25 days
screen on time: 4-7 hours.
You can see that the screen sucks SOOOO much more power than just about everything else your gf had going on in her usage, there wasn't a high usage scenario other than the screen. However, if you use something like GPS the stats will "look better" but you'll have less battery because it'll go from screen to 40% and GPS to 30% but your battery would be nearly dead.
Also, if she just went to sleep then Cell standby and Cell idle jump by 1-5% each and then you have "better looking" statistics.
This essentially means, if you use the phone with the display a large percentage of the time that the phone is unplugged, expect these percentages. I unplug my phone at night, when I wake up my display percentage is 0% (not necessarily better than 70%, because it's usage dependent), then I go to work, so I might run unplugged for 20 hours, use 8% of my battery with my display reading at 20% of the power used. Then, I'll go home and play with it and it's upto 40%, the moral is that it's good to know how much your battery is used on various tasks, but anywhere from 20-70% is normal depending on how much you actually have the display on while it's unplugged.
Click to expand...
Click to collapse
Thanks, but that's the thing, I have a Desire and if used similarly (with brightness set highest) mine shows:
Android System 31%
Cell standby 21%
Wi-Fi 21%
Phone idle 16%
Display 11%
I thought the Galaxy S's screen is supposed to be more power efficient than the Desires so that's why it doesn't make sense to me. Again today her battery use shows:
Display 61%
Cell standby 17%
Phone idle 10%
Android OS 6%
Android System 3%
Internet 2%
So I think either my phone (Desire) is reporting the battery use wrong, her phone (Galaxy S) is reporting it wrong or the display is using more than it should? Now I had a similar battery % when I flashed a few 2.2 roms onto my phone, but people were saying that was because the drivers weren't correct. (I haven't flashed 2.2 recently)
Cheers
Scott
scott9824 said:
Hi,
My girlfriend has recently bought a Galaxy S. It has not been rooted or flashed. She's having a problem where the display is using 70% of the battery, even with the brightless set low, as shown under Settings -> About Phone -> Battery
Unplugged for 7h 15m 28s
Display - 70%
Cell standby - 10%
Phone idle - 5%
Android System - 5%
Android Core Apps - 3%
Android OS - 3%
Internet - 2%
Has anyone heard of this before?
What can we do to fix it?
Thanks
Scott
Click to expand...
Click to collapse
Hello,
Same happened to me, but I used live wallpaper. When I turned to the simple wallpaper the usage from 75% dropped to 50% -keeping all my other activities constant.
Chryssa
I don't think that the info displayed by android is very accurate.
I get about 55% too though.
Sent from my GT-I9000 using XDA App
Just press on the display-bit, and you can see how many hours/minutes it's been on.
19 hours since unplugged:
Android OS: 36%
Cell Standby: 25%
Phone Idle: 18%
Display: 14%
Wi-fi: 3%
Android System: 2%
Those 14% is 31minutes continious use...
31 minutes of Display time is nothing over 19 hours, hence the low percentage. Mine shows approx. 50% usage when it's been used say almost 2 hours and phone awake time 14 hours.
For the OP, if you don't tell us how long the display has been switched on ... all the answer will be just guessing
As everybody says, the display is always the bigger battery consumer unless you use your phone as a mp3 player or just a phone to receive call.
If you go on the web, play games, read mails, use maps ... the display will always be the biggest ( maybe the gps can go higher ... )
On my side I have 65% of battery left after 7h unplugged
50% of display for 1h4mn
21% of android OS
13% of cell standby
8% of phone idle
It's all down to the comparatively slow advancement of battery technology.
Screens are getting bigger, higher resolution and more power-hungry. Just the same as processors and GPUs need more juice, new wireless standards are introduced and multi-tasking becomes popular.
We've come from dumbphones (eg: the old Nokias) used almost solely used for calling and sms to phones that handle half the stuff in our lives, yet they're still using almost exactly the same battery technology to power it.
Simply put, the smarter the phone, the more power hungry it will usually be. And the Galaxy S is currently the smartest phone of the market.
Samsung compensated by fitting a larger battery, but they can't perform miracles with the aging battery tech.
Take a look at the x-ray scans and teardowns of the iPad; 80% of its internal volume is battery space to allow it to last for 10 hours! Sadly phones don't have the same space luxury without the rear getting chunky.
