Database Info

Monitoring battery life vs usage

On a Diamond I was using battery log to see the effect of various things, data use, push email, tf3d, screen brightness etc.
I was expecting to get best results from following the usual guidance of turn off whatever isn't being used, close programs, dim the lights and such.
I found that some programs do indeed use more memory and cause a bigger drain but many do not. Neither did a gprs connection when left connected.
However, i noticed spikes in battery when opening and closing programs, and disconnecting the data connection. Therefore from this it would seem that I am better off leaving programs open rather than re-opening them many times, and also leaving data connected.
Does anyone have any thoughts on this? This is assuming that abttery log is accurate, I don't want to slam it and say its rubbish, i don't believe it is. I am not sure HOW accurate it is though.
On a side note, people are advised that charging from teh mains is better for the battery. It is certainly quicker but i always thought that trickle charging batteries got them more fully charged (eventaully). Is that based on ni-cad rather than li-ion?
I haven't found either of these topics covered exactly as above so I hope this is not a repost.

I've done a lot of battery logging myself. There isn't really a correlation between memory usage and current flow, like most people think. Having repllog.exe idling in the background doesn't do anything to the battery, in my experience. I don't have data (and only get EDGE), so I can't comment on gprs and the like. Turning the screen off makes a huge difference in consumption. The one weird thing I notice on my fuze is that the current tends to cycle between a low state and a high state with the screen on; it doesn't do it with the screen off. So, if I'm listening to Core player with the screen on (just a random level), the device may alternate between 150 and 240 mA. With the screen off, it will hold steady at 90 mA. This is without any other apps running and with the phone off. Even with nothing running besides background processes and the screen set at 1, the current will fluctuate between 65 mA and 140 or so mA. It's mostly at the lower current, but the higher current consumes a lot of juice.
Long story short, if you're on a plane and are listening to tunes, turn the screen off. Or, if you're running your gps and are hiking or something and are keeping a gps log, again, turn the screen off. You can save a lot of battery that way.
Oh, yeah, I forgot to mention that for a while I tested out no2chem's clock control to see if it saved battery or not (this gets to the accuracy question). I would lower the clock speed on my fuze, and then start logging and compare the current draw under a similar situation at the normal 528 MHz clock speed. I never saw a difference in current draw, although the device would clearly slow down (sometimes too much to be useable). I'm not sure if tBattery was really accurate under those circumstances. It's possible that the lower clock rate messed up the log measurements by a proportional amount, but I just don't know.

I assumed that two-level jumping was because I was constantly opening and closing stuff to measure the effect, and there was a delay in battlog showing this.
I thought it could also be something to do with the radio, but you found it only happens with the screen on. Delayed reaction to the backlight dimming?

