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JuiceDefender, Tasker, SetCPU + CM7: Battery Results

My phone's been running for 16 hours and 20 minutes on one charge, and the battery is at 59%. Not entirely sure if this is impressive or not, but I figured I'd share my settings. I'm on CM7 Nightly from the 13th.
JuiceDefender v3.4 Beta
Controls
Mobile Data - Enabled
Options - Prefer Wifi
WiFi - Enabled
3G - Off
Options - disable on wifi
Disable timeout - 5m
AutoSynch - ping
GPS - disabled
Everything else is left off​Schedules
Schedule - Enabled
Frequency - 1hr
Duration - 30s
Controls - Default
Night - Enabled
Start 12am - End 6am
Options - Silent
Schedule (weekend) - Enabled
Frequency - 30m
Duration - 1m
Night Weekend
Start 2am - End 8am​Triggers
Battery - Enabled
Battery Threshold - 35%
Charger AC
Screen - Enabled
Options - After Unlock
Controls - Default
Traffic - Enabled
Traffic Threshold - low
Apps - Enabled
Controls - Default
Location - Enabled​
SetCPU
Main
Max: 1017600 Min:245760​Profiles
Screen Off: 245 Max 245 Min Priority 100 Ondemand
Charging: 1017 Max 245 Min Priority 99 Performance
Battery <5% Max 368 Min 245 Min Priority 52 Conservative
Battery <50% Max 768 Min 245 Priority 50 Ondemand​
Tasker
Profile to manage Turning Bluetooth off from 8:30-16:30 M-F, Exit Case turns bluetooth back on
Profile to manage Turning Bluetooth off from 17:30-7:30 M-F Exit Case turns bluetooth back on.
Profile to manage brightness: Level 0, Auto Brightness off from 00:00 to 08:00 Exit Case restores Auto Brightness​

Very good info. I been holding off for to battery life. I might have to go visit the store tomorrow.
Sent from my Nexus One using XDA App

I like the SetCPU settings, I have never messed with the profiles before but that looks like a good idea.
I will see how this goes first then maybe try JD.

Over night my phone finally got down to 1%. Topped out at 31 hours 20 minutes or so.

Jeffsmashkot said:
Over night my phone finally got down to 1%. Topped out at 31 hours 20 minutes or so.
Click to expand...
Click to collapse
I'm monitoring with Current Widget and i'm noticing that my phone is deep sleeping and pulling down to as low as 1mA sometimes! I usually get about 24hrs or so, but I just applied some different setcpu profiles.
I also use Tasker to shut off mobile data in the middle of the night, then turn back on in the morning. I think it's pointless to leave it on and waste battery life while I'm sleeping.

Im going to try out Juice Defender. I had itw ith my Aria and it does work very well at saving battery life BUT on that phone it would cause some lag when switching networks on/off etc. On this phone hopefully it's fast enough to not notice the lagginess when switching networks.

I just did some major testing of the inspire power draw, and you guys are lucky. Compared to my nexus one, it is super efficient. The highest with screen on and pushing the phone hard, current would max at 400mA at max brightness. At 50% brightness current was steady at 230mA no matter what.
In comparison, my nexus one spikes to 700mA when showing white web pages, and around 180mA showing black. These spikes aren't good and no wonder nexus gets crap battery life.
I can see why they under spec the inspire battery, but I wish they didn't.

I'm going to try out your settings for a few days and see how it goes. Thanks.

Would you mind sharing the link for the juice defender. I've downloaded the newest beta and it says it cannot disable the cellular radio because it is not fully supported. Note I did flash it using the kernel with the battery fix posted on the forums. Do you think that could be the problem?

I just use SetCPU profiles and JuiceDefender in default mode. Immediate difference in battery life.
For testing purposes of CM7, I would leave my phone off the charger to see if the battery fix was working. Normally it would drop 15-20 percent sometimes more. With the SetCPU and Juice Defender, Just dropped 8 percent. WOOT!

hack2009 said:
Would you mind sharing the link for the juice defender. I've downloaded the newest beta and it says it cannot disable the cellular radio because it is not fully supported. Note I did flash it using the kernel with the battery fix posted on the forums. Do you think that could be the problem?
Click to expand...
Click to collapse
In order to get the latest beta, you have to register on the forum to be part of the beta group.

I'm on Revolution 3.3. The current widget doesn't work. It doens't show anything. Any ideas?

