Database Users

Kernels on Froyo

So I get terrible battery life with .33.4 kernels (925 or 800) but got phenomenal battery on Ravens 800mv from 5/03. Are there any .33.3 kernels that will have the right drivers? How hard would it be to mod?
Thanks

Have you considered just sticking with the stock kernel? I'm getting phenomenal battery life with the stock Froyo kernel. Last I checked, i was at 46% after 28 hours unplugged (pretty heavy usage too - streaming music over 3G, several phone calls, tons of texting, youtube, web browsing)

r34p3rex said:
Have you considered just sticking with the stock kernel? I'm getting phenomenal battery life with the stock Froyo kernel. Last I checked, i was at 46% after 28 hours unplugged (pretty heavy usage too - streaming music over 3G, several phone calls, tons of texting, youtube, web browsing)
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Click to collapse
My battery is getting raped on froyo almost to the point that I want to roll back to enoms 2.1

r34p3rex said:
Have you considered just sticking with the stock kernel? I'm getting phenomenal battery life with the stock Froyo kernel. Last I checked, i was at 46% after 28 hours unplugged (pretty heavy usage too - streaming music over 3G, several phone calls, tons of texting, youtube, web browsing)
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Click to collapse
what do you do to get that much battery? my battery life isnt so good on froyo

I tried stock. Wasn't great but was better than avs.
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Sent via the XDA Tapatalk App

all kernels are going to depend on how much you play with it, and what you have running. if you don't have a load of widgets, background data, bluetooth, etc running, you should get decent battery life.
the more crap you run, the more energy it takes. common sense.

timothydonohue said:
all kernels are going to depend on how much you play with it, and what you have running. if you don't have a load of widgets, background data, bluetooth, etc running, you should get decent battery life.
the more crap you run, the more energy it takes. common sense.
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Click to collapse
This!
And I am getting pretty good battery life off the stock Froyo kernel. Actually, I am only draining at 2.2% an hour, and have had my screen on for 1hr 57 minutes, and the device off the charger for 14 hours. I have also made about 45 minutes of phone calls, and let it download with the screen off a bit.

Personally I have similar battery life to what I was getting on cm with uv/oc kernal. It does appear like it might be a little worse but I need time to be sure. Regardless I have gained small but real improvements with battery life on both cm and enom using the custom kernals and I have no reason to expect another result with froyo. Since battery life isnt exactly something I would describe as gratuitous on the N1 I will be kernaling up as soon as one looks like it actually works without issues. Right now thats not exactly the situation as I read down in development. There are a few usb mounting issues going one way and no cam going the other. Hopefully there will be a more hashed out kernal soon as the guys get more time to play with it. So getting back to the begining you ought to have something to work with shortly.

So no one will ever get the old kernels working with Froyo, huh?

If only I could find one that worked well without the USB dismount issue or the wifi issue, everything I've tried has failed. IMO 2.6.34 so far has worked best for me but has the dismount issue. I've tried four so far and none of them work well. I did get pretty proficient at moving zip files from dropbox to the sd card though.

Battery life seems to be so across the board dependent on so many variables that it sometimes seems like it's not even worth trying to gauge other people's experiences. I've tried numerous ROM/Kernal/Usage/Setting combinations and have never gotten what I'd consider to be 'good' battery life. 2.2's no exception.
I just ended up buying this 2 battery and external charger pack off of eBay for 20 bucks and admitting defeat. Our superphones are luck of the draw it seems when it comes to battery life. I'd follow someone's set up to the letter and get nowhere near the battery life they claim to get. I can turn off syncing, keep the screen dim, run a kernel that's supposed to get great battery life, and still get around 3%-5% drain per hour on standby.
My morning routine has me use bluetooth stereo headphones for about 25 minutes on the metro while I look at a couple of webpages. From out the door fully charged I'll be down to around 82% when I get into the office. To me, that's laughably terrible, but it's the only life I've ever known with my Nexus One.