how to compare a power consumption of your devices

So, for a long time reading the forum and asking a question along the way, why I have so quickly battery discharging on my phone, I came across an interesting thought: "and from what I actually compare?. someone wrote about 5% per night, someone love to confess on the tab "Journal of the battery and it shows that he is the difference between" running "and"phone on "0.5%. but what is a night (for me it's 8 hours for someone 5). which network who have (GSM or 3G)? Also, we are constantly being developed and modified ROMs and kernels, which also constantly featured the words "lowered energy consumption."
And how do you actually compared the energy consumption of the old firmware to new. usually it sounds like "on the old firmware, I charge the phone every day, and now I charge every 2 days." but we don’t know details of how actively you used options of your phone on the old version, and how use now "(for me, For example the first 3 weeks after buying the phone had lived only one days, but now 2-3 days. but not because the new firmware, but because I'm tired of constantly digging through the phone settings and install the different soft, thus discharging it).
So, our challenge is to develop an algorithm (and in the future opportunities programs), as can be correctly and objectively compare the power consumption of our devices. That at least from the transition to the firmware to the firmware, from one kernels to another to be sure that the phone will not live less than before. Search for programs of this kind I have not been successful, can someone tell me if he knows?
actually look to you for ideas, how best to develop an algorithm testing the phone, and simultaneously bring your own.
then everything will be set out with respect to the software part, because hardware is not subject to us
1. So, first of all we need to start with any initial data. Having read all the threads about power consumption, I have come to the conclusion that the original data should include the following:
- Do wipe battery stat. We fully discharge the phone till shutdown and charge it in off state. after the device is fully charged, unplug it from the charging device and do wipe batter stat from the recovery menu
- To make the calibration of the battery you need to discharge and completely charge in turned off state the device at least 3 times
Here is one of the toughest parts, considering the long battery charging our phones. charging off-state means 4 hours of losing connection. and we need to do it 4 times. One discharge-charge cycle for a complete calibration system, as I understood , is not enough.
all the widgets and programs that can perform any action to in background must be disabled.
well, and then discharges our apparatus up to 95% in quiet mode, to give the battery a little bit cool, and eliminate trouble with 99-98-97% and you can begin testing.
2. Measurement tool. I would have chosen for this purpose, program or Battery Monitor Widget (she effects on discharging battery, but it writes logs, which can be tracked over time the battery status in percentage and millivolts) or JuicePlotter (don’t have logs. We have to extract data from the graphs that it constructs). JuicePlotter showed the best result in power consumption while the CPU time drain more than BatteryMonitorWidget - here's the first interesting fact. Now I’m testing these programs repeatedly to confirm this effect
3. In order to reduce measurement error the device must be discharged at least 20% of one test. or better at 30%. then + / -1% in the testing will not be particularly significant. That why testing process will be long and tedious.
4. In order to understand the power consumption of device in general, you should at least try to understand and share the power consumption of its individual components:
5. power consumption of the screen. For this purpose you can use the widget to extend controls, where you can turn the screen on constantly. And choose any standard wallpaper with middle brightness. we need to measure how much battery discharging for 3 hours the screen on. for small, medium and very high brightness, respectively. you can check consumption on the automatic brightness too. is believed that the turning on an automatic brightness strongly discharge the device..
6. power consumption of the file system. In the good we ought to write a program that creates a file in a loop on the internal flash drive, and anything he writes and deletes the file. Repeat the loop few thousand times to the total time was about 2-3 hours. but until there is no such a program, you can simply copy the file size of 2-3 gigabytes of internal memory with a program such as ES Explorer. In this case, the screen must be enabled to minimum brightness (since we already know how much the phone is discharged from simply turn on the screen) to control the copy process and accordingly the percentage of discharge.
7. Estimation of consumption of the processor. To do this, too, we can write a program that would do any arithmetic operations within an hour of time. But here we get the maximum load, therefore the maximum power of the processor. and it is unlikely it will be different from the firmware to the firmware . But our processor is also able to reduce the frequency and consequently reduce power consumption. And here I think there is much to improve the software. Therefore, must be differences from firmware to firmware. And the best test for this, I think, show any video on device, it loads processor to 30% on average (better view a videoconcert, so there isn’t quite boring) for one hour and thus measure how much discharge our batteries from this view .
8. Estimation of Wi-fi. Then the test can serve up any file copy from PC (connected through wires to an access point, so this segment was not the brakes) to our unit. Since the maximum speed that I managed to squeeze out of the standard N on my Captivate is 0,8 MB / sec I think copying the file size of 2GB will be enough to discharge our device is not less than 20% battery. copy can be perform using the same ES Explorer
9. Rated power consumption in standby mode. here it must enable the network only GSM. turn off the wi-fi and bluetooth. the screen went off and did not touch the machine for 8 hours. Better course would be 24 hours, but I think hardly anyone will be able to perform such a test
Actually look to you for your suggestions and additions, as can be realized by comparing energy consumption of our devices.
from the general collective thoughts we can open thread with algorithm, where you can write your test results according to the algorithm ... and make any conclusions.