[Q] How Do You Improve The Battery On V4 Rom?

How Do You Improve The Battery On V4 Rom?
Thanks for the help

Post a little about your setup:
- apps installed that run constantly (i.e. K9 mail, Wifi searching, etc)
- overclock values (if any)
- list your normal usage rates (rarely on the internet, playing music all the time, phone & mail only, etc.)
There are various ways to improve the battery life like SetCPU where you can slow the CPU down when it's not needed. Also, turn off your data when sleeping. Lot's of ways....need info first.

banshee56 said:
Post a little about your setup:
- apps installed that run constantly (i.e. K9 mail, Wifi searching, etc)
- overclock values (if any)
- list your normal usage rates (rarely on the internet, playing music all the time, phone & mail only, etc.)
There are various ways to improve the battery life like SetCPU where you can slow the CPU down when it's not needed. Also, turn off your data when sleeping. Lot's of ways....need info first.
Click to expand...
Click to collapse
1. stock apps really ,
2. 1GHZ
3. internet used every 10 mins, dont play music, just stuff general

2G or 3G more? Wifi?
OK, what kind of battery life do you get?

battery
Follow the usual stuff. use 2g instead of 3g. disable WiFi when not in use. Additionally you can use your Milestone Overclock (included in ROM) to lower the maximum frequency of the chip. I use 1Ghz at 60 vsel. thats a bit overclocked but my battery life is fine. Anyways try that and see if it improves

sebastimau said:
Follow the usual stuff. use 2g instead of 3g. disable WiFi when not in use. Additionally you can use your Milestone Overclock (included in ROM) to lower the maximum frequency of the chip. I use 1Ghz at 60 vsel. thats a bit overclocked but my battery life is fine. Anyways try that and see if it improves
Click to expand...
Click to collapse
thank you so much my vsel is 64 and now my battery lasts ages thank you
btw what does vsel mean?

vsel means voltage
btw I've learnt a vital way of saving juice from my local forum. use setcpu and set a profile for "screen off". put the cpu speed to 250max, priority 100, powersaver.
this successfully reduced my batt consumption by at least 50% as I am a light user and the phone is idle most of the time. now it lasts me through 2 days on a charge

[DEV] Power Management

Hi devs
I found something interesting about Android power management..maybe it will help us
http://developer.android.com/reference/android/os/PowerManager.html
http://www.netmite.com/android/mydr...s/power_management.html#androidPowerWakeLocks
and here is a app for users http://forum.xda-developers.com/showthread.php?t=1179809

