Develop Bugs

[Q] A Case for Task Killing?

First, the set up.
I have an Incredible running Skyraider 2.52 with the 2.6.32.15-adrynalyne kernel. I use SetCPU to set some rather aggressive battery preservation, chief among them being the profile that sets the CPU to 245mHz on screen off (using the Powersave scaling so as to eliminate CPU polling). I have Autokiller set to near absurd levels (the Ultimate preset). I even use Autorun Killer to disable some nonsense apps from starting at boot. Needless to say, battery is a priority.
Also, I should note that I am using the 1750 mah Seido battery.
This morning, I charged my phone to 100% (even a little beyond that, as I charged it with the phone off, but not until I hit the green). I unplugged the phone from my car charger at 9:20 AM. Wifi, Bluetooth, and mobile network were all off. I literally did not touch my phone for the next ten minutes, and yet...
By 9:30 AM, I was at 90%!
I quickly started up Froyo Task Killer, which allows me to force stop programs through Android's own task management. I closed several useless but likeable apps (like ONN and G4) and put my phone back in my pocket.
By 12:47 PM, after not touching the phone again, I was at 80%.
Clearly, you can see the difference in battery usage while otherwise in standby.
Is this a clear case for killing tasks, or is there something else at play? I know that task killers are a cause for serious debate, and 2.2 doesn't play nice with them, but this is a pretty weird case.

You're making an assumption that the battery discharge rate (or rather the displayed rate) is linear. In my experience, this is not the case.

You make an excellent point. However, in most ordinary circumstances, and certainly while running stock Eclair, I usually found that the first 10% battery drain took longer, certainly longer than 10 minutes.
Either way, 1% per hour is, all strange battery magic aside, pretty remarkable for a phone that is in standby with screen off in pocket. Especially when given the lengths I've gone to in attempts to extend said battery life.

once froyo hit i uninstalled my task killer.... haven't looked back since.
I currently run SystemPanel by NextApp.
It will prove to you that task killing is practically a placebo but I highly recommend it just to be aware of whats ACTUALLY killing your battery.
I use the stock battery and the OEM 1500mah. I am pretty happy with what I can get out of the extra capacity battery.
Try turning off 3G when you don't need it using the HTC widget.

If you can't stand the stock apps that always start up on your phone but don't want to delete them do as I did and get the full version of titanium backup (3.99) and freeze all the apps. Out will pretty much just like the name says, freeze the apps. You can then thaw them out when you need them.
I got almost 2 days up time and like 12 of those were up on the 1500 battery. Now I have the 2150 i am at 50 hours up and 10 hours awake with still 50 percent to go, that's first charge too, can't wait till it breaks in
Oh and I was reading somewhere that one of the roms has a problem like that. It might be the skyraider
Sent from my Incredible using tapatalk.

mihneagabriel said:
If you can't stand the stock apps that always start up on your phone but don't want to delete them do as I did and get the full version of titanium backup (3.99) and freeze all the apps. Out will pretty much just like the name says, freeze the apps. You can then thaw them out when you need them.
Click to expand...
Click to collapse
Autostarts would probably be an easier way of doing this.

kensikora said:
You make an excellent point. However, in most ordinary circumstances, and certainly while running stock Eclair, I usually found that the first 10% battery drain took longer, certainly longer than 10 minutes.
Either way, 1% per hour is, all strange battery magic aside, pretty remarkable for a phone that is in standby with screen off in pocket. Especially when given the lengths I've gone to in attempts to extend said battery life.
Click to expand...
Click to collapse
why would you bother having a smartphone if your intent is to leave it in the pocket? I get about 24+ hrs uptime one one charge (stock bat). Generally on WiFi, GPS, and Max Brightness for half of it.
Charge at work since I'm at my desk and no problems. Battery life is great, but if you don't want to use the phone in attempts to get max life, seems quite pointless to own such a powerful device.
Skyraider 3.1

You can go into battery info in the settings and see what is causing battery drain.
In my experience, most drain is when I'm inside a building with poor reception and my phone is on overdrive trying to find signal. Usually I turn on airplane mode and use WiFi if that's the case.
Sent from my ADR6300 using XDA App