[GUIDE] Battery Management for noobs

Hey guys,
So after many months with the XT720 and alot of flashing and trying to get the most out of my battery, i've come up with a few conclusions about battery life in general and how to extend it. I thought I'd share here. This is mostly aimed at people who are new to android and have not experimented like some of the more advanced users we have on this forum. Hope you find this helpful and please feel free to make additions.
General Battery Info
The XT720 was my first android phone, and I came from a long line of typical nokia phones whose batteries would last for ages. I had no idea the kind of power an android device would use. When I started out using it, i was surprised at how quickly the battery would die. You'd think with advancing software we'd have better batteries but sadly batteries are lagging behind in technology. Generally speaking you can expect the following battery life from your XT720.
Heavy use: 10-14 hours
Moderate use: 16-20 hours
Light use: 1 day - 1 day 12 hrs.
Note: New batteries improve with each charge cycle. It is recommended to go through a few complete charge cycles when you buy a new phone. After that, complete discharges are not recommended and its smart to start charging your phone when it hits the 20-25% mark.
How to improve battery life
1: Battery Calibration
If you've ever flashed a new ROM, you must have noticed a sharp decline in battery performance. This is partly due to old battery statistics left behind from your old ROM. Android is a smart OS and collects information over time. The more you use it, the more accurate it gets. In the same way it collects information from your battery usage and reports your battery percentages according to that. When you flash a new ROM, sometimes android thinks that your battery is 100% when its really lower than that and that causes relative reduced battery performance. To deal with that it is recommended that you use a nifty free app called Battery Calibration from the android market. What this does it removes the old battery stats and allows your new ROM to create its own battery stats. Charge your battery to full, use the battery calibration. Drain once till phone turns off by itself and charge to full again. You will notice a sharp increase in battery life.
2. Battery Managment
We all know that android has its own battery management built in but it usually doesnt give complete information about the phone. For that you need to dive deeper into the settings. Usually if you experience battery drain its because of a rogue app and believe it or not some common apps you wont think off drain unnecessary battery. To see your complete Battery Stats input this code into the dialer.
Code:
*#*#4636#*#*
This will take you to a bunch of options. What you're interested in is Battery History. When you tap that it will show you two drop down menu's.
1) Other Usage
2) Since last unplugged
Other usage shows you how long your phone has been running and how long it has been asleep. Also shows you how long your wifi has been on and running and how long your screen has been on. It is important to see how long your phone has been running. For example if your phone has an uptime of 20 hours and its been running 5 hours out of that. Your run time is 25%. Which is very good. Sometimes an app can run even when your phone screen is off. This will represent a longer run time even when you have your phone lying on a desk or something. See this setting and correlate with the amount you have used your phone. Does it seem normal? If no then use the first drop down menu and select
Partial Wake:
Partial wake is basically, any app which takes your phone out of sleep mode to use the CPU even when youre screen is off. These are apps which need to sync or use the phone resources. In this you will see a list of apps and how much they have caused a partial wake lock. See anything unsual? For me one app that caused unsual drainage was latitute. Yes, i had simply signed into it and i didnt know it was updating my location every 5 minutes. Extreme battery drain for me even when my phone was idle. See which app was draining your battery and either tweak the settings or remove altogether.
GPS, Sensors, CPU:
You can also see these in the first drop down menu. Certain apps like screeble use the sensors alot, and hence cause drain. Obviously games, camera, will stress the CPU. See if anything is causing drain in that and adjust accordingly.
Miscellaneous Information
After you have dealt with rogue apps that you don't use that drain youre battery your battery life will depend on how you use your phone. But hopefull these tips will help you with increasing your battery life. I do have some more information on different settings and supposed battery saving applications.
Autosync: When you enable auto sync, you allow google and other accounts to sync on a regular basis. This is important for people who need to use push email etc. It does not drain battery IF you tweak what you need synced. In google for example you can have your contacts, calendar, google+, google reader, gmail all to sync by default. If you just need email, please untick the rest. This will help you save battery life. Increase your update times for facebook and google+ if you dont recieve many updates all the time or turn them off altogether. If you have many services syncing at the same time you will get battery drain.
Wifi Sleep Policy: This is sort of a hidden menu. If you go into wireless & networks >> Wifi settings >> settings key >> advanced >> wifi sleep policy. This has three settings. Never close down wifi, never close when charging, or close with screen off. If you choose never your wifi will always be on, which will in turn crunch the **** out of your battery. If you use it off with screen off, remember it takes about 5 minutes to turn the wifi off. I personally use the never with plugged in. Its an intermediate. So when im plugged in wifi always stays on and when im not it follows the screen off protocol.
Wifi Vs Mobile Data: Having mobile data on all the time, does not drain battery. The only time the battery gets drained is when the data connection is active i.e you have many apps on autosync youll see your battery going down. If you arent doing anything and your phone is connected to Edge or 3G your battery will drain regularly. 2G networks drain less than 3G keep that in mind. If you are actively using your connection, wifi will take less battery because speeds are faster and you will be using it for a little time. Also your signal strength has alot of effect on battery. If you have crappy 3G signals your radio will actively be searching for a connection the same goes for wifi. That is important to keep in mind.
Control Background data: By selecting this option you can allow or disallow apps to connect to data without any permission. Some apps require this like the android market. If you uncheck this apps wont be able to sync automatically in the background.
Milestone Overclocking: This is fairly obvious. The higher you overclock with higher vsel the more battery drain you will have. Some use set cpu with profiles but I found that if i set the setcpu too low while idle It takes time for the cpu to charge up when i recieve a call or turn the screen on. Ringtones lag etc etc. I let android do my CPU management and its fine. and comfortable setting would be 850 MHZ, 56 vsel but you can change according to your phone usage.
Juice Defender/ Screebl / Task killers:
In my personal experience with juice defender ultimate I found that with the above precautions juice defender didnt make much of a difference and actually used more battery. First off theres an extra process going on in the back. Second activating and deactivating the connection everytime the screen goes off uses more juice because your radio has to search for the signal hundreds of times as compared to not having it in the first place. Screebl is good if you dont want your screen to annoyingly turn off while youre doing something but it surely doesnt save battery life. Task killers are a no no for android. They kill tasks which start up anyways, its better to use autokiller memory optimizer which tweaks androids internal memory settings and allows for more free ram without killing processes without reason.
System Apps:
Some system apps run uselessly in the background specially with stock ROM's this is called bloatware. Remove all unused system apps with titanium backup to stop them from running in the background for no reason at all.
A final word
Finally after all this tweaking, just use your phone as normal. Dont worry about the battery all the time checking how much its drained, itll mess your head up and make you enjoy your phone less. Battery temperature also changes battery life. Keep your phone out of the sun or in hot places.