I found some more things for power management
devs check pls
Enabling system for hitting OFF
#echo 1 > /debug/pm_debug/enable_off_mode
By default sleep_while_idle is set to false and enable_off_mode is set to true
CPU Dynamic Voltage Frequency Scaling settings
Enabling ondemand frequency governor
The ondemand governor enables DVFS(frequency/OPP) transitions based on CPU load.
#echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Enabling performance frequency governor
The performance governor keeps the CPU always at the highest frequency.
#echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Enabling powersave frequency governor
The powersave governor keeps the CPU always at the lowest frequency.
#echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Enabling userspace frequency governor
Once this governor is enabled, DVFS( frequency) transitions will be manually triggered by a userspace application by using the CPUfreq sysfs interface
#echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
See all the available operating points
#cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
Application can select any of the available frequency from the above
#echo <Desired Frequancy> > /sys/devices/system/cpu/cpu0/cpufreq/ scaling_setspeed
Checking CPU IDLE states usage
There are seven power states introduced by CPU Idle
The usage and time count for these different states can be checked via
#cat /sys/devices/system/cpu/cpu0/cpuidle/state*/time
#cat /sys/devices/system/cpu/cpu0/cpuidle/state*/usage
Enabling system for hitting OFF
#echo 1 > /debug/pm_debug/enable_off_mode
By default sleep_while_idle is set to false and enable_off_mode is set to true
CPU Dynamic Voltage Frequency Scaling settings
Enabling ondemand frequency governor
The ondemand governor enables DVFS(frequency/OPP) transitions based on CPU load.
#echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Enabling performance frequency governor
The performance governor keeps the CPU always at the highest frequency.
#echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Enabling powersave frequency governor
The powersave governor keeps the CPU always at the lowest frequency.
#echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Enabling userspace frequency governor
Once this governor is enabled, DVFS( frequency) transitions will be manually triggered by a userspace application by using the CPUfreq sysfs interface
#echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
See all the available operating points
#cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
Application can select any of the available frequency from the above
#echo <Desired Frequancy> > /sys/devices/system/cpu/cpu0/cpufreq/ scaling_setspeed
Checking CPU IDLE states usage
There are seven power states introduced by CPU Idle
The usage and time count for these different states can be checked via
#cat /sys/devices/system/cpu/cpu0/cpuidle/state*/time
#cat /sys/devices/system/cpu/cpu0/cpuidle/state*/usage
source: http://processors.wiki.ti.com/index.php/Android_Devkit_Power_Management_Porting_Guide
this is very interesting also:
Saving battery time for mobile devices has been a goal for the industry for many years. With the
advent of smartphones, reduction of energy consumption is even more important since they
consume a lot more energy than the generation of mobile phones before them. Consumers are
demanding longer battery life and greener electronics. One way to meet these demands is to
reduce energy consumption.
In order to make the mobile operating system utilize the Central Processing Unit (CPU) more
efficiently, applications should have different reservations based on how much they need to use
the CPU. A challenge the industry is facing is its lack of knowledge of the behavior of third
party applications. Especially since they are an increasing portion of the applications run on
smartphones. Without knowledge of how third party applications behave, it is hard to make
good reservations for them. If there was a way to dynamically make reservations for the
applications with adequate performance while they are running, the system could use this
information to reduce battery consumption by e.g. clocking down the CPU when a high clock
frequency is not needed. In this master thesis project, an open source resource manager called
ACTORS Resource Manager (ACTORS RM) [5][6] for desktop Linux [57] is ported to the
Android [37] operating system. The resource manager is also optimized for the applications
being run there. A power management patch to the Linux kernel was also used to get greater
control over the CPU’s frequency changes.
source: https://rapidshare.com/files/3398178110/Resource_reservation_and_power_management_in_Android.pdf

let's spy on HD2 kernel ?
feature:
AB: Audio Boost
AXI: AXI frequency tweak
BFQ: BFQ IO scheduler (default CFS)
BFS: BFS cpu scheduler (default CFS)
HAVS: Hybrid Adaptive Voltage Scaling (Static Voltage Scaling - SVS is default)
OC: OverClock
UV: UnderVolt
OC, UV and AXI features are the standard feature for EVO based kernel.
EBAT: Extended battery
http://forum.xda-developers.com/showthread.php?t=777921
Edit: after some more research i found out that we are in BIG $h|t,until the f**** HTC will unlock the bootloader and/or update Radio for us
What REALLY improves Android battery life on the HD2
So after all that rambling, the answer is: radio ROM version. When I installed Android, I installed the latest radio ROM available at the time (still the latest I think); i.e. 2.15.50.14, from http://forum.xda-developers.com/showthread.php?t=611787. After pulling my hair out trying all the above, I flashed the radio ROM with 2.12.50.02_2, and as if by magic, current draw under similar conditions to above is about 7mW; i.e. 10% of what it was, and an overnight period as above goes from 100% to 96%. Much better
source:http://forum.xda-developers.com/showpost.php?p=13397376&postcount=1
currently our phones use 150-200 mA (even in standby,and with setCPU on :O)...measured with Current Widget available on Market.
Edit2: Another thing that REALLY improves Android battery life on the HD2 is dumping your girlfriend.
Before, I needed to charge it almost twice a day. Lots of calls and messages.
Now, I can easily get two days of standby. LOL

The radio version on hd2 is a bit tricky. Its very different from people to people. Some people say that its related to your region too.
I dont know if its the same on HD Mini.
But some people here say the dont have battery drain. It would be nice to know what radio version they use and at what region they are.

tzacapaca said:
currently our phones use 150-200 mA (even in standby,and with setCPU on :O)...measured with Current Widget available on Market.
Click to expand...
Click to collapse
But if turn off wifi, gps and phone, consumption almost does not decrease.
Maybe this consumption of sdcard, because its slot is always hot.

