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Battery Performance Experiment: Two ROMs vs. Stock

So, I recently cancelled AT&T but I wanted to make a couple of last remarks on a battery issue, so as to (hopefully) better inform the devs. Up front, I will say that the reception at my house is terrible (hence my cancellation). As such, I expect somewhat poor battery performance. I have run nearly every version of Cognition, tried the AOSP project, and most recently run Perception. After using these, I was left with the impression that the battery performance in all of these has been disappointing.
Having received my new phone and with my old service not yet deactivated completely, I decided to try a more formal test. I used the following test protocols in order to ensure a fair and accurate comparison was conducted:
1) The phone was positioned for the worst possible reception in my house. It was only moved to change ROMs and was returned to the approximate location it was previously in.
2) Each ROM was flashed at 100% battery, with SIM and SD Cards removed.
3) A battery recalibration was performed after each flash, as detailed in the Cognition thread (Charge to full, turn off, charge to full, turn on, use for 2 minutes, charge to full, delete battery stats). Following this I did one more complete discharge and recharge to ensure the statistics would reconfigure with the calibrated battery.
4) GPS and Bluetooth were turned off; WiFi remained on and connected through all test runs.
I loaded Cognition version 2.3b6 and then Perception build 3, both of which performed approximately the same. Leaving my phone on standby and with only very light use (0 answered calls and no internet surfing or messaging), I could get no more than 15 hours of battery power before it died. Following this, I restored my phone to the stock JH7 update and, as of now, my phone is at 54% after 2d 19h 25m of use.
I know many people have been flamed for daring to suggest that the ROM has something to do with the battery draining abnormally, but I did this test as objectively as I could so that the community of developers can use the information to improve on this issue. In my opinion, this test suggests that something in the custom ROMs is causing an excessive battery drain. While this may not be happening on everyone's phones, it is most definitely happening on two of my Captivates. Hope this helps and good luck! I am off to Droid X Land! Suppose I'll use my working GPS to get there! (Sorry, couldn't resist... too soon?)
Edited for grammar and clarity

Poor signal is the biggest battery drain. Especially in 3g areas. I have had phones on VZW and ATT (different times and locations) where my battery would not last 8 hours.
Another test to show it is not the ROM or OS is to put the phone in airplane mode and observe almost 0% battery drain overnight.
But since these custom ROMs are built off beta releases, I am not surprised by your results.
Sent from my MB520 using XDA App

I noticed the same thing a while ago and am just hoping there is some issues with the fact that these roms are being developed on leaked builds without the source code.
The key thing to notice in the attached screen shot is the near constant 1-3% cpu activity when the phone is not being used. On JH7 I could leave my phone on over night and only lose ~3% battery. Currently on Perception build 4 I lose ~20-25% overnight. On Cognition 2.3b3 I lost about the same.

I get about 16 hours on my captivate with light to moderate use on the froyo leak.
on Perception and Cog (latest builds) I was getting about 9-10 hours with very light use.
I need another battery

skippyg said:
I get about 16 hours on my captivate with light to moderate use on the froyo leak.
on Perception and Cog (latest builds) I was getting about 9-10 hours with very light use.
I need another battery
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Click to collapse
I doubt the battery is your problem. As my test suggests, I am pretty confident that if you were to restore to stock, you would find your battery risen from the dead.

I can vouch for the OP about battery life. Battery life on JH7 is WAAAAYY better than any custom 2.2 ROM. I am running stock JH7 with Atimns v1.10 Voodoo kernel. Beats the pants off of the Cognition 2.3b6 ROM I was using battery-wise. In my experience, all of the Froyo based ROMs have battery issues. :-(

I just searched up a little bit more and found that the sensor is using a lot of juice because of a bug in the picture gallery app included in all froyo roms/leaks. I checked my sensor use and sure enough it was at 6 hours non stop. uninstalled using root explorer installed the Gallery3D.apk found on this site and now the use is at 2 seconds. I hope this was the cause. Also, is the android system supposed to be using so much of the sensor? My phone has been on for 11 minutes (reboot) and the battery history in *#*#4696#*#* says its been on for exactly the same amount of time...
sorry for the thread jack!

skippyg said:
I just searched up a little bit more and found that the sensor is using a lot of juice because of a bug in the picture gallery app included in all froyo roms/leaks. I checked my sensor use and sure enough it was at 6 hours non stop. uninstalled using root explorer installed the Gallery3D.apk found on this site and now the use is at 2 seconds. I hope this was the cause. Also, is the android system supposed to be using so much of the sensor? My phone has been on for 11 minutes (reboot) and the battery history in *#*#4696#*#* says its been on for exactly the same amount of time...
sorry for the thread jack!
Click to expand...
Click to collapse
The issue with the gallery using the sensor has been known for some time. If you our the rom dev did not change out the apk, you should.

