Hi,
all Rom threads have a rather big amount of discussions about battery life. It seems battery life varies between 8 hours to several days. Several reasons for this are addressed and one might check this first before anything else
1. Usage. If you use your phone you discharge it. Use it heavily with all whistle and bells turned on and you discharge it quickly.
2. Apps. Some apps like to phone home, sending or fetching frequently data. For some apps this is obvious. However, some might be hidding this or they are just bad programmed.
Using Powertutor and juiceplotter help to identify those battery eating apps. E. g., VoIP- or Mailclients, etc. are candidates being for battery sucking monsters.
3. Signal reception might make a different. The radio modules trying to minimize the sending power to save battery. If you put the phone in an box, bag or whatever the radio module might switch to a higher sending level to reach the cell tower.
In general you can't do much, simply choice "good" locations wherever possible.
4. Cell search and switching. Using a train or any other fast moving vehicle might require to switch very frequently between different cell towers. Every switch consumes power since data will be exchanged. If no cell signal is found the phone starts searching for one which consumes more power. Switch to flight mode if possible.
This are already steps which helps to safe a big chunk of the batteryand all this steps are completely rom independent.
In my opinion roms might contribute only to a small amount to the battery power. Maybe there is a buggy program or some settings are not optimized. However any more or less stable Rom should result in a rather similar battery life time.
Same is true for the kernel. Sure undervoltage, different schedulers, etc. might all change something regarding the power consumption. However this could not explain this very different reported battery life times. Its more in the range of +- 2 hours.
I know it was discussed sometimes already. I believe that some reported battery problems are due to a wrong combination of libs and settings for the used radio module.
Many people upgraded to the newest radio, however the local carrier might slightly modified settings to there specific needs. Furthermore, the might use a special tailored library enhanced by functions for there particular network.
This was given, at least for the Japanese carrier Softbank.
build.prop contains some special calls and a look into the library libhtc_ril show corresponding functions.
If roms carrier a different version of libhtc_ril and does not call settings in build.prop people on the particular carrier might observe battery drains.
Even worth the present situation creates random combination of radio firmware, build.prop, and libhtc_ril.
What might be needed is a installation routine for a Rom, which is capable to modify and replace above mentioned files for the given carrier.
I know that this would work since I'm doing it manually every time I install a different rom.
Would be glad to hear other opinions on this topic.
sure, the use of my phone make different battery drain but with the same use, this same battery drain change with the rom installed in this same phone! and the radio or the kernel of this same rom can make also difference in the battery drain (cf DeFroST for exemple...) with a scale between 8 and 20 hours!!! so i think the rom have a lot importance in battery drain ;-)
Hi,
I think one has to differentiate between an potential bug in a rom which might drain the battery and a "stable" rom.
From the technical point you can tweak rom and kernel to the max but this would never result in 4 times longer battery.
I would not say thay you can't get a kernel highly optimized for performance which might drain much more. However, in general all roms come with power-savvy kernels the small differences between those kernels could in my opinion not make such a big differences.
Same is well known for laptops. Sure a stock kernel might drain faster but even if I tweak out the very last options in the kernel settings I could never improve battery life time by 400%. That would be instead of 2 hours my laptop would suddenly hold 8 or more hours.
I belive the same is true to roms. There are some which emphase light the use of light apps and avoid animations and other battery eating eye candy. However, it can't result in an difference of 3-4 times, unlike something is simply wrong within the rom.
The main point is, nobody seems to give attention to the different modifications different carriers introduce in stock roms.
Thus, using a rom for which libs and settings come originally from T-mobile UK might fail heavily for Softbank Japan, or Verizon US.
What would be needed is
1. Awareness of the different carrier-based settings.
2. An application which is capable to modify and replace the mentioned files specific for the used carrier.
Definitely,the battery life should be associated with ROM.The models of running ROM are different-----how the SD card works..
Related
Hey people,
following on from artisticcheese's thread about battery consumption Ive performed a few tests on some different radio versions to see what the actual difference in battery consumption is.