ROM-Version (Vodafone)Switzerland German: 1.41.166.1, (10904) Radio:0.63.05.41
Strong battery drain is only after the first boot. after the third boot is the battery drain same as in wi-mo.. same experience with cm6(derefas) ,134++(schlund)

i don't really agree.
under android, the maximum we can expect is to get as much battery life as under winmo.
today, the phone consume too much battery when on sleep, because something prevents it to go sleep.
schlund has a fix for this battery drain, I tested it, it is really efficient.
it will be released in next release, be patient ;-)
regarding the android apps that tells you how much current you have:
it wont work if the phone is really sleeping, because all the apps would be put on sleep.
so you will never know how much your phone consumes when on sleep ;-)

I should say: after the third boot is the battery drain almost the same as in wi-mo , but the truth is that there is a big difference between the first and third boot in battery drain.
New battery Fix, I'm glad to hear.
I understand that it takes time to create something, I have patience but I think it is unfair to announce a new release for the end of the week and then change mind and do not give any explanation. I hope you'll accept this criticism. Thank you

codiak said:
The radio version on hd2 is a bit tricky. Its very different from people to people. Some people say that its related to your region too.
I dont know if its the same on HD Mini.
But some people here say the dont have battery drain. It would be nice to know what radio version they use and at what region they are.
Click to expand...
Click to collapse
well,telling region and radio version won't help with anything,I will not move from my city to get better signal and HTC won't make a new radio only for me too
btw,it's impossible to don't have battery drain when phone use 200mA
i guess people were talking about CM6 of derefas,but his version is based on r146 kernel,which still has battery issues...
p.s. since u own a HD2 also do u mind to test for me with Current Widget and tell me the values in standby and on?I read some guys had 6-7 mA in standby and i think around 60 while it was on

DmK75 said:
But if turn off wifi, gps and phone, consumption almost does not decrease.
Maybe this consumption of sdcard, because its slot is always hot.
Click to expand...
Click to collapse
i'm not an expert but i really think it's impossible sdcard will use 150-200mA,if it was so then we will have 5-6 hours battery life in WM
Edit: after little research i found this ->
Metric NAND SD
Idle (mW) 0.4 1.4
Read
throughput (MiB/s) 4:85 2:36
efficiency (MiB/J) 65.0 31.0
Write
throughput (KiB/s) 927:1 298:1
efficiency (MiB/J) 10.0 5.2
so SD cards use around 1,4 mW when idle and 2,36 mW when read from it(our case)
and to convert mW to mA-> http://www.ehow.com/how_8627497_convert-mw-ma.html
source: http://www.usenix.org/events/usenix10/tech/full_papers/Carroll.pdf

-r0bin- said:
i don't really agree.
under android, the maximum we can expect is to get as much battery life as under winmo.
today, the phone consume too much battery when on sleep, because something prevents it to go sleep.
schlund has a fix for this battery drain, I tested it, it is really efficient.
it will be released in next release, be patient ;-)
regarding the android apps that tells you how much current you have:
it wont work if the phone is really sleeping, because all the apps would be put on sleep.
so you will never know how much your phone consumes when on sleep ;-)
Click to expand...
Click to collapse
i'm not really agree with u too
Current Widget runs as a process,and processes are on even if Android is in suspended,no?for ex clock,alarm,etc

15MA1L said:
ROM-Version (Vodafone)Switzerland German: 1.41.166.1, (10904) Radio:0.63.05.41
Strong battery drain is only after the first boot. after the third boot is the battery drain same as in wi-mo.. same experience with cm6(derefas) ,134++(schlund)
Click to expand...
Click to collapse
lol I think that's placebo or else why would number of boots/reboots will improve the battery life?

tzacapaca said:
well,telling region and radio version won't help with anything,I will not move from my city to get better signal and HTC won't make a new radio only for me too
btw,it's impossible to don't have battery drain when phone use 200mA
i guess people were talking about CM6 of derefas,but his version is based on r146 kernel,which still has battery issues...
p.s. since u own a HD2 also do u mind to test for me with Current Widget and tell me the values in standby and on?I read some guys had 6-7 mA in standby and i think around 60 while it was on
Click to expand...
Click to collapse
I get about 3-7 mA with all on (GPS, BT, 3G etc). Sometimes there are peaks to around 60 mA that are related to mailcheck etc. Its roundabout 1-2% per Hour what is fine to me

codiak said:
I get about 3-7 mA with all on (GPS, BT, 3G etc). Sometimes there are peaks to around 60 mA that are related to mailcheck etc. Its roundabout 1-2% per Hour what is fine to me
Click to expand...
Click to collapse
u see?
this is what i'm talking about,u can't compare 3-7 mA to 150-200 mA..so i can't understand guys who said they have power usage same as on WM...
btw,that was in suspend or while display was on?

