Database Users

[Q] Battery problems... still...

Ok so I know I've posted about my battery before but I still can't get any relief.. I'm running JT .9 and geekniks 12/19 kernel.. the past two nights my battery drained 30% over an 8 hour period, with no one touching it! During both these nights I turned off Auto-Sync, and yes GPS and WIFI are both off..
Just now I had my phone charging and it was at 47%.. I rebooted my phone (just my normal procedure about once a day) and when it came back up a few seconds later it was at 69%!!! What gives?!?! Anyone have any ideas??
I have tried re calibrating the battery by deleting the battery stats method.. I tried calling verizon to get the battery replaced but was told that my battery is acting normal.. ive tried different kernels with no noticiable difference.. if i take my phone off the charger at 100% and send just a few text messages it will be down to 95% within minutes.. im at a loss.. I'll post pics of my battery use screen in a bit but throughout the night i only went 1% without a signal.

Maybe try *228 Option 2 ..... ??
I had a bout of some wicked battery drain and it was because I needed to update my roaming.....

slvrevoix said:
Maybe try *228 Option 2 ..... ??
I had a bout of some wicked battery drain and it was because I needed to update my roaming.....
Click to expand...
Click to collapse
I've tried that too.. question about that though.. I live about 30 miles from where I work.. should I update my roaming where I live or where I work or does that even matter?
Thanks for the response!

I have the exact same problem. Battery will drain for no apparent reason. I even bought a brand new battery, with still no luck. When I reboot the phone, as you said, something it will jump up 20%. I finally got fed up charging 4 times a day and ordered a refurbished phone. I'll let you know how that one works out.

papstar said:
I have the exact same problem. Battery will drain for no apparent reason. I even bought a brand new battery, with still no luck. When I reboot the phone, as you said, something it will jump up 20%. I finally got fed up charging 4 times a day and ordered a refurbished phone. I'll let you know how that one works out.
Click to expand...
Click to collapse
Please do.. Verizon give you the phone or did you just pay out of pocket?

Turn your 3G off overnight if you're not on the charger.
Wipe batt stats in CWM/advanced, charge until you get the full battery popup

NOsquid said:
Turn your 3G off overnight if you're not on the charger.
Wipe batt stats in CWM/advanced, charge until you get the full battery popup
Click to expand...
Click to collapse
I've tried wiping battery stats in CWM.. not sure how to turn off 3g.. Juice defender did it when I ran that but I didnt see an improvement and I didnt like the fact that it turned off 3g everytime my screen was off because then I don't get push on my emails.

Juice Defender has an on/off widget for 3G

Powell730 said:
I've tried wiping battery stats in CWM.. not sure how to turn off 3g.. Juice defender did it when I ran that but I didnt see an improvement and I didnt like the fact that it turned off 3g everytime my screen was off because then I don't get push on my emails.
Click to expand...
Click to collapse
although Juice Defender turns off your 3g when the screen is off, it also turns on your 3g for 1 minute every 15 minutes, so push notifications will be seen every 15 minutes (which I find totally acceptable to dramatically raise my battery life)
Just an fyi in case you didn't know.

Dalamar1320 said:
although Juice Defender turns off your 3g when the screen is off, it also turns on your 3g for 1 minute every 15 minutes, so push notifications will be seen every 15 minutes (which I find totally acceptable to dramatically raise my battery life)
Just an fyi in case you didn't know.
Click to expand...
Click to collapse
yeah i was aware of that but i also didnt notice my battery life improve enough to use it.. if i would have noticed a dramatic improve i would have kept it.

At first I didn't notice an increase either, but after a day or 2. I get over 50% battery now

I just started charing my phone again.. it was at 70%.. i rebooted my phone and it jumped 14% to 84%... is it possible that the battery meter is just not accurate and when I reboot my phone it recalibrates everything and displays a true reading?

I can't remember where I read it, but I read that the phone doesn't portray an accurate reading. . If you charge to a hundred percent, the phone reduces the amount of power coming in but still shows full till removed from the charger, then it drops fast. Supposedly once it gets down to a certain percentage it starts charging again in bursts. This could explain why rebooting changes your percentage since the OS is showing the inaccurate reading.
I don't know if this is true or not, just something I read.