halorin said:
Battery life seems to be so across the board dependent on so many variables that it sometimes seems like it's not even worth trying to gauge other people's experiences. I've tried numerous ROM/Kernal/Usage/Setting combinations and have never gotten what I'd consider to be 'good' battery life. 2.2's no exception.
I just ended up buying this 2 battery and external charger pack off of eBay for 20 bucks and admitting defeat. Our superphones are luck of the draw it seems when it comes to battery life. I'd follow someone's set up to the letter and get nowhere near the battery life they claim to get. I can turn off syncing, keep the screen dim, run a kernel that's supposed to get great battery life, and still get around 3%-5% drain per hour on standby.
My morning routine has me use bluetooth stereo headphones for about 25 minutes on the metro while I look at a couple of webpages. From out the door fully charged I'll be down to around 82% when I get into the office. To me, that's laughably terrible, but it's the only life I've ever known with my Nexus One.
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It is terrible and I was in the same boat as you. I found the kernel from 4/29 800mv and 5/03 800mv to be the big winners for me. Any other kernels and my battery drops like dead weight.

hah2110 said:
It is terrible and I was in the same boat as you. I found the kernel from 4/29 800mv and 5/03 800mv to be the big winners for me. Any other kernels and my battery drops like dead weight.
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Hm.. You're talking about Intersect's I'm assuming? How do they fair with Froyo? I'll have to try to track those down.

halorin said:
Hm.. You're talking about Intersect's I'm assuming? How do they fair with Froyo? I'll have to try to track those down.
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Ya. The two kernels I mentioned are the ones that had me going 1.5-3 days depending on usage.

In right there with you guys. I unplugged at 8am and now its 10am and I'm at 78% this is how its always been.

I downloaded the 5/03 one and I'm trying that one out now, thanks. Maybe we'll see some improvement. It sucks to lose the ability to record video for a chance at battery life on par with what I'd get on a RAZR, but that's the world we live in.

halorin said:
I downloaded the 5/03 one and I'm trying that one out now, thanks. Maybe we'll see some improvement. It sucks to lose the ability to record video for a chance at battery life on par with what I'd get on a RAZR, but that's the world we live in.
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Your RAZR doesn't have a 1ghz processor and a 3+" screen either... I'm not happy either but I'm just sayin'...

THATTON said:
Your RAZR doesn't have a 1ghz processor and a 3+" screen either... I'm not happy either but I'm just sayin'...
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True enough, but phones in the same category perform much better than ours in terms of battery life, and they never made the claim to be 'superphones'. And AMOLEDs are designed to not use a lot of juice, but HTC somehow botched that idea, from my research.

halorin said:
True enough, but phones in the same category perform much better than ours in terms of battery life, and they never made the claim to be 'superphones'. And AMOLEDs are designed to not use a lot of juice, but HTC somehow botched that idea, from my research.
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Click to collapse
I agree... Hopefully the "final" release of Froyo will have an updated kernel addressing the battery life. To be, it's not a big deal because I am always near a charger but it would be nice to be able to get through an ENTIRE day of heavy usage without worrying about the battery dying.

I havent had a smartphone recently that could didn't need to be charged every night. I would love better battery life as I jmake it through weaker usage days at about 40% moderate usage at about 25% and with heavy use I have to find a way to get plugged in to get through. Still, reading how other similar phones (large screen 1 ghz etc) are doing leads me to believe that the N1 is roughly comparable. I'm not sure how you can compare a modern smartphone to a far less power hungry (and capable) feature phone that a person almost certainly did less with over the course of a day?

[Q] Best battery life Rom?

What is the best rom for the Epic that will improve battery life? I have an Evo. My wife has an Epic. Mine will go all day and end up at 45-50%. Hers will end up at 15-20%. I know that 2.2 will make some great changes to the battery life (God I hope so), but what choices do we have now?

Epic Experience with Phoenix kernel gives me a good 14-18 hours with medium usage.

Rims don't change anything really battery related. Kernels are what effect battery life.
Also, you don't need a specific kernel to get amazing battery life. Get these apps
Spare parts
Autostarts
Juicedefender ultimate
Spare parts will tell you what is killing the battery
Autostarts will disable the drm crap on startup
Juicedefender will disable the data and wifi when not needed.
I can get 24 hours on my epic without even trying to conserve battery.