Well I changed it and my battery has been going great! Heavy use with 5% decrease per hour since I replaced it.
Sent from my SAMSUNG-SGH-I897 using XDA App

To be fair...the custom ROMs I have tried each had WiFi set to always on. The stock ROMS from had is set to only be on when the screen was on. Depending on the availability of a WiFi AP, this can make a huge difference. Looking for a WiFi AP to connect to is costly.

jswclw said:
To be fair...the custom ROMs I have tried each had WiFi set to always on. The stock ROMS from had is set to only be on when the screen was on. Depending on the availability of a WiFi AP, this can make a huge difference. Looking for a WiFi AP to connect to is costly.
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In my case, this was not the difference for me. I always had my WiFi always on, even with the screen off. I turned it off manually if I know I am going to be some where WiFi is not available. The battery drain is definitely somewhere else....but these are leaked Froyo ROMs for a reason.

emuneee said:
In my case, this was not the difference for me. I always had my WiFi always on, even with the screen off. I turned it off manually if I know I am going to be some where WiFi is not available. The battery drain is definitely somewhere else....but these are leaked Froyo ROMs for a reason.
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Click to collapse
do you know how to switch a rom from always on to only being on when the screen is on? i'm running a custom rom and i'm not seeing this setting anywhere aside from completely toggling wifi

domin8 said:
do you know how to switch a rom from always on to only being on when the screen is on? i'm running a custom rom and i'm not seeing this setting anywhere aside from completely toggling wifi
Click to expand...
Click to collapse
Wifi settings> menu > advanced
Sent from my Captivate

curti.nogg said:
Wifi settings> menu > advanced
Sent from my Captivate
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whoa, cant believe i never saw that menu before. so setting it to 'when screen is off' will give better battery life?

domin8 said:
whoa, cant believe i never saw that menu before. so setting it to 'when screen is off' will give better battery life?
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It depends. If there is a lot of data transfers going on and WiFi is off with the screen, these transfers will take place over 3G, which in more cases is not as power efficient as WiFi, all else being equal.
I'd say, WiFi always on is better, in my experience anyway. Mileage may vary.

emuneee said:
It depends. If there is a lot of data transfers going on and WiFi is off with the screen, these transfers will take place over 3G, which in more cases is not as power efficient as WiFi, all else being equal.
I'd say, WiFi always on is better, in my experience anyway. Mileage may vary.
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Click to collapse
For me personally I get terrible battery life when wifi is on. Everyone on here seems to say that leaving wifi on saves battery but this has never been the case with any device I've ever owned . And I'm talking about when I'm sitting home in an area with good wifi reception too.

I can't figure my battery out at all. On the weekends if I stay home and keep wifi on my battery will be on for 20 hours and still have 65% left. Once I leave home and I'm using 3G I can only get about 5 hours. I've lost 20% or more per hour without even touching my phone.
Another weird thing is under battery usage and "cell standby", it always shows time without signal at 50%. Never more and never less, always 50% exactly. Any ideas?

tietherope said:
Another weird thing is under battery usage and "cell standby", it always shows time without signal at 50%. Never more and never less, always 50% exactly. Any ideas?
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Wish I had the answer for this too. Mine says the same exact thing. Always 50% yet I always have signal where I am. I'm hoping it's some sort of miscalculation and not a major bug where network connections are being dropped constantly and not being shown.

I get three+ days with my phone...
Sent using smoke signals.

Man, I thought I was in my own boat. Same exact symptoms across Cognition, Perception, Axura, you name it. Something weird though is that the first day is always great on battery, then after a night's charge it goes back to the 12 hr max per day (moderate usage). On stock it definitely lasts a lot longer. can't wait for an official froyo release... especially now that I have to use Good Messaging, another huge battery hog.

Battery is Great on the Tunderbolt

Put it to a real test. Went to the grand prix today in st. pete.
Didnt even have a full charge around 90%. Had 4g on all day.. Brightness all the way up. Facebook , twitter, and 2 e-mail accounts running in the background. Took tons of video clips and tons of pictures, and streamed music through the bluetooth on the way home. As I type this its been 10 hours since it came off the charger and its at 50% battery with all the same items running.
At 1st I had very very bad battery life. But after using it for a few days and then doing a battery pull (read it would get better after all this) it has been working great, with the same or more use then I was doing the 1st few days of ownership. Just wanted to share a postive experience on battery life since I keep hearing and reading so many negative things.
Edit: Thunderbolt not tunderbolt LOL

Thanks for the tip.
I'm noob w battery. Do you mean just charge it full, pull it out and put it back in and it lasts you that much? I'm skeptical....The most I could have so far is 12 hours and I have 3 bars (out of 10) left.

quattr0 said:
Thanks for the tip.
I'm noob w battery. Do you mean just charge it full, pull it out and put it back in and it lasts you that much? I'm skeptical....The most I could have so far is 12 hours and I have 3 bars (out of 10) left.
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The main reason people are having drain on 4g from what i heard was the software for the radio was re-written at the LAST minute (the reason for the delay) because they had to change their 700 MHz frequency just a bit higher.. something like 5 or 10 Mhz due to interference with with communication towers at airports. this sucker keeps dropping 4g like its no ones business. the new baseband which will be pushed out in the first update for the phone (hopefully in next month) should correct it.