Thats with display off. When using it the value is very variable depending on what you are doing. From ~120 to ~350 mA.

tzacapaca said:
u see?
this is what i'm talking about,u can't compare 3-7 mA to 150-200 mA..so i can't understand guys who said they have power usage same as on WM...
btw,that was in suspend or while display was on?
Click to expand...
Click to collapse
lol ok
i read somewhere that the sdcard was using 10 to 50mA max, i dont think it uses so much. maybe someone using HD2 with Haret (on sdcard) could lighten us?
which application are they using to get those values, and how to read those values if screen is off?

codiak said:
Thats with display off. When using it the value is very variable depending on what you are doing. From ~120 to ~350 mA.
Click to expand...
Click to collapse
ok,thanks
what about when with display on and doing nothing?

I used an SD build on my HD2 before using the NAND Rom. The values where nearly the same. So I dont think sdcard has a big impact on battery.
I use this App from the Market. It logs to a file and you can view the history

tzacapaca said:
what about when with display on and doing nothing?
Click to expand...
Click to collapse
Then its around 120 mA.
But remember, HD2 has a BIG display

I don`t know, maybe it will be usefull for developers. I tested CM6 r146 releace from derefas.
All night in sleep mode it takes 10-15% of accum. Then I use it for maybe 4-5 hours, and android said that charge is needed (it was near 15%). Putting on charge, don`t bring any result, I wait for half an hour, no persets where moving.
Then I reboot the device i n WinMo and it shows me 70%, after it i use winmo for 2 days without charging...
It seems to me that the problem is with indicator... in my situation there was a good accum, but android don`t see it...
P.S. Sorry, if i am talking silly things

[Q] Suggestions for MIUI battery life

I love these ports but battery life has been poor to average at best with normal use. (8-10 on MikeyMikes about 11-13 on Boosts respectively ) Here are all adjustments so far
- running at 100-1.2mhz on conservative
- UV at -100 across the board
- underclocked at 800 when screens off, in call , and less then 50%
- Thunderbolt scripts added
- auto brightness and power saver mode turned off, set at about 20%, Black wallpaper
- Background sync, Google backup, and email sync turned off
Anymore suggestions that have worked out for other users?

You're doing all the right things.
You could try undervolting a little more I can get mine to about -220mV across the board)
You can try disabling notifications in Market
You can try disabling notifications in calendar
If you use beautiful widgets or something similar you can adjust the refresh rate of the weather
Make sure notifications for facebook and twitter are off
That's all I can think of off the top of my head

ns4smi said:
I love these ports but battery life has been poor to average at best with normal use. (8-10 on MikeyMikes about 11-13 on Boosts respectively ) Here are all adjustments so far
- running at 100-1.2mhz on conservative
- UV at -100 across the board
- underclocked at 800 when screens off, in call , and less then 50%
- Thunderbolt scripts added
- auto brightness and power saver mode turned off, set at about 20%, Black wallpaper
- Background sync, Google backup, and email sync turned off
Anymore suggestions that have worked out for other users?
Click to expand...
Click to collapse
I am also running boosted MIUI,
~running 100-1200mhz conservative and 100-800mhz conservative when screen is off.
~I only undervolted -50mv @ 100mhz, -50mv @ 200mhz, -25mv @ 400mhz, and -25mv @ 800mhz.
~NO thunderbolt script added, it says on the boosted MIUI that it already has battery performance tweaks
~I have background sync, Google and email and Facebook all set to the longest interval to sync
~automatic brightness enabled
~never really use WIFI, never use GPS (I cant even get a lock anyway, accurate to 2000 meters does me no good, haha)
Under normal use (texting throughout the day, playing games for 30 min to an hour, and browsing the internet for an hour or two, and maybe a few short phone calls) I can easily get 18 hours.
I have gotten 48 hours out of the phone, but the screen was off most of the time and I only text messaged during that time.
Under heavy use (playing GTA or watching movies) I get about 8 hours or so.
Have you tried draining the battery completely and then letting it do a full charge?
Before "boosted MIUI" I could barely get half a day out of the phone... it's nice only charging the phone every other day, and not having to carry a charger wherever I go. Boosted has by far, given me the best battery life.
Also... what kernel and modem are you running?
I'm using CWM Community Kernel, and UCKL2 modem, I do believe the modem has something to do with battery life... and how long it takes to charge... I think... it seems to me it charges fastest with the UCKL2 modem... I have tried every other modem.

