Database Users

[TUT/GUIDE] How to get better battery life

Hey everyone,
I just wanted to help out those people out there who are getting terrible battery life with their G2's. I made this thread because all of the other threads that have a screenshot of someone getting about 14 hours of battery life have just the screenshot and no explanation of how they got this great battery life.
This is after quite a bit of usage (probably about 3 hours of internet browsing and about 1/2 hour of angry birds
Obviously this will only apply to you if you are rooted.
Step 1: Download and flash this kernel.
Step 2: Set SetCPU to this:
NOTE: If you go any farther than 960mhz then the cpu voltage will be raised, causing lower battery life. Everything below and including 960Mhz is the exact same voltage with this kernel so you won't get any improvement by lowing the cpu freq.
Step 3: Disable profiles. ALL profiles.
^_^
Other Tips and Tricks
DON'T USE TASK KILLERS. THEY DON'T WORK.

Hello? Did this help anyone?
Sent from my T-Mobile G2 running Cyanogenmod.

Thanks for this link! I'm trying this out as we speak. I was previously running the GODspeed 1.4 Overclock with ok battery life..so i'm curious to see how this works. I'll definately keep you updated!

I always have a "screen off" profile with the frequencies set to 245/500, and I get insane battery life. Went over 14 hours yesterday, and I still have 55% remaining when I plugged in. That was also on the stock CM kernel. I'm trying out the UV kernel right now.

ibemad1 said:
Hello? Did this help anyone?
Sent from my T-Mobile G2 running Cyanogenmod.
Click to expand...
Click to collapse
It's only been a few hours that this has been posted (and at least in the States, a Sat. morning). Just give it some time. Also, I think quite a few people are running this kind of set up already (based on the numerous discussions seen in the various rom and and kernel threads anyway), so they probably aren't inclined to reply/vote. Even if they weren't doing this, you probably can't expect any results from people for at least a day or two (unless their battery usage was really bad to begin with, they aren't going to know how much this helps until after the change has been in place for a while).
Just a heads up, Pershoot updated his kernel so that the voltages from 768-960 are now the same as at 979, so you might want to update the guide. Also, just wondering why you recommend the performance governor over on demand if you are looking to improve battery life? Won't the performance governor stay at the higher clock speeds for longer periods of time than on demand? Or did you think this was an acceptable tradeoff (as in things don't run as smoothly for you on on demand and you felt the extra power usage was negligible). Just curious. I had always run on demand or conservative for battery life, but conservative is no longer supported in the Pershoot kernel (and some times led to slight lag in my display turning on).
Also, I'm not positive on this since I don't use Sense roms, but I heard that because Pershoot's kernel was designed to run specifically on AOSP-based roms, it may cause problems with Sense ones. Might want to either put a warning in your guide or verify that this isn't the case.

Ok, I'm following this guide, just flashed the kernel, it took more to backup than to actually install the kernel, on CM6.1.1, will check in tomorrow if I see any improvement, because I used to get only about 6hrs of battery life as I was before.
I always have wifi all day at home since my carrier (Movistar Venezuela) does not have 1900/2100 frequencies.

Thanks for the information. Although it is common.

ianmcquinn said:
It's only been a few hours that this has been posted (and at least in the States, a Sat. morning). Just give it some time. Also, I think quite a few people are running this kind of set up already (based on the numerous discussions seen in the various rom and and kernel threads anyway), so they probably aren't inclined to reply/vote. Even if they weren't doing this, you probably can't expect any results from people for at least a day or two (unless their battery usage was really bad to begin with, they aren't going to know how much this helps until after the change has been in place for a while).
Just a heads up, Pershoot updated his kernel so that the voltages from 768-960 are now the same as at 979, so you might want to update the guide. Also, just wondering why you recommend the performance governor over on demand if you are looking to improve battery life? Won't the performance governor stay at the higher clock speeds for longer periods of time than on demand? Or did you think this was an acceptable tradeoff (as in things don't run as smoothly for you on on demand and you felt the extra power usage was negligible). Just curious. I had always run on demand or conservative for battery life, but conservative is no longer supported in the Pershoot kernel (and some times led to slight lag in my display turning on).
Also, I'm not positive on this since I don't use Sense roms, but I heard that because Pershoot's kernel was designed to run specifically on AOSP-based roms, it may cause problems with Sense ones. Might want to either put a warning in your guide or verify that this isn't the case.
Click to expand...
Click to collapse
Don't ask me why, but ondemand drains my battery like crazy compared to performance.
Sent from my T-Mobile G2 running Cyanogenmod.

ibemad1 said:
Don't ask me why, but ondemand drains my battery like crazy compared to performance.
Sent from my T-Mobile G2 running Cyanogenmod.
Click to expand...
Click to collapse
I call BS on this. Performance is max frequency constantly while on demand is whatever is needed.

ahhh...another excellent finding after task kill. btw, task killer helps save the battery power a lot ,too....

TheBiles said:
I call BS on this. Performance is max frequency constantly while on demand is whatever is needed.
Click to expand...
Click to collapse
I'm just reporting what I found. Perhaps the ondemand governer is using more power because its constantly checking the cpu utilization?
Sent from my T-Mobile G2 running Cyanogenmod.

Here's some:
Use the stock charger. I believe the stock charger provides power at 5.5V (I'd have to check to know for sure), because that is the voltage the battery was designed for. A lower voltage could mean that your phone *thinks* it's charging at 5.5V and will stop charging when it *thinks* it's at 100%, while in reality it might only be at 80% or less. Higher voltages could wear out the battery faster but provide faster charging times.
Calibrate your battery. Roughly once a month, let your battery completely runs out (after it shuts down again, turn it on again until it's fully out), let it charge while off, and repeat at least once again. This may have a significant effect depending on how you use your phone
Turn off unneeded services while not in use. Having WiFi, Bluetooth, 3G, autosync, facebook sync, widgets, etc can harm battery. It is super simple to put toggles in your notification bar with either CM, MIUI, or Enom's roms that it is pretty much a painless way to dramatically improve your battery life. Facebook sync can be a huge waste too if you have it updating automatically, try instead refreshing it manually. Get rid of widgets that "seem" useful, but in reality just take up ram, download useless data, and take up space. I mean, I like to be able to know the temperature or whether I should bring a jacket, but do I really need the news to be right there in my face 24/7? Widgets like that would have to be constantly downloading data to be even be relevant, and IMO it is easier to just open an app. You can leave GPS on though, as the phone only activates it when necessary.
Update your radio to the latest available. This one is just common sense. The radio is basically the driver which your phone uses to connect to the cell tower, so wouldn't it make sense to have the newest, most efficient radio? I use the .02.17 radio and it is definitely better than the radio that came with the phone originally. Use Gfree before you switch because getting s-off with .02.17 is a pain in the butt.
Those are just some of the things I've realized with both my G2 and my G1 before it.