pdaddy said:
What is the best rom for the Epic that will improve battery life? I have an Evo. My wife has an Epic. Mine will go all day and end up at 45-50%. Hers will end up at 15-20%. I know that 2.2 will make some great changes to the battery life (God I hope so), but what choices do we have now?
Click to expand...
Click to collapse
Shameless plug but I am getting 16 hours with heavy use
http://forum.xda-developers.com/showthread.php?t=829650

rjmjr69 said:
Shameless plug but I am getting 16 hours with heavy use
http://forum.xda-developers.com/showthread.php?t=829650
Click to expand...
Click to collapse
define heavy use

how is the speed and performance of the epic experience and pheonix combo? im a speed freak when it comes to my phone but im as in desperate need of good battery life. any suggestions and feedback would be appreciated.
Sent through the Matrix

fromchaos0646 said:
how is the speed and performance of the epic experience and pheonix combo? im a speed freak when it comes to my phone but im as in desperate need of good battery life. any suggestions and feedback would be appreciated.
Sent through the Matrix
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Click to collapse
Speed freak and in desperate need of good battery life are polar opposites of each other. Nothing the phone does at this point needs the processor to be clocked any higher than stock and doing so is detrimental to battery life. The phone is plenty speedy using that combo. You might get the occasional hiccup in a menu for a half a second, but it is worth it for the amazing battery life, and it isn't a big deal at all.

yeah i realize they are complete opposite. im just trying to find a good balance between battery life and power. i may just have to sacrifice a little power for battery life then. i will try this combo maybe tomorrow, seeing as though i have homecoming tonight lol.

i get 60 hours + with moderate usuage. andromeda rom which includes andromeda kernal. You do not need spare parts or any task killers. 24 hours is weak battery llife. phone calls is the most extensive battery drain. if i do not make a call i can browse all day and still have 40% left.

This is how you get amazing battery performance.
I have some very VERY helpful hints of great battery life for the Epic 4g. (as i am on hour 26 to 28 and have 20% left with about 1 to 1.5 hours of screen on use.)
First off, use black, or almost black background. Our screens are superAMOLED. This means that if the screen is showing black... those particular black pixels... are simply not on. If you have the home screen black, and have no icons on it, then the status bar is all that is using power... maybe 6 or 8 percent.
Next, Lose the brightness. A few helpful hints on this. 1) uncheck the autobrightness in the display settings 2) turn the brightness down in the display settings 3) If you slide your finger from right to left across the status bar at the top, the screen will dim, if you slide your finger from left to right, it will brighten(this causes accidental brightness 4) cover this light sensor on the right side at the top (I believe) because the phone seems to have a problem always autobrighting even with the uncheck in the settings. This is done best with electrical tape, or perhaps finger nail polish. These things should ensure to always be at minimum brightness
Next, Install Frankenstein Froyo Rom(lightest rom=less cpu usage/blackest rom=less screen battery usage), And Genocide Kernel(undervolted)
Next, install task killer(keeps the rom at optimum efficiency meaning less cpu usage assuming you are killing the apps 3 or 4 times a day) install set cpu(This allows you to limit the cpu clock speed(400mhz is optimal usable and battery settings)
Things to remember, ALWAYS TURN THE SCREEN OFF.
If you pick it up every thirty seconds to see if you have a text, then just sit it down... whats happening now.. The screen is staying on for another 15 seconds probably. DUH!!! bye bye battery!!
TURN OFF THE SCREEN BEFORE YOU SIT THE PHONE DOWN!!!
Turn off gps when not in use.
Turn off wifi when not in use.
Turn off 4g when not in use
Dont use it as an mp3 player.
Dont talk on speaker phone.
Those last few were pretty obvious.. but some people need to be told.
I Hope this helps anyone looking to conserve battery. Follow these steps and i promise 24 hours plus ever time and often as much as 48 hours.
Enjoy
EDIT****
By the way, When you set yourself up with this rom, you are making your phone TWICE as fast... LITERALLY. Hard to believe that a ROM could be twice as fast.
With stock android2.1 this phone gets 800 to 900 in quadrant(benchmark tool/tell how fast your phone REALLY is) Stock android 2.2 quadrant score is a little better scoring as high as 1000.
With this setup, i have gotten as high as 1950 in quadrant. No joke. This is reflected as you cant even tell the phone is clocked down to 400mhz without heavy apps and REALLY paying attention.

Juice Defender With Ultimate Juice Benchmark!