There's an excellent explanation of this here on xda. The thread is called "Your battery gauge is lying to you (and why that's not such a bad thing)" & I wish I could remember who wrote it so I could give him credit.
Sent from my SCH-I500 using XDA App

Powell730 said:
Please do.. Verizon give you the phone or did you just pay out of pocket?
Click to expand...
Click to collapse
I called VZW's Customer Service and told them about my issues and they sent me a refurbished one. Just got it today, and so far, I'm having the exact same issues.

I am only here because a friend of mine is looking to get a Fascinate and I was doing some research for him.
I have an Evo, and I gotta say, you only lost 30% in 8 hours? Lucky you! The Evo, when it first came out would only last about 8 hours off the charger from a full charge, without touching it. The state of things now is a lot better. I can go 16 hours off the charger and still have 70-50% battery left depending on how much I used it.
The biggest changes have been custom undervolted kernels with HAVS, CPU underclocking with screen off, and "SBC" which probably just stands for super battery charge.
The SBC kernels for the Evo fix the issue of the battery dropping to about 87% minutes after taking it off the charger. It changes the charging behavior after full charge, maintains a trickle charge to hold battery voltage at 4.2v instead of burst charging intermittently once "full"
You guys might want to have your kernel developers look over here and probably see if some secrets can be passed along:
http://forum.xda-developers.com/showthread.php?t=876590
There's a neverending cornucopia of battery improvements over in the Evo forum and I'd suggest you guys go make a search over there for "battery" because tons of the same fixes are going to apply here. Good luck

papstar said:
I called VZW's Customer Service and told them about my issues and they sent me a refurbished one. Just got it today, and so far, I'm having the exact same issues.
Click to expand...
Click to collapse
I had a lot of similiar issues with battery life, and I found different kernels and roms have a huge effect on the battery:
Every StupidFast kernel I tried would *significantly* increase battery drain over stock. I'm talking 4-5% per hour overnight with the phone idle and not being touched or doing anything whatsoever - no GPS, no Bluetooth, no WiFi, no apps running, just sitting there.
Every BlackHole ROM I tried would do pretty much the same, although not quite as drastic.
JT's SuperClean was consistently very good on the battery.
On DI01, I was using SuperClean .4 on the stock kernel and getting a solid 24 hours on a charge. With DJ05, there is no stock kernel, and I had issues with SuperClean and signal strength, so I'm using the 12/12 kernel with the stock rom (debloated) and I'm getting 72 hours on a charge with conservative use and easily 48 hours with moderate use.
If you're using StupidFast, I'd suggest flashing one of JT's kernels or stock (if you're still on DI01) and see what difference it makes.

I finally am getting decent battery life.. I did a clean wipe and installed black hole 2.4 with jt's 11/29 kernel and have noticed a great improvement! Only problem is I get the audio popping with this kernel but I'll live with that as long as my battery is better.
Sent from my SCH-I500 using XDA App

So I've gotten my second refurbished fascinate from Verizon, and my battery life is still atrocious. However, how much does signal strength affect battery life? I get a dismal signal at my house, where my battery seems to drain like crazy. Can anyone confirm the relation?
Sent from my SCH-I500 using XDA App

papstar said:
So I've gotten my second refurbished fascinate from Verizon, and my battery life is still atrocious. However, how much does signal strength affect battery life? I get a dismal signal at my house, where my battery seems to drain like crazy. Can anyone confirm the relation?
Sent from my SCH-I500 using XDA App
Click to expand...
Click to collapse
They are directly related. If your phone if constantly trying to find a signal then this will drain your battery. Are you rooted, or totally stock?
Sent from my SCH-I500 using XDA App

Acceptable Battery life?