phonepart8 said:
ahhh...another excellent finding after task kill. btw, task killer helps save the battery power a lot ,too....
Click to expand...
Click to collapse
No, task killers don't work at all on Android. Especially so after 2.2.

mejorguille said:
Use the stock charger. I believe the stock charger provides power at 5.5V (I'd have to check to know for sure), because that is the voltage the battery was designed for. A lower voltage could mean that your phone *thinks* it's charging at 5.5V and will stop charging when it *thinks* it's at 100%, while in reality it might only be at 80% or less. Higher voltages could wear out the battery faster but provide faster charging times.
Click to expand...
Click to collapse
I'll get out my multimeter later to test this.
However, I don't think that's true. It probably just figures out whether it's on a usb port or ac charger by seeing if there's power on the DATA lines inside the usb cable. iPod Touches and iPhones REQUIRE this power so they recognize it as a usb port, otherwise they WILL NOT charge. This explains why, if I plug in my G2 into a charger designed for an iPhone (same specs, 5V out at 1.0A) it will register as USB to the phone and will charge quite slowly.
Again, this is all going off assumptions. I'll put my thoughts up against my multimeter readings later. ^_^

TheBiles said:
No, task killers don't work at all on Android. Especially so after 2.2.
Click to expand...
Click to collapse
Added to main post.

So yesterday morning I woke up at 9 am and went to ihop, I disconnected my phone from the charger at around 920 at 100% by the time it was 1040 ish I randomly looked at my phone and noticed my battery was at 33%?!?!?!? And I went crazy:O yet when I got home I charged it to around 83% disconnected at 730..then at 12 am when I got home I was barely at 61%?!?! Whatsoever the reason for this?!?!?!
Sent from my HTC Vision using XDA App
Sent from my HTC Vision using XDA App

kingvaj23 said:
So yesterday morning I woke up at 9 am and went to ihop, I disconnected my phone from the charger at around 920 at 100% by the time it was 1040 ish I randomly looked at my phone and noticed my battery was at 33%?!?!?!? And I went crazy:O yet when I got home I charged it to around 83% disconnected at 730..then at 12 am when I got home I was barely at 61%?!?! Whatsoever the reason for this?!?!?!
Sent from my HTC Vision using XDA App
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
I had this very problem with my G2... it fixed itself like yours did. I think it was probably either skype or qik, as the problem went away after I uninstalled them. You might have had a hung up application running in the background.
Sent from my T-Mobile G2 running Cyanogenmod.

I suppose I'm one of those people who had no issues with their battery, but I recommend using a screen off profile for SetCPU. In doing so, I can effectively go almost a full two days on a single charge, but this is with minimal usage. Such as texting and browsing the web for only a few minutes.
Sent from my HTC Vision using XDA App

I just got about 9 hours of battery life with heavy use using this guide:
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I still find myself getting better battery with the use of a screen off profile

Battery Life Thread!

Hey guys. Battery life honestly, is the most important thing when owning a smartphone. Everyone gets different battery life apparently. Some are great!! Some are.. well..
Anyways, my whole point of making this thread is so that we can discuss our various battery lifes. See who has the best. Who has the worst. And why we have such differences! Maybe we can make solutions and we can all have great battery life.
Please include what ROM your running, what kernel, if your overclocked, and little things you might find suitable to add.
For example this is for me:
I'm running Acer liquid ROM 1.1 with pershoots latest .32 kernel. I can get maybe 8 hours out of my battery with extreme mild use. I'm currently trying to recalibrate my battery with the help of bongz ( thank you so much!) I have my screen usually dim, nothing syncing from what I know of, bluetooth never on, gps never on, wifi only at home.
Sent from my Rooted God-like HTC Vision running Liquid Metal.

I'm running GingerVillan 1.5.
Battery life on standby is great - probably around 1-2% an hour. However, when I start using the phone, that drains QUICK. Generally I get around 12-14 hours out of a full charge with mild usage, including Phone Calls, Texts, 1-2 rounds of Words with friends, etc. WiFi is always off, bluetooth is off, GPS on. Stock kernel, newest radio near as I remember. Facebook and Google are the only two accounts.
I previously had a Vibrant that seemingly got better life - with mild use I could easily get 18-20 hours. However, having a keyboard and working GPS is worth the charge every night. The G2 could have gotten a couple hundred more mAh battery, if you ask me.

im running cm7 nightlies
my battery life is pretty good when not on. maybe 1% every 2-3 hours when off and in my pocket(set to absolute minimum via setcpu). with mild to extreme use i get ok battery life of about 4 hrs (starting at 80% usualy). im overcloacked to 1.8ghz ut have it set via setcpu to max out at 1.1ghz. i have gps always off, wifi always off, brighness to auto, and bluetooth off.

themeltingclock said:
I'm running GingerVillan 1.5.
Battery life on standby is great - probably around 1-2% an hour. However, when I start using the phone, that drains QUICK. Generally I get around 12-14 hours out of a full charge with mild usage, including Phone Calls, Texts, 1-2 rounds of Words with friends, etc. WiFi is always off, bluetooth is off, GPS on. Stock kernel, newest radio near as I remember. Facebook and Google are the only two accounts.
I previously had a Vibrant that seemingly got better life - with mild use I could easily get 18-20 hours. However, having a keyboard and working GPS is worth the charge every night. The G2 could have gotten a couple hundred more mAh battery, if you ask me.
Click to expand...
Click to collapse
Hm, I might consider upgrading radios. A lot of people are getting great battery life because of it.. will se.
I have never got more than 8 hours with my vision ever. Maybe because I have the old radio?
Sent from my Rooted God-like HTC Vision running Liquid Metal.