Right now (as of 16-01-2008) I recommend the following radios:
1.47.30.10 with an overall score of 1.22 (the highest in the test)
or
1.54.30.10 with an overall score of 1.21 (2nd place).
Remember people, if you are planning on changing your radio version, flash hardspl, and make sure nothing is running which will interrupt the flash process. The radio flash is still the most risky of all flash processes and it is possible to kill the device so be sure before you flash. In doing these tests I performed over 10 radio flashes in a day and i made usre nothing CPU intensive was running on the PC and that i wasnt going to unplug the USB by accident etc...
-------------------------------------
Test Run 16-10-08:
Before running these tests the phone was soft reset, ALL today plugins shut off (apart from x button), internet explorer for downloding and acbPowerMeter for power monitoring.
All tests again running on WM6 "V3 cabb'd III".
This set of tests is the following:
Test 1: GSM mode, backlight off, downloading for 5 minutes.
Test 2: UMTS mode, backlight off, downloading for 5 minutes.
The results vary and a pattern ive noticed is radio versions 1.47.30.10 and 1.54.30.10 seem to have the same behaviour in GSM modes, perhaps the extra ".30" in the version number denotes a particular tweak or feature??
Radio_Power_Tests_16012008.zip
Enjoy.
-------------------------------------
Inital test run:
Using a freshly flashed version of my "V3 cabb'd" ROM which is a tweaked version of pandora naked 6 3.60 ROM with nothing installed so a lean install and using acbPowerMeter I ran the following tests on each radio rom:
Test 1: Backlight off, automatic standby disabled, all processes stopped using start>settings>system>memory. GSM only and phone left on idle.
10 minutes and average current consumption recorded.
Test 2: Same as test 2 , UMTS only.
Ive taken a screenshot of the data with magicss and normalised the results so the earliest radio version tested is the baseline score.
The results of the first test are in the attached spreadsheet and screenshots.
Conclusions:
The results show that overall the differences are neglegable for these tests, however I still believe there is a major difference in practice. So the next load of tests I propose will test the power consumption with data connection attached. Somehow I want to test during a call or download since the HSDPA power consumption is likely to be a BIG number.
how comes you didnt test the latest radio versions? *waits for more results*
nice idea though
each test involves flashing a new radio (20 mins-ish) and two ten minute test runs...I need to use my Tytn today so can probably try the other radios later on, it takes a fair ammount of time for each one so i only went from the ground (1.43.00.00) to the one currently on my device (1.47.30.10) last night. I abandoned doing the later ones until ive figured out a worthwhile test to run for ALL versions. Ive presented my findings so far to show that essentially the 4 versions i tried are identical under idle conditions...not really a true to life test.
..big thanks to u bro! ..awesome work as usual..
mrvanx said:
each test involves flashing a new radio (20 mins-ish) and two ten minute test runs...I need to use my Tytn today so can probably try the other radios later on, it takes a fair ammount of time for each one so i only went from the ground (1.43.00.00) to the one currently on my device (1.47.30.10) last night. I abandoned doing the later ones until ive figured out a worthwhile test to run for ALL versions. Ive presented my findings so far to show that essentially the 4 versions i tried are identical under idle conditions...not really a true to life test.
Click to expand...
Click to collapse
Yeah, I think it will be the 3G call and HSDPA tests where the benefit of testing will be found.
My own tests show little difference in the idle power consumption.
I made very good experience with 1.41.00.10.
Good signal and low power consumption!
I've changed from 1.54 to 1.48 and I can honestly say my phone goes another day or two without charging!!!!!!!
Im gonna do some more tests tonight on the new format probably with some sort of download running (web n walk is usefull hehe).
So i'll post some more results later on if i can.
The best radio rom I've ever used
I tried many different radio roms for my Jasjam, believe me the best radio rom I've used regarding to power usage and signal is 1.46.00.11.
Even when using UMTS and 3G, in other radio roms; when connecting to internet with my laptop, I mean using Jasjam as access point to internet , the battery drains fast even if the Jasjam is connected to charger. but in this radio rom, when the charger is on, the battery stays stable and the Imate can also get charged. I know that this radio rom is designed for Trinity which is GPS enabled, but I am telling my experience. THANKS
For your testing goodness, here are pretty much all the radio roms I have ever come across.
http://www.crc.id.au/files/xda/Radio_Roms/
They are in .nb format - so you'll need to use Duttys tool to get them into .nbh files.