I have read many other threads about improving battery life and such but I am still at a loss. My battery in my Epic is only lasting about 5 hours(9AM~1:30PM). I have a moderate signal the whole time and I am using the phone but I only have the screen on about 10% of the time according to Battery Stats(forget where I found this info, maybe spare parts?)
I have turned off Wifi, bluetooth, 4g, GPS only turns on when I open an app that needs it. I really have no idea what I am doing wrong since this seems to be completely terrible battery life. I have also killed the drm service and have found that it did not help my battery life much.
I am rooted and running Syndicate Rom 1.0.2(not froyo since I use a Mac and have not gotten my hands on a pc). I am using Xtreme Kernel clocked at a max of 1ghz.
Any other tips? Should I take the phone to Sprint and ask for a new battery? The phone at this point is only about 3 months old. If this seems to be normal for battery life then I am pretty sure I will be jumping ship and getting a new phone.
Zach

mttallaczach said:
I have read many other threads about improving battery life and such but I am still at a loss. My battery in my Epic is only lasting about 5 hours(9AM~1:30PM). I have a moderate signal the whole time and I am using the phone but I only have the screen on about 10% of the time according to Battery Stats(forget where I found this info, maybe spare parts?)
I have turned off Wifi, bluetooth, 4g, GPS only turns on when I open an app that needs it. I really have no idea what I am doing wrong since this seems to be completely terrible battery life. I have also killed the drm service and have found that it did not help my battery life much.
I am rooted and running Syndicate Rom 1.0.2(not froyo since I use a Mac and have not gotten my hands on a pc). I am using Xtreme Kernel clocked at a max of 1ghz.
Any other tips? Should I take the phone to Sprint and ask for a new battery? The phone at this point is only about 3 months old. If this seems to be normal for battery life then I am pretty sure I will be jumping ship and getting a new phone.
Zach
Click to expand...
Click to collapse
Only advise I have is to toggle airplane mode after every boot and switch from the extreme kernel to pheonix 1.43, it has the best battery life by far as will any of the phenix kernels but 1.43 is the best
Sent from my SPH-D700 using XDA App

I got 25 hours of a charge the other day. Had to grab a screen shot real quick before it **** down. Might frame it. On stock dk28 with moderate use, lots of pics...it was on christmas so it was prety well used, trying to escape conversations with in laws.
Sent from my SPH-D700 using XDA App

I'm having the same exact problem. Same ROM and everything. I'm getting absolutely terrible battery life, maybe 5hrs on a full charge. Its ridiculous especially seeing how the nexus s is basically the same phone and gets nearly 20 hrs with no problem. WTF!!!??

Would bet a dollar that your phone is not entering sleep mode properly. Download Spare parts, charge your phone up, unplug it and turn the screen off and wait for like 10-20 minutes and then turn it on and open spare parts and look under Battery History. You will see that it will say Running 100% or something high like that.
This is probably because of something you set up. Either facebook updating every 30 seconds or maybe push email. I dont know.

I pretty much always get at least 24 hours and I work in a basement where I barely get a signal. I leave wifi on all day. I talk for about 20-45 a day on average. I listen to music for a couple hours a day. I play games for a good half hour of my lunch break and sometimes for an hour or two at night. Sometimes I forget to turn my gps off for half the day while I'm in the basement.
I have killed a battery in 6 hours when I spent the entire time downloading and playing games. And I had a battery last 42 hours a couple weeks ago when I was helping a buddy work on a car. We used it to drive some crappy pc speakers for music for about 8 hours in those two days and I spent a couple hours over those two days looking for info to help us diagnose his car.
I have been on Mammon's DK28 for a few weeks and have mostly been on the latest FroYo roms since the leaks starting hitting the public. I ran the same rom and kernel as you guys for a couple weeks, and I don't remember the battery being that bad. IIRC, I was overclocked and still saw 18+ hours of battery life with normal usage.
What are we doing differently? That is the question. Do you have a bunch of widgets and a live wallpaper? I don't. I try to keep my widgets pretty minimal. I have TWC on one screen, a flashlight widget on my main screen, and Pandora and PowerAmp on a third. I generally use a pretty dark wallpaper, too. Something simple and easy on the eyes as well as the amoled. I also keep my wifi on and set it to never sleep wifi. Why? So it doesn't search for a 3g data connection. I have wireless networks I can connect to in the places where I spend most of my time, so I might as well use them. Sure it has to power up the wifi radio, but the wifi radio seems to use very little power when you're sitting somewhere with a good signal. Also, read "How to Train Your Dragon" in the dev section. I have three batteries and generally reset the battery stats on one of them every two weeks. If you only have one battery, every 3-4 weeks is suggested. I always charge my batteries in the charger and almost never plug my phone in (because I don't have to) and about half the time I bump charge the battery after it is finished. Be careful with bump charging as it can reduce the number of charge cycles your battery can take, but can net you 10-15% more capacity in the short term. I rarely discharge my batteries below 15% except for when I'm recalibrating them. If you discharge your battery to too low of a voltage it can reduce capacity. And if voltage is reduced too low, it won't charge at all, but may be fixable with a cadex machine.
Be sure to go find that thread on how to train your dragon. There are some links in there that will teach you a good bit about how lithium ion batteries work and what you can do with them. After that, you need to see what is running on your phone to use that much battery. Is some process or group of process eating your processor?
edit: Look Mom, I wrote a book!

