Related
Hi,
Can you please install free acbPowerMeter (http://www.acbpocketsoft.com/Products/acbPowerMeter/acbPowerMeter-Overview-2.html) which is free. Enable bluetooth, turn off the phone and let it run for 10 mins or so with no calls, data etc. Please check average mA used and post results here so we have some data at hand to compare different ROMs and power consumption.
My case
1.54.07.00 --> power consumption was between 50-60 mA
1.48.00.10 --> power consumption was between 15-25 mA
Again this was with bluetooth on and no data, incoming or outgoing calls, screen is off for 10 mins or so.
Good idea.....everybody please give this a go.
1.48.00.10 - GSM 1800 - Average 34mA
1.48.00.10 - UMTS 2100 - Average 33mA (interesting)
Ideally we could use somebody flashing a naked ROM (such as pandora) and trying out each radio on both GSM and UMTS (3G). My tests have phonealarm running in the background which most likely causes more juice to be sapped.
1.54.30.00 measure conditions - GSM on, BT on, display on, backlight off - 38mA
That was average after about 30min with the above settings
1.54.30.00 - 32mA
TNT's ROM after 10 min.
Bluetooth on, Back light off
1.54.30.10
GSM ROM 1.54.30.10
1) measure conditions - GSM on, BT on, display on, backlight off - avg. 37 mA, total 6mAh
2) measure conditions - GSM off, BT on, display on, backight off - avg. 26 mA, total 4 mAh
Maybe will be good to specify standard for measure conditions, because these description is uncartain and for true result it is neccessary. I don't understand to all causes of battery consumption, but it also depends on applications in RAM etc.?
GSM ROM 1.54.30.10
GSM/UMTS OFF
1) measure conditions - GSM off, BT on, display on, backlight on (40% brightness)- avg. 42 mA, total 7mAh
2) measure conditions - GSM off, BT on, display on, backight off - avg. mA, total mAh
GSM/UMTS ON
1) measure conditions - GSM on (UMTS 2100), BT on, display on, backight on (40% brightness) - avg. 54 mA, total 9 mAh
2) measure conditions - GSM on (UMTS 2100), BT on, display on, backight off - avg. 36mA, total 6mAh
*Test is still ongoing, flashing to 1.47.00.10 & post will be edited later on
mrvanx said:
Good idea.....everybody please give this a go.
1.48.00.10 - GSM 1800 - Average 34mA
1.48.00.10 - UMTS 2100 - Average 33mA (interesting)
Ideally we could use somebody flashing a naked ROM (such as pandora) and trying out each radio on both GSM and UMTS (3G). My tests have phonealarm running in the background which most likely causes more juice to be sapped.
Click to expand...
Click to collapse
I think you right - it would be best to have one peson run through the radio roms and record. Each person posting their results is somewhat apples to orages because battery consumption has a lot more variables then just sceen off - bluetooth on - i.e. differn't loads on the processor (might have program taxing the processor in the background) - distance from towers (somebody closer to the tower will use less power then somebody futher), etc. - even the weather can effect it. There are soo many variables that unless we have one person, using the same rom in the same place that will flash one radio, test and then move on to the next radio rom, it is unlikely that we will get an accurate representation of battery consumption per radio rom
If I have time i might begin a series of tests once ive flashed a 'naked' rom. Taking an old radio (no older than 1.27) as the baseline.
so whatever the consumption the rating for the baseline radio would be 1.00.
a consumption of 10% above would result in a score of 0.9......less power consumption shows a score of above 1.....higher scores are better obviously......everybody agree?
That sounds awesome. If you need any help let me know. It's a lot of work to take on. But you could complete a good series in a day if ya have the time. We would know which radio rom has best power consumption and then all we have to do is figure which one works for us in our area and be done with it.
Maybe Start a new thread?
Good luck.