The power consumption is definately related to voice call usage.
My normal usage in a day means I use about 50 - 80% of my battery.
Whilst away in Tenerife I used my phone exactly the same but without making voice calls and I only used 50% after 3 -4 days.
This is certainly true. I was away in a place with no mobile coverage (no GSM or UTMS) and using the device for GPS navigation only I was able to get 2-3 full days out of the standard battery.
What is necessary to detect the correct battery consumption?
Something like this: http://www.vandenmuyzenberg.nl/PowerGuard/ ???
Should I use this tool?
matar said:
What is necessary to detect the correct battery consumption?
Something like this: http://www.vandenmuyzenberg.nl/PowerGuard/ ???
Should I use this tool?
Click to expand...
Click to collapse
Both threads you have posted in have shown you the program that is to be used. Why do you keep asking?
Starfury said:
The power consumption is definately related to voice call usage.
My normal usage in a day means I use about 50 - 80% of my battery.
Whilst away in Tenerife I used my phone exactly the same but without making voice calls and I only used 50% after 3 -4 days.
Click to expand...
Click to collapse
Experienced exactly the same thing when I was in Majorca. Even though I did use the phone a lot for sending as MMS (as that was free for me) I still got more usage out of the phone in Majorca if I had done pretty much the same usage pattern over here (UK) and that is because I suspect there transmitters put out a stronger signal, which means the phone has to 'work' less to get a stronger signal.
Starfury said:
Both threads you have posted in have shown you the program that is to be used. Why do you keep asking?
Click to expand...
Click to collapse
Sorry for double posting, but I read that those tools doesn't show the correct consumption because they needs power themselves and therefore distort the result... Maybe somebody can confirm this? Thank You.
A very good point. I've known the radio kicks up the power when you have a low signal, and if it's lost - I turn off the radio until I get back to a good area or it really kills the battery fast.
Just thinking here, but to add another level of complexity to the testing - while statically measuring power drain without moving the device will give repeatable results, could a radio power draw "react" differently to signal strength variations, and not be as "efficient" compared to others while on the move (typical usage)?
For example, if the signal goes above 50db (no idea if I'm even using the correct scale here ) it incrementally increases power by 20% for 10 seconds each until an "acceptable" signal level is reached. Once this is achieved, will it reduce back down - say you came around a building an now have a better signal? How long will that take? Will some radios respond more rapidly than others - optimizing power usage vs signal strength?
Dammit Matt! Now you've really got me thinking
In a bit of the background on this, the GSM/UTMS protocol allows the base station to tell the mobile to increase or decrease the transmit power of the phone. This allows it to tune the performance of the phones radio to get the optimum signal level at the cell site. It also helps a heap in deciding what cell towers to jump between and all the critical handoff levels and names.
Much more info can be found:
http://www.patentstorm.us/patents/5357513-description.html
There's a lovely paper about it all here - but I don't want to pay for it
http://www.actapress.com/PaperInfo.aspx?PaperID=18185&reason=500
power useage is down to lots of different factors, one of the main culprits is use of HSDPA/3G and it bounsing up and down between it and GSM when the local Cell doesnt support it or has a weak signal.
I can't believe the statement made above about the battery being used quicker when you talk, of course its going to drain quicker, its permanently transmitting for gods sake
It also depends on how strong the signal to the nearest cell/Base Station is, if its a week signal then the radio/phone will bounce around to find a stronger one, I believe typically a phone will register with up to 3 base stations to enable you to auto switch between cells when you move.
if you're really bored and want to dig into how GSM works heres a starter for 10
http://www.fci-cu.edu.eg/INFOS2005/presentation/GSM_Concepts.pdf
If you want to test weak signals stick your phone in a tin box, assuming this doesnt kill the signal totally then the phone should start ramping up its power output and sucking the battery dry quicker.