I will try changing kernels and updating to froyo(maybe hijack my dad's netbook).
If this doesn't work then I am going to go to sprint and see if they will swap out my battery. I tried the thing with spare parts and it says time running is 18% since last unplug which seems a bit high but not too ridiculous.
I have read and followed the instructions in how to train your dragon. I am really starting to think it is a faulty battery. I will report back, thank you everyone for the advice.

ok, thank you all for the advice. I am able to get through a whole day now on a charge since changing to Phoenix. Maxes out at about 10 hours as long as I am not constantly on it.
Updating to froyo later today.

Not really going to be helpful for you, but just my observation:
DK28 has MURDERED my battery life. Lots of people have issues with DK28, but the GPS, accelerometer, etc but all that stuff works fine for me - the only problem is the mega hit battery life took.
Let's hope the official release isn't as bad.

DK28 probably murdered your battery life because you forgot to do one of the battery saving techniques that you were using on your previous DI18 rom. Pretty much everyone else is seeing battery improvements with DK28.

I don't think so. I never use GPS, 4G or Wifi and I've always had the brightness auto adjust on.

[Q] What's your Battery Life after EB01

I hear constant griping about battery life since EB01. So I was curious what amount of time are people getting on their full charge? I am getting about 13hours. Definitely less than before but tolerable. Have done all the battery wiping techniques. Why is there such a different between users?

I get about 15 hours of good use out of it since updating to EB01. this is with moderate use.

After about 18 hours, I'm generally ~1/3rd the battery left. I'd say a large part of the variance is how we actually use it. I think it'd be good if at the end of the day, you wrote down the unplugged time, the % remaining, the % of the top several items in battery use, as WELL as the actually amount of time for each of them. Right now 'display' has used 41% of my battery, but only been on for 11m45s (the phone has been unplugged for 6h45m, with 72% remaining).
Without the full context, it's extremely hard to actually have any idea what's going on (terms like 'light'/'heavy' use are totally meaningless). One person that regularly gets 2 days (depending on my use I can easily), vs a person that can barely make it through a day... that doesn't mean that the latter person's phone is messed up, they might stream LOTS of music & videos, while the other leaves theirs in airplane mode half the time.
Edit: I'm on SC 2.1, with GPS, all location services, WiFi, and auto rotate off. I leave sync on always, and I'm nearly to 9 hours now... with still 72% remaining... and just dropped to 71%!