I'm hoping increased capacity batteries are released like the Hero had, as the Galaxy S is large but thin enough that some extra volume on the back wouldn't be much of a problem.
scott9824 said:
Hi,
My girlfriend has recently bought a Galaxy S. It has not been rooted or flashed. She's having a problem where the display is using 70% of the battery, even with the brightless set low, as shown under Settings -> About Phone -> Battery
Unplugged for 7h 15m 28s
Display - 70%
Cell standby - 10%
Phone idle - 5%
Android System - 5%
Android Core Apps - 3%
Android OS - 3%
Internet - 2%
Has anyone heard of this before?
What can we do to fix it?
Thanks
Scott
Click to expand...
Click to collapse
That is just fine! It's just the percentage guys.
Think about it this way.
Compared to the energy consumption of the display other things uses much less energy.
However on my Galaxy S, I played 6 hours (almost 3, 720p Movies) continuously. Isn't it just awesome on a device having 800x480 Crisp Display that only weighs 118 grams?
karunadheera said:
That is just fine! It's just the percentage guys.
Think about it this way.
Compared to the energy consumption of the display other things uses much less energy.
However on my Galaxy S, I played 6 hours (almost 3, 720p Movies) continuously. Isn't it just awesome on a device having 800x480 Crisp Display that only weighs 118 grams?
Click to expand...
Click to collapse
With brightness set to auto-brightness or max or min?
@OP - this is very normal. I always get the same type of readings.
Except when I talk(voice call) for a very long time.
Mine also same display always use up more then 70% and the battery can't even stand for 8 hrs, with very minimum usage 1hrs wifi, 20 min call, 1/2 hrs 3g, 1 hrs navigation(with charging). Have got battery replacement from samsung but still the same I read a post some where for UK set, the guy get 1 to 1 replacement, battery can last for 2 days for it new set, just wonder is it the flaw set we having that cause our battery drain? My friends told me that for his set from morning till after work (9 to 8 pm almost 11 hrs) battery only drop 10%. I really hope someone can help us to prove is samsung selling flaw set so we can claim 1 to 1 exchanges.
Hi guys, this is not another rant post about battery life, but i'm starting to become really
frustrating with it, i tried almost all the solutions provided here on the forum but i can't
simply get the **** out of it. This is my story:
I bought the phone as used around 1 month ago (the guy who sold me the phone used it for around 1
month as well). I was quite satisfied about the device, but i noticed almost immediately the damn
poor battery life. With stock battery, my stats are (this is an average of the last 3 times i
used it):
Average duration: 27 hours
Average display usage: 2.5 hours
Average display %: around 45%
Average standby: Cell 30%, phone 15-16, other apps and android core 1-2
This with the following configuration:
3g off
gps off
background data off
bluetooth off
display brightness set to the minimum
no background applications or live wallpapers
No animations
No vibration feedback
No sounds
No widgets
Removed 5 touchwiz panels out of 7
Wi fi on (actually i noticed some small improvements by leaving it off)
The strange thing is, i noticed that the phone drains a LOT of battery while in standby. During
the night (7-8 hrs standby) my phone can drains up to 20% of the battery life. I read on the
forum that a lot of you guys have a battery drain overnight of around 2-3% which is 10 times
lower than mine.
So i thought about 2 possible causes:
1) Software related(processes or applications running in background)
2) Hardware related (battery ****ed up by the previous owner; phone not going in standby correctly)
Regarding the problem 1) i tried almost every solution provided here on the forum. Updated to new roms (JM5 and JM8) installed ultraslim roms, installed battery saving applications and task killers, performed some exotic "fixes" (removed battery stats file, tried to completely drain the battery following some procedures explained here on the forum). Nothing helped. To check case 2) i bought a cameronsino extended battery. Well with this battery i have exactly twice the duration of the stock battery. Last night i charged it to full before going to bed. This morning, when i woke up, the phone drained 10% (!) of the battery in 8 hours. So the stock battery is not the problem. What should i think then? that My phone is ****ed up? is There no chance to obtain a decent battery life? How is possible that a lot of guys have almost twice my battery life with stock battery?
I guess your phone may not be going into the sleep mode correctly ... try using system panel (from the market) and figure out which rogue app is causing the problem. Mine usually drains 4-5% at night.. (jm8 stock + voodoo)...