My point was made in reference to the testing of the phone to see what uses the most battery and indicating that we should direct our testing at the phone application over any others.
I've been seeing sporadic posts in different threads about battery consumption in WM6.1 ROMS.
Well, it turns out that since starting to use WM6.1, I've noticed a dramatic decline in my battery life. I can maybe squeeze out a day of use with minimal use. If I use HSDPA / Voice / WiFi - forget it, I get 1-2 hours before the battery drops to nearly zero.
I used to get much better life out of my battery before.
I tried playing with different ROMs, then different Radio version - to no avail - battery life sucks.
Any tips / ideas / comparisons on how to get reasonable performance with WM6.1 or is this just my battery having issues?
I think this would be more your device...
To check this, go back to your manufacturers ROM, and see if the same still happens. Also try this test with no 3rd party applications installed.
Poor battery life is usually cause by either:
1) Applications using 100% CPU
2) Faulty ROM
3) Faulty Phone or Battery.
If you're tried multiple ROMs, I'd say you can rule out #2.
I get around 2 1/2 days out of the stock 1350mAh battery on my hermes.
Hi
ygeller , i had some battery life problems with my hermes and i found on another thread some ppl saying to first flash the ATT rom RUU_Hermes_CINGULAR_WWE_3.62.502.3_6275_1.54.07.00_108_UOOS_SVN05_Ship
and then the cooked one. That worked wonders for me, the radio version 1.54.07.00 is the best i tryed so far for battery life and network stability.
I'am using the latest PDAViet rom and no problems so far, with battery holding for 2 to 3 days with normal use.
ygeller said:
I've been seeing sporadic posts in different threads about battery consumption in WM6.1 ROMS.
Well, it turns out that since starting to use WM6.1, I've noticed a dramatic decline in my battery life. I can maybe squeeze out a day of use with minimal use. If I use HSDPA / Voice / WiFi - forget it, I get 1-2 hours before the battery drops to nearly zero.
I used to get much better life out of my battery before.
I tried playing with different ROMs, then different Radio version - to no avail - battery life sucks.
Any tips / ideas / comparisons on how to get reasonable performance with WM6.1 or is this just my battery having issues?
Click to expand...
Click to collapse
Please try another radio, i used always the newest en I got the poorest battery performance! Now I use 1.47.30.10 in combination with PDAVIET roms and now my battery holds a day of 2/ 2,5!!
u are not alone
Hi ygeller,
me too have similar issues pls visit http://forum.xda-developers.com/showthread.php?t=392831 for details...
I have issues with charging too with my phone never charging full no matter how long i keep the charger on it get's stuck at 80%...
But good news is that I've arrested the drain now i flashed the PDAcorner pr0 V3 yesterday and through the entrire night the drain was less that 1% but it hasn't solved the drain if I use voice/data cause an 11 min call had my battery coming down from 63% to 16% ..
I guess i am gonna try and flash the stock ROM as compumad says..
I guess at least the charging issue is due to faulty ROM ( i hope)..
Thanks guys for input..
I agree that I get better battery life with the 1.47.30.0, in addition to aquiring a signal faster. The BIGGEST fix for me however was replacing my year old battery with a good quality Li-ion battery. Now I go a full day with hardly any drain using anybody's ROM, of course YMMV
I am having the same experience. I tried several WM6.1 ROMs and they always drained the battery within 1 day. I am back on Schap's ROM now and I can work for up to 3 days with HSDPA and BT on. About 1 month ago I returned my Hermes because of a defect and HTC replaced the complete inner life of my phone. So this can be compared to a more or less new Hermes.
As a comparison, I recently received a Wizard as a gift and flashed it with the WM6.1 ROM of SNN and believe it or not, the battery lasts for amazing 5 days! And that is with GPRS and BT on!
So, are we talking a major device issue, a ROM issue or is there something I'm missing here?
froos said:
I am having the same experience. I tried several WM6.1 ROMs and they always drained the battery within 1 day. I am back on Schap's ROM now and I can work for up to 3 days with HSDPA and BT on. About 1 month ago I returned my Hermes because of a defect and HTC replaced the complete inner life of my phone. So this can be compared to a more or less new Hermes.