Thats funny because i was at the gp today and my battery died before i left at 1p. Took a couple of pictures and 1 video. Used gps for like 10 mins and that was it. Stayed in my pocket for the rest of the day.
Sent from my ADR6400L using XDA App

hmm
I Disabled my 4G with dialing the *#*#(forgot the 4 numbers)*#*# and my battery has been lasting me alot longer

I'm in a 4G area so I have the phone set to LTE mode only and I get great battery life.

I probably have the worst battery life ever... 70% before putting it away and not using it. 5 hours later, I check my battery and I'm at 10%!! I didn't even use it!
Sent from my ADR6400L using XDA App

my battery was about to die on me today within 3 hours of being off the charger, granted it was with heavy use.. flashing multiple roms using titanium backup etc... but i still think that is asinine..

Powell730 said:
my battery was about to die on me today within 3 hours of being off the charger, granted it was with heavy use.. flashing multiple roms using titanium backup etc... but i still think that is asinine..
Click to expand...
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flashing roms will eat battery...once you are on a rom it takes a cycle or 2 to settle

anourack said:
I probably have the worst battery life ever... 70% before putting it away and not using it. 5 hours later, I check my battery and I'm at 10%!! I didn't even use it!
Sent from my ADR6400L using XDA App
Click to expand...
Click to collapse
U need to learn how to charge it. Search around.
Sent from my ADR6400L using XDA App

The battery life on the TB is just as good as it was on my rooted dinc with a custom kernal. I have no complaints with stock unrooted TB so far and I use the **** out of it.

I turned off 4g and am going 16 hours on 50% battery. Really, to sit in my pocket, do calls, text, and check email I don't need 4g. I too noticed the 4g radio switching on and off constantly. Hopefully the baseband update will fix this.

ZBoater said:
I turned off 4g and am going 16 hours on 50% battery. Really, to sit in my pocket, do calls, text, and check email I don't need 4g. I too noticed the 4g radio switching on and off constantly. Hopefully the baseband update will fix this.
Click to expand...
Click to collapse
It has more to do with where you live and how good your 4G coverage is
Sent from my ADR6400L using XDA Premium App

i get 12hrs easy with moderate use. All I've done is turn off the GPS services when not needed and disable the lock screen... hope things improve for everyone having issues... :/

quattr0 said:
U need to learn how to charge it. Search around.
Sent from my ADR6400L using XDA App
Click to expand...
Click to collapse
What do you mean, is there a special way to charge it now?

anourack said:
What do you mean, is there a special way to charge it now?
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Click to collapse
I think he may be referring to the "bump" charge. Where you charge the phone to full, unplug it, turn it off, charge it to full again, unplug, turn it on, and charge it to full again. Not sure if this is an HTC thing or just a general lithium ion battery thing. But it helps IMO.
I get about 12 hours of battery life with moderate use. I little web surfing, lots of texting, light app usage. My phone is constantly switching from 4G to 3G when I'm indoors. Outside though I'm fine. I'm surprised about the different experiences people are having with battery life.
Since I can't get through a whole day without it dying I bought a second home charger on amazon. I'd like to get the extended battery, but it looks like it'd make this phone too big at that point. I wish there was some better battery tech coming out soon, since there hasn't been too much progression on that front.

Turn on the wifi radio. When you are home or anywhere you have access to wifi, the device will automatically turn the 4g radio off when wifi is up. That simple change has made a huge difference and I dont have to worry about turning the 4g radio on/off manually.

I've been seeing, under heavy use, at minimum 8 hours of use consistently since I've been through a few cycles, including bump charging the first few cycles. Also, a few things that greatly helped me:
Read somewhere that the stock blockbuster app, even if it has never been opened, has a service that updates the movie catalog in the background. Run the app, update it, and in settings turn off movie catalog updates. After doing this my battery didn't drain nearly as fast while in my pocket. I can't verify that this actually helps, but it did for me. I disabled the 4G radio since I live in a 3G area as well.
I also run Green Power as of this morning. My phone has been running over 12 hour with 3:30 of that being actual usage and I'm at 68% remaining. I have it set to 1 minute on and 10 off for data while it is locked in my pocket.
Beyond that, GPS is disabled unless I need it. So is WiFi. Brightness is at about 30%, with a widget to bump it to full when I'm outside in sunlight. I also noticed a big jump when I disabled HTC sense Facebook updates, and used stock Facebook instead. Every time I went to contacts it would download that contacts Facebook updates, which is pointless and uses data constantly under normal usage.
Of course your mileage may vary, but this all gets me through the day under normal usage, and over a half day under heavy usage.