Thanks, good article.

Very detailed and useful
Sent from my Milestone XT720 using XDA App

Thanks for this interessting article!
Could you make a list of the bloatware that can be safely removed?

I figured this would just list all the usual stuff I've heard. I'm glad to say I was wrong! A bunch of useful info here I now plan to put to use. Many thanks
Might want to mention the display being the biggest drain of battery on this phone. Setting it to automatic brightness or lower will increase battery life. I love the screen at full brightness so I don't really follow that, but for those looking to squeeze some extra time and don't mind less brightness...

Thanks guys, glad you people found it useful.
syrenz said:
Might want to mention the display being the biggest drain of battery on this phone. Setting it to automatic brightness or lower will increase battery life. I love the screen at full brightness so I don't really follow that, but for those looking to squeeze some extra time and don't mind less brightness...
Click to expand...
Click to collapse
Yes! Can't believe I missed that one out. In the start id use the lowest brightness setting, which would be fine indoors. But outside it was impossible to see the phone because of its insanely reflective glass. Since we have an ambient light sensor I use it on automatic and it does a good job. Full bright strains my eyes abit thats why I dont keep it on full bright So for people really wanting to save the juice you can keep your brightness on the lowest level. Also when you take the phone out of your pocket and use it, its better to put the phone to sleep with the power button than let it timeout by itself. Those 10-15 seconds for each time you use phone count towards many minutes of unused display time in the end and does make a difference.

This is a very gd post with lots o useful info!! ok i have a qn, is using the phone a lot while the charging good for the battery? And if u let the battery charge even though its already 100 percent for an hour good? srry if it is noob qn...

androidlover123 said:
This is a very gd post with lots o useful info!! ok i have a qn, is using the phone a lot while the charging good for the battery? And if u let the battery charge even though its already 100 percent for an hour good? srry if it is noob qn...
Click to expand...
Click to collapse
1. Using your phone while charging does not affect your battery life, and is neither good nor bad. It is perfectly normal to use your phone while charging and is sometimes recommended while doing battery intensive tasks for example navigating while driving, wifi tethering, playing memory intensive games and finally outputing video through HDMI.
2. Overcharging was a phenomenom is older lithium ion battery. New batteries have bypass circuits. So when your phone reaches complete charge, it does not charge any further. So you should not be worried about overcharging your XT720.
Hope this helps.