Maybe its the kernel. Also I would stop killing the apps, not to save battery but because since they were stopped by the user, the Android system might start them up again almost instantaneously. But this depends on core processes and weather Android is done processing any info or other stuff from that app.
Sent from my ADR6300 using XDA App

MMBosstones86 said:
why would you bother having a smartphone if your intent is to leave it in the pocket?
Skyraider 3.1
Click to expand...
Click to collapse
I am not aiming for battery life alone, but I like to leave work and not need to recharge for an hour before I head out. I leave it in my pocket at work because, well, I'm at work. Although I do usually get in a few levels of Angry Birds or Shoot U.
The question is, how can I minimize battery use when my phone is idle so that I have the battery to screw around with it when I want to or have time.
Sent from my ADR6300 using XDA App

mihneagabriel said:
If you can't stand the stock apps that always start up on your phone but don't want to delete them do as I did and get the full version of titanium backup (3.99) and freeze all the apps.
Click to expand...
Click to collapse
I never knew what that did. I knew the feature existed, but hadn't bothered looking into it. I already bought the full version for totally hands-free installs, so I guess I can now take care of Peep and Flickr.
sl0wd0wn said:
Autostarts would probably be an easier way of doing this.
Click to expand...
Click to collapse
I had never heard of Autostarts. I seem to find that any apps that aim to disable startup entries always fail to list the apps I am most interested in blocking, but for 90 cents, I am definitely willing to give it a shot.
Edit: I haven't had a chance to determine its effect on battery life, but Autostarts is brilliant. It makes so much more sense to actually change startup entries than to try and stop a task after it starts. I also was unaware of how many events trigger apps to start. That is one powerful app.
Sent from my ADR6300 using XDA App

The 10% drop at the beginning has nothing to do with apps or task killing. It's a bug, the battery isn't telling the software the correct percentage it is at. Killing apps won't do anything to fix it.
If you want to 'fix' it, do a bump charge. Turn off your phone when it hits green, keep it charging till it hits green again.

HTC Desire bad battery, how do i improve it?

HTC Desire bad battery, how do i improve it?
http://myhtcdesire.com/tag/battery-life
trying this now, but any other?

Actually this article from androidcentral is really complete in terms of settings to reduce battery consumption:
androidcentral.com/keeping-your-charge-how-improve-battery-life-your-android-phone
You can also have a look at this one from howtogeek:
howtogeek.com/howto/25319/complete-guide-to-maximizing-your-android-phones-battery-life/
When battery drains a lot it is important to find the cause, in this case tools like systempanel are useful, but keep in mind that it is a good thing to stay away from task killers as explained on lifehacker [what are task killers and why you shouldn't use them]:
lifehacker.com/5650894/android-task-killers-explained-what-they-do-and-why-you-shouldnt-use-them
Hope this will help !

A bad battery is mainly due to either it being faulty or by a stupid amount of usage. Remember that using 7 home screens, live wallpaper, widgets, apps running in the background. All of this counts towards usage. I don't know about calibrating a battery. Some people say it works, some say it doesn't.
I did a little useless experiment the other day where I had my phone at 55% battery and I decided to see how much battery would be used over 24 hours with as little usage as possible. I managed to get 8% of the battery used using 2mA. Hope that puts something into perspective for you.

I tried CPU tuner on the stock ROM and it gave some life to my battery, but I've just flashed a new ROM recently, so hopefully it'll work better.
GoogleJelly said:
A bad battery is mainly due to either it being faulty or by a stupid amount of usage. Remember that using 7 home screens, live wallpaper, widgets, apps running in the background. All of this counts towards usage. I don't know about calibrating a battery. Some people say it works, some say it doesn't.
I did a little useless experiment the other day where I had my phone at 55% battery and I decided to see how much battery would be used over 24 hours with as little usage as possible. I managed to get 8% of the battery used using 2mA. Hope that puts something into perspective for you.
Click to expand...
Click to collapse
Can you clarify "as little usage as possible" to get that 8%? Do you mean like switching off everything, or simply not using the device but keeping all the apps as they were?