I am currently at 8.5 hours with 79% left on my battery. Stock Battery. If I didn't have to work tomorrow, and be able to make phone calls and such I'd leave my phone unplugged all night to see how long it can go.

nosympathy said:
I am currently at 8.5 hours with 79% left on my battery. Stock Battery. If I didn't have to work tomorrow, and be able to make phone calls and such I'd leave my phone unplugged all night to see how long it can go.
Click to expand...
Click to collapse
I'm assuming thats with Virus Rom as it says in your sig? If so, that makes me want to try it. I'm stock unrooted right now, haven't had time to invest in rooting the ADB original method yet, don't want to rush through it. When I do, I fully intend to try that rom out.

Battery draining AGAIN

So i tried what you guys suggested. I rooted the phone, bought setcpu, using anttek to freeze running services, and used the battery calibration app still NOTHING. I just woke up and my battery was at 0 before i went to sleep it was at 62%!! How can it die in idle with no running servislces wi fi off gps off BT off i mean it has to be the battery right?
Sent from my LG-P999 using XDA App

I was just getting on here to rant about this. It seems that whenever I use the phone the battery gets warm and declines quickly. Lost over 40 percent battery over 2 hrs mostly playing mp3s
Sent from my LG-P999 using XDA App

This may or may not be related...just something to think about. For years I've placed my phone in the top drawer of my nightstand when sleeping. What I noticed when switching to Android is if I leave syncing on it will drain my battery. My theory is...in the drawer my data signal is very week or non existent. The phone dutifully tries to sync on that weak signal...searching for signal...fails and retries...or succeeds and transfers at a snails pace. Result dead battery. I've found that disabling data before bed results in less than a five percent drop. Just my experience.
If not then I'd suggest a phone swap.
Also...Why in the world did you start another thread? If we scatter all these x is wrong with my phone posts across multiple threads it really hampers the effort to solve the problem.

greengoldmello said:
I was just getting on here to rant about this. It seems that whenever I use the phone the battery gets warm and declines quickly. Lost over 40 percent battery over 2 hrs mostly playing mp3s
Sent from my LG-P999 using XDA App
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Click to collapse
Did you look for a solution before deciding to "rant"? Just curious...

greengoldmello said:
I was just getting on here to rant about this. It seems that whenever I use the phone the battery gets warm and declines quickly. Lost over 40 percent battery over 2 hrs mostly playing mp3s
Sent from my LG-P999 using XDA App
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Click to collapse
I've also noticed this. In the morning my battery life is decent but by the after noon I can do light web browsing (10-20) mins in an hour and loose over 15% tmobile told me that isn't good lol I have a new battery on the way. They shipped it out yesterday we'll see if that helps. Also my battery was dead when I got my phone did anyone else get one that couldn't even power the phone on?

bdkinney said:
Did you look for a solution before deciding to "rant"? Just curious...
Click to expand...
Click to collapse
Yes. Like the OP, I tried the solution of the person that is so called getting 20hr battery life under medium usage. Just doesn't seem feasible at all. And its really annoying to have to cut the data off completely to keep the phone from getting warm...
Sent from my LG-P999 using XDA App

greengoldmello said:
Yes. Like the OP, I tried the solution of the person that is so called getting 20hr battery life under medium usage. Just doesn't seem feasible at all. And its really annoying to have to cut the data off completely to keep the phone from getting warm...
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
If you researched the problem and tried the solutions offered, then the logical next step is to contact T-mobile for a replacement. This is an early release of a new phone; there will be defects. And you don't have to settle for a defective device/battery. I can assure you, I get battery life on par with my previous phone (8-20 hours depending on my usage)..so, bad battery life isn't a problem inherent to the phone. And my phone doesn't get warm with data usage. It sounds like you might have a defective battery or phone. If you aren't satisfied, don't settle...make 'em make it right.

I get about 5-10% battery drain overnight most nights and I am not mindfull of what apps are running or what is on. My experience obviously differs from yours. I do get great service in my bedroom where the phone is overnight. The other night I did experience a bout a 60% drop when I left the phone in my daylight basement (underground). I get crappy 2G service in my basement and it looses signal a lot. I think it adds some credibility to the searching for service slowly killing the battery. maybe try putting the phone in airplane mode before going to sleep. That should give you some indicator.

I'm now are 28 percent after 3 1/2 hrs with the display only using 13% if that..
Sent from my LG-P999 using XDA App

greengoldmello said:
I'm now are 28 percent after 3 1/2 hrs with the display only using 13% if that..
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
Just curious, does your phone feel hot right now?

You might have a bad battery or something. My first g2x rebooted constantly and drained the battery and got hot.
New one goes 8am to midnight with 20% battery left, on moderate usage. And even at the 20% left i can leave it overnight and it'll still have power in the morning.

greengoldmello said:
I was just getting on here to rant about this. It seems that whenever I use the phone the battery gets warm and declines quickly. Lost over 40 percent battery over 2 hrs mostly playing mp3s
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
The phone is going to get warm is use because the CPU is under load and that produces heat. As long as its not overheating this is normal.
Have either of you tried the factory reset? That fixes the idle drain for most people.
Also... Your phone is going to drain battery faster while actually in use no matter what you do. The LCD and data connection are the biggest battery drain for smartphones. Until battery technology improves, there is nothing that can be done about this. But like I said try a factory reset and you should see your idle drain improve dramatically.
Sk8trfred said:
I've also noticed this. In the morning my battery life is decent but by the after noon I can do light web browsing (10-20) mins in an hour and loose over 15% tmobile told me that isn't good lol I have a new battery on the way.
Click to expand...
Click to collapse
Were you on wifi? Because if you weren't that much drain is within the norm. Web browsing = constant data connection = more power consumption = faster battery drain.