Excelent article and good quality info. Thanks and best regards!

awesome article! Great information. Thanks a lot for putting that together. I have already started using a few of the tips mentioned.

u da maaan dude, thanks for a very detailed and informative article

[Howto]Tips n tricks for better battery life

Since we have better battery life on Android r169 version thanks to our devs i'm going to post tips n tricks for a even better battery life
1. Use "GSM auto (PRL) to save more juice while still connecting through 3G
- in the phone setting>wireless and network>MobileNetwork>NetworkMode
we are only allow to choose GSM only/ WCDMA / Auto between two
- but if you use type "*#*#4636#*#*" to phone Information, you can choose more type of networkmode. It is claimed that choose "GSM auto (PRL)" allow you to save more battery (cell standby) while allow you to connect to 3G network.
-there is one more setting which you can change:click settings(windows logo)>select radio band and change it according to your needs
- Please provide feedback on this. Thanks
2. Use AutoKiller Memory Optimizer
- This tool is different from other app killer
- It fine tunes android systems inner memory manager to keep your device fast over time.
- As a side effect it also lowers battery consumption.
- At certain free memory level (e.g. 250mb), the android os will automatically close those apps not in use (according to original android os logic)
3.Use Autostart
- Instead of closing them, it would be better if we don't let the app start from the begining
- You can choose to disable those app that u feel unnessary, so that they will not run during your phone startup
4. Check your Battery Consumption
- Download "Current Widget" or "battery monitoring widget" from market
- these apps will monitor your battery usage and recoded in a log file
- This is the normal consumption rate (varied across ROM, kernel and CPUI frequency and other factors)
credits:XDA
to be continued....