Hey guys im in the process of doing a little experiment to see actually how much Juice Defender with Ultimate Juice actually improves the battery life on my Evo4G. I'm sure this has been done somewhere else i just couldn't find it so i decided to do the experiment myself and post my findings this may be useful to some people or may not!
Phone: Evo 4G
ROM: Cyanogen Mod 6.1.2
Kernal: Zendroid BFS @ 1.52ghz w/ smartass scaling
Launcher: Go Launcher
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Phone running Juice Defender With Ultimate Juice
Phone Unplugged At 11:42am
Phone Died At 8:59pm
Usage: For the most part it was moderate use, no gaming, 2 calls lasting for a total of aproximatly 45 minutes. 120 texts were sent and received 146 within the time frame. There was no browser usage just mostly texting like i said. 3 Pictures were taken. No Wifi. Bluetooth or 4G used either.
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Phone running without Juice Defender With Ultimate Juice
Phone Unplugged At: 2:50pm
Phone Died At: Never
Usage: Well my phone has been unplugged since 2:50pm and its now 12:35am and my battery is sitting at 55%. Weird... very weird. I had about the same usage as yesterday i played 1 game for a total of probably 10minutes and installed 4 apps. A had wifi enabled for probably an hour total.
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Final Thought: I think Juice Defender doesnt help at all, infact it seems to hurt your battery more than anything. I think it may be because its constantly turning things off and back on consuming battery? Thats the only thing i can think of. Does anyone else have any thoughts on why this is? Using Juice Defender reduced my battery life dramatically it almost cut its life in half as a matter of fact. Please share your thoughts on why this is people!

bump bump bump!!!!!

beanx said:
Hey guys im in the process of doing a little experiment to see actually how much Juice Defender with Ultimate Juice actually improves the battery life on my Evo4G. I'm sure this has been done somewhere else i just couldn't find it so i decided to do the experiment myself and post my findings this may be useful to some people or may not!
Phone: Evo 4G
ROM: Cyanogen Mod 6.1.2
Kernal: Zendroid BFS @ 1.52ghz w/ smartass scaling
Launcher: Go Launcher
-----------------------------------------------------------------------------
Phone running Juice Defender With Ultimate Juice
Phone Unplugged At 11:42am
Phone Died At 8:59pm
Usage: For the most part it was moderate use, no gaming, 2 calls lasting for a total of aproximatly 45 minutes. 120 texts were sent and received 146 within the time frame. There was no browser usage just mostly texting like i said. 3 Pictures were taken. No Wifi. Bluetooth or 4G used either.
-----------------------------------------------------------------------------
Phone running without Juice Defender With Ultimate Juice
Phone Unplugged At: 2:50pm
Phone Died At: Never
Usage: Well my phone has been unplugged since 2:50pm and its now 12:35am and my battery is sitting at 55%. Weird... very weird. I had about the same usage as yesterday i played 1 game for a total of probably 10minutes and installed 4 apps. A had wifi enabled for probably an hour total.
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Final Thought: I think Juice Defender doesnt help at all, infact it seems to hurt your battery more than anything. I think it may be because its constantly turning things off and back on consuming battery? Thats the only thing i can think of. Does anyone else have any thoughts on why this is? Using Juice Defender reduced my battery life dramatically it almost cut its life in half as a matter of fact. Please share your thoughts on why this is people!
Click to expand...
Click to collapse
thanks for the info. i try to tell people that juice defender doesn't help. but no one listens so i gave up and just tell them cool app and walk away lol.

very helpful post. I noticed too it doesnt seem to really help it just monitors mobile data and turns it off when screen is off and occasionally powers it on to download emails and ****. I dont like it because i like to kno when i get an email instantly versus it checking every 30 min.

I also found that juice defender seemed to have a negligible impact on my battery life while also decreasing speed of sync/convenience. You'll notice that it also makes android system skyrocket towards the top of the battery use list.
On a related note, I also found that setcpu profiles don't have an impact on battery life and may even hurt.
Ultimately, android is optimized to manage a lot of these things on its own and introducing an app that consumes battery both monitoring and brute forcing some of these activities doesn't make sense. The only active monitoring app I use now is Tasker for some specialized automation activities.

i cant believe this is an app that most people recommend to improve battery life tho. Especially with how much it hurts rather than helps. Very disappointing.