Horrible... with vanilla froyo v5 it was amazing, but every other has been almost intolerable. Sc2.4,blackhole,gingerbread... I've tried all of them, for several batt cycles. On second day of miui, ill report in a few days. I've always flashed at full battle, never have GPS or wifi on, turn sync off a lot, and always have my screen turned down. I'm at around 10 ta 13% drain an hour
Sent from my SCH-I500 using XDA App

I know I said I was getting 12-13 hours. Well I did the battery script download and am now at 63% after 12 hours. I would highly recommend giving it a try. It didn't seem to do anything the first day. More the second day couldn't be happier.
Sent from my SCH-I500 using XDA App

SC2.2 nonvoodoo with no power management apps. Overnight off charger for 8 hours battery loss is about 3%. My typical numbers starting from a full charge averaged below.
Screen 3.5 hours.
Calls 45min.
Gmail sync avg. 20 emails.
SMS avg. 30
TWS +/- 4%
BW weather updates hourly.
Those numbers usually get me to about 15-20% battery. So with that usage it can be done in one day or I have also stretched that usage over 2 days.
good day.

Anybody try any of the battery saver apps like super power or juice defender? I have tried juice defender but it wasn't toggling data so now I'm trying superpower & it toggles fine but keeps the phone in partial wake according to spare parts so I wonder if there's any real benefit... I'm now down to 11% after 10 hrs off the charge.
Sent from my SuperClean'd SGS

After trying the battery wipe script, and several battery cycles, I'm about 1/3 less battery life than I was on DL09. I'm hoping once we get source, we can get a LV optimized kernel to get it back to where it was.

garywojdan81 said:
Anybody try any of the battery saver apps like super power or juice defender?
Click to expand...
Click to collapse
I used Juice Defender back on DL05, but found that it made my battery run down faster AND it'd cause many of my apps to update inconsistently (using both the default setting, as well as others). Even after disabling, and then uninstalling it, my sync settings were screwed up until I flashed EB01.
I'm not going to trust any of those apps again... thinks work better if you just find apps that aren't power hogs (such as constantly polling the network!).

Back on DL09 SC 0.9, with Adrynalyne's undervolted Voodoo kernel, I could get two days with light usage without trying very hard. Now on EB01 SC 2.4, I struggle to make a full day. Not sure if the drain can be fixed with working kernel source code or not, but I imagine it will help a lot. Until then, I can't bring myself to go back to Eclair again, so for the moment I'm putting up with the poorer battery life and lack of Voodoo sound.
Posted from my EB01 SuperClean Fascinate with Voodoo

Anyone else getting poor battery life with EC05?

I have the device on auto-brightness settings. I will say that the auto-brightness IS pretty bright with EC05. MUCH brighter than other versions. Anyone else noticing this?
I came from EB13 and I got excellent battery life. So far, today, while getting full bars:
Time on: 7 Hours 21 minutes since unplugged
Time on display: 56 minutes (86%)
Voice calls: 8 minutes
Total battery left: 32%. That's a far cry from what I was getting with EB13.
Otherwise, I'm pretty happy with this version! Although, EB13 was awesome as well. I just had a bit more force closes here and there on EB13.

Took mine off the charger around 8am with moderate use mine tanked around 6. I also live in an excellent 3G/4G area.
Sent from my SPH-D700 using XDA App

Be patient, it will get better in couple weeks.
Sent from my SPH-D700 using XDA App

Any reason why?

Its probably the brightness broham. Try turning it on manual and keep it as low as possible. The screen is the biggest stress on the battery. The brighter the background the worse the battery life as well.

re: waiting a while... the battery gets 'conditioned'... look up one of the MANY threads on that subject on here... some you have to be an astrophysicist to understand, but interesting nonetheless. Re: brightness, yeah, turn it on manual, set it on lowest poss setting, indoors most of the time its plenty bright, and if your ROM didnt disable it (idunno why they would) hold down your status bar and a little drop thingy comes down, slide L or R for brightness, like for outside, or if you really wanna make an EVO user sad and show off the AMOLED mmmmm..... contrast ratio and black levels....

This is some of the best battery life I have gotten out of this phone period. Its so good I dont even want to flash a custom ROM. I have brightness turned down. F that auto brightness..I hate that feature. I unplugged today at 6 in the morning...Played on it before work....Played while at work.....Some more after work...A little while driving...(dont judge me) ....... And now Im on it playing poker online. I love it. Im so serious about not flashing a custom ROM. I am loving this new update and its battery life.