As a comparison, I recently received a Wizard as a gift and flashed it with the WM6.1 ROM of SNN and believe it or not, the battery lasts for amazing 5 days! And that is with GPRS and BT on!
So, are we talking a major device issue, a ROM issue or is there something I'm missing here?
Click to expand...
Click to collapse
I've been on the current Shamanix`s WM6 Ultimate v2 FINAL [SuperStorage] ROM for a while and indeed the battery drains very quick- I've had to schedule Exchange email to be on for 2 hours now but a simple 20-30 min voice call drains the battery by about 30-40%!
I was on Schap's ROM but was waiting for his latest update. Will have to consider another one.
I have also had the same issue as people here with the battery running down very quickly.I did try going back to schaps 4.31 but did not seems to make a difference anymore.Will try going nack to standard rom and then changed to cooked and post if there is any difference.
are u guys serious? 2.5days out of the stock battery?
my battery is a 1300mAH and i get a week and a bit on standby, constant txting wifi, screwing around, i get at least 4 days.
now that i have a 1650mAH i cant even kill it in a day (wifi bluetooth and gsm all going at the same time)
theres a 3000mAH battery coming in the mail, if im gentle with it it should last.... 0.5 months?
riyazhyder said:
Hi ygeller,
me too have similar issues pls visit http://forum.xda-developers.com/showthread.php?t=392831 for details...
I have issues with charging too with my phone never charging full no matter how long i keep the charger on it get's stuck at 80%...
But good news is that I've arrested the drain now i flashed the PDAcorner pr0 V3 yesterday and through the entrire night the drain was less that 1% but it hasn't solved the drain if I use voice/data cause an 11 min call had my battery coming down from 63% to 16% ..
I guess i am gonna try and flash the stock ROM as compumad says..
I guess at least the charging issue is due to faulty ROM ( i hope)..
Thanks guys for input..
Click to expand...
Click to collapse
you need to resync your battery circuit, charge your phone till your phone cant charge it anymore, then drain it till you cant even turn it on (no lights at all), charge it up again and it should be reading correctly.
here is more info about Li-ion and Li-Poly charge circuits.
see subheading "Guidelines for prolonging Li-ion battery life"
http://en.wikipedia.org/wiki/Lithium_ion
I also had a severe battery drain with several 6.1 ROMS. My main culprit was caused my certain applications not closing properly and running at 50%-100% CPU. The main apps were Internet Explorer, Windows Live, Poutlook, basically network based apps. For some reason the app wouldn't show up as running. It wasn't until I got a new task manager that showed "processes" that I found the culprit. I would make sure all these processes were "killed" and my battery life lasted a lot longer.
I eventually went back to a 6.0 ROM, as I couldn't take all the problems.
pr5owner said:
you need to resync your battery circuit, charge your phone till your phone cant charge it anymore, then drain it till you cant even turn it on (no lights at all), charge it up again and it should be reading correctly.
here is more info about Li-ion and Li-Poly charge circuits.
see subheading "Guidelines for prolonging Li-ion battery life"
http://en.wikipedia.org/wiki/Lithium_ion
Click to expand...
Click to collapse
Unfortunately, I've done that without planning. I am constantly fully charging the phone - then it drains and dies after a few morning phone calls...
This doesn't help...
OK. I am flashing the ATT ROM to see what gives.
Already it's been a chore. I haven't flashed stock ROMs in quite a while - had to extract the NBH file and use in with a cooked ROM wrapper to get it to flash.
Will report back with results.
ygeller said:
OK. I am flashing the ATT ROM to see what gives.
Already it's been a chore. I haven't flashed stock ROMs in quite a while - had to extract the NBH file and use in with a cooked ROM wrapper to get it to flash.
Will report back with results.
Click to expand...
Click to collapse
Have Flashed ATT, then PDA Corner Pro V3. I didn't have much faith in the voodoo of flashing the official ROM to magically repair stuff - and so far I can't say that I've seen much change...
too bad...
ygeller said:
OK. I am flashing the ATT ROM to see what gives.