Memory and Battery ... what do you get?

Apparently, the battery life and the low internal memory are some major drawbacks of this otherwise great handset, so I though of putting up some experiences of what users report from their experiences with internal memory and battery life.
(After installing all programs and under normal usage)
ROM:
System 260MB => 32MB free
Data: 150MB =>32.7 free
Strategy: rooted, uninstalled htc stuff.
Battery Life:
24-36 hours
Remarks:
I feel the battery behaves rather strange, think there is definitively room for improvement. Some days, it hardly uses 5% over 12 hours!! Then, on others, without touching it, it looses over 50%!!
I am currently playing around with the Network settings and will see what I find.
Underclocking on demand should further alleviate the problem I hope!
With the original WF I easily got 4-5 days and the battery is only marginally smaller so should be possible to get closer to this range

Here my results:
About 50 MB free of ROM.
About 100 MB free of RAM.
Stock ROM, S-ON (waiting for htc unlock and cyanogenmod)
Battery lasts under normal usage 2 days, light usage 3 days. (When i sleep phone is in fly mode and there's no battery drain)
Normal usage: little browsing, messaging, mailing, music listening, checking news and weather, maybe a phone call.
Light usage: messaging, mailing, a bit music listening, calendar checking, very very little browsing
The biggest battery drain is the screen, especially when playing games (15 minutes dragon fly gives 10 % battery drain) and browsing, market checking/updating.

Everything stock:
free ROM: 47
free RAM: 122
Around 2 days battery use if I don't play too much Airport Mania 2, or else 10 minutes play equals minus 5% battery

UPDATE:
I changed some settings to maximize battery performance, notable
Location => Disable "Use Wireless Networks" (battery eater!!)
Wifi&Networks: Mobile Network Settings:
Network Mode: GSM only (OK I don'T need the fast one)
Enable Always-On: DISABLED
Plus I set it on Flight Mode during night (I used Gentle Alarm to do it before, but apparently there is a bug where it makes it consume engergy nevertheless so do it manually now for the moment)
Results:
For now, 3-4 days!
Will continue trying out (but now it will take a week or two to finish some cycles ;-) )

RAM : 241 free / 160 used
ROM : 70 free / 80 used
Cyanogenmod 7 / 1500mAh HD7 battery
1,5-2 days with fully wifi opened.

Sure you can kill 3G, WiFi etc but then why have smartphone and dumb it down?
Here are a few battery saving tips I've learned from owning a GSM Hero and Desire HD (my gf has WFS which is why I'm lurking here... just ordered a XTC Clip for it).
Unfortunately when the green light says you're phone is fully charged this isn't always the case. The battery is likely to be mis-reporting its capacity and % used, this can cause your phone to die when the battery still has remaining charge. So, we're going to fix that.
Assuming you have already rooted your phone, download Battery Calibration tool and CurrentWidget.
Place a CurrentWidget widget on your home screen and charge your phone until the widget says 0mA. This means it has reached fully capacity.
Once it hits 0mA on the widget, open Battery Calibration and wipe battery stats.
Reboot your phone whilst still plugged in and upon reboot it will recreate a new battery stats file, however now it will know the battery's max capacity and will correctly report battery % used.
I do this about twice a week. Maybe once a month I will also let it completely die and then fully recharge whilst off, before powering on and repeating the above steps.
Other things you can do to increase battery life are:
Change the sync interval of apps like Facebook, Weather etc. I usually set most things to every 3 or 4 hours, with Flickr only being once a day.
Don't run the screen at full brightness if you don't need it. On my DHD I find 40% to be best for most conditions, with only really bright sun making it hard to read... in which case I bump it up to around 75%. Auto-brightness if ok but it tends to be on the bright side on most Sense ROMs so hopefully someone will work out a way to tweak the values for WFS. I had a play about with custom values on DHD but after testing for a while I still prefer to control it manually. It's a personal thing though.
Remove crap you don't need. Stocks, News, eReader, Twitter etc are always the first to go when I install a new ROM. I use Root Explorer to delete them but there are various ways to do this including Titanium Back-up or by using ADB. You can find everything in /data/app & /system/app. Just be sure to do a nandroid backup in case you delete any system critical apks.
Change Wifi sleep policy to Never.
Limit your homescreen widgets to only ones you really need. Having 7 screens packed with widgets and apps will cause battery drain.
Turn off Power Saving mode. I tend to find it doesn't really help and just makes your phone quite useless when you hit the pre-set % where it activates.
Never use Task Killers. This link gives an excellent explanation.
Finally, wait in hope for an overclocked and undervolted kernel, different radios and custom auto-brightness values
If I can think of anything else I'll post it here