I had 10 hours of heavy use yesterday and had 25 percent left... 2.5 of those were in airplane mode cuz I was flying from Phoenix to Atlanta but I watched a movie during the flight and had music playing the rest of the time... during my layover which was 4 hours I browsed the web, watched a stream of the Celtics vs heat for a bit, more music... I plugged back in with 25% left and had 3h20m of screen on time... this battery is freaking awesome! I had drain issues initially but they went away and now I'm golden

when i did a factory reset, my phone was getting hot until i remember about the *#*# thing and changed that to wcdma/gsm auto. then my battery life got better.

Get juice defender. Its work wonders for me and my buddies thunderbolt actually makes it through the day now
Sent from my LG-P999 using XDA App

Battery Drain is mostly Cellular radio
I too am have been looking for a way to have this phone last at least 8-12 hours with normal usage, but I don't think its going to happen unless there's some major update to the radio firmware coming in 2.3 Gingerbread..
All the evidence seems to suggest two culprits... for battery drain.
- First is the 4G radio, look around at almost ALL 4G enabled phones (whether on GSM at&T Tmo or Verizon), all eat your battery, from the very beginning EVO 4g, Verizon Thunderbolt, Mytough 4G every single one of those phones has the users complaining about horrid battery life. You can confirm this by looking at the battery usage on the G2X and you'll see that the number one use is Cell Standby (that's the cellular radio) on my phone its anywhere between 35% to 60% of total power used.... on kmy nexus one it used to be the display.
-Second, Tegra 2 is more power hungry , granted its a mobile SoC but its mainly designed for Tablets and such with beefy batteries, this is the reason that the Atrix comes with a 1950MaH battery, you can try and use SetCPU to lower the speed, but I have had minimal success.
Here's a test , when you don't need your phone put it on Airplane mode, for 24hours and watch HOW LITTTLE the battery drains.. reason the cellular radio isn't on..

bdkinney said:
This may or may not be related...just something to think about. For years I've placed my phone in the top drawer of my nightstand when sleeping. What I noticed when switching to Android is if I leave syncing on it will drain my battery. My theory is...in the drawer my data signal is very week or non existent. The phone dutifully tries to sync on that weak signal...searching for signal...fails and retries...or succeeds and transfers at a snails pace. Result dead battery. I've found that disabling data before bed results in less than a five percent drop. Just my experience.
If not then I'd suggest a phone swap.
Also...Why in the world did you start another thread? If we scatter all these x is wrong with my phone posts across multiple threads it really hampers the effort to solve the problem.
Click to expand...
Click to collapse
I agree. These battery threads are driving me nuts.
Go in the other million threads and read

The thing that is strange to me is how quickly these phones charge. It seems to go from 0% to 100% in well under an hour. Was thinking I should try charging it while off (well, screen w/ battery only).

What???? Having the phone on makes my battery drain? WTFO?!?!?!
Seriously though, I have not experienced bad battery life on this phone. Last night I left my phone off the charger, gps, wifi and wifi calling on, and when I went to bed at 1030 I had 64% battery. At 700 this morning I had 54% battery. Only a 10% drain for me overnight, or a little more than 1% per hour.
All I've done to achieve this is the following (and I realize that supposedly you no longer have to condition Li-ion batteries):
-when I got the phone, I didn't charge it but instead let the battery die completely to where I couldn't even turn the phone on.
-charged the phone overnight w/o turning it on.
-let battery die completely again.
-charged phone overnight w/o turning it on.
-let battery die completely again.
-charge and use phone normally.
I've also rooted the phone and used Ti Backup to remove most all of the bloatware except wifi calling, but otherwise it's the stock rom.
I typically get an entire day of my normal use on this phone. If I use it alot, I have to top off the battery w/ my car charger on my way home from work. This isn't unusual. I had to do this w/ the blackberrys I owned and my evo when I was on Sprint. The battery life doesn't seem any better or worse for me than any other smartphone I have owned, and it's certainly better than my evo or my wife's evo, and both of those were rockin' custom roms and uV kernels.

jayohwhy said:
when i did a factory reset, my phone was getting hot until i remember about the *#*# thing and changed that to wcdma/gsm auto. then my battery life got better.
Click to expand...
Click to collapse
forgot about doing this lolz
...also you can also change it in the mobile network settings

Battery Life, Oh?