Chris
mrvanx said:
If I have time i might begin a series of tests once ive flashed a 'naked' rom. Taking an old radio (no older than 1.27) as the baseline.
so whatever the consumption the rating for the baseline radio would be 1.00.
a consumption of 10% above would result in a score of 0.9......less power consumption shows a score of above 1.....higher scores are better obviously......everybody agree?
Click to expand...
Click to collapse
couldn't ask for more from u bro... my thanks in advance for your time..
mrvanx said:
If I have time i might begin a series of tests once ive flashed a 'naked' rom. Taking an old radio (no older than 1.27) as the baseline.
so whatever the consumption the rating for the baseline radio would be 1.00.
a consumption of 10% above would result in a score of 0.9......less power consumption shows a score of above 1.....higher scores are better obviously......everybody agree?
Click to expand...
Click to collapse
Mrvanx, you never cease to amaze me in your awesomeness
very productive...can't wait for the overall results!
Hello From Greece - Cosmote
Hello Guys and Happy New Year ,
I Have Made My Tests And the Results Are :
ROM 1.48.00.00
GSM
1) Measure Conditions - GSM On, BT on, display off, avg. 71 mA, total 2mAh
2) Measure Conditions - GSM off, BT on, display off avg. 65mA, total mAh
UMTS
1) Measure Conditions - UMTS on (UMTS 2100), BT on, display off, avg. 71 mA, total 3 mAh
2) Measure Conditions - UMTS off (UMTS 2100), BT on, display off, 66 mA, total 2mAh
That Are My Results As I Can See Big Consumtion but its the better radio here in greece in my opininion
Whats The better radion for battery life any suggention?
Waiting 4 Pm!!!
OK, does anybody have any test criteria for this??
Test 1: Radio on GSM mode, bluetooth off, nothing running except bare ROM & power meter.
Test 2: Radio on UMTS mode everything as test 1.
All tests an average over 10 mins. (as the original tests on this thread).
mrvanx said:
OK, does anybody have any test criteria for this??
Test 1: Radio on GSM mode, bluetooth off, nothing running except bare ROM & power meter.
Test 2: Radio on UMTS mode everything as test 1.
All tests an average over 10 mins. (as the original tests on this thread).
Click to expand...
Click to collapse
Seems good to me - maybe give it 2-3 minutes from when you think the phone has booted to ensure all startup tasks have completed so the phone should have the least possible processor load. Also, I would try to have the phone in as close to the same location as possible for each test (so it will be as close to the same distance from the same tower for each test)
I think it's probably a bit much to load field test to ensure you are connected to the same tower each time though :S
chymmylt said:
Seems good to me - maybe give it 2-3 minutes from when you think the phone has booted to ensure all startup tasks have completed so the phone should have the least possible processor load. Also, I would try to have the phone in as close to the same location as possible for each test (so it will be as close to the same distance from the same tower for each test)
I think it's probably a bit much to load field test to ensure you are connected to the same tower each time though :S
Click to expand...
Click to collapse
LOL too right.
The current tests im trying are:
Test 1 : 10 minutes of idle.......gsm only everything off and backlight off (not in standby). Nothing loaded except the power meter, no running tasks or today items.
Test 2 : as test 1 but with UMTS instead of gsm.
The results are showing up currently around between 10 and 20 mA.
Seems ive reduced the current being drawn by removing alot of processes and ofcourse the backlight. Any differences in the radios usage of the battery should show up clearer now.
EDIT:: have tested four radios, will come back on in the morning and report my findings.
EDIT 2:: See my new thread about this.
Thought of another thing that could affect results - if you have the SD card in or out. I assume you've already begun so just be sure that all test are preformed the same - if you haven't already begun - to get a more accurate measure I'd go w/o the card.
mrvanx, this could be great and useful..
If I might suggest the testing procedures.. it could take a lot of time to test everything, but would be a great comparison..
1.) GSM vs UMTS standby
2.) "Idle vs load" stress test on the processor/s ( spb benchmark, playing movie, ect.. )
3.) GSM vs UMTS back surfing the internet
4.) Wireless, bluetooth connections tests, ect.