It has helped mine because I use the widget to manually shut it off and on. I don't let it control it. Since the epic doesn't have the shut off data in the power menu its good for me. Otherwise I agree with you all. I keep my data off until I need it to look something up. Personal preference. But hey it does shut my data off when I tell it to.
Sent from my Epic 4G
Rom: Never stock, but always with some Gingerbread.

I had been using juice defender and setcpu for a while trying to get the best battery life, but I ditched them both about a month ago and I'm getting better life than ever before lol
I've got 58% left in the battery and the phone has been up for 32 hours. I thought I was helping by micromanaging the phone with JD but I think it was really just hurting it.

deathsled said:
I've got 58% left in the battery and the phone has been up for 32 hours. I thought I was helping by micromanaging the phone with JD but I think it was really just hurting it.
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Click to collapse
32 hours up and only down to 58%? Mind if I ask how you set thigns up that your phone is so energy efficient?

It was a great application, Donut times, it literally made my Magic 32a survive the day against the not-even-a-day battery life at those times. Nowadays it is simply useless due to android better app management.

Hmmm...I have been using this for a few months now and I've seen dramatic improvement in my battery life. I usually unplug my phone at 7 each morning and by noon on moderate usage days I'm at 60%. Using JuiceDefender, my phone is typically at 80%. By 5pm with its only at %60. Normally I would get home at 5 and it would be around 30%. Interesting.
Running Samsung Captivate
Stock Android Eclair 2.1
Rooted
Zeam Launcher

With more iterations of Android they are improving power managment, Ya back a little bit ago this helped some people alittle it closing out processes and way to handle things but with android development alot of this stuff is getting worked into the OS, basically now all your doing is running a app constantley that does something handled by the OS now in newer builds.
I wonder in some cases if the juice defender and the OS both trying to do power management if it can actually cause more power loss due to a conflict in the two trying to controll items. Of course OS should have higher pid but could cause some of your increased power drain using both

try the beta

im using it on my epic and my evo i think it helps both but i am also using the free beta i dont think the regular one works

i'm shocked there's even a thread for this. i put it on a stock epic and it made a WORLD of difference.. especially in locations where my signal was poor and evdo service kept dropping. my issues with it are of a different nature. seems to get corrupt alot and the wifi locations service sucks

Hmm, i'm confused on how this could actually hurt battery life, especially by the amount you displayed unless you have it doing all kinds of other management as well. I have mine setup to only manage the data APN, disabling on screen off, and seem to have gained decent battery life from it. The widget to toggle data on/jd on/off is very handy as well.
Pretty sure android doesn't do anything natively that turns off data when phone is at rest/screen off, does it? Someone please correct me if i'm wrong.
I will admit, the new versions of JD do seem to be pretty bloated and sluggish.. i've been on the fence of whether to remove or not... The main reason i keep it on my device is because i work in a basement and get about 65% TWS and severe battery drain from that. With JD managing 3G, it helps mitigate that somewhat, and having it be automatic is much more convenient than toggling it manually all the time.
I may have to join you on some testing, because if JD is not gaining me anything, i'll definately be removing it as it sometimes causes some initial sluggishness when turning the screen on. From daily usage experiences (and i watch it like a hawk), my battery life has definately not been made worse.. older versions seemed to net me more life, and i'm undecided on the new versions. Not enough time with it on/off to decide yet.

Most Def Work
JD helps... it will slow down notifications and stuff, if you need always on data then this won't help. However, during the day I'm usually already online and don't need non-stop notifications and if you use JuicePlotter you can clearly see that while sitting idle with JuiceDefender on you use significantly less battery than if you don't have JuiceDefender active and have it sitting idle.

for those that think jd works...
are you using the free, pro, or ultimate version? looking to buy if it really saves battery life.

which configs did you use? I had it a few months ago and my battery did actually improve. Trying some different settings makes a huge improvement.
I am using superpower now. (from XDA actually) And this is really working, it also takes some configuration, but eventually it will benefit your battery life.
Superpower turns data to 2g when your screen is off, disables wifi and bluetooth and sets your cpu to a 400mhz cap (at least with my phone) I noticed a 1% overnight drain and a 200% increase in battery life. (basically I do two days with heavy use vs. one day before)
Hope this helps some people!