I think it's crazy how many people are downing the battery life on the Sensation. I used my phone a bit today. Off the charger at 10AM, used GPS to go to work with Bluetooth activated as well. Forgot to turn them both off while at work. I used my phone like ever 5 minutes checking Twitter updates(also weather/news/facebook/email/etc updates are automatically updating as fast as the app allows. So quick updates for all my apps, GPS and bluetooth turned on all day. Home around 5, watched a few episodes of South Park on Netflix with my phone. Read some news. Played a few different games for about 5-10min each just trying out new games. It's now almost 1AM the next day, and I'm above 40% battery life. I manage my screen brightness, that may be the only thing I remembered to manage well today. While outside/in car, full brightness, inside, as low as possible.
It's shocking to me when I see threads of how the battery life stinks. I'm using the stock battery, I don't even seen the need of getting a larger battery because this already gets me through a day full of activity. Anyone else find the battery life on this device, quite handy? Mine is rooted, but it's stock ROM. I'm also using a skin posted by a member of our forum, the transparency. I'm running the stock T-MOUS(why is it called tmous..? are people that lazy to spell out t-mobile?) ROM, because I accidentally deleted a few apps I discovered I needed back, and did not do a backup. Oh, and I'm also using the battery mod, for the battery icon in my notification bar.
I guess I'm just praising the battery life, is all

I have only had my sensation for about 5 days and battery life is amazing! Im still stock too.. I came from an evo 4g rooted running cm7 and or miui and battery life doesn't come close to being as good as my sensation. Not only is battery life awesome, this phone is awesome. I moved to Southern California a couple weeks ago and Sprint out here is horrible.. so I switched and couldn't be happier. Plus I like this phone was better than the evo series. Battery life is sweet!
Sent from my HTC Sensation 4G using XDA Premium App

You would have to post a screendoor shot of your battery usage and screen on time to completely determine how much the phone was used and how long the screen was on.
Bluetooth and GPS don't use any battery or have low usage (depends on the chipset because some completely turn off) during standby since they're not being used at all.
So we can all praise our phones for having good battery life, but it all depends on usage. If you don't use your phone a lot (you could turn on your screen every 5 minutes but at the end of the day have only like 45 minutes of screen on time and like 70% battery left.) Then you get good battery life. Use your phone a lot and quite simply battery life sucks.
Sent from my LG-P999 using XDA App

I think it can largely depend on how you use your phone, not just how often or for how long. For example my Fiance also has the Sensation and on her first charge she got 3hrs52minutes before hitting 10% battery. Since then she has only gotten ~2hrs each day now that she has Twitter and Facebook for Sense accounts set up.

That's not good. There's gotta be something wrong with either her phone or something. 2 hours of battery life warrants an exchange.
lokhor said:
I think it can largely depend on how you use your phone, not just how often or for how long. For example my Fiance also has the Sensation and on her first charge she got 3hrs52minutes before hitting 10% battery. Since then she has only gotten ~2hrs each day now that she has Twitter and Facebook for Sense accounts set up.
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Sent from my LG-P999 using XDA App

enoch861 said:
That's not good. There's gotta be something wrong with either her phone or something. 2 hours of battery life warrants an exchange.
Sent from my LG-P999 using XDA App
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The phone lasts longer than 2hrs, that's 2hrs of the screen being on. my sensation get's about the same. This is with Gmail on Autosync and Twitter/Facebook for Sense accounts enabled too.

If I do what u did, my batt will be flat in 6 hours. Somethings just not right with my sensation.
xSeany said:
I think it's crazy how many people are downing the battery life on the Sensation. I used my phone a bit today. Off the charger at 10AM, used GPS to go to work with Bluetooth activated as well. Forgot to turn them both off while at work. I used my phone like ever 5 minutes checking Twitter updates(also weather/news/facebook/email/etc updates are automatically updating as fast as the app allows. So quick updates for all my apps, GPS and bluetooth turned on all day. Home around 5, watched a few episodes of South Park on Netflix with my phone. Read some news. Played a few different games for about 5-10min each just trying out new games. It's now almost 1AM the next day, and I'm above 40% battery life. I manage my screen brightness, that may be the only thing I remembered to manage well today. While outside/in car, full brightness, inside, as low as possible.
It's shocking to me when I see threads of how the battery life stinks. I'm using the stock battery, I don't even seen the need of getting a larger battery because this already gets me through a day full of activity. Anyone else find the battery life on this device, quite handy? Mine is rooted, but it's stock ROM. I'm also using a skin posted by a member of our forum, the transparency. I'm running the stock T-MOUS(why is it called tmous..? are people that lazy to spell out t-mobile?) ROM, because I accidentally deleted a few apps I discovered I needed back, and did not do a backup. Oh, and I'm also using the battery mod, for the battery icon in my notification bar.
I guess I'm just praising the battery life, is all
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Sent from my HTC Sensation Z710e using XDA App