It will give us better picture on the battery performance with different radios along with battery consumption while using the device in heavy usage conditions
What is necessary to detect the correct battery consumption?
Something like this: http://www.vandenmuyzenberg.nl/PowerGuard/ ???
Should I use this tool?
hungry
my phone is hungry comsumation
average = 283 mAh
any sugestions to reduce ?.....
Throughput across wifi is approx 200KB/s which is not 'too bad' but its only about 1/6th the speed of my connection. The biggest issue though seems to be the ping. I get about 30ms when pinging the phone, and on the phone itself web pages seem to take quite a good 3-5x longer to load than my desktop computer (also connected via wifi). I've set the wireless performance slider to maximum performance but is there anything else I can do?
Mobile devices never had good wifi antennas. Except for several models.
Rhodium had got *only* a 528Mhz processor (not to mention bad Opera optimization, ram access, slow storage etc), I guess that's the biggest bottleneck when viewing webpages.
This guide is a work in progress, please contribute to it so we can have a central place for battery info!
Table of Contents:
1. Quick Tips
2. Monitoring Battery Usage
3.The Nitty-Gritty Details
4.Frequently Asked Questions
5.References
6.Changelog
Quick Tips
NOTE: As with many devices in their early days, there seems to be a few bugs needing to be worked out. Some of which include:
High "Android OS" Battery % usage. Possible remedies include settings->Wifi->Advanced(menu)->Keep Wifi on ALWAYS when sleeping; Trying alternative kernels from the dev section; although 4.0.3 may have some improvements, early leaks are not yeilding substantial changes.
High "Media Server" battery % usage when using a media app with audio, video, etc.
High Preset voltage table in kernel can be fixed with UC Kernels, but proceed cautiously.
http://code.google.com/p/android/issues/detail?id=22878
Battery Capacities. NOTE: The batteries are NOT interchangeable between GSM and LTE!
GSM: 1750mah
LTE: 1850mah
LTE extended battery: 2100mah
GSM extended battery: 2000mah
Settings that use us battery:
Screen brightness: Using the lowest comfortable setting will save a good bit of battery, espescially on such a large screen. App LogGraph can be used to change auto-brightness levels
Haptic feedback: Switch this setting off (Settings->Sound->Vibrate on touch). You may need to turn this off in alternative keyboards. Vibrations on button press, unlock, etc will use power for the vibrating motor. This includes vibrating for a call or text.
Button Sounds: Switch this setting off (Settings->Sound->"Dial pad touch tones"; "Touch Sounds"; "Screen Lock Sounds"). Speakers are small electro-magnets and require energy to move, consuming a small amount of power.
Sync: The more frequently your apps sync the more energy will be consumed. Turn off unnecessary syncs and reduce excessive syncing (Settings->Accounts & Sync->...) Alternative apps such as Juice Defender and Tasker can be used to control sync settings. Some ROMs are now incorporating this feature as well.
Antennas: The short of it: Use Wifi as often as you can, it scans for a connection less often than mobile data. BT, and GPS antennas use very little power when idling. This is the most often confused aspect of battery life. Read more in the "Nitty Gritty" section.
Live wallpaper: Requires greater CPU usage to run, and currently ICS lags in this CPU processing, as demonstrated when switching an older phone over to ICS and finding lag in the wallpaper.
Widgets: Higher refresh rates, sync intervals and greater changes in the widgets will consume energy more rapidly.
AMOLED Screen consume less power when displaying black.
Auto Rotate uses greater CPU and changes screen.
Apps for reducing battery usage:
Juice Defender - Very easy interface for switching wifi/bt/3g/etc on and off to save battery. Great first start. WARNING: Some users report greater battery consumption when USING juice defender. This may be due to certain settings they have or the app itself.
Tasker -Much more advanced, and less user friendly application for automating processes on android. Can be used to closely control the behavior of your phone.