ns4smi said:
I love these ports but battery life has been poor to average at best with normal use. (8-10 on MikeyMikes about 11-13 on Boosts respectively ) Here are all adjustments so far
- running at 100-1.2mhz on conservative
- UV at -100 across the board
- underclocked at 800 when screens off, in call , and less then 50%
- Thunderbolt scripts added
- auto brightness and power saver mode turned off, set at about 20%, Black wallpaper
- Background sync, Google backup, and email sync turned off
Anymore suggestions that have worked out for other users?
Click to expand...
Click to collapse
Try Zeus
Sent from my A500 using Tapatalk

Thanks will try
Miui Infuse

ns4smi said:
Thanks will try
Miui Infuse
Click to expand...
Click to collapse
Yeah, no problem. You will like.

Great battery life!!!

After doing every possible combinations of ROMs and kernels and everything else under the son I have found the recipe for longer battery life and awesome performance all you need is the Deep Sleep Battery saver Greenify app and Go Power Master Hibernate all your apps then go to Go Power Master and make Greenify and Deep Sleep battery saver whitlisted apps schedule it the way you want Deep sleep battery saver that is as too what apps to sync so often or whatever and example I am used to running my phone dead four or five times a day I charged my phone once in two days when I used this combination so forget all those setting your processor to all these different speeds and profiles just use this and you will see the difference BIG difference unless your over clocked to 1.5 GHz or something even charging the phone and talking on it your battery barely drops this is one hell of a combination took a looooot of time to figure this or but works like a charm
sent from WMD SAMSUNG GALAXY S2

DBDMagic said:
After doing every possible combinations of ROMs and kernels and everything else under the son I have found the recipe for longer battery life and awesome performance all you need is the Deep Sleep Battery saver Greenify app and Go Power Master Hibernate all your apps then go to Go Power Master and make Greenify and Deep Sleep battery saver whitlisted apps schedule it the way you want Deep sleep battery saver that is as too what apps to sync so often or whatever and example I am used to running my phone dead four or five times a day I charged my phone once in two days when I used this combination so forget all those setting your processor to all these different speeds and profiles just use this and you will see the difference BIG difference unless your over clocked to 1.5 GHz or something even charging the phone and talking on it your battery barely drops this is one hell of a combination took a looooot of time to figure this or but works like a charm
sent from WMD SAMSUNG GALAXY S2
Click to expand...
Click to collapse
dude, use punctuation

mjz2cool said:
dude, use punctuation
Click to expand...
Click to collapse
+1 :good: Why do people write that way?

mjz2cool said:
dude, use punctuation
Click to expand...
Click to collapse
+1 also
If you have Deep Sleep problems, that Deep Sleep Battery really helps, but just turn it off (or freeze it) after waking your phone, since it still runs on background while you're using your phones, and consume some RAM, which we don't wanna...
Go Power Master, hmm... That "Optimization" thing just means "Clear Memory" (Background Memory). So if you have Task Managers who have that function, you can ditch GPM with your own Task Manager, less Apps installed
Greenify. The best so far. Cancels-out stupid background apps that persists (much better with the new version, GSF bye-bye! ). I only stay at my unstable 4.0 ROM for this baby (and also Xposed). If Greenify can be incorp'ed with GB firmwares, that would br awesome, which is not possible...
Additional tips:
• Lessen RAM usage (meaning close other running apps, foreground or background), to lessen CPU pressure.
• "Top-Off" your charging time. Do an extra 15-20 minute charge after 100% charging. If "fills up" the mV capacity , for the best full-battery experience
• If your phone can, Underclock/volt. Even less than a hundred mHz. It save some 15-30minute more juice on your phone. Just Overclock if needed, same as Setting the CPU clock to default.
• There are Rooted phones specializes on battery saving by:
*On Multi-Cores: Stop a core(s) to run. Really helps keep the CPU pressure off.
*Kernel Governors: Smartassv2, Hotplug, blah blah blah.. Search it...
• Limit / Lessen the usage of phone while charging. I don't know why, but I think its to, uhmm... prevent the battery pressure from charging-discharging, i guess!?
• Others are pretty basic. Backlights, GPS, Data, WiFi, Bluetooth... Yeah, no need to explain..

+1 good