Samsung GT-T5800. Android OS 2.1-update 1, I5800XXJH1, Kernel 2.6.29 root SE-S603 #2.
The problem:
1. Battery till 50% discharges normally - about 10-15% per day, but after 50% it immediately shows 15% and asks to connect charger and phone switches off very fast. actually no chance to mane even emergency call. No 40%, no 30%, no 20% in battery level.
2. When connect phone to charger - battery charging level immediately set to 80% or every ~10 seconds: 50%, 60%, 70%, 80%. After that phone charges about 1,5-2 hours till 100% and after about 1-2hours it asks to disconnect from the charger. Battery temperature during charging and after it: 31-33C.
After 3d 8h 40min. (~80hours using applications: Battery booster and Memory Booster, no 3G) of battery usage phone switches off.
Battery usage was:
Android system: 61%
Cell Standby: 19%
Phone Idle: 12%
Bluetooth: 4%
Voice calls: 4%
Time from 15% to 5% - 15 minutes with no using the phone. Battery's temperature 20C, Voltage: 3588mV Phone switches off. I have tried 2-3 times to switch on the phone to make battery more empty and finally switched it on and at the same time connected it to charger.
Here is the interesting charging time line after phone died and was switched on to charge it (sorry - no in seconds):
0:00 - 1% - 20C/3588mV (temperature/voltage)
0:01 - 3%
0:01 - 5%
0:01 - 15%
0:02 - 15%
0:03 - 30%
0:03 - 40%
0:04 - 30%
0:05 - 15%
0:07 - 15%
0:09 - 30%
0:12 - 40%
0:14 - 30%
0:15 - 15%
0:16 - 30% - 28C/3698mV
0:18 - 40% - 28C/3718mV
0:20 - 50% - 28C/3730mV
0:21 - 40% - 28C/3727mV
0:23 - 50% - 27C/3728mV
0:36 - 60% -
0:36 - 50% - 26C/3769mV
0:37 - 60% - 26C/3774mV
0:59 - 60% - 26C/3807mV
1:24 - 60% - 26C/3807mV
2:06 - 70%
2:07 - 80% - 26C/3906mV
2:44 - 90% - 26C/3971mV
3:18 -100% - 25C/4101mV
4:03 -100% - 22C/4184mV - Asked to disconnect the charger.
After this charge GT-I5800 (with no any software changes) stoped to show 50% to 15%, but 30% disappears fast to 15% (it means one short call).
Possible that battery issue reason is that (I think) phone was charged partly switched off and partly switched on.
Maybe there are some battery level controlling OS software bugs, I do not know.
Is it official bug or issue?
Or some guru can comment that battery level issue? I saw I was not first user having it.
should be from the firmware
it seems this happening to all
Well i also have exactly the same issue...
I have observed that when i make/recieve a call the battery voltage decreases greatly because of which the battery also decreases and after sometime the battery voltage comes back to normal but NOT the battery.
My battery also drops down from 50% to 15% or 5%.....It's really very annoying...
I think that this is a frimware issue but i am not sure..I am scared that it could be a hardware issue...
Well i have mailed Samsung also regarding this issue so that they fix this issue in the next frimware upgrade and hope others also do the same so that we have a better chance of this bug getting fixed.....!!!
pravarthegreatest said:
Well i also have exactly the same issue...
I have observed that when i make/recieve a call the battery voltage decreases greatly because of which the battery also decreases and after sometime the battery voltage comes back to normal but NOT the battery.
My battery also drops down from 50% to 15% or 5%.....It's really very annoying...
I think that this is a frimware issue but i am not sure..I am scared that it could be a hardware issue...
Well i have mailed Samsung also regarding this issue so that they fix this issue in the next frimware upgrade and hope others also do the same so that we have a better chance of this bug getting fixed.....!!!
Click to expand...
Click to collapse
And when I switch off / on the phone then it shows probably correct vallue. For an example. It shows me 15% and after restart it is 60 %. What a stupid bug - I've never have this problem with any device before. Even phones 10 years ago were able to show correct battery status. I think this problem was also with original 2.1 android firmware.
Can someone who has upgraded to froyo pl. confirm that this issue is resolved in the new firmware?