Table of Contents:
1. Quick Tips
2. Monitoring Battery Usage
3.The Nitty-Gritty Details
4.Frequently Asked Questions
5.References
6.Changelog
Battery Monitoring
Standard Android OS Battery Usage Utility
Settings -> Battery
When entering this section, you will see two distinct sections:
Battery % graph, which shows the amount of battery used since unplugged, as well as a time on battery.
Individual App/Process battery usage. The Percentage here corresponds to the amount of battery used by the App/Process of the already used battery. NOT the total battery capacity.
Clicking on a process or app will bring up more details on that process. Some definitions used are as follows:
CPU Total - Total CPU usage in time
CPU Foreground Total - Total CPU usage while app is visible to user
Keep Awake - Total time app prevented phone from going into “Deep Sleep”
Screen on Time - Time screen was active (duh...)
Time on - Time process has been running
Battery Monitor Widget
I highly recommend this app. It gives you a wealth of information.
Battery % usage over very long periods of time
Battery voltage recording
Battery drain (mah and watts)
Battery capacity estimates (both in time and mah)
Battery conditioning status
Support for multiple batteries
Estimates for various conditions (watching video, audio, games, etc)
CPU Spy
I use this for one purpose: to see how much time my phone spends in each CPU frequency. And more importantly, how much time it is in deep sleep. Deep Sleep is the condition in which the phone suspends as much activity as it can. This is the lowest consumption state your phone can be in... besides being off
Table of Contents:
1. Quick Tips
2. Monitoring Battery Usage
3.The Nitty-Gritty Details
4.Frequently Asked Questions
5.References
6.Changelog
The Nitty Gritty
The key here is to think back to physics class. We have an energy storage device, and a few devices that consume energy and varying rates (power - NRG/Time)
Kernel Stuff
Adjusting Clock Speed - CPU and GPU frequenxcies will directly effect energy consumption when in use. That is to say, if your phone is just idling with the screen on, the CPU is using very little power. Much more is being eaten by the screen. There are two approaches to saving power in clock speed, both of which aim to reduce the time spent at higher frequencies.:
Reducing maximum clock speed.
Using cpu governer that keep the CPU at lower frequencies for longer periods of time. Power save, conservative, smartass, etc take different theories as how to achieve the best ballance between performance and energy efficiency.
[TIP] Use CPU spy to check much time the CPU spends in each frequency, and more importantly in deep sleep.
Adjustiing CPU Voltages - Using a kernel with an unlocked voltage table and setcpu to specify voltages for each individual frequency can lead to significant power savings from the CPU. When experimenting with voltages, do not check “set at boot” until you have established stable voltages.
Suggested Voltage testing: Coming soon...
Antennas
Wifi
Consumes more energy per time when trasmitting than mobile data, BUT...
Takes less time to transmit data, espescially large files, so it consumes overall less energy.
Wifi scans for a connection and pings the router less often than mobile data, thus consuming less energy at idle
Bluetooth
Consumes a small amount of power at idle to connect to new devices
Scanning for deveices consumes more energy
While connected, very little energy is consumed unless data is transmitted.
GPS
Unless an application specifically invokes the GPS antenna, it will not consume power
Using constant GPS updates (as in Navigation apps) will consume a large amount of power
Some apps will have bugs in them which will keep GPS on indefinitely. Try reinstalling those applications first, then remove if necessary.
Mobile Data
2G antennas consume the LEAST amount of energy at idle, but because they take so long to trasmit data, they can kill your battery.
3G antennas are Ok at idle, but take less time to transmit data, so are the best all around for traveling around metropilitan areas.
4G Antennas are FAST, but consume the most power. Best to leave these off when in transit, and used for stationary, stable connections
All Antennas consume much more power idling in areas of bad reception. So if you know you're going somewhere with poor reception, and don't need data, turn it off until needed (Settings->Wireless&Networks ->More ->Mobile Networks-> "Data Enabled"; "Data Roming" OFF; "Use Only 2G Networks"
Radios
Radios control how your phone connects to the mobile network. Specifically which proticols to use in which regions as well as how often to try to reconnect. This can lead to better or worse battery, signal, and network speeds.