Tips
General Lithium-Ion Battery (LIB) Usage:
• Discharging your LIB fully (or less than 2.4 Volt per cell) is bad for the battery. Every time you do that, it can be said that small part of your battery (some cells) dies (they forever lose their charge). Do not store your batteries depleted, there's a high chance they will die completely or will become very "weak".
• You cannot restore bad LIBs by overloading/heating/praying. You gotta go buy a new one. They DO degrade overtime, some cells naturally lose the ability to gain/give electricity.
• Although it is said that LIBs do not have memory, it's not entirely true. LIBs have gauges that monitor performance of cells, and if you do a lot of small charges, it won't let those gauges to monitor a full battery potential, causing an invalid indication of charge level. A complete charge/discharge should be made when battery capacity seems reduced, that will calibrate gauges and they will provide your phone with correct charge level status. A full charge/discharge cycle should be done every 30 (or so) partial charges.
• LIBs have a shelf-life. Do not buy them to store them. Use them early, use them often, they will die whether you use them or not. Do not buy LIBs to use them in 6 months/year/etc, buy them right before actually using them.
• LIBs have short lives (in comparison to NiCa batteries, etc). You should expect to buy a new battery in 2-3 years after being manufactured. It is caused by internal oxidation and there's nothing you can do to stop or prevent that.
• Worst LIB treatment is to keep it at 100% charge level at high temperature (think laptop/phone under direct sunlight, like car dashboard).
• Best LIB treatment, or LIBs "favorite" charge level - 40%. That's also the usual charge level you buy them with.
• LIBs don't like heat. For example, while always at 100%, typical LIB in a laptop, at temperatures of 25C (77F) will lose 20% (twenty percent!) of full capacity per year. That capacity loss is reduced to 6% (six percent) at 0C (32F), and increased to 35% loss at 40C (104F). So, keep them cool (LIBs like fridges), don't let your devices sit in the sun or overheat at charge. Also, keep in mind that while in use, battery will be significantly hotter than phone/outside environment.
• LIBs like frequent partial charges/discharges more than they like full charges/discharges.
General Android power usage advice from google:
• Although this part is somewhat controversial, they do recommend having a complete, full FIRST charge to be made. If time allows, a preferred time for the first charge is 12 hours. This may have more to do with the OS than the battery.
• Battery on a Android device, in average, will last about a full day with normal use (some videos, mail, calls). That's what you should kind-of expect.
• Speaking in averages, "idling" 3G/EDGE connection (when phone is sleeping and no data is transferred through 3G), drains almost no energy. Just a little more than having 3G/EDGE radio off completely. So when no apps are using 3G, you don't need to keep it off.
• Same goes to WiFi connection - although it's on, if there is no data flowing through it, it uses almost no energy.
• At full throughput (100% data flow), EDGE is using more energy than 3G. In average, 3G is more energy-efficient than EDGE.
• WiFi is using more energy than 3G (when both are at 100% use), but since it transfers files much faster and then goes to "sleep", it's actually recommended to use WiFi whenever possible. Since it'll "sleep" more often than 3G, overall it will use much less battery than using 3G.
• Some bad apps or widgets can use android's "WakeLock", keeping CPU at 100%, screen always-on, or both. I myself have encountered such widget (I won't mention the name, it's in the market) that used a WakeLock to keep CPU spun-up at 100% all the time. That makes a huge impact on battery life. My advice - use a CPU profiling app to monitor the CPU - make sure that CPU slows down by itself when it's not used. So, beware of such widgets/apps. To check for CPU cycles, many recommend OSMonitor (free from market, install it, go to options, sort by "Load" in descending order. It'll give you "busiest" processes at the top). At rest you should be getting about 10-20% for OSMonitor itself, and 1-10% Android System. At rest, everything else should be 0-1%.
• Android slows down CPU when not in use by itself, as a built-in feature. Apps that throttle/change CPU frequency, are not necessarily needed.
Sources:
Wikipedia - http://en.wikipedia.org/wiki/Lithium-ion_battery
BatteryUniversity - http://www.batteryuniversity.com/parttwo-34.htm
Google IO Conference 2009 - http://www.youtube.com/watch?v=OUemfrKe65c
Electropaedia - http://www.mpoweruk.com/life.htm

this one too

this is very useful information, thx a lot!

Sorry Tzacapaca, but I do not understand where I have to type the code in order to have access to other network modes
Could you clarify?
THX

doublej4473 said:
Sorry Tzacapaca, but I do not understand where I have to type the code in order to have access to other network modes
Could you clarify?
THX
Click to expand...
Click to collapse
Call this number with the phone dialer

Very good summary, thanks
I will definitely come back to read again and try in this way extend battery life.

Thnx, great tips to read !

Standard battery Capacity: 1200 mAh
HTC HD Mini have a standard battery Capacity: 1200 mAh.
When the battery loses capacity and you want to replace it, consider that there are batteries in the market for the HTC HD Mini with 1700 mAh Capacity, which would be logical to give a day or two extra pleasure

15MA1L said:
HTC HD Mini have a standard battery Capacity: 1200 mAh.
When the battery loses capacity and you want to replace it, consider that there are batteries in the market for the HTC HD Mini with 1700 mAh Capacity, which would be logical to give a day or two extra pleasure
Click to expand...
Click to collapse
I still like and need my phone so I wouldn't trust those batteries
I would better get an emergency recharge which can charge my phone on the go
Edit: here is one http://www.phonesuit.com/primo-cube-battery-pack-for-android-phones/

hi how do i send a log to show my battery level? its draining way to fast,temperature is 38.8 is that normal?
with the battery moniter widget temperature is fluctuating from 35.5 to 38,stabilising to just over 35.0,also says 190mA in top left for battery indicater

BATFINK74 said:
hi how do i send a log to show my battery level? its draining way to fast,temperature is 38.8 is that normal?
with the battery moniter widget temperature is fluctuating from 35.5 to 38,stabilising to just over 35.0,also says 190mA in top left for battery indicater
Click to expand...
Click to collapse
download current widget and enable log file,right now i have 32.5 C on 100% battery level

tzacapaca said:
download current widget and enable log file,right now i have 32.5 C on 100% battery level
Click to expand...
Click to collapse
thanks dude,can i post log file results here?