don´t know why so mutch people get worried about the battery. for me the only thing that counts is that the battry takes me over the day. i mean i go out an seven am and get bat at 5pm, so thats the time i need my battery to hold. maybe i need some backup to get until 22 pm and everything is alright.
for me i doesnt matter if i´ve to recarge after one day

Yeah, for some people it can become a bit of an obsession. However, it still think it's worth taking a few simple steps to get the best out of your device

For some people 8 hours between charges is fine. For me, I like a phone that can run for 8 hours between charges, but also run for 48 hours between charges (without having to go to dead mode by turning on airplane). I go camping, stay the night someplace else, forget my charger while going on a trip or just want the freedom of not having to find an outlet and drag my charger with me if I want to have a phone run for more than 8 hours. So I get off work, change my clothing and run out the door to my after-work sporting event, then head out for a few beers afterwards with the team and I barely have enough juice left to call my wife or check on a few game scores.
It's important. Not having it be important means your phone is running your life or you just always have the same routine, which is fine for you maybe but I like to head out.

About 7 hours running CM 7. Battery life is very bad at the moment.

[Q] How to super Optimized Tmo Sammy S2 for best battery performace?

So I switched from the iphone with edge to the Tmo S2 with Jugg 5.0 ROM + Go Launcher. I really appreciate the 4g speed. However, the overall experience is not as smooth as the iphone and the battery life sucks big time. I normally have to constantly plug the phone in whenever I can. It works ok when I'm at work but when I'm out all day my battery won't last more than half a day. It's so bad to the extent that I have to turn off my phone and turn on when I need to call or text so I can keep the phone alive the whole day. I tried Juice Defender but it didn't help my battery at all.
Yesterday I spent a few hours on XDA and I came up with these solution to my battery problem:
+DarkSide Digital Warfare v2.7 ROM (couldn't find 2.5.1 version)
+Flash Synergy Kernel over (supposed to give better battery)
+SetCPU app (auto detection)
+Zeam launcher
So far, it seems to be better on the battery. Is there anything else I could add to make my battery last longer? I need the phone to last at least the whole day without charge. I'm constantly on 4g looking up stocks, reading news, email, google voice, grooveip, facebook, turn by turn navigation, music, netflix, youtube ...
Thanks,

Welcome to Android.
From what it appears, you seem to be a heavy user. The most you can get out of a Android device with heavy usage is 3/4 of a day (14-18hrs) tops.
You have 2 choices, either you travel with the power cord not to far away and plug it when you need it or you invest a whooping 10$ and buy another battery.
There are tricks to keeping your battery healthy but lasting all day as a heavy user will be very difficult.

If this is a new phone it takes a week or so for the battery to settle in a hold a charge well. After a week or so you'll notice your battery is lasting longer. Also make sure that nothing is keeping your phone awake 100%. Some apps don't play nice and cause issues. Welcome to Android.
Note: navigation kills battery fast, when your using it try to plug into a car charger or something.
Sent from my SGH-T989 using xda premium