Code:
NOTE: The Baseband is defined by 3 sets of codes. The first two are the Country Code, the next 2 denote the Year and Month (KK = 2011 November) and the last number denotes the Revision.
Country Code:
CE---> Belgium, Luxembourg, Netherlands
DC---> Thailand
DD---> India
DX---> Indonesia, Malaysia, Philippines, Singapore, Vietnam
DZ---> Malaysia, Singapore
JA---> South Africa
JC---> Algeria, Morocco, Nigeria, South Africa, Tunisia
JP---> Arabic, Algeria, Egypt, Iran, Iraq, Kuwait, Morocco, Nigeria, Oman, Pakistan, Saudi Arabia, Syria
JV---> Tunisia, Turkey
UG---> North America
UH---> Latin America, The Caribbean
XE---> Bulgaria, Estonia, Kazakhstan, Latvia, Lithuania, Russia, Ukraine
XX---> Austria, Belgium, France, Germany, Hungary, United Kingdom
XW---> Austria, Belgium, France, Germany, Hungary, Italy, Nordic, Spain, United Kingdom
ZC---> China, Hong Kong
ZH---> Hong Kong
ZS---> China, Hong Kong
ZT---> Taiwan
Table of Contents:
1. Quick Tips
2. Monitoring Battery Usage
3.The Nitty-Gritty Details
4.Frequently Asked Questions
5.References
6.Changelog
Frequently Asked Questions
Q: I just flashed a new rom or update, could that be the cause of battery issues?
A: Absolutely! A bad download, experimental features, or even settings that are not friendly with your device can greatly impact your battery life.
Q: What battery life should I expect out of my device?
A: That level can vary widely by usage. Generally, screen on time of 4+ hours is considered good.
Table of Contents:
1. Quick Tips
2. Monitoring Battery Usage
3.The Nitty-Gritty Details
4.Frequently Asked Questions
5.References
6.Changelog
References
References:
Better Battery Stats - http://forum.xda-developers.com/showthread.php?t=1179809&highlight=battery
Battery Calibration The easy way - http://forum.xda-developers.com/showthread.php?t=1024867&highlight=battery
Tasker Sync Control - http://forum.xda-developers.com/showthread.php?t=1031743&highlight=battery
Tips Battery Usage - http://forum.xda-developers.com/showthread.php?t=1374133&highlight=battery
SetCPU - https://market.android.com/details?id=com.mhuang.overclocking
Autostarts - https://market.android.com/details?id=com.elsdoerfer.android.autostarts
List of Battery wasting apps - http://forum.xda-developers.com/showthread.php?t=1251897&highlight=battery
Build.prop & init.d stuff - http://forum.xda-developers.com/showthread.php?t=1289554&highlight=battery
Battery monitor Widget - https://market.android.com/details?...d_apps#?t=W251bGwsMSwxLDEwOSwiY2NjNzEuYm13Il0.
System Tuner - https://market.android.com/details?...eloper#?t=W251bGwsMSwxLDEwMiwiY2NjNzEucG13Il0.
CPU Spy - https://market.android.com/details?id=com.bvalosek.cpuspy&hl=en
Juice Defender - https://market.android.com/details?...xLDEsImNvbS5sYXRlZHJvaWQuanVpY2VkZWZlbmRlciJd
Changelog
Code:
12/19/11 Basic Guide structure, info, etc
12/27/11 Added notes for current GNex issues; updated Nitty Gritty w/ antennas; added guides for settings.
Very nice thread. You might want to mention JuiceDefender as well, as that's a really useful utility too.
wanderfowl said:
Very nice thread. You might want to mention JuiceDefender as well, as that's a really useful utility too.
Click to expand...