Hey,
I think there are too many variables at play here for this to be any use, but here is what I am running.
ROM: Virtuous 1.0.1, OCed to 1GHz using Virtuous Standard 2.1.2 Kernel
Radio: 12.18b.60.140eP_26.03.02.26_M
Build: 1.85
Brightness: Auto
Sync: Google, Facebook, Weather
Wifi: On at home, school; Off all other times
BT: OFF
Data: Always ON
Usage per day: 50-100 texts, 3-5 voice calls, 1-3hours of data/games
Current battery level including standby time and usage time is 57% after 6h 50m.
Good luck on the analysis!

stumpyz9 said:
im running cm7 nightlies
my battery life is pretty good when not on. maybe 1% every 2-3 hours when off and in my pocket(set to absolute minimum via setcpu). with mild to extreme use i get ok battery life of about 4 hrs (starting at 80% usualy). im overcloacked to 1.8ghz ut have it set via setcpu to max out at 1.1ghz. i have gps always off, wifi always off, brighness to auto, and bluetooth off.
Click to expand...
Click to collapse
Your oc'd that high lol? WHY?
Sent from my Rooted God-like HTC Vision running Liquid Metal.

Sorry, but battery life threads/posts are always such a joke. So many things effect the battery life that it really isn't as easy as just posting your ROM and Kernel and call it a day. Every single setting in your settings menu, every app you run or have installed, screen on/awake time, BT/GPS/wifi/3g/4g connections, and even just general areas that you use your phone pertaining to their signal strength can effect what your battery life is. Unfortunately, there really is no way to figure out what the "best" battery lives are. It really takes your personal preferences and some of your own tinkering in order to get your configuration just right. You can go into any given custom ROM thread and find someone claiming 30hrs of battery life.
Sorry to be a downer. I (personally) just get really tired of people posting battery life screen shots because there are an extreme number of variables that affect it. I think it gives people false hope of looking to switch to a completely new ROM or change huge numbers of things and expecting to double their battery life.

martonikaj said:
Sorry, but battery life threads/posts are always such a joke. So many things effect the battery life that it really isn't as easy as just posting your ROM and Kernel and call it a day. Every single setting in your settings menu, every app you run or have installed, screen on/awake time, BT/GPS/wifi/3g/4g connections, and even just general areas that you use your phone pertaining to their signal strength can effect what your battery life is. Unfortunately, there really is no way to figure out what the "best" battery lives are. It really takes your personal preferences and some of your own tinkering in order to get your configuration just right. You can go into any given custom ROM thread and find someone claiming 30hrs of battery life.
Sorry to be a downer. I (personally) just get really tired of people posting battery life screen shots because there are an extreme number of variables that affect it. I think it gives people false hope of looking to switch to a completely new ROM or change huge numbers of things and expecting to double their battery life.
Click to expand...
Click to collapse
Well said and true that.

CM7 nightlies, new radio (forget which one), after 19 hours still at 74%. Mild usage, few texts, twitter, email, updating apps, etc. And I always use wifi whenever possible, and then edge only when I'm out or not in a wifi area.

cm7 latest nightly #14 , latest radio , pershoot's kernel i can go 4,5 hours screen time on , no problem with constant edge connection on..extremely happy..
oh.. oc @ 1ghz no profiles

quierotacobell said:
CM7 nightlies, new radio (forget which one), after 19 hours still at 74%. Mild usage, few texts, twitter, email, updating apps, etc. And I always use wifi whenever possible, and then edge only when I'm out or not in a wifi area.
Click to expand...
Click to collapse
Can you go to about phone and check your radio?
Fellas hear this, with 2G constantly on only, the radio is using 47 percent of the battery. Do you guys find this normal at ALL? I'm running CM7 now with latest pershoot kernel and this damned .27 Radio which I am seriously considering removing for good.
Sent from my HTC Vision using XDA Premium App

Shaquiel Harris said:
Can you go to about phone and check your radio?
Fellas hear this, with 2G constantly on only, the radio is using 47 percent of the battery. Do you guys find this normal at ALL? I'm running CM7 now with latest pershoot kernel and this damned .27 Radio which I am seriously considering removing for good.
Sent from my HTC Vision using XDA Premium App
Click to expand...
Click to collapse
12.28h.60.140fU_26.06.02.27_M
It's that Hutch one from Australia or something. This one here: http://forum.xda-developers.com/showthread.php?t=959488

I just noticed that the battery life of my DesireZ is greatly dependant on where I am.... I have vacation now and I was mostly at home for the past three days the battery was still about 40% charged this morning so after 2 full days with moderate use, reading an Ebook, playing a game, wifi constantly on, exchange mail on Push and Gmail on push, with standard rom.
when I am at school the battery is often almost empty at about 5 pm...
maybe because of the bad coverage at school?

I don't know if anyone else really noticed, I seen it mentioned in another thread but not enough, if you don't use the wifi calling app, DELETE IT! I have noticed much better performance and battery life after getting of that ****
Sent from my HTC Vision using XDA Premium App

Can some one tell me their usage with 4g on all day and moderate use?
Ive begun to get lazy turning 4g off so lately im getting 10-14 hours usage before the battery is dead not using wifi at all ( work days no wifi at work). moderate use maybe 20 mins calling 20-30 text up to 45 min facebooking. nothing too much,
On nightly #29 no pershoot since i am lazy to update to newest nightly and newest pershoot only works after #30 and overclocked to 1.2ghz

I still don't get why people care about battery so much with g2. I got 2 extra battery and an external wall charger all for 10 bucks on ebay. why not use android to its full potential without ever worrying about battery for $10?

westchester1940 said:
I still don't get why people care about battery so much with g2. I got 2 extra battery and an external wall charger all for 10 bucks on ebay. why not use android to its full potential without ever worrying about battery for $10?
Click to expand...
Click to collapse
It's a hassle to take off the case (in my case an Otterbox) every time to swap the battery out. Added with the looser hinge, you might accidentally snap something that you don't want to. Would rather have one big battery than multiple smaller ones.