Already it's been a chore. I haven't flashed stock ROMs in quite a while - had to extract the NBH file and use in with a cooked ROM wrapper to get it to flash.
Will report back with results.
Click to expand...
Click to collapse
You put PDA into bootloder mode and the flash, no need to jumpthrough hoops.
Actually the AT&T Official has repaired numerous bad flashes for me, is a lifesaver.
I have been a user of the stock AT&T WM6 Rom for many months. Before that, I had the stock Cingular 8525 WM5 Rom, and many of the cooked WM6 ones, starting with an early Black, a couple of Custel's, Sleuth's, and a few others. I now use personal derivations of the stock AT&T WM6 Rom that I have been cooking up over the past few months.
I have NEVER had good battery life on my 8525, with ANY ROM at all. Left alone, my battery dies after only a few hours. I have learned to live with this, always carrying a second (charged) battery, and I have chargers at home, at work, and in my car, in order to deal with the issue.
I must ask, when others say they get 2 or more DAYS out of a charge with "normal use", please define what "normal use" is for you.
My "normal use" includes checking 4 email boxes, one of them push, one at at 30 minute intervals, and two hourly. I use PocketWeather, which I have doing updates at 30 minute intervals for 4 locations. 1-calc updates monetary exchange rates daily. I make/receive only a couple of phone calls daily (yes, a BIG battery-killer), and I rarely receive text messages. No MMS at all. I utilize Bluetooth devices during my commutes in both directions, only use WiFi at home (another big battery drainer, but since I'm at home, it doesn't matter). I keep the IR port turned off unless I'm actively using it. I am on the internet with my device every chance I get, using the normal AT&T WAP access point with an unlimited plan.
I feel that with the amount of usage I get out of my device (especially Internet and emails), I can accept the poor battery performance.
But I am curious ... those of you who claim much higher numbers for battery life under "normal usage" ... please explain what "normal usage" means to you. I have never seen anything close to the numbers that have been posted by many.
FWIW, my two batteries are: 1 stock 1300mAh, and one is a Boxwave 1350 mAh. Both are well over a year old.
-pvs
pvs said:
I have been a user of the stock AT&T WM6 Rom for many months...
...I have NEVER had good battery life on my 8525, with ANY ROM at all. Left alone, my battery dies after only a few hours. I have learned to live with this, always carrying a second (charged) battery, and I have chargers at home, at work, and in my car, in order to deal with the issue.
Click to expand...
Click to collapse
I'm forced to agree with pvs. I'm in a very similar situation: I use the stock AT&T WM6 ROM, although I've used a couple of other ROMs and Radios before this.
If I set my 8525 to auto-poll my 4 mailboxes every 15-60 minutes, I always notice a definite decrease in battery life. In the beginning, I'd get the "low battery" notification before I even left work late in the afternoon (this is after getting a full charge the night before). In between then and now, I turned off auto-polling. I couldn't get any new mail unless I did a manual send/receive...but my battery life improved dramatically; I could get nearly two full days' usage out of it before having to charge at night.
I was fairly confident it had something to do with that data-connection required to update the mail, and I feel that it's confirmed: 3 days ago, I found a registry edit that turns off the 3G/data connection after being idle so many minutes (I have mine set to 2 mins). I can now auto-poll my boxes, but my battery life has decreased again...not QUITE as bad as before, but I pretty much have to charge it every night, now.
(Additional "normal" usage for me has always included using Bluetooth for a headset and several calls during the day, varying in length...around 30-50 minutes total talk time, if I had to guess.)
Frankly, I'm surprised at the people who say they're able to leave their data connection on all day (even if it's sending no data in certain moments) and see no appreciable battery-drain. This is my second 8525 and second battery, and my experience has remained the same.
I was going to try and find some sort of push EMail solution...but to make matters worse, I've been doing research and unless I'm misunderstanding things, it looks like WM6's version of "Push EMail" requires that "constantly-on" data connection. I'm frustrated, and I'm seriously considering getting a Blackberry.
If someone can come up with some alternative ideas, I'd love to hear them, but...even though I love my 8525...my patience is starting to wear thin with it.