Oh! Makes sense..
But 2 hours with screen and dead in 6 hours? I'm glad I have a G2x then. Cause I get 3 hours and like between 13 and 16 hours.
lokhor said:
The phone lasts longer than 2hrs, that's 2hrs of the screen being on. my sensation get's about the same. This is with Gmail on Autosync and Twitter/Facebook for Sense accounts enabled too.
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Sent from my LG-P999 using XDA App

You can go by statistics and on screen time and what not. but I just got home from work, and I literally used my phone for about 2 hours straight calling carriers for a customer. I'm above 80%. So from 9AM-4PM, only saw a 20% drain. Once again, keeping BT and GPS on just to see how it goes. ALL of my autosyncs are once again, on, and set to the most frequent can be.
Compared to any other stock phone, this is amazing. Compared to my Cyan N1 and my Cyan NS, it's not a huge difference. Although, at this rate I may give the lead to the Sensation, since I'm leaving all these extra features on throughout the entire day.

good
I get two to three days out of my Sensation, and I'm a relatively heavy Internet user... don't phone much.
At first I wasn't getting great mileage - having to re-charge after only 10 hours or so, but did two things to improve it dramatically...
First, charge the battery once using the following method:
1. charge battery to 100% and leave on charger for an extra hour
2. unplug the cable, turn off* the phone, and plug the charger back in. leave charging for another hour.
3. unplug the phone, turn it on for two minutes, turn the phone back off*, and plug in the phone again. leave charging for another hour.
* when I say "turn off", I mean completely, without fastboot. so either disable fastboot before switching off, or turn off the phone and pull the battery then put it back in.
Second:
Turn off automatic screen brightness, and set the brightness manually to what you need. Ideally, I'd like to have an auto-screen brightness adjustment that automatically sets it, say, 25% lower than what the built-in function does.

That's pretty exceptional. I usually get 13-14 hours with 5+ hours of screen time before I'm at 20%. Using the chichitec battery, btw.

My chichitec battery went 18 hours yesterday before it got to 10% and I charged it. That was with a lot of web browsing, some phone calls, music, games. Id say, medium-heavy usage.
Matt

Same here I have had several Android phones with different carriers and this is hands down the best, on par with the iPhone I had previously with Verizon. No problem getting through the day with Exchange and 2 IMAP accounts and heavy phone use, the only mod is I set screen brightness, battery is stock.
Sent from my HTC Sensation 4G using XDA App

no one is complaining i watch sparticus on netflix and game of throne on hbo go for 5 hrs straight while facebooking random hoes . and i am out of battery..
we are complaining that the 4g drains the phone while on idle.

this is the best battery life i've ever had on a phone. i can't complain at all... i even have gps on and i could never do that before. lol!

Guys, having GPS on doesn't use any battery. It only uses battery when it is active. So for most of you 99% of the time your GPS is off aka standby or whatever you wanna call it.
Sent from my LG-P999 using XDA App

One reason many people complain about bad battery life is that it seems some Sensation models are actually faulty. Best evidence: TechRadar review.
http://www.techradar.com/reviews/phones/mobile-phones/htc-sensation-943466/review?artc_pg=9
UPDATE: We've finally managed to get our hands on a new review model of the HTC Sensation, and the good news is the battery life is definitely improved.
It seems that a combination of data-hungry applications and a slightly dodgy model caused the odd readings from before, although we're not entirely convinced the above scenario isn't one power users will face, which is why we've left it in.
But in normal use, and by that we mean sending 42 texts, spending 49 mins on the phone, watching an hour and bit of video and using the music player constantly, plus a few minutes spent using GPS to track ourselves and browsing the internet for roughly 45 mins, the battery pretty much lasted the day, although it was often in the yellow zone come 11PM.
However, what was more impressive (and a relief) was the sleep state of the HTC Sensation. Where before the phone would get very hot and start spewing out battery life in our pocket for no reason, if you leave the phone locked up for around 10-15 minutes on our new model the power consumption dropped to almost nothing.
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Getting best battery per charge out of your skyrocket.

I am opening this thread to facilitate skyrocket users to share their experiences on getting most out of one charge.
I generally prefer something that shows percentage on top since the battery display does not provide detailed info.
I have tried few free aaps and finally found the best one. It is '2x battery' app. I used to loose 4 - 7% per hour in standby mode. With this app, It gives me 1-2% most in burn in hour. While writing this, I am 36% after 17 hours of regular use.
Sent from my SAMSUNG-SGH-I727 using XDA App

WIZARDfan said:
I am opening this thread to facilitate skyrocket users to share their experiences on getting most out of one charge.
I generally prefer something that shows percentage on top since the battery display does not provide detailed info.
I have tried few free aaps and finally found the best one. It is '2x battery' app. I used to loose 4 - 7% per hour in standby mode. With this app, It gives me 1-2% most in burn in hour. While writing this, I am 36% after 17 hours of regular use.
Sent from my SAMSUNG-SGH-I727 using XDA App
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im at 11 hours and have 89% left using Juice Defender plus..