Understood. I don't ever use protection covers. Didnt even know tHere are the kind of cases not interfering with keyboard pullout...
Sent from my HTC Desire Z using XDA Premium App

I want the Mugen battery, my G2 has been quite crap battery life for the past while, I wonder how much this one will help

No complaints here.
Just thought I would throw down my stats as well:
I can usually eke out a good two or three days from my G2. Some things of note: I'm on Wi-Fi with UMA at home, T-Mobile's home network (EDGE) when I'm in the town in which I live, but as soon as I leave town and head towards my place of work, I roam on EDGE all night (with roaming data always turned on) until I get back home. I don't think I've even seen the 3G or H indicators light up on this thing. Got to love the rural life. I leave Wi-Fi always on, in case I find new networks, I leave GPS always enabled, since it really only activates on Google's home page anyways, I use the 30% brightness setting that is the default 'low' setting via the HTC brightness widget, and Auto-Sync is always enabled (Facebook, HTC (weather once per hour), Google). I use the default 1 minute screen timeout, and I use the lockscreen that comes with Poweramp (which I use to listen to music on my drive to and from work via an FM transmitter.)
The capture below shows 2d 14h 2m 30s since being unplugged, at 7% remaining. I use Virtuous 1.0.1 with the stock HTC kernel and the stock T-MoUS radio. I am also using the stock HTC battery that the phone shipped with. I don't feel the need to overclock, as my last phone was a BB Pearl, so this thing is light years faster already.
The only time I really eat up my battery is when I play Wordsmith, because I'm always staring at the lit screen trying to make fancy words.
And while you're right, there are way too many variables when it comes to battery life and usage and signal strength and what have you, it amazes me just the same that others are fine with 8 hours of battery life and choose to carry around extra batteries. Sure, you have a mobile Linux box in your pocket (awesome!), but that's also why I keep a desktop PC at home. To each their own, though, no harm no foul.
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consistent problem with high "DISPLAY" % on sense roms

hi guys i've been having a problem that i cant get fixed. ive asked some people and they are not sure what the problem, and also looked in threads and the fixes dont seem to work either.
i flashed the chadogr rom a while ago from cyanogen mod 7 becuz there were certain issues i was having with it.
when i had the chadogr sense rom, the battery would continuously die in barely no time at all, and when i looked at what was consuming my battery, "display" was always using at least 80-90%, and the phone would be dead in about 3 hrs or so.
got sick of it, and went to an aosp based rom called gingerbread evo deck 1.2w. it was very good and light on resources and battery life was good WHEN I DIDNT USE THE PHONE. but as soon as i started using it battery would drop so fast, but that didnt bother me, cuz sometimes i didnt need to use it. but there were somethings that i just couldnt stand with asop.
1. GPS never worked, EVER!! (i tried all the fixes to no avail) it was always searching for satellite everytime i wanted to use navigation.
2. it had awful signal strength (even wifi), constant disconnects, and always giving me this info that im internationally roaming (wtf)
3. a couple of other things not really worth mentioning.
i said eff it and decided to go back to sense, and decided on the synergy rom after reading the thread to great reviews.
i like the rom but im back again with those "high display" use problems again.
what is causing this and how do i fix it. there was a "fix" in the synergy rom thread but it didnt work for me. it said to go to the spare parts app and uncheck the compatibility mode, i did that and im still having those display issues.
here are some pics for illustration purposes:
this is the chadogr rom (sense), and after only about an hr, its down to 65% and look at what the biggest user is
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here is the aosp rom (gingerbread evo deck) and look how much display is using, so little
and now here is the sense rom i flashed yesterday (7/17/11) (synergy), BACK TO THOSE DISPLAY ISSUES AGAIN
sorry this is so long, pls dont bite my head off or yell at me , i dont know what else to do,
i dont have automatic brightness, screen timeout is set at 30s
im lost
pls help, and thanks alot guys

It's more probably a difference of the battery stats plotting rather than the drainage of the display. Display drains the battery most out of all the components in the phone, so that reading must be pretty accurate. If you're battery is draining ridiculously more over AOSP, which Sense ROMs usually do, than you might have a problem with the ROM or kernel themselves and not necessarily Sense, or it could be a more accurate reading for the Displays battery use. I am running Synergy Nightly 7/16 and my battery life is relatively good to CM7.1 RC1. And yes display is at the top at 66% at about 1/4 the time on(Ex. 2 hrs run time since charge, 30 mins display on). Turn of auto brightness too.

Also remember that it is displaying percentage, so the display being higher is actually a good thing. Your display uses the most power of everything on the phone, or it should be, when it is using a higher percentage of the total power available, it means that everything else is using less. The only way to get the percentage of display use down is to either turn the brightness down, or leave the display off as much as possible.

Click on display and you'll get an accurate reading of how much you actually used the display.
Synergy is awesome though, I went from 86% down to 85% when I woke up this morning. 10 hours off the charger and I wasn't even fully charged when I took it off. This thing is amazing with battery.

I have the exact same issue as the OP. I'm posting from my phone right now so when I get home I'll post a more detailed reply with pics but this is NOT NORMAL display usage. I'm getting sick of people telling me and others with this issue that its "just a percentage of what's using the battery and its normal ". Its not normal because this never used to happen to me and the display never used that much battery before. My battery life is horrible compared to a rom that doesn't do it. At most I'll get ten hours from a full charge and I can visibly watch the percentage drop as I'm using the phone. Even when I haven't touched the phone and the screen being off, the display usage will still be at like 90%.
It didn't use to happen, it seemed to just appear out of no where, the first time being with mikfroyo 4.62. I tried downgrading but no luck. I can only comment on roms that I have tried but it also happens with mikg and synergy and a few other sense roms. Aosp does NOT have this issue as I've tried a few differently ones. Currently using CM 7.1 and I'm getting at least 20 hours with heavy use.
I have been trying to get to the bottom of this for a few weeks but it seems that I just keep getting run around in circles. Now that I've seen other people are having this issue too hopefully we can get this worked out with some help. Its keeping me from using my favorite rom, synergy. I like aosp but it just can't match the performance and functionality of sense, oh and looks hehe. Like I said I will post up some pics when I get home to provide more evidence
Sent from my PC36100 using XDA App