Click to collapse
Thanks, added that and tasker to the first post as apps that can help save battery
why many posts...
Hey instaed of reposting everything can you try putting all together in one post..???
I think this should be mentioned:
USE WIFI!!!
Using 3G uses about double the battery of wifi. Using 4G uses about triple the battery of wifi. If there is wifi near you, use it! Use wifi at work and at home if at all possible.
Sent from my Galaxy Nexus using XDA App
You should also mention this on-going issue with battery life:
http://code.google.com/p/android/issues/detail?id=22878
For what its worth, my preliminary experiments seem to be showing that on the Galaxy Nexus, JuiceDefender uses more battery than it saves. FYI
is there any way to turn off the media server?
my battery is very inconsistent and at times I have horrendous drain
Not that it'll mean much, but Wi-Fi is the battery saver on this phone for me.
Light use all day, screen at 100% (which I turn off manually every time before putting it down)
E
verything on but bluetooth
Did some MP3 playback (2 hours), Lots of Tweetdeck, some maps - all while actually NOT on wifi (about 3 hours total) - the rest of the time I was at home.
I got about 18 hours before the phone shut off from a dead battery. The same without Wifi with 3G only would net me 8'ish. With 4G about 6ish - all with screen set to Auto.
So my casual and un-scienitific observation for my phone shows that there is something to be said about using WiFI instead of cellular service. I'll try and narrow it down further this week since I'm on vacation.
matt2053 said:
I think this should be mentioned:
USE WIFI!!!
Using 3G uses about double the battery of wifi. Using 4G uses about triple the battery of wifi. If there is wifi near you, use it! Use wifi at work and at home if at all possible.
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
Absolutely! Added a note for it, and a section in "Nitty Gritty" about all the antennas.
gogol said:
You should also mention this on-going issue with battery life:
http://code.google.com/p/android/issues/detail?id=22878
Click to expand...
Click to collapse
Added, thank you!
wanderfowl said:
For what its worth, my preliminary experiments seem to be showing that on the Galaxy Nexus, JuiceDefender uses more battery than it saves. FYI
Click to expand...
Click to collapse
I had the same experience, but I like Tasker for finer grain control anyway. The main thing to be weary of is Location-based settings. Tasker has a guide called "Location Without Tears" to explain it.
jnyce87 said:
is there any way to turn off the media server?
Click to expand...
Click to collapse
Not currently. You could freeze it through titanium backup, but that would break a bunch of apps. Some devs are working on fixes for this and Android OS
jnyce87 said:
my battery is very inconsistent and at times I have horrendous drain
Click to expand...
Click to collapse
All Three attached photos show pretty good battery life. Keep in mind: for a device early in its development, 12 hours is great!
Sal Khan said:
Not that it'll mean much, but Wi-Fi is the battery saver on this phone for me.
Light use all day, screen at 100% (which I turn off manually every time before putting it down)
Everything on but bluetooth
Did some MP3 playback (2 hours), Lots of Tweetdeck, some maps - all while actually NOT on wifi (about 3 hours total) - the rest of the time I was at home.
I got about 18 hours before the phone shut off from a dead battery. The same without Wifi with 3G only would net me 8'ish. With 4G about 6ish - all with screen set to Auto.
So my casual and un-scienitific observation for my phone shows that there is something to be said about using WiFI instead of cellular service. I'll try and narrow it down further this week since I'm on vacation.
Click to expand...
Click to collapse
Thank you for the perspective. I've added some sections referencing these issues.
I've been really surprised with the reviews about the battery life. So far I got the phone for a month ( in UK) and battery life is pretty good.
I have sync accounts, use the phone moderately (about 3 to 4 hours with screen on per day), no battery saving app or anything.
My daily routine is to unplug my phone from it's charger a 7am and every day I end up at night around 11pm with a battery around 40%... Some day I will forgot to plug it at night and be able to have it last almost for the entire next day (being careful though)
first week wasn't so good but after a few days battery improved significantly.
to me the key to save tons of battery life was to set the screen brightness to the second lowest level. It's really bright enough to my taste and literally since then I never got the phone to drain off within 20 hours after a full charge.