There are a lot of things you can do to improve battery.
1. Juice Defender (which you say you have already tried)
2. Limit the number of widgets you run or run no widgets like I do
3. Turn the screen brightness down all the way
4. Don't use Live Wallpaper, also, try to pick a dark coloured wallpaper since white/light colours seem to use up more battery.
5. Uninstall apps you don't use.
6. Turn off GPS unless you need to use it.
7. Turn off sync completely or only have your gmail sync. I don't need to be notified when I get a facebook message so I don't need it syncing every few minutes or every hour, I can check that manually myself.
8. Turn off animations.
9. Close background apps that are running that you aren't using.
10. Use Task Manager to close open apps when you are done using it. Task Manger is your friend.
11. Enable Power Saver Mode.
etc etc.
Those are the main things that I tend to do. I plug my phone in every night before I go to bed as well so I am not sure how long my battery actually lasts. But typically after 16hrs of use I still have 60% battery when I go to bed.
Currently my phone has been on for 7hrs 15mins and I have 87% battery. So you can do the math. I am not as heavy a user as you seem to be, but hope this helps. Peace.

Check out this video it helps show you how to save battery. Enjoy!

Thanks for the inputs guys. I should have said I was looking for Rom/Mod/Scripts/Apps... that can be flashed onto the rooted phone. I have done all the basic battery saving housekeepings as listed by Chochiwpg.
Chochiwpg said:
1. Juice Defender (which you say you have already tried)
2. Limit the number of widgets you run or run no widgets like I do
3. Turn the screen brightness down all the way
4. Don't use Live Wallpaper, also, try to pick a dark coloured wallpaper since white/light colours seem to use up more battery.
5. Uninstall apps you don't use.
6. Turn off GPS unless you need to use it.
7. Turn off sync completely or only have your gmail sync. I don't need to be notified when I get a facebook message so I don't need it syncing every few minutes or every hour, I can check that manually myself.
8. Turn off animations.
9. Close background apps that are running that you aren't using.
10. Use Task Manager to close open apps when you are done using it. Task Manger is your friend.
11. Enable Power Saver Mode.
Click to expand...
Click to collapse
I'm up 5hr 45mins on battery and my battery is at 41%. Let's see if it will last for today. I will put Juice Defender in tonight to test out the battery tomorrow.

DroidNo0b said:
Thanks for the inputs guys. I should have said I was looking for Rom/Mod/Scripts/Apps... that can be flashed onto the rooted phone. I have done all the basic battery saving housekeepings as listed by Chochiwpg.
I'm up 5hr 45mins on battery and my battery is at 41%. Let's see if it will last for today. I will put Juice Defender in tonight to test out the battery tomorrow.
Click to expand...
Click to collapse
You could run Juggernaut with Faux Kernel and Gideon's battery scripts. Or Telus T989D stock ROM lightly tweaked with same kernel and script. Got good results on those as well. Good luck.

Btw, has anyone had tremendous increase in battery life using the after market extended battery?
Thanks,

Use fox star rom
Sent from my Galaxy SII T-mobile using xda premium

DroidNo0b said:
Btw, has anyone had tremendous increase in battery life using the after market extended battery?
Thanks,
Click to expand...
Click to collapse
If you are talking about extended batteries that don't require a custom enlarged back cover, you will not get the battery increase that you are looking for, not even close. I cannot speak for the heavy duty ones that require an enlarged back as I do not own one

Gideon's scripts are great with Juggs. Underclock it as well like 384-1080 is a great setting. Also let die all the way down and charge all the way up and repeat for a few cycles. And don't stare at your phone every few seconds either lol! Another thing are the notification lighting buttons at the bottom. Drop to 1.5 seconds.
Sent from my SGH-T989 using xda premium

yoft1 said:
If you are talking about extended batteries that don't require a custom enlarged back cover, you will not get the battery increase that you are looking for, not even close. I cannot speak for the heavy duty ones that require an enlarged back as I do not own one
Click to expand...
Click to collapse
I have the extended 3800mah battery. It's insanely fat and makes the phone look hideous. On top of that I really don't feel like the battery lasts all that long at all. It's in my pocket all day at school and by 3:30 I'm at 35%. This thing cost me 65$. Total ripoff. I'd suggest spending 20$ and buying two more regular batteries. See what that does for you all
Sent from my SGH-T989 using XDA

A few things you can do on ANY ROM to improve battery life.
*) Decrease screen timeout to the lowest possible setting.
*) Adjust screen brightness to the lowest level you can tolerate.
*) Decrease the backlight key timeout to the lowest setting ( or off if you have the option )
*) Be sure to only have wifi and gps on if you are using them.
Those will help quite a bit in general however, a ROM like Juggs is meant to really take advantage of the power of your device so its probably wise to move to a different one if max battery is your goal. I love Juggs but had to move on to the AOSP stuff. Also, heed the advice above, allow the ROM a few days to "settle" before making a switch or even a judgement of its performance.