Have you checked your wake time on the ROM? Wake lock issues are a more likely culprit than the screen when it comes to bad battery life like you described. Go to menu/settings/about/battery and look at your Up Time and your Awake Time. If they seem close to identical (even though you know you've walked away from your phone for a while and had the screen off, etc.) then you have a problem.
The most likely solution is a PRI downgrade to 1.77. Check your ROM's forum to see whether or not a particular PRI is suggested or not.

rlh82 said:
Have you checked your wake time on the ROM? Wake lock issues are a more likely culprit than the screen when it comes to bad battery life like you described. Go to menu/settings/about/battery and look at your Up Time and your Awake Time. If they seem close to identical (even though you know you've walked away from your phone for a while and had the screen off, etc.) then you have a problem.
The most likely solution is a PRI downgrade to 1.77. Check your ROM's forum to see whether or not a particular PRI is suggested or not.
Click to expand...
Click to collapse
Its not a simple wake lock issue. My up and awake time are very different, just like they should be. Its not pri either cause I've changed it multiple times with the same issue. How would that even affect display usage? Every pri problem had caused high cell standby or android system but not display. I just bought system panel and I am going to let it run a monitor for a while and see if it brings up any red flags (using synergy). This is something a little deeper than a simple wake lock or radio issue.
Sent from my PC36100 using XDA App

Yep, sounds like it. All I know is that many, many phones (including mine) on gingerbread roms show very high display percentages. However, the phone lasts just as long as normal. The going notion is that gingerbread handles app and service power so much better than Froyo did that the display percentage simply has to be higher. That's how percentages work, of course. However, if your phone is dying at a much faster rate than normal, then yes, something is wrong, but I wouldn't be surprised if it has nothing to do with your display. Not that I have any clue what it might be, just sayin'.

It does it regardless if its a froyo or gingerbread rom. First rom it popped up in was mikfroyo which is 2.2. But weirdly it didn't use to do it on that rom. I achieved my best battery life (30 hours moderate usage) on mikfroyo 4.62.
Sent from my PC36100 using XDA App

I have three different phones.
Hero (rooted with CM7) - high display usage
Epic (Unrooted stock 2.2) - high display usage
Evo (rooted various 2.3 rom) - high display usage
All have high display except when I run Deck 1.2.1.
On my Evo some rom such as Sprint lovers (stock after auto root v2.5) 3.70 gave me high Android system, but most if not all gingerbread rom with the exception of deck all show high display usage including miui.
This lead me to think that high display usage is quite normal IMHO, just thought I'd share.

theoner1 said:
I have three different phones.
Hero (rooted with CM7) - high display usage
Epic (Unrooted stock 2.2) - high display usage
Evo (rooted various 2.3 rom) - high display usage
All have high display except when I run Deck 1.2.1.
On my Evo some rom such as Sprint lovers (stock after auto root v2.5) 3.70 gave me high Android system, but most if not all gingerbread rom with the exception of deck all show high display usage including miui.
This lead me to think that high display usage is quite normal IMHO, just thought I'd share.
Click to expand...
Click to collapse
How high though? Mine and the OP display usage stays from like 80-90%. I can understand if its a little higher than everything else but this is extremely high. And why would extremely huh display usage be normal even if i haven't touched the phone and the screen is off? Its not normal because it didn't used to happen on the SAME rom. Like i said i used to be able to get 30 hours with mikfroyo 4.62, then this display issue came up and i cant hardly get 10 hours from a charge.
Sent from my PC36100 using XDA App

Plancy said:
It's more probably a difference of the battery stats plotting rather than the drainage of the display. Display drains the battery most out of all the components in the phone, so that reading must be pretty accurate. If you're battery is draining ridiculously more over AOSP, which Sense ROMs usually do, than you might have a problem with the ROM or kernel themselves and not necessarily Sense, or it could be a more accurate reading for the Displays battery use. I am running Synergy Nightly 7/16 and my battery life is relatively good to CM7.1 RC1. And yes display is at the top at 66% at about 1/4 the time on(Ex. 2 hrs run time since charge, 30 mins display on). Turn of auto brightness too.
Click to expand...
Click to collapse
when i 1st got my evo, display was never the biggest power consumer, it was either android system, phone idle or something else.
its hard to believe the reading is accurate, when i know i havent even woken up the phone that much, currently the biggest user of my phone at home is wifi, yet that shows only like 4% or so.
oh and yes auto brightness is off too as stated on the bottom of my original post

InfectedMushroom said:
Click on display and you'll get an accurate reading of how much you actually used the display.
Synergy is awesome though, I went from 86% down to 85% when I woke up this morning. 10 hours off the charger and I wasn't even fully charged when I took it off. This thing is amazing with battery.
Click to expand...
Click to collapse
ehh its ok, sure beats the other sense rom i was using (chardogr)
but still not blown away by the battery life.
i swear battery life is gonna be on the top of my list when im upgrading to my next phone, i cant deal with this **** anymore

ncfastls1 said:
I have the exact same issue as the OP. I'm posting from my phone right now so when I get home I'll post a more detailed reply with pics but this is NOT NORMAL display usage. I'm getting sick of people telling me and others with this issue that its "just a percentage of what's using the battery and its normal ". Its not normal because this never used to happen to me and the display never used that much battery before. My battery life is horrible compared to a rom that doesn't do it. At most I'll get ten hours from a full charge and I can visibly watch the percentage drop as I'm using the phone. Even when I haven't touched the phone and the screen being off, the display usage will still be at like 90%.
It didn't use to happen, it seemed to just appear out of no where, the first time being with mikfroyo 4.62. I tried downgrading but no luck. I can only comment on roms that I have tried but it also happens with mikg and synergy and a few other sense roms. Aosp does NOT have this issue as I've tried a few differently ones. Currently using CM 7.1 and I'm getting at least 20 hours with heavy use.
I have been trying to get to the bottom of this for a few weeks but it seems that I just keep getting run around in circles. Now that I've seen other people are having this issue too hopefully we can get this worked out with some help. Its keeping me from using my favorite rom, synergy. I like aosp but it just can't match the performance and functionality of sense, oh and looks hehe. Like I said I will post up some pics when I get home to provide more evidence
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
finally someone who understands what im going through, ive done everything and still coming up short with it.