BATFINK74 said:
thanks dude,can i post log file results here?
Click to expand...
Click to collapse
sure
...

battery history
hi heres my battery history,is there any clue in here as to why its draining so fast?
also upload current widget log

BATFINK74 said:
hi heres my battery history,is there any clue in here as to why its draining so fast?
also upload current widget log
Click to expand...
Click to collapse
hi,tell me around when phone was in standby so i can figure out
anyway so far it looks bad :O
also i have some Q's :
do you have set brightness on auto in Android or on WM?
is it a fresh install of Android?
did you install apps after that?if yes,which?
do you have GPS on on droid or on wm?

With "CurrentWidget" you can also log applications which are running on background. Then it should be easier to find out cause of battery drain. Also don't forget to write about your current settings ...

tzacapaca said:
hi,tell me around when phone was in standby so i can figure out
anyway so far it looks bad :O
also i have some Q's :
do you have set brightness on auto in Android or on WM?
is it a fresh install of Android?
did you install apps after that?if yes,which?
do you have GPS on on droid or on wm?
Click to expand...
Click to collapse
hi thanks for replying
i have brightness turned down in android,havent touched in winmo
yes its a fresh install
iv installed angry birds rio,a 3d game,zedge,ebay and sky sports apps from market place
gprs is always on in both

my device is currently in sleep mode,will upload a fresh log to show results for sleep mode

For the nexus s 4G , just put brightness on low and turn of background data
Sent from my Nexus S 4G using XDA App

[Q] poor battery life on my HD7

can anyone help me how to fix this problem of mine in my HD7? I've been searching all this time but all i see is for HD2 battery tweaks thread..anyone?

A) Define "poor" battery life. Smartphones typically get half a day to three days, depending on usage and network quality. My HD7 typically gets about 16-40 hours, depending on whether I use it a bit more or less than normal. I leave it on the charger every night and never run out of battery now unless I'm playing games on it.
B) There are lots of things you can do. Turn off push email, and instead check only every few minutes. The HD7's screen may actually get a slightly better battery life on the "Light" theme (the backlight runs anyhow; darkening a pixel takes more power). Set the phone to turn off the screen earlier. Dim the backlight. Turn down the volume (especially if you listen to music).
C) There's a setting (added in Mango) called "Battery Saver" that does some of the changes mentioned above (some quite aggressively - for example, it turns off all automatic email sync). You could use it, or at least tell the phone to use it automatically.
D) Change your usage pattern. Games, GPS, and cellular data are all huge power hogs. Play fewer games (or only play them when plugged in, or play ones without lots of graphical effects, etc.). Don't leave GPS apps running; check them then back out. Don't stream music (although I do, through Zune Pass, and still get decent battery life for a smartphone), movies, etc.
E) Switch the data mode to 2G instead of 3G, at least most of the time. 3G is power-hungry, and often harder to get a signal through so the phone hs to use even more power. Turn WiFi on (yes, on, not off; it's more efficient than the cellular radio when transferring data) unless you have no usable WiFi nearby, in which case turn it off. WiFi automatically turns off when the phone's screen locks, so no need to worry about it using power constantly at idle.

you're absolutely correct! I've done all those steps..if i will define poor battery I'll say it easily drains. I only use my device for SMS and battery drops 5-10% in 1hr? sometimes when I'm charging it whole night and when i woke-up i see the light indicator that it is full charge but the battery indicator is not (86%) i don't know if my battery is defect or there's something wrong my battery calibration or indicator..this suck!

If the light was green (fully charged) but the indicator showed partial charge (I assume you're using something built-in, not the app? The app isn't totally reliable due to multitasking limitations), then you've got a defect. It's possible that it's in software, but much more likely to be in hardware - either the charging circuitry or, more likely, the battery.

to check the percent of my battery I'm looking at setting>battery saver. If its a software problem how could i fix it? Is there a tweak in registry that can make the battery last longer? I've tried different custom roms but only Eburon rom gave a 2 days life battery but when I flash my hd7 to latest Eburon my battery returns to its old state where its easily drain so flash it back to old version of eburon.