DangerZone1223 said:
I have the device on auto-brightness settings. I will say that the auto-brightness IS pretty bright with EC05. MUCH brighter than other versions. Anyone else noticing this?
I came from EB13 and I got excellent battery life. So far, today, while getting full bars:
Time on: 7 Hours 21 minutes since unplugged
Time on display: 56 minutes (86%)
Voice calls: 8 minutes
Total battery left: 32%. That's a far cry from what I was getting with EB13.
Otherwise, I'm pretty happy with this version! Although, EB13 was awesome as well. I just had a bit more force closes here and there on EB13.
Click to expand...
Click to collapse
This is EXACTLY my usage patterns and battery for the last 2 days. The only way I'm getting 14 hours out of this thing is if I don't turn it on once. And fixing the brightness isn't going to help me too much if it loses 80% just sitting there idle is it? I'm pretty close to just flashing it back to DI18, declining updates (or flashing the Syndicate rom from that era) and just living with it. For the record, I also had miserable battery with everything DK28 and EB13. Perhaps my phone just doesn't like Froyo?

youngpro83 said:
This is some of the best battery life I have gotten out of this phone period. Its so good I dont even want to flash a custom ROM. I have brightness turned down. F that auto brightness..I hate that feature. I unplugged today at 6 in the morning...Played on it before work....Played while at work.....Some more after work...A little while driving...(dont judge me) ....... And now Im on it playing poker online. I love it. Im so serious about not flashing a custom ROM. I am loving this new update and its battery life.
Click to expand...
Click to collapse
No playing on the phone while driving.... lol I do it all the time too. Im on here alot while driving.
Sent From My Evo Killer!

I keep hearing about not all batteries are equal I wonder how true that is. I just flashed the ACS SyndicateROM Frozen 1.0.2 and I am curious to see how my battery life is on the road tomorrow..errr...today at this point.
I know if I am using it off and on pretty constantly I get no more than 6hours with moderate activity (email, web, occasional phone call) we will see what happens now that I am on this ROM.
I told myself I wouldn't go to a non-factory ROM but this is stable, runs the processor with less power @1GHz and with the click of a button you have on-demand 1.2GHz.
A few other things I noticed is the interface is MUCH snappier even though I am using the TouchWiz launcher and the "Fully Loaded" Version I can't wait to see how it goes.

After 2 days on EC05 my battery life is ok, but not as good as when I used a custom undervolting kernel. After 12 hours I'm at about 40%. Today I'm going to try using setCPU to run a different profile and see if it works or makes a difference.

i havent seen good battery life since 2.1 :/ i used to get 24 hours of use with epic experience and the phoenix kernel.
no way im going back to 2.1 just for battery life. although it is the most important thing to me
Sent from my SPH-D700 using XDA App

I have bad battery life with EC05. Tested today with only 3 texts, and two 10 minute phone calls.
8 hours of standby time and I've burned 5.25% of battery per hour.
Wifi on 99% of the time and within range. Policy = never sleep
Same usage for the weekend on DI18 I'd be around ~85% rather than my current 57%.
My battery life is even worse for work days when I have Lotus Notes Traveler sync scheduling every 15 minutes.
DI18 end % of 8 hours of work = ~70-75%
EC05 end % of 8 hours of work = ~43%

worldwidepmp said:
Took mine off the charger around 8am with moderate use mine tanked around 6. I also live in an excellent 3G/4G area.
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
Just to follow up, I flashed back to Bonsai 4.0 and unplugged at the same time today(8AM.) it's now 8:00p and I'm at 66% battery with just about the same amount of moderate usage.

usfslacker said:
This is EXACTLY my usage patterns and battery for the last 2 days. The only way I'm getting 14 hours out of this thing is if I don't turn it on once. And fixing the brightness isn't going to help me too much if it loses 80% just sitting there idle is it? I'm pretty close to just flashing it back to DI18, declining updates (or flashing the Syndicate rom from that era) and just living with it. For the record, I also had miserable battery with everything DK28 and EB13. Perhaps my phone just doesn't like Froyo?
Click to expand...
Click to collapse
Take it in and tell the sprint rep. Maybe you could get a new battery for free. if not you may want to buy one.