I've had the same problem as the OP, specifically with Sac's Kingdom... Loving Sense 3.0, but the battery drain was a little much. Feeling your pain.

I'm going to PM myn and aamikam with a link to this topic. I don't think we will be able to figure this out unless we get some rom developers involved. Hopefully they actually take the time to read my message haha
Sent from my PC36100 using XDA App

ncfastls1 said:
I'm going to PM myn and aamikam with a link to this topic. I don't think we will be able to figure this out unless we get some rom developers involved. Hopefully they actually take the time to read my message haha
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
thanks for taking this up brother, 'preciate it.
props

I feel your pain bro. What got rid of my issue was i downloaded battery callibration app from the market. Charged to 100% and then used the app. My battery usage went from 5hrs to 16hrs yesterday. I'm loving it. Everyone give that try and trust me it works. Currently running synergy rc2.
Sent from my PC36100 using XDA App

One thing I noticed, in your pics your signal is very low, if your signal is low your phones gonna use alot of juice trying to maintain and/or look for a better signal.
Try checking in an area with a decent signal.

@OP...as long as your up time and awake times are diffrent Your phone is completly normal...1) when your using sense roms your continuously using your phone,so your display screen is on all the time. Hence the display so high. 2) when your using aosp roms..your taking long breaks from your phone..the flat lines on your graphs...your phone is sleeping,allowing more batt life..your in 20+ hrs of use..when your on sense your in 3-4 hrs of non stop use..it looks to me u enjoy sense more and can't put your phone down LOL..so the more u use your phone the higher your display % is going to be.
Sent from my PC36100 using XDA App

I Finally Did It! (24 Hour Battery)

I have been desperately trying for SEVERAL months to find a way to get my Samsung Epic to last ONE DAY. Many of you might say thats EASY but not for me. You see I am a POWER USER. Not one of those send a few text message, listen to some music, play a game or 2 users. I actually TALK on my phone a LOT.
I purchased a Yoobao 2800 MAH battery a couple months ago, thinking it would solve my problems and to my dismay I could ONLY get about 5-6 hours with the way I use my phone. So I began searching for apps and configurations that would help me achieve my 24 Hour goal and yesterday I finally found a configuration that works.....
My Results
Battery Life 25 Hours which included 4 HOURS OF ACTUAL TALK TIME W/ BLUETOOTH USAGE
Including 3 email accounts (2 Yahoo set to 1 hour check and 1 Corporate "PUSH" email)
A WHOLE GANG Of TEXT AND PICTURE MESSAGES...LOL
What I Have
Samsung Epic w/Yoobao 2800 MAH Battery
Running Stock Rooted EG22 (Leak) and Generation X "Green" theme.
What I used
Set CPU:
Set up profiles for maximum battery save when screen was OFF and when battery went below 30 percent
Juice defender (Free Version)
Tweaked for maximum efficiency using advanced settings
What I did
Themed everything as dark as possible (Go SMS Pro, Go Dialer, Go Contacts)
No Live wallpaper (Ovious...lol)
My Findings:
Contrary to popular belief....Tasks running in the background IS NOT the biggest source of battery drain. HAVING YOUR SCREEN ON IS! I was having NO success with any of the top task killers so I STOPPED USING THEM ALTOGETHER. All they seem to do is run constantly in the background (Even when the screen is off) killing apps that will RESTART themselves anyway after a few seconds. Juice defender works in a different way. By cutting off the data connection when the screen goes dark. That means any time Ii was on a call and the screen was dark, my data was cut off. (I dont usually need it when I am on the phone anyway) During this entire process I had a rather light wallpaper on my phone. so Im sure I could probably have saved a lil more battery if I wanted to.
Hopefully this will help some people get more battery life out of their epics. After all, whats the point in having a great phone if you can only use it (the way it was INTENDED) for a few hours.
Good Day To All!

lolz
im runnin ec05, srf1.2 rom, bright red & black theme(transmattered reds made by me) pulldown animation, stock battery, no memory mods, live wallpaper(my theme is mostly transparent so the live wallpaper is playing almost all the time), play pandora average of 4-5hrs a day, constantly checking fb xda email market(i have 120ish apps lol), & i get about 13hrs a charge...
you should try those changes on srf1.2 rom if you already havent... some people running similar setups have reported 2 full days or more...
but instead of set cpu you should try voltage control

BigBrotherMotown said:
That means any time Ii was on a call and the screen was dark, my data was cut off. (I dont usually need it when I am on the phone anyway)
Click to expand...
Click to collapse
Pretty sure when you get a phone call it shuts off 3G anyways. Atleast whenever My phone rings my 3G symbol vanishes completely.
Congrats on the 25hours though

I dont think thats true... I've been on a call using speakerphone and 4g data at the same time... I think 4g data still works if you are on a call
Sent from my SPH-D700 using XDA App

The key to good battery life is making sure your phone is sleeping properly when not in use. If CPU Spy shows 100Mhz much higher than deep sleep, then you got something that is keeping your phone from sleeping. I had a problem with some HP printer monitor on one of my computers pinging my phone constantly on my wifi network that would kill my battery if I let it sit with wifi on at home.

puff601 said:
I dont think thats true... I've been on a call using speakerphone and 4g data at the same time... I think 4g data still works if you are on a call
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
when on a call 3g is automatically turned off & 4g is still usable

CapsLockKey said:
The key to good battery life is making sure your phone is sleeping properly when not in use. If CPU Spy shows 100Mhz much higher than deep sleep, then you got something that is keeping your phone from sleeping. I had a problem with some HP printer monitor on one of my computers pinging my phone constantly on my wifi network that would kill my battery if I let it sit with wifi on at home.
Click to expand...
Click to collapse
The only way to do that with an ANDROID device is to power it off completely...LOL

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In the bottom right corner up there 1day 8 hours at 39%. I run srf, genocide, juwe ram tweaks, and set cpu with profiles to run the frequency lower as the day goes on.
Edit: I see now that that is a very ****ty picture. Man I just can't get screenshots right at all..
Cd's or tapes?

Talking on the phone and the 3g network use the same antenna, so you can only do one or the other. 4g and wifi use a different antenna so they will still work for data while on the phone.