The only thing that actually changes the battery in an evo is a kernel. No quick fix app is going to help how your system interacts with your battery! Senseui is garbage and it sucks up battery life like no bodies business!

Pathetic Battery Life on Vibrant Trigger

SGS Vibrant flashed with Trigger 3.2 the battery lasts for 1 day with wifi usage and even if kept for overnight it drains about 18-20% of battery should i move to a different ROM ?

You could
Sent from a cell tower to the XDA server to you.

Trigger has had one of the best all time battery life for me a everytime.
I think you need to
A) recalibrate
B) re-check to see if any apps are using battery life.
C) flash a rom if none of that works.

Here we go again for the millionth time.....

But for me trigger had the best battery life.
I'm not on the gingerbread roms and it takes me from 100% to 5% in 8 hours overnight even WITH Juicedefender (seems to be about the same without it also).
If anyone has tips on THAT, I would much appreciate it. I've tried calibrating the battery.

There is a setting that you can turn your radios of from x time to x time overnight. I have mine set for 11-6. If I am on after 11, then I take priority. If not then the setting does.
There is also a setting that will open data/radio every 15m/30m/45m/1h/2h or something like that to get updates for somethings (i.e. Beautiful Widgets). I have mine set at 2h. If I want my data/radio open I will do it myself, hence my long interval.
Been using this app for well over a year so I know how to tweak it a bunch. If you have JD+ see my battery guide and it will tell you more about its tweakiness.

Trust me. This guy knows how to use JD, check out his battery guide. It will be worth your time.
Sent from my SGH-T959 (Samsung Vibrant)

i wish i could get my phone to last a whole day without charging, i just dont complain because i know for a FACT that the reason my phone only lasts 10-12 hours is because of ME. im too stubborn and refuse to switch to battery-friendly usage. the biggest thing that impacts battery is the user/user apps. not rom, not kernel, the battery difference from rom-to-rom and kernl-to-kernel is barely noticeable (unless in the rare case where there is a bug, or developmental defect). if there was ACTUALLY a rom in exsistence that TRULY had superior battery life, then you wouldnt get 5-10 different answers in every single "what is best rom/kernel for battery" thread.
the problem is, people want to believe that they can save battery without changing their usage habits. this simply is not possible. no rom or kernel will realistically do this for you. if you remove 1 brick from a bag full of 15 bricks, the bag will be lighter, but still very heavy. you need to download "spare parts" or "process monitor" from the market and start analyzing the way your apps are acting. also look into data syncs that are happening in the background. apps that stay open behind your back/what they are doing, (an app called "autostarts" can prevent apps from self-running under certain scenarios). animation speed. polling for notifications. gps. wifi scans. overclocking. cpu/ram usage. proper sleep. widgets. brightness. 2g/3g. data usage. call time. text volume. - THESE are the things that really affect your battery life.
bottom line is, if you truly want to save battery you are going to have to get your hands dirty...there simply isnt a one-click (or one-flash) solution.

Hmm so i'm now on MIUI and it seems to be giving better battery life, also have been thinking of getting the extended battery for Vibrant is it worth ?

If it sucks so bad, grab one of these. I have it and it has given me at least a 20% increase in battery life. BTW, you must listen to the instruction for the Battery if you get it. 4 or 5 full Drains to 0% and then charge to 100% while device is powered off and re-calibrate after each of these full charge cycles.
http://www.amazon.com/Anker-1800mAh...TNYE/ref=sr_1_3?ie=UTF8&qid=1325868638&sr=8-3

switch to Neo's ICS .
it rocks

Cellanos said:
switch to Neo's ICS .
it rocks
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Click to collapse
But the gps doesn't work on it correct?