(ATT WM6 2.15.502.3, Radio 1.40.30.00)
Superion said:
I'm frustrated, and I'm seriously considering getting a Blackberry.
Click to expand...
Click to collapse
If you want to leave your connection on all the time and have a battery for the day and night....Blackberry. My tytn is fun to play with and flash but for my email it's blackberry.
bartybet said:
If you want to leave your connection on all the time and have a battery for the day and night....Blackberry. My tytn is fun to play with and flash but for my email it's blackberry.
Click to expand...
Click to collapse
Good grief. Is this the consensus of everyone? I'd hate to give up my 8525, since it has Windows Mobile versions of what I work with, plus some pretty nifty games and apps...but I want a device I can both work AND play with. So far, the 8525 is falling down on the Work/EMail end.
I've dodged the blackberry for so long because of 1) no touchscreen, 2) it lacks the versatility of a true PC (ideally, PCs can be used for work and play; blackberries seem meant primarily for work). Plus, I don't know if the Blackberry's "push" EMail features will work any better with my particular mailboxes (i.e., it may have to constantly "poll" those boxes as well, which may result in similar battery drain).
BTW: It's noon here, after 3-4 calls this morning (around 25 minutes or so), EMailboxes updating (2 at 30 mins, 2 at 60 mins), Bluetooth off, and having read 2 CNN articles (and closing it right after)...my 8525 is at 70% power. X-(
(ATT WM6 ROM 2.15.502.3, Radio 1.40.30.00)
I had an idea as I was finishing wrapping the last of my Christmas gifts .
I went straight scientific method with this one too
An app needs to be created that will put a constant, equal load on our phones CPU's and with this will be able to accurately determine which kernels are going to give us the best battery life.
Here's where I'm going with this:
You change the setting on your phone so that the screen stays on and put your phone into airplane mode after a fresh flash of a ROM and the desired testing kernel. You make sure that nothing else is running on the phone asides from this app. Run the app until your phone dies and compare with other kernels. Granted, this wont be the same for every kernel-rom combination but I think that it is a good starting point as for some kind of "battery benchmarking app" that we could use to try to determine what is going to work best for the ROM of our choosing.
99 Reviews....No Reply. Friendly bump
i think its a beast idea.
Battery/Kernel stress testing...hmm.... love concept but too many other variables to base results solely on kernel. Maybe possible if those many variables can be taken into effect or results from many different phones, batteries from different manufacturers, different size batteries, etc are averaged. Another issue is that not all kernels are built for battery life..ie..concept of BFS and CFS based kernels.
Great idea and I think this is possible but again variables need to be taken into mind.
devnulldroid said:
Battery/Kernel stress testing...hmm.... love concept but too many other variables to base results solely on kernel. Maybe possible if those many variables can be taken into effect or results from many different phones, batteries from different manufacturers, different size batteries, etc are averaged. Another issue is that not all kernels are built for battery life..ie..concept of BFS and CFS based kernels.
Great idea and I think this is possible but again variables need to be taken into mind.
Click to expand...
Click to collapse
Maybe a stripped down battery testing rom. No radios so that signal strength won't affect the results. Maybe you just run it and see what's best for your specific setup and forget about averaging.
Something very similar has already been done. If I can find the http I will post it. To do what your saying sounds like it would be extremely time consuming and possibly harmful to the phone, depending on the amount of stress you put it under for the time it takes to drain the battery.
Sent from my PC36100 using XDA App
We just need a Prime 95 for android now!
I think you'll run into a problem since different phones handle kernels differently
Just install System Monitor and Battery Info Widget. You can see from System Monitor accurate CPU usage (a little over ~1% idle should be typical) and from Battery Info Widget how much mA's that usage is taking (between -40mA and -120mA is typical for 1%).
definitley seems like a great idea
I love my s3. but once I updated to jb the freaking battery life is so bad.... it is constantly draning withiut me doing anything in it. And today gmail was on the top of the list. I didnt even use gmail today. Can someone please guide me and tell me how I fix this? Do I really need to go back to ics. I go to high school and I never use my phone but still it drains... do I really need to go back to ics? My battery life on ics was amazing but I wantdd this update and now I am regretting this update so much. Please help?