Stringyquark said:
Talking on the phone and the 3g network use the same antenna, so you can only do one or the other. 4g and wifi use a different antenna so they will still work for data while on the phone.
Click to expand...
Click to collapse
Its not the antenna its the chipset. Bluetooth and wifi share the same antenna but both can be used at the same time.

After I flashed the EG22 Modem and Leak I had a 25 hr battery, but now I get about 10 hrs. Weird.

I have juice defender but I never use it.
Sent from my SPH-D700 using XDA Premium App

xizzmatt said:
After I flashed the EG22 Modem and Leak I had a 25 hr battery, but now I get about 10 hrs. Weird.
Click to expand...
Click to collapse
I saw roughly the same thing. Incredible battery life for the first day or two, then it would refuse to charge either of two batteries past 60%.

kynetx said:
I saw roughly the same thing. Incredible battery life for the first day or two, then it would refuse to charge either of two batteries past 60%.
Click to expand...
Click to collapse
The same thing happenned to me too. When I flash the 8 screen lockscreen with the hotspot fix my battery life decrease.
Xhyperion said:
I have juice defender but I never use it.
Sent from my SPH-D700 using XDA Premium App
Click to expand...
Click to collapse
Juice defender is good when you want your phone to control your data.

srf 1.2, i had up to 1 and a half days, with cm7 i run two days easy.
righy now im at 74% battery, 1 day and 2 hours.

Magic Oreo said:
srf 1.2, i had up to 1 and a half days, with cm7 i run two days easy.
righy now im at 74% battery, 1 day and 2 hours.
Click to expand...
Click to collapse
IS THAT WITH A STOCK BATTERY?!?
Thats unbelievable....

Until the newest RandomRom 2.3 Hawk I had the same problem trying to get my phone to last 24 hours. Now I have the RandomRom 2.3 Hawk installed with bloatware Removed, voodoo sound V9 module loaded, busy box pro and golauncher ex with over 100 apps also. 27 hours and I still have 14% battery life and that has been after using 4g for about 3 hours, flashlight for about 1 hour(teslaLED), played games for about 2 hours combined, sent about 40 emails, texted all day(about 150 texts), browsed the web for about 1 hour, watch some youtube videos for about 30 minutes and used navigation for about 30 minutes(coPilot). That is also with weather bug auto updating every hour and gmail sync'd to do its thing automatically. I am happier than I could ever describe now...I think I will finally leave my phone alone for a while now and stop flashing a million roms since I feel I have the best made for 2.3.4 now.

battery
I get about 18 to 20 hours of normal everyday use out of EG22 but i stay on wifi. on ec05 the most i could get is 6 hours, bottom line no matter what i tried. and thats with a stock battery.

About the battery consumption

Hello, I am a happy owner of the DHD.
It 'a great phone, but as you know, the only drawback is battery life.
I've tried several (few) ROM so far, and one with which I am slightly better is the RCMIX.
Now with this post does not go into details about what set, how to optimize (Sync off, energy saving displays, etc. ...) but I ask all your experience based on the ROM that you have installed:
1 - how to use the terminal?
2 - how long you last on a full charge and use it to do?
3 - What kind of ROM you use?
Thanks to all. I think it will be useful for someone like me, prefer a long battery life rather than three thousand graphicals functions

cubases said:
1 - how to use the terminal?
Click to expand...
Click to collapse
what !?!? which terminal do u mean ?
cubases said:
2 - how long you last on a full charge and use it to do?
Click to expand...
Click to collapse
With normal usage (some SMS, about 30 minutes surfing and emailing during the day, 30 minutes music listening and wifi turned on all day) my Phone lives mostly a full working day. When i come home from work (mostly 8 to 9 hours) i still have 20 % left...
cubases said:
3 - What kind of ROM you use?
Click to expand...
Click to collapse
I'm using RCmix3D Runny 1.3 with Revolution Theme . My phone is overclocked with setCPU to 1,45GHz and the Batterylife is optimized with a good profile set from setCPU (downclocking when display is off...and so on...)

m0rbus said:
what !?!? which terminal do u mean ?
Click to expand...
Click to collapse
Sorry... it mean: phone.... smartphone

m0rbus said:
Batterylife is optimized with a good profile set from setCPU
Click to expand...
Click to collapse
sorry but.. batterylife is an app?

Battery life... it's been quite heavily documented on the DHD fora, but here we go:
1500mah is not enough for a huge screen, especially if you want to use the phone's capabilities. The versatility of this phone means you'll want to be browsing, doing emails, playing processor heavy games etc. Each to his own
So, limit the stuff you sync (mail/facebook, news, weather), or at least reduce the frequency. These things cause "partial wake locks", which stop the phone falling into a deep sleep, after which battery consumption is minimal. Watch out for wifi settings too. Search for BetterBatteryStats (by chamonix) on the Android Apps section of the xda forum for much more detail, and tips.
You should be able to get to the end of the day with a good ROM (eg Leedroid/Revolution - they are very popular, but the threads are immense, which makes looking for information difficult). These ROMs have over/underclocking built in (governors), and you can also undervolt (theoretically reduces consumption too).
Limit transitions, be reasonable with screen brightness etc.
And if all else fails, and you use the phone intensively and can't get to the end of the day, you could invest in a power pack (search Amazon for the New Trent 5000mah power pack, which costs less than €30)

my DHD lasts around 4 hrs continuous screen on, much longer screen off. IMO, LM based roms have the best battery life.
But you could always get cheap $3 batteries for the Desire HD off ebay.

Battery life on my DHD was very bad before i rooted it. I am now running RCMix3D Runny V1.3 and my battery has lasted over 30 hours with alot of use.

cubases said:
sorry but.. batterylife is an app?
Click to expand...
Click to collapse
lol no....Battery life means how long the battery lasts... thats all. No app.

whistle81 said:
Battery life on my DHD was very bad before i rooted it. I am now running RCMix3D Runny V1.3 and my battery has lasted over 30 hours with alot of use.
Click to expand...
Click to collapse
indeed! I can not believe it!... with a lot of use....????!!!!!!!
Your kernel? Radio? Ril?

with m0rbus called "normal usage" my phone lasts around 48h. using my rom and lordmod 7.2 cfs and my personal governor/undervolt settings.
edit: though this result is not really specific to MY miui rom. one should be able to achieve these results with that kernel and settings on every aosp rom.
edit2: with "my normal usage" it last around 24-30h. this includes gameing, emailing, testing settings for developing my rom, rebooting etc.