Thanks for the replies guys. So my phone lasted for 9hrs today which is a little bit of improvement. I was streaming netflix for half an hr on the train on the way back home so that may have drained the battery. I have just installed JD, will post back how it goes tomorrow.
So the extended battery is a no go eh. I really don't want to lug around a few extra batteries. I want to carry as little as possible. I normally carry my phone and my ipad but now I tend to not use the ipad much now because the S2 screen is pretty gigantic for a phone.

DroidNo0b said:
Thanks for the inputs guys. I should have said I was looking for Rom/Mod/Scripts/Apps... that can be flashed onto the rooted phone. I have done all the basic battery saving housekeepings as listed by Chochiwpg.
Click to expand...
Click to collapse
I know the point was already made but just to reiterate, you can get 2 Anker extended batteries (same size as regular battery) and a universal charger for like $20. This will leave you with three batteries. One for the charger, one for the pocket, and one for the phone. With this system its pretty easy to always have one full battery ready to go and one charging. The battery is small and can just go in your pocket, or maybe even in your wallet depending on your preferences. It solves the problem completely. I don't think you are going to do much better because if you are a heavy user then your battery is going to be used because your phone isn't going to be sleeping.
Good luck.

tablador said:
I know the point was already made but just to reiterate, you can get 2 Anker extended batteries (same size as regular battery) and a universal charger for like $20. This will leave you with three batteries. One for the charger, one for the pocket, and one for the phone. With this system its pretty easy to always have one full battery ready to go and one charging. The battery is small and can just go in your pocket, or maybe even in your wallet depending on your preferences. It solves the problem completely. I don't think you are going to do much better because if you are a heavy user then your battery is going to be used because your phone isn't going to be sleeping.
Good luck.
Click to expand...
Click to collapse
If you read my post above. I'm against the idea lugging around too many things. It's also a hassle to swap the battery and keep them all charged. I may be a heavy user but it's not like I use the phone all the time. I use the phone heavily early in the morning on the way to work and after 5pm on the way home after work. The commute each way is roughly 45 mins. In between the commutes i make a few calls and texts through GV. I don't think i'm that of a really heavy user.
Anyway, it's noon and I'm at 75% with JD on and setCPU to 384-1084mhz which is pretty promising.

Questions go in the Q&A section

Since you changed kernals, you aren't going to benefit from TDJ's battsaver script you can use with the stock 2.7 kernal.
Go lower on the max frequency. Something below 800 mhz. Setting a negative gloval mV doesn't hurt, and if you can get to -62.5, that's great.
Oh, and when using data, try GSM only...
To be honest, the larger problem with battery life is typically the user. There's no real magic on making the phone last longer other than using it less. If you're going to be power using the hell out of it by using 4g for hours streaming media, your battery is going to be ****.

8Fishes said:
Since you changed kernals, you aren't going to benefit from TDJ's battsaver script you can use with the stock 2.7 kernal.
Go lower on the max frequency. Something below 800 mhz. Setting a negative gloval mV doesn't hurt, and if you can get to -62.5, that's great.
Oh, and when using data, try GSM only...
To be honest, the larger problem with battery life is typically the user. There's no real magic on making the phone last longer other than using it less. If you're going to be power using the hell out of it by using 4g for hours streaming media, your battery is going to be ****.
Click to expand...
Click to collapse
Don't you think it is ironic for me to switch from the iphone to the S2 because I couldn't stand the slow 2g Edge connection then have to lower data speed to GSM (2g) just so I can use the S2 long enough?
I think the S2 is one heck of a device but the OS and Apps are not running very efficiently.
I tried the ICS ROM ARKSIDE.UCLE2:: x[BETA07.1] in the last 2 days with setCPU at 384-1026Mhz. I have had great battery life. I got home at 12 am yesterday with a 2% battery. Today it's been 7 hrs on battery and my battery is at 70%. I don't know if it is the ROM, setCPU or a combination of the two but I'm pretty happy with the phone right now. ICS is awesome too.
I highly recommend that solution to anyone having a short battery life problem with their S2.