The only problem with JuiceDefender is that if you use messaging apps like Kik or WhatsApp, it will make it so that you don't receive the messages unless you have your phone active, making your phone pretty much useless.

I dont buy anything til I see proof of screen time and battery use screens.
Just got the phone yesterday, but I must say, coming from the epic 4g touch where I was getting 25 hours with 5 hours screen on time, it doesn't look promising.
But to be fair I haven't underclocked, undervolted and all the other tricks yet. Properly working sleep mode is essential.
Sent from my SAMSUNG-SGH-I727 using XDA App

ShensMobile said:
The only problem with JuiceDefender is that if you use messaging apps like Kik or WhatsApp, it will make it so that you don't receive the messages unless you have your phone active, making your phone pretty much useless.
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+1
Sent from my SAMSUNG-SGH-I727 using Tapatalk

I will try the 2x battery,

I use JuiceDefenderPro; custom profile
After 7 hours on battery, I am at 90%.
light calls, 1-bar of signal on 4gLTE, apps grab data every 15 minutes.

Anyone see results w/ underclocking?
I am using Antutu's CPU Master (Free), but my results have been inconclusive (sometimes uses less, sometimes uses more.. can't tell). I am considering getting the paid version of the app (or SetCPU or Android Overclock) to try the screen off profiles.

I use set CPU to underclock when the screen is off and when battery is low. In my experiences the savings are noticeable but not major.
With set CPU, juice defender, and a de-bloated rom I usually go to bed with around 30% battery remaining. That's about on par with my nexus one running cm7.
Sent from my SAMSUNG-SGH-I727 using xda premium

I haven't really had issues with the battery on my skyrocket. Then again, I'm not I'm an LTE area but you can pretty much expect bad battery life in an LTE area. Regardless, I have noticed something odd about the battery on my skyrocket, and maybe someone can confirm my observations here...my skyrocket tends to lose battery fairly constantly at first up to about the 80% mark then slows down the rate off loss of charge and I notice another huge slow down in drainage at the 30% mark. I've seen this repeatedly no matter what I do. In other words, screen on or off, I tend to see this happen. I'm not complaining as I think a 20 hour battery is great when using it heavily. And I kind of think of the slow drainage at the 30% as a nice perk. I'm running it stock so I can't chock it up to anythnng other than the phone. Any thoughts?

s3v3n777 said:
I haven't really had issues with the battery on my skyrocket. Then again, I'm not I'm an LTE area but you can pretty much expect bad battery life in an LTE area. Regardless, I have noticed something odd about the battery on my skyrocket, and maybe someone can confirm my observations here...my skyrocket tends to lose battery fairly constantly at first up to about the 80% mark then slows down the rate off loss of charge and I notice another huge slow down in drainage at the 30% mark. I've seen this repeatedly no matter what I do. In other words, screen on or off, I tend to see this happen. I'm not complaining as I think a 20 hour battery is great when using it heavily. And I kind of think of the slow drainage at the 30% as a nice perk. I'm running it stock so I can't chock it up to anythnng other than the phone. Any thoughts?
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Why does everyone say this about LTE? It is simply not true. All LTE does is give you higher bandwidth with less delay. Wan't good battery life, run a custom ROM. I am running the ICS v4.1 and I must say it is much better than anything else I have tried. I keep 4sq, FB, twitter and gmail all running in the background along with BeWeather updating every hour.

shansmi said:
Why does everyone say this about LTE? It is simply not true. All LTE does is give you higher bandwidth with less delay. Wan't good battery life, run a custom ROM. I am running the ICS v4.1 and I must say it is much better than anything else I have tried. I keep 4sq, FB, twitter and gmail all running in the background along with BeWeather updating every hour.
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Indeed I am on red sonja and I have no issues with battery life on this phone.
She is a sexy rom
Sent from my SAMSUNG-SGH-I727 using xda premium

shansmi said:
Why does everyone say this about LTE? It is simply not true. All LTE does is give you higher bandwidth with less delay. Wan't good battery life, run a custom ROM. I am running the ICS v4.1 and I must say it is much better than anything else I have tried. I keep 4sq, FB, twitter and gmail all running in the background along with BeWeather updating every hour.
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Everyone says that about LTE because (from what I've read) running LTE requires more power due to several reasons. I did a quick search and sprint may be a great indication of proof of the power consumption of "4g" from what I've read their phones disengage wimax when not in use in order to conserve energy. If LTE is faster and operates at higher frequencies (if I'm not mistaken) then it should require more energy. I could go outside the box and come up with some equations that relate frequency to energy (they exist) but I will admit I don't know if they can be applied to the circuitry in phones though I don't see why it wouldn't as the theory is sound. In any case, yes running a custom rom will do wonders for battery but some of us haven't taken that plunge yet. As it is, my stock skyrocket is doing great for me lasting 20 hours. Im out of the house at 6am and usually don't get home till 8 at night. It makes it through that with ease. I'm happy with that. Bring on the LTE, I'll cross that battery consumption bridge when we get there.