Automatic Brightness says that it will hurt your battery more then manually setting your brightness. Gosh, no wonder why so many people complain about battery life. No one can read anymore. Seriously, my battery life is the exact same as DI18 as it is on EC05. Learn how to use your phone efficiently.
Also take into account EC05 is Froyo, and DI18 is Eclair. A big difference in how they have to be treated. You will hurt your battery more doing certain things in Froyo then you did in Eclair, one example is Task Killing.
And if you dare to have the nerve to disagree with me, I'll redirect you to "Poor Battery Life" threads from EVERY SINGLE DEVICE on XDA. I doubt every carrier and company is making the battery life horrible, nah just the users.

Does that mean we should NOT kill tasks on froyo?

hold down your status bar and a little drop thingy comes down, slide L or R for brightness, [/QUOTE]
See, thanks for that info. I thought that feature was disabled on froyo builds. Even with you saying it works, its very rare that it works for me. On 2.1 it was so easy to swipe and adjust it....
Sent from my SPH-D700 using Tapatalk

I'm getting some pretty good battery life with ec05 so far. Right now I'm at 13% battery and here's the usage:
23hrs 39mins
display 78%, 1hr 49mins
cell standby 12%, tws 30% (I still get that bug from time to time, but not always like before)
voice calls 7% 19mins
phone idle 4% 21hrs 50mins
I had odin'd back to di18 and got ec05 ota friday morning, still not even rooted. I keep brightness at the lowest setting and use a black background.

slybarman said:
Does that mean we should NOT kill tasks on froyo?
Click to expand...
Click to collapse
Yes, you should not kill task or applications at all in froyo.
Sent from my SPH-D700 using XDA Premium App

Battery life been sucking...

I don't know if it's my imagination, but since the 2.4.6 update, my battery life has dropped a bit. By the time I get into my office from my morning commute, I'm anywhere in the 65-70% battery life after unplugging from a full charge. I haven't done anything new. I always unplug around 8:30 am when I head out, I do some light chatting with gf, browse some sites, check facebook (usually very briefly), and maybe sometimes do a little reading on my device. By the time I get into the office around 9:30 or 10 AM, I'm usually around the 80-85% area with battery.
Lately, doing the same thing, I'm seeing the aforementioned 65-70%.
Is anyone else experiencing decreased battery life since 2.3.6?
I'm on a Tmobile Nexus S, running stock 2.3.6 (no custom ROMs).

2.4.6 ? .... maybe 2.3.6 ... and yes, I also noticed a slight increase in power consuption after the upgrade. The stand-by is still great .. about 0.8 - 1% per hour.

Sorry, yes I meant 2.3.6.
Thanks for replying Ro_explorer. Is your increased power consumption significant? Seeing 65-70% when I'm used to seeing 80-85% as I get into my office, I find, is a large change. To be frank, the battery life of the Nexus S in general isn't so fantastic to begin with... this hit makes it worse.
Anyone else?

I used to get home with about 40-50% after a whole "normal day" (unplugged at 8AM, and getting back home at ~8PM) .. now (with the same average usage) I'm getting home with ~30-40% ... that why I said "slight increase" ...

Not your imagination, I too have noticed this. I hope the next update, will fix this - as I used to get pretty good battery life (even with over 250 apps).
When I recently updated to the 2.3.6, it caused a bug of continuous reboot (every 1-3 minutes), so I had to do a hard reset - now it works fine, but I only have added back about 15 apps - and the battery life sux!

Downgrade OS' it will be ok.