Also I have the wifi always on as mentioned earlier on the thread.
I have the GSM Nexus. I have had the phone for 1 week. My phone for phone calls, which drains the battery pretty quickly has not been real heavy as of late, but I have been typically seeing a 3% drop per hour of use. So right now I am at 78%, and have been up for 6h 48m.
Overall I am very happy with my battery life.
JOHN
Tubes6al4v said:
The key here is to think back to physics class. We have an energy storage device, and a few devices that consume energy and varying rates (power - NRG/Time)
...
Reducing maximum clock speed.
Click to expand...
Click to collapse
Is this really a good idea? Consider the following:
Higher clock speed means getting things done quicker. If the phone is running at 1400MHz with a voltage of 1225mV for one second, instead of running two seconds at 700MHz with a voltage of 900mV, what will demand the most energy?
(Voltages are the ones I'm using on my OC/UV'd Nexus, not the stock ones which are *way* high)
I'd rather focus on lowering the CPU voltage as low as it goes without instability than waste time with a slow phone
If i use my GNex normal i charge every two days, i like maximum display
They were sayn that wifi saves batt up to 50%. Ive always been told the exact oppisite. Wifi kills batt life. Wtf
Sent from my SPH-D710 using xda premium
harley1rocker said:
They were sayn that wifi saves batt up to 50%. Ive always been told the exact oppisite. Wifi kills batt life. Wtf
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Depends on distance/strength of wifi signal...
It's a good way for them convince you to not use your data connection for a while and slow down the network.
Sent from my Super Galaxy'd SPH-D710
I got an email/text or statement insert saying the exact same thing. Funny thing is ever since that statement I have always made sure to have wifi on when home.
I know it sorta turns off when disconnected but then it scans and picks up wifi networks so I just turn it off when I leave the house.
On my OG Evo I did not notice any change in battery life with wifi on.
Searching for WiFi is what really kills the battery which is why I turn mine off and on manually rather than leaving it on. If I'm in an area with WiFi available and my 3G signal is low, then I'll turn on my WiFi, also when I'm at work or home my WiFi is always on but if I'm out and about then I keep WiFi off rather than have it drain my battery constantly looking for signal.
Technically, I think Wifi takes up less battery than, say 3G when actively used.
Just a guess o-0
MochaCharok said:
Technically, I think Wifi takes up less battery than, say 3G when actively used.
Just a guess o-0
Click to expand...
Click to collapse
I would think this is true, especially if you're sitting close to the router like at home or work rather than pinging off a cell tower however far away.
It goes both way guys. When idle, wifi consumes more battery than an active cellular data connection.
By virtue of simply being more efficient, wifi consumes "less" when actively using it. This is, however, because of the generally increased data speeds: it takes less time to accomplish a task (I.e. downloading a file), thus providing battery savings. In this regards, even 4g consumes less battery, even though it technically takes more juice to run 4g.
The way to really look at it so it becomes clear is say, hypothetically, you had a wifi connection whose internet side connection was very slow. In this regards, wifi doesn't save you any battery, and will probably end up consuming more, simply because its gain in efficiency is now gone.
Of course sprint wants us to get off cell data as much as possible, but in a lot of real world situations, it will save someone battery. Take my typical work day for example:
I wake up at home, drive to work, stay at work all day, then go home and probably stay there. I have good wifi connections both at home and work. Now, if I was the kind of user that didn't auto sync anything, I would probably end up using more battery life than I need to if I left wifi on all day, simply because I'm pumping juice into a radio that isn't being used.
However, I DO use a lot of auto sync functions, which means that my phone is actively using data a lot throughout the day. In this case, the battery drain due to the time in which wifi is left idle is out-weighed by the gain in battery life I get by the times my wifi is now being used instead a cell connection.