I've used alot of roms most of the sense ones seem to use about the same battery life better than stock (they get me through work stock needed charged at lunch) but for a week now I've been using miui I've been home about an hour played about 15 min of angry birds, watched a few min on youtube and surfed on xda for a bit and I just over 40% i think that's pretty good going.
Sent from my HTC Desire HD using xda premium

Android Revolution HD 6.1
cubases said:
Hello, I am a happy owner of the DHD.
It 'a great phone, but as you know, the only drawback is battery life.
I've tried several (few) ROM so far, and one with which I am slightly better is the RCMIX.
Now with this post does not go into details about what set, how to optimize (Sync off, energy saving displays, etc. ...) but I ask all your experience based on the ROM that you have installed:
1 - how to use the terminal?
2 - how long you last on a full charge and use it to do?
3 - What kind of ROM you use?
Thanks to all. I think it will be useful for someone like me, prefer a long battery life rather than three thousand graphicals functions
Click to expand...
Click to collapse
Hi, I upgrade the ROM from the group Android Revolution, and my internet I put on 2G and work with WI-FI, GPS and SYNC ON. My battery life is working about 1,5 day.
Before I upgrade I use a Super-Wire patch from ARHD, I think this patch get this performace.
PS.: Sorry My English. I´m Brazilian.

I dunno guys.. I think all that is your subjective feeling and that ROM has no effect whatsoever on battery. Maybe small, but unnoticable. You never do things exactly the same or have battery charged exactly the same. In order to prove ROM has effect on battery usage you would have to make lab tests, i.e. make conditions the same. Moreover, if you look at the statistics of battery usage, it is clear that the most battery goes on SCREEN. And then GPS. Everything else is just a couple of %. All the talk of turning off wifi/3G to conserve power is simply not true. Just look at the statistics! Wifi takes like 2-3% of the power used, tops! The screen with it's 40%-70% is the problem, and there is no way to reduce that...

dalanik said:
The screen with it's 40%-70% is the problem, and there is no way to reduce that...
Click to expand...
Click to collapse
exactly....

You could always try to lower auto brightness levels by way of a flashable patch. I found that after doing this the screen was only using between 30-40% of the battery. Even so, it is the screen that always uses the majority of the battery. All the tips regarding decreasing battery by switching off syncing, wifi, widgets, etc are in my opinion a bit misleading. If you have a good radio and corresponding RIL then this will vastly reduce battery consumption whilst still being able to sync emails, widgets, etc with the wifi on. I recommend Radio_12.54.60.25_26.09.04.11_M2 and it's matching HTC-RIL 2.2.0160HM. I'm currently on Orange in the UK and this combo works best for me across several different ROMs.

michael_duvalle said:
You could always try to lower auto brightness levels by way of a flashable patch.
Click to expand...
Click to collapse
where could I found it?
If you have a good radio and corresponding RIL then this will vastly reduce battery consumption whilst still being able to sync emails, widgets, etc with the wifi on. I recommend Radio_12.54.60.25_26.09.04.11_M2 and it's matching HTC-RIL 2.2.0160HM. I'm currently on Orange in the UK and this combo works best for me across several different ROMs.
Click to expand...
Click to collapse
I have the same your radio/ril.

cubases said:
where could I found it?
http://forum.xda-developers.com/showthread.php?t=1034743
Also, dependant on what ROM you're using you might find it within the development section post relating to your ROM. I'm using Virtuous Unity 2.37 and within the post there's a flashable lower auto brightness patch.
Click to expand...
Click to collapse

dalanik said:
I dunno guys.. I think all that is your subjective feeling and that ROM has no effect whatsoever on battery. Maybe small, but unnoticable. You never do things exactly the same or have battery charged exactly the same. In order to prove ROM has effect on battery usage you would have to make lab tests, i.e. make conditions the same. Moreover, if you look at the statistics of battery usage, it is clear that the most battery goes on SCREEN. And then GPS. Everything else is just a couple of %. All the talk of turning off wifi/3G to conserve power is simply not true. Just look at the statistics! Wifi takes like 2-3% of the power used, tops! The screen with it's 40%-70% is the problem, and there is no way to reduce that...
Click to expand...
Click to collapse
Yes and no.
If you are using the device, you can limit transitions, underclock the processor (via a custom ROM), flash a patch to modify the brightness as mentioned below. That definitely will help reduce consumption while in use.
However, and this is not collected in the Battery Usage option in Settings, Partial Wakelocks are the main contributor to battery consumption. When the phone is inactive, it should be asleep as much as possible - applications like Phone, Mail, Latitude, alarms etc wake it up for either scheduled or ad-hoc events. If you install BetterBatteryStats you will see which processes are keeping your phone awake & hence in a higher state of battery consumption.
Oh, do NOT buy cheap ebay batteries. They lie about their capacity. The only battery which offers more capacity than the OEM one, is Mugen (search in the Accessories forum), it's 1500mah. That extra power could make the difference in making it to the end of the day, but it costs about $45 I think.

You think this behaviour is normal?
Keep in mind that my DHD are this morning on the deck, and only hotspot is active (with whom I connect from the notebook) and sync only 2 emails to connect every 15 minutes each
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http://imageshack.us/photo/my-images/101/screenshot7rt.png/
The display is set:
animations all, auto brightness, timeout 15 seconds
Probably do you think may be due to the fact that until now has always been on the deck in charge?

paul c said:
...Partial Wakelocks are the main contributor to battery consumption. When the phone is inactive, it should be asleep as much as possible - applications like Phone, Mail, Latitude, alarms etc wake it up for either scheduled or ad-hoc events.
Click to expand...
Click to collapse
If I charge the phone before going to sleep to 100% and leave it on, in the morning the battery it at like 60-70% which IMHO is really too much. I have sync set to between 1-2 hour intervals depending on service, but over night I set phone data to OFF so it shouldn't matter, should it? Then why such consumption? I understand it over the day when I use it, but at night the display is off, data is off so what could cause this? It can't be syncing since the data is off....