It is a little ironic since you did bring up the comparison. What I was attempting to do was to bring the phone more into spec of an iphone to get similar battery life. You're probably going to even get better runtimes due to the battery having a much larger capacity and better screen technology. All that superior hardware packed in the t989 is going to need more juice to run.
It's great you're getting good runtimes now. From my personal experience, once I drop down to the single digit percentages, it starts lasting a lot longer per percent. If you wanted to squeeze all you can from the device, those 2000mah aftermarket cells might add another 15~30 minutes.

[Q] My HTC One V drains battery fast and lag

HELP EVERYONE
MY HTC ONE V drains faster even in normal use.
I just use the phone for texting
Wifi OFF
Data OFF
GPS and Location OFF
Bluetooth OFF
from 77% after five hours it became 39%
and also is the HTC One V lag? is it normal? how to run the device so smooth?
THANK YOU IN ADVANCE EVERYONE FOR HELPING ME. GRATEFUL :")

Def not normal. My battery with everything on WiFi, sync etc. And playing music for 4 hours my battery is at 72 after 10 hours
Sent from my HTC One V using xda premium

You have an app that uses the cpu too much = it eats a lot of battery.

Yea true! Some app is sucking the juice off your battery! See if you have some background app running which is trying to connect to the Internet (Since you have both data n WIfi off). Usually these apps eats up a lot of CPU speed. Could explain the lag issue too
Also does you phone heat up?

Great battery life on this phone. Better than most I've tried. Watch what apps you have installed as well. They might be tapping the juice in the background.
Sent from my HTC One V using XDA

yep something is draining ur battery and eating lot of ram
wt free ram ua having?
and if u use swift key x thn think twice it uses more thn 3mb ram when u nt using 50+ whn ua using
soo think ovr it
dnt keep screen brightness to max
it will drain juice twice faster whn ua at home keep it low and when out 25% is enough to make u see the screen in bright daylight
Sent from my HTC One V using xda premium

paarthdesai said:
yep something is draining ur battery and eating lot of ram
wt free ram ua having?
and if u use swift key x thn think twice it uses more thn 3mb ram when u nt using 50+ whn ua using
soo think ovr it
dnt keep screen brightness to max
it will drain juice twice faster whn ua at home keep it low and when out 25% is enough to make u see the screen in bright daylight
Sent from my HTC One V using xda premium
Click to expand...
Click to collapse
Just keep it at auto-brightness...
Sent from my HTC One V using XDA

Yes I must point out that the battery life on this phone as I have observed is quite above average.

RaceAce said:
Yes I must point out that the battery life on this phone as I have observed is quite above average.
Click to expand...
Click to collapse
I definitely agree on that. At this day and age of smartphones and their battery lives, this phone is rather exceptional.

Use apps like Watchdog and Wheres is my droid power to check what is using more cpu/battery! And remove it or find a alternative
Sent from my HTC Desire using XDA

Its always better to install apps which are without ads (mostly freewares are like that only). Keep the brightness at optimum coz its the screen which uses most of the battery.
The more the softwares are running at a moment, the more the RAM is used and hence the battery runs out qiuckly.
Dont keep wi-fi or internet connectivity open always.
Or else u can install third party softwares like Juicedefender or Easy Battery Saver.

Oh and most importantly NO TASK KILLERS!
Sent from my HTC Desire using XDA

iamsonal said:
Its always better to install apps which are without ads (mostly freewares are like that only). Keep the brightness at optimum coz its the screen which uses most of the battery.
The more the softwares are running at a moment, the more the RAM is used and hence the battery runs out qiuckly.
Dont keep wi-fi or internet connectivity open always.
Or else u can install third party softwares like Juicedefender or Easy Battery Saver.
Click to expand...
Click to collapse
Or you can install the program AdFree, set the adress ip for ads to be ignored and you will have your phone ad free .
And those softwares "juicedefenders" are good on a short term but on the long run it causes problems.
Use it as stock without any programs that help you to have more battery or **** like this..