Go to an AOKP rom
Sent from my SGH-I747 using Tapatalk 2
It would be worth gathering more info here before moving on to more drastic steps like flashing another ROM to deal with battery issues.
Can you start by posting screenshots of your battery life screens (go here for some examples of what I mean)? The things I'd personally be most interested in seeing are screen on duration and your wireless connectivity; if you're leaving your screen on and/or you're in areas with poor network connectivity (wifi or mobile), those can both tend to eat into battery life in various ways - for example, e-mail apps (this probably includes Gmail, but as I use other mail apps I don't know for sure) can eat battery life in areas with poor network connectivity in their futile efforts to maintain a connection to the mail server.
Apart from those basic drains, you can get a better idea of what's eating battery life by identifying causes of wakelocks, i.e. what's keeping your phone awake when it should be asleep. BetterBatteryStats is my go-to for this. The info it generates is really helpful for figuring out what applications are eating battery life and how they're doing so.
Hope this is of use.
Flashing a rom is not drastic
It was only a suggestion based on all the reports of battery issues with the official JB release.
Sent from my SGH-I747 using Tapatalk 2
smelenchuk said:
It would be worth gathering more info here before moving on to more drastic steps lik flashing another ROM to deal with battery issues.
Can you start by posting screenshots of your battery life screens (go here for some examples of what I mean)? The things I'd personally be most interested in seeing are screen on duration and your wireless connectivity; if you're leaving your screen on and/or you're in areas with poor network connectivity (wifi or mobile), those can both tend to eat into battery life in various ways - for example, e-mail apps (this probably includes Gmail, but as I use other mail apps I don't know for sure) can eat battery life in areas with poor network connectivity in their futile efforts to maintain a connection to the mail server.
Apart from those basic drains, you can get a better idea of what's eating battery life by identifying causes of wakelocks, i.e. what's keeping your phone awake when it should be asleep. BetterBatteryStats is my go-to for this. The info it generates is really helpful for figuring out what applications are eating battery life and how they're doing so.
Hope this is of use.
Click to expand...
Click to collapse
Icantell you right now I just checked and the kernel wakelock that is preventing my phone to enter deep sleep is msm_otg. How can I disable this?
Some digging on my part suggests that that wakelock is USB-related, though theories as to the cause vary. Some of the suggested solutions I've seen are using a different USB cable to charge the phone, or doing a factory reset.
I know that its irritating for the pros out here to see a question regarding a BEST ROM. But I am not asking such a question.
I would like the most battery friendly rom for my n7100 runnning stock 4.3 now. The 4.3 has ruined my battery life and I am looking for a way out. I would love to get the single handed operation in all windows from note 3 also.
So once more these two are what I am hunting for:
BEST BATTERY BACKUP
[*]SINGLE HANDED OPERATION IN ALL WINDOWS (NOTE 3 FEATURE)
Hope I am specific here. Could you please suggest me the ideal ROM solution for my situation..
I never could understand people claiming that a certain ROM is better concerning battery than the other. OK, ie. if you have Note 3 apps there might be some SLIGHT difference, but this is all nothing compared to the REAL drain caused by the screen and DATA. It also depends what software you use - you could have best battery friendyl ROM but if you install stuff that wakes the phone and consumes the battery - it won't matter. Also depends how you use your phone i.e. if you play 3D games ofcourse your battery will last shorter tme than if you just make phonecalls. When you use "light" ROMs, with much bloatware removed - battery will be a little bit better but you will lose functionality. But all of this is sooooo little that it hardly matters.
On 4.3, as on 4.1.2 - my battery lasts like 16 hours and then is down to 50%, and then I'm in panic to charge. But I just went abroad and turned off my data because of the roaming costs. And guess what? I had my phone on for 2 days, 1 hour screen on time and the battery was at 60%.
So no ROM will save you if you have A) data on B) screen on. You're welcome to do some tests. But try without ANY installed applications or with SAME apps installed, keeping screen on time same. And you'll see it makes no difference at all or minimal difference at best.