In a nutshell, as I said at the beginning, cellular data connection is more efficient at being idle than wifi (provided it's a good connection), and wifi is more efficient at being actively used (again, provided it's a good connection and the internet-side speed is sufficient).
Sent from my SPH-D710 using xda premium
My battery last far longer on wifi than 4g, not even close in my book.
Since I have wi-fi at work and home I can say there is a HUGE difference - especially since at home and work the 3G/4G signals are so weak that the phone burns quite a bit of battery just searching for a signal. Hoping that this will change as NV completes in the area but it might be the frequency that we're on is not too friendly with the newer building materials.
Yes, using wifi will save you more battery life than using your 3g/4g
Pastie13 said:
My battery last far longer on wifi than 4g, not even close in my book.
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4g is a completely different animal than 3g when it comes to battery drain. So far when on 4g your battery life is sucked out of your phone. The email Sprint sends out I would safely say is comparing 3g to wifi.
That same tip is on Sprints website when you log into your account. It is on the right hand side.
As for battery life my findings have been WIFI uses less juice when the signal is good. 3G uses less juice when the throughput is good. So when I am on 3G in an area that has good speeds I can hit near 30 hours of battery.
I can do the same on WIFI when the WIFI signal is good, but if the WIFI signal is on the lower end the throughput slows since the quality has been lowered.
So in essence the better the throughput the better the battery, because when the phone wakes to check on any sync items setup the longer it takes to make that check the longer the CPU is at max and the more battery drain occurs. And I'm not talking signal strength for 3G since you'll get more drain on the battery in lesser areas because the phone is naturally going to have to boost the transmitter power. I'm talking best signal and crappy 3G network throughput. That is where the drain comes from.
I have tested this in my house with my WIFI and my Airave. On WIFI if I go outside my WIFI range is really bad and my battery drains a lot quicker. If I turn off the WIFI and use the Airave, which has a much higher transmitter power, I can get great battery. I have also seen this in over night testing. My WIFI is in the living room which is 5 walls away and the signal is pretty poor. If I leave my WIFI on over night and not charge my phone I loose 50% battery and when trying to use my phone for internet I get super bad throughput since I am on the edge of the signal. But turn off my WIFI and ride on the Airave I only loose 15% over night and the internet is great, but limited to 1.5m since it is 3G. So if you download a 1meg attachment. 3G takes 2 min and WIFI take 4 min then 3G will use less battery. This also goes vis versa. Whoever is maxing the CPU the longest is your battery killer because both are always on and always ready when they are selected.
Hope I didn't go into to much detail, but transmit power is not the big thing here it is throughput quality of the signal. The worst the throughput the more time it takes to transmit and thus more battery as the CPU is maxed till the job is complete.
Hey,
when I use 3G I get about 2H of screen time,
and when I use WiFi I get about 4H (max).
My usage is WhatsApp, Browser etc..
Is it normal that I'm getting half of the time with 3G?
Can it be fixed with another baseband?
Any help?
3G uses more battery since it's also searching for better connection all the time(unless you choose 2G only in mobile network options, then you get better battery but speed is not so fast anymore).
I can confirm that a weak 3G connection gobbles up battery charge very quickly. This is a flaw in the radio firmware or perhaps somewhere else. Of course the phone should switch to 2G automatically when 3G is not used intensively, but uses excessive amounts of electricity, but the designers apparently overlooked this.
Your main option is, as already mentioned, to do the thing manually that your phone fails to do automatically—force 2G only.
If you do that, don't forget to disable the force-2G option again when (a) you need the higher speed and the connection is good enough for that, or (b) if you moved into an area with better reception, like 3 or 4 bars.
Alternatively, leave the settings untouched, i.e. 3G enabled, and keep charging the phone if you are stationary and have electricity nearby. You can charge from a computer, albeit at half speed.
I almost always have 3/4 bars, so I don't think I have a connection problem.