Check the battery usage through Settings > Power > Battery use.
No need to use a third party app for this (unless you've removed this by any means).
Sometimes software issues cause these problems on the phone (even on the stock ROM). Common culprits are "Phone is idle", "Inactive" and "Android system". If these are reporting battery use above ~10% (and you haven't actually had the phone inactive for most of the time), the problem should be resolved with a factory reset.
Otherwise, unless you've tampered with the bootloader this would be covered under the 24 month manufacturer's warranty (12 outside EU) and the device should be sent in for a battery swap / given back to retailer as DOA.
Also, the device isn't the fastest one. The processor is running at 1Ghz with 512Mb of RAM to go along with it. The solution is to load a kernel with overclocking capabilities (Titanium for example) and crank up the CPU to 1,5 or 1,7 GHz. I would assume all of them can run 1,5 GHz as I suspect the processors are actually underclocked to keep battery life long.
Obviously this would reduce your battery life, but having less than 24 hours of battery life on an unmodified One V is what I would call poor unless you are a heavy user.
I hope this helps.

mysdavey said:
Check the battery usage through Settings > Power > Battery use.
No need to use a third party app for this (unless you've removed this by any means).
Sometimes software issues cause these problems on the phone (even on the stock ROM). Common culprits are "Phone is idle", "Inactive" and "Android system". If these are reporting battery use above ~10% (and you haven't actually had the phone inactive for most of the time), the problem should be resolved with a factory reset.
Otherwise, unless you've tampered with the bootloader this would be covered under the 24 month manufacturer's warranty (12 outside EU) and the device should be sent in for a battery swap / given back to retailer as DOA.
Also, the device isn't the fastest one. The processor is running at 1Ghz with 512Mb of RAM to go along with it. The solution is to load a kernel with overclocking capabilities (Titanium for example) and crank up the CPU to 1,5 or 1,7 GHz. I would assume all of them can run 1,5 GHz as I suspect the processors are actually underclocked to keep battery life long.
Obviously this would reduce your battery life, but having less than 24 hours of battery life on an unmodified One V is what I would call poor unless you are a heavy user.
I hope this helps.
Click to expand...
Click to collapse
Actually, a good kernel can improve battery life even if you overclock your cpu. HTC's kernel doesn't come with all the tweaks available for volting and battery life. So if a good dev makes a good kernel, the battery should be the same as running on stock, but with faster performances. Adi_Pat has done a great job with his kernel. I was running it for 2 days until I needed to get a replacement for my phone and now I am waiting to get a new one so I can run it again. I even overclock it at 1.9 ghz and run it for 1 full day and after almost 8h of wifi on, the battery still had 50%. So if you don't have an app that kills your juice, you have definitely a poor battery built in.

does it lag
it was going to buy this phone but saw this vid /watch?v=JptIYZl8qmE that said it was very lag. do you think i should buy this or the sony arc s. plz help

I had some similar issues until I did the following:
Run the battery completely dead until the phone shuts itself off, then put it on the charger with the phone off. Charge it until it is at 100%. Take it off the charger and turn it on. Turn it off again, put it back on the charger until the LED is green, then turn it on again. This helps Android to calibrate the battery.
Install Quick System Info and see what apps are running and how much resources they are using. Also, close all apps, then go into Settings>Apps>Running and see what is running. Look for any apps that shouldn't be running and uninstall them. You have something running in the background and need to get rid of it, this will help you do that.
Uninstall Swiftkey X or Thumbs Keyboard or any other keyboard apps you put on there. Uninstall any weather/clock widgets like HD Widgets or Animated Weather. Use the stock keyboard and stock weather widget (they both work pretty well).
After doing all of this I consistently get home after 10 hours from work with about 60% after moderate usage. I also have almost no lag unless I am playing a more graphically intensive game. Couldn't be happier.