What about the extended battery which is around 3500Mah

I just got the 1800 mah batteries for the Epic 4g. They fit in the vibrant like a glove and my battery life has been significantly lengthened.
Sent from my SGH-T959 using XDA App

Winning
dinjo_jo said:
Hmm so i'm now on MIUI and it seems to be giving better battery life, also have been thinking of getting the extended battery for Vibrant is it worth ?
Click to expand...
Click to collapse
sent from my Sensation XD

How to get 36 hours on 1 charge

Alright, so I'm not a very heavy user on the phone but I've started getting 36 hours of use on my phone. I was blown the hell away! I usually would get a Max of up to 25 or 26 hours or so before this. Even then a full 10 hours extra is magnificent!
Here's what I've got going on:
Running MIUI 2.3.23 ROM with Bulletproof Add On pack
Using Tiamat 1.1.5 kernel
Juice Defender Plus on Advanced mode
Recaibrated my batter with Battery Callibrator app
Overclocking at 1039 MHz and underclocking at 184 mhz using SetCPU
After calibrating my battery I let the battery run out completely a couple of times and voila!
I took a screenshot of my usage statistics but I can't find the damn thing now. I guess you're just got to trust me on this. This was definitely worth sharing.
All the best!
Sent from my HTC Desire Z using XDA

How many hours of screen on time did you have at the end of that charge? The longest battery life i've ever had for my phone was actually 3 days and 3 hours with 5 hours of screen on time. I'm a light to moderate user and i achieved that result with CM7.2 RC1 without any tweaks.
I really like the look of MIUI but i don't find it to be as fast as it really should be. I get frustrated by the scrolling lag that is present in the settings menu and the fact that video playback is much slower in comparison to other ROMs. Web pages were also always SO much more laggy in MIUI for me than on Sense or AOSP based ROMs. That's my personal experience, i think i've just about given up on MIUI and Sense based ROMs. I haven't touched either of those for a while now.

I get 36 hours normally with the stock Sense 2.1 ROM and Unity V10 kernel. Overclocked to 1Ghz with the standard governor.
I use it quite lightly though, 10 to 20 SMS, bit of internet / Facebook and 30 mins FM radio in the morning. Also accounts sync automatically, mail picked up every hour, data always on. That was with the stock battery, with the Anker 1600 mah I get to 36 hours with about 30% to spare!
On a side note, underclocking below 245Mhz has been know to cause problems. Standby of Death (or Sleep of Death), and possibly dropped SMS etc.
Craig

craiglay said:
I get 36 hours normally with the stock Sense 2.1 ROM and Unity V10 kernel. Overclocked to 1Ghz with the standard governor.
I use it quite lightly though, 10 to 20 SMS, bit of internet / Facebook and 30 mins FM radio in the morning. Also accounts sync automatically, mail picked up every hour, data always on. That was with the stock battery, with the Anker 1600 mah I get to 36 hours with about 30% to spare!
On a side note, underclocking below 245Mhz has been know to cause problems. Standby of Death, and possibly dropped SMS etc.
Craig
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*sleep of death or SOD... i think S is for sleep not standby...
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i didn't mean to flame you, nor to mock you in any kind of way

thats quite insane @[email protected];;
i get about 13~15 hours of charge each time @[email protected];;
i use my phone mainly for texting and emails
no games on the phone...
i should give that a try, thats quiet insane ;o

lil-devil said:
thats quiet insane @[email protected];;
i get about 13~15 hours of charge each time @[email protected];;
i use my phone mainly for texting and emails
no games on the phone...
i should give that a try, thats quiet insane ;o
Click to expand...
Click to collapse
Hehe the word you're looking for is "quite" and not "quiet(as in low sound)".

Ace42 said:
Hehe the word you're looking for is "quite" and not "quiet(as in low sound)".
Click to expand...
Click to collapse
woops typo

magic_android said:
How many hours of screen on time did you have at the end of that charge? The longest battery life i've ever had for my phone was actually 3 days and 3 hours with 5 hours of screen on time. I'm a light to moderate user and i achieved that result with CM7.2 RC1 without any tweaks.
I really like the look of MIUI but i don't find it to be as fast as it really should be. I get frustrated by the scrolling lag that is present in the settings menu and the fact that video playback is much slower in comparison to other ROMs. Web pages were also always SO much more laggy in MIUI for me than on Sense or AOSP based ROMs. That's my personal experience, i think i've just about given up on MIUI and Sense based ROMs. I haven't touched either of those for a while now.
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Click to collapse
I'm not sure how much screen on time I had. I'll give it a check next time I'm monitoring my performance.
Sense UI has been a pain for me from the moment I started. I tried CM 7 but it had a bug where it wouldn't vibrate when I got a message unless it was in silent mode. Since I SMS quite a bit, it was quite annoying. I tried a couple of Virtuous ROMs too but they were glacial in their speed. Couldn't stand the lag.
I find MIUI to be the perfect balance between features, UI and speed. It might be a tad laggy in some places, but on the whole, it looks great, works great and doesn't give me problems in the parts I use the most. It doesn't seem quite as laggy with me as you seem to describe it. But anyhoo, for the first time since I bought my DZ, I feel like I have a good phone that I can rely on.
Thanks for your comments, man.