Sent from my GT-I5801 using XDA App
TekkenLaw said:
Can someone who has upgraded to froyo pl. confirm that this issue is resolved in the new firmware?
Sent from my GT-I5801 using XDA App
Click to expand...
Click to collapse
yes, in JP9 / froyo is still this battery problem. When I switch on / off the phone then it's ok. Does someone resolved this issue please ?
My issue still exists. Froyo did not help. Also I can't understand why does one time on charging battery becomes hot, another time -cold.
same for me, and today i charged my phone and after charging just put it on my table after 1h i saw that there are only 80%. Didn't see this on other firmwares
Same here. I thought it is because of my battery manager widget which I had installed, but un-installing/master clear also did not help. Looks like it is major problem. Moreover, few of the battery widgets mention that in some devices they report 1% level battery change, but in Samsung I5801, it will be 10%.
what about this issue at JPA ?
when you was installing JPA did you hard reset your phone ? (factory settings)
If yes which application do you use for restore all of the datas and settigns ?
Yes, it was done. Hard reset seems is not related, and did not help.
Same problem here...
Since built in battery meter is not accurate at all Im using custom one but problem remains.
might fix battery issue.
might work...saw it for Epic 4g and gave it a shot (as its Samsung too). Some sites say LiON do not have memory like NiCd did but somehow it worked for me. Now I stay on 100% for 5hrs or so. lasting 2 days with 45mins call time and some Wifi use. Like today charged full 100% at 9AM and now its 2230 and I have 80%.I have switched off a lot of things. See below.
http://androidforums.com/epic-4g-tips-tricks/171804-recalibrating-battery.html
http://forum.xda-developers.com/showthread.php?t=701567
Above needs to be done once only. If it doesn't work then go to service center. Remember battery has 6 months warranty only so be quick and try above on new battery.
I also run LauncherPro instead of stock. Disabled data and enable when out of AP range (only use Wifi when needed and have an AP). Background data/synch is always off unless I use market. All apps are set to never except Gmail. Use K9 Email too and ATK. Am on DDj6 FM. Have removed a lot of apps, foursquare included and run 2 screen with LauncherPro widgets only.
Settings to switch off are here.
http://jvoegele.blogspot.com/2010/10/how-to-improve-battery-life-for-samsung.html
http://www.wonderhowto.com/how-to-hack-your-htc-evo-4g-increase-battery-life-373058/
afalak said:
might work...saw it for Epic 4g and gave it a shot (as its Samsung too). Some sites say LiON do not have memory like NiCd did but somehow it worked for me. Now I stay on 100% for 5hrs or so. lasting 2 days with 45mins call time and some Wifi use. Like today charged full 100% at 9AM and now its 2230 and I have 80%.I have switched off a lot of things. See below.
Click to expand...
Click to collapse
As long as I know li ion batteries doesnt have the memory effect but they still have to be recalibrated from time to time, lets say once a month. That means dont charge the phone until it goes off and then charge to the top.
I wasnt willing to wait for 11 hours for phone to charge when I bought it and after few days I ve notice that battery last very short. After that I ve performed the full cycle (drain to the bottom - when phone turn itself off, then after few minutes turn it on, wait until it goes off - repeat few times until its completely off then charge it fully - I usually turn off the phone while charging ).
As long as I know all modern devices like phones, notebooks etc shut down before the battery is completely drained because they want to have safe margin of the battery power because of, as long as I know, when li ion batteries become completely drained then could be damaged completely so you cant recharge them again. Anyway with that "turn on then its drained" I believe that I use the battery more than normal and that phone will recalibrate to the new situation figuring that battery have more voltage than phone "expected".
Anyway with few recharging cycles like those I ve described above I can use the phone now for a 2 days with moderate usage...
That 50-15 problem still exist but 100% period last quite long and also phone can be used a long time from the moment battery reach 15% ...
Try doing it the other way round!
Keep your device on constant charge or at least as much as possible for 10 days from new and you should have now problem.
I have run tests on Lion powered devices for the past 5 years and I have never had to "calibrate" once.
My battery usage is always consistent and seemingly accurate.
And this method encourages max power from the battery.
Sent from my Ideos S7 using XDA App
i just flashed my I5801 with Froyo (XXJPB and then XXJPA), but having very low battery back up, can anyone advice something which can help boosting the performance of the battery? Please help.
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