This is so weird. Why is the battery life worse?

onthecouchagain said:
Sorry, yes I meant 2.3.6.
Thanks for replying Ro_explorer. Is your increased power consumption significant? Seeing 65-70% when I'm used to seeing 80-85% as I get into my office, I find, is a large change. To be frank, the battery life of the Nexus S in general isn't so fantastic to begin with... this hit makes it worse.
Anyone else?
Click to expand...
Click to collapse
You want bad battery life? Try an Evo 4g with a Sense rom. I averaged about 6hrs using a 1500mAh battery, in stock form.
The nexus is pretty light on power consumption, if you ask me. I average 15hrs on the stock 2.3.7 rom/kernel combo, with stock battery.
Sent from my Nexus S 4G using XDA App

I'm on 2.3.6 and need to charge every two days. I text a lot and do light gaming. I'm typing this from my phone. Maybe you could drain the battery and wipe battery stats? I'm not even at 50% yet and I charged yesterday.
Sent from my Nexus S using Tapatalk

I also noticed that the battery last less time
I've been waiting to see if anybody else reporting this issue

i noticed a decent increase in battery life going to 2.3.7 and thought that previously the battery life had been fairly poor :\

I am non rooted, and get around 20 hrs on light to moderate use. Again. Stock, non rooted.

How do I recalibrate my battery? I wonder if it could be that...

There are many was to recalibrate. Some involve wiping batt stats, some plugging and unplugging phone several times after charge.
I have always found that using the battery almost all the way down, but not past 5%, and then full recharge conditions it very well.

Oh I've been here to solve the problem
"Why last 2 weeks my Nexus s drain battery so fast ? or I have to calibrate it"
Thank for your notice about update OS to 2.3.6.
I think that's a root cause for me too.
1. Could I rollback to 2.3.4 ,how?
2. Does battery calibration is useful for this case , how?( someone suggest to calibrate when flashing new rom )
Thank you very much..

i want to know who have some methods to do with this stuff

borrowedchief said:
There are many was to recalibrate. Some involve wiping batt stats, some plugging and unplugging phone several times after charge.
I have always found that using the battery almost all the way down, but not past 5%, and then full recharge conditions it very well.
Click to expand...
Click to collapse
Whenever switching roms, kernels, or batteries, i always perform the following :
1. Charge to a true 100% (Battery Monitor Widget will register +0 to +2 mA)
2. Wipe battery stats using recovery (Amon RA has this option for the Evo, not sure about cwm), Battery Monitor Widget, or a dedicated app.
3. Discharge battery to 0% with normal usage. When the phone shuts down, I pull and re-install the battery and power back up (it will shutdown again very quickly).
4. Recharge battery and be on my merry way.
Sent from my Nexus S 4G using XDA App

I found one workaround solution for this issue on
ww.google.com/support/forum/p/Google+Mobile/thread?tid=1684c50cea15282a&hl=en&fid=1684c50cea15282a0004af022e5ed212
Sproogle77 's solution
Problem solved. Using the OS Monitor app, I found that the main culprit was Google Services - the Contacts sync specifically. Even though I had this disabled (only Gmail was being allowed to sync) it was constantly working, apparently trying to fix a location. The message log showed that it was generating continuous debug messages, all about locations - around 10 of these every second.
I have solved the problem by disabling 'Use wireless networks' under the Locations & Security settings.'Use GPS satellites' is still running. This immediately dropped my CPU usage - which had been running around 30 to 40% even when otherwise idle, to around 10%. Google contacts sync is now using 0% of the CPU. The difference in battery life was pretty much immediate and is now back to what it was before - the change in the slope on the battery usage graph is remarkable!
This doesn't really seem like a solution to me, and I don't know whether other aspects of my functionality are being affected, but at least my phone is properly useable again.
I'm testing for 1 day and I think that's working for me.

onthecouchagain said:
This is so weird. Why is the battery life worse?
Click to expand...
Click to collapse
One reason is that the new version of the stock kernel removed a speed stepping, so it'll power to higher levels faster, thus using more battery.

rentaric said:
One reason is that the new version of the stock kernel removed a speed stepping, so it'll power to higher levels faster, thus using more battery.
Click to expand...
Click to collapse
That actually isn't the problem. I'm using netarchy's kernel and still get this problem.
My battery life dropped from 16 hours --> 6 hours. the slope on my battery usage life is horrible the system is also awake almost constantly even when I'm not touching it / getting no messages.
I will try the fix suggested on the google support forum and see if that does the trick. sloppy update.