craiglay said:
I get 36 hours normally with the stock Sense 2.1 ROM and Unity V10 kernel. Overclocked to 1Ghz with the standard governor.
I use it quite lightly though, 10 to 20 SMS, bit of internet / Facebook and 30 mins FM radio in the morning. Also accounts sync automatically, mail picked up every hour, data always on. That was with the stock battery, with the Anker 1600 mah I get to 36 hours with about 30% to spare!
On a side note, underclocking below 245Mhz has been know to cause problems. Standby of Death, and possibly dropped SMS etc.
Craig
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WOw! Really? Stock giving 36 hours! That's pretty sweet man. Never happened to me.
And thanks for the advice on the underclocking. Maybe I should up it a notch, just in case.

lil-devil said:
thats quite insane @[email protected];;
i get about 13~15 hours of charge each time @[email protected];;
i use my phone mainly for texting and emails
no games on the phone...
i should give that a try, thats quiet insane ;o
Click to expand...
Click to collapse
Go for it bro! And let me know if it works for you.
Right now, I've already hit 33.5 hours and have just hit 15% battery. And this is including a few games of Angry Birds. woohoo!

lunarplexus said:
After calibrating my battery I let the battery run out completely a couple of times and voila!
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Click to collapse
Letting the battery drain to shutdown is not a good idea. Not good for long term life of Li ion batteries. Also, its unlikely, but possible that draining to shutdown will render the battery unable to take a charge. Fail safes on the device and battery are supposed to prevent this in theory, but in reality they don't always work. Several reports on this device of people that drained to shutdown, and then couldn't charge their battery.
The battery meter is not accurate enough to necessitate draining to zero. Just drain to 10 or even 20%, charge to full, repeat a couple times. No value added whatsoever to draining to shutdown.
I have easily gotten 48 hours+ with light usage on various ROMs, including ILWT and Virtuous Unity (which is Sense 3, and claimed by some to be a "battery hog"). This is with Bluetooth and WiFi always on, and no special battery calibration or battery saving apps.. So many things affect battery life. But my personal hunch is that the ROM, clocking, radio, and data reception in your area (and of course usage) have more to do with battery life than other factors. And with radio and reception being the really big drivers.

That's definitely very helpful. I've always heard that rechargeable batteries are supposed to be drained completely and charged at least periodically to extend its life. Your proposition is contrary to this belief but then, I don't know that much about the battery and those aspects of the device itself to be able to refute what you're saying. Best to be on the safe side though.
Current record for my battery is 42 hours as of today. I'm pretty thrilled. My device was giving at least 10-15 hours less before I made these customisations. So I feel it probably has helped. However, there are a lot of factors at play, as you said.
Thanks for the response!

lunarplexus said:
That's definitely very helpful. I've always heard that rechargeable batteries are supposed to be drained completely and charged at least periodically to extend its life. Your proposition is contrary to this belief but then, I don't know that much about the battery and those aspects of the device itself to be able to refute what you're saying. Best to be on the safe side though.
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Click to collapse
There are various types of rechargeable batteries with very different behaviors. What you mention is known as battery conditioning, where you periodically drain to (nearly) empty and charge to full, and is recommended for older type NiCd (nickel cadmium) batteries. This is to avoid "memory effect" where the battery will remember how much was discharged in past cycles, and not deliver any more than demanded before. Kind of a "use it or lose it" principle.
Lithium (Li) ion cells (the type on most smartphones) do not suffer from memory effect. And full discharge cycles actually hurt the long term life of the battery. Charging frequently is actually the best for this type of bettery. But a couple nearly full cycles are needed to properly calibrate the battery meter on the phone.
If you want to educate yourself on the Dos and Don'ts of batteries, this website is a good one:
http://batteryuniversity.com/