Database Users

Battery charging period

Hi all!
Currently my battery drains about 3% per hour in sleep mode, I don't know if it is normal or not, but the point is that I don't want it to worse rapidly.
For this reason I am asking you, how often you charge battery, if you wait it is fully discharged or not, etc...
In effect it is because I asked it to my professor about this and he answered that different than the old Ni-Cd battery packs requiring the deepest charge-discharge cycle possible, these new generation Li batteries on contrary need to be charged as much as you can and have a durability inverse proportional to deepness of charging process; this means it is better to charge it every time it is possible without to let it discharging.
Now, share your opinions about that...

He's right! Li-Ion and Li-Polymer batteries are most efficient when charged frequently, with a deep discharge/recharge about once every 3 months to reset the battery condition monitors built into the batteries.
They are best left on a USB charge when near a PC, but of course a long day out with these new devices often means they are pretty run down at the end of the day.
In reality, the battery life, even when frequently discharged will probably outlive the lifespan of the device but I've had a few older ones that have needed a new battery after 3 or 4 years.
3% use per hour in sleep mode isn't bad considering it is maintaining a phone signal all the time- does it regularly poll for emails etc?

Thanks for your reply!
About drain issue I can say I use WMLonglife that should disconnect idle connections after a prefixed time and it seems to work as what I can see when screen is on. I can not confirm its regularity on screen off mode, but I presume so, given its proper behaviour in other mode.
I can add that I have a "flat" connection and every connection is preferrably (in order) Hsdpa, 3g, gprs.
My Leo is equipped with:
1.43 T-Mobile UK ROM, 1.24.xxx radio
Don't know if it is important.

I've seen this probably
3% per hour is bad because it means the batteries full lifetime without turning it on would last close to 1¼ days only. You either are on the limits of cell coverage or more likely your device is going to screenoff instead of sleep. Think what you have tweaked and investigate power states. Also, there might be an app running that requires some functions that are available only during power "wasting" power states and keeps the device in screenoff power state.

Thanks for your contribution... but how can I investigate on its real power state, how can I assure if it is really in sleep mode or has only shut down screen?

Same here. Battery lasts less than a day without much usage. I switched off 3G completely now and am testing how long it lasts now.
There is a HTC location option (in the configuration tab of Sense) which can be switched off. Perhaps it is this thing which eats power? What's it for anyway?

The location option is for determining your current location for services like actual weather conditions. It determines your location by using the GSM base stations and signal strenght.
You could disable this, but above mentioned services will not update automatically anymore.
Might indeed want to check any programs that could have auto-update/sync with internet on. My battery typically drains 7-10% per night with half-hourly sync (weather, twitter, mail, etc) and all other options like location services on. I'm on Vodafone branded 1.43 NLD stock rom.

Cavallipurosangue said:
Thanks for your contribution... but how can I investigate on its real power state, how can I assure if it is really in sleep mode or has only shut down screen?
Click to expand...
Click to collapse
The best way is to download Battlog and check from logs what is happening. It tells you the states and everything. The best thing is if the logging stops during standby. This means it IS sleeping

Terrible battery life

Hi -
I've had my HTC HD2 a few days and although I'm happy with it's features, I'm really frustrated by the poor battery life. The first day I used it the battery was dead within under 12 hours from me starting to use it, and at the start it was fully charged. On this first day I did have email and weather etc on auto check though.
So last night I disabled weather, set email to manual checking and disabled a few other things, but did leave HSDPA and 3G on. There was a slight improvement today but not much, the battery lasted the full 12 hours, but with only 2% remaining.
Both days I don't think my usage was very high. I'd maybe had 10 minutes of phone calls, sent around 10 text messages, listened to 45 minutes of music, checked one or two websites, and played games on the phone for about 15 minutes. Imagine how it would be when I need to make several calls in a day.
I have searched the forum for tips on improving battery life but the main suggestions seem to say that I should disable HSDPA and 3G but one of the main functions of the phone is internet usage and I don't see why I should how to switch to manually putting these settings on and off each time I want to use the internet, just so I can get a longer battery life - the battery should be able to cope with moderate usage!
Does anyone have any further suggestions?
Thank you

Look for an application called 'Bandswitch', it can disconnect idle connections. THis way 3G won't be enabled when you don't need it, should save some battery.
Disable automatic screen brightness and set it to something like 30%.
Disable location services and stuff.
Give the battery some cycles to reach full potential.
But of course, gaming, internetting and listening to music will drain the battery faster. It lasts about 2 days for me with moderate use (some internet, some playing around, etc) which is pretty fair imo.

dagrim1 said:
Look for an application called 'Bandswitch', it can disconnect idle connections. THis way 3G won't be enabled when you don't need it, should save some battery.
Disable automatic screen brightness and set it to something like 30%.
Disable location services and stuff.
Give the battery some cycles to reach full potential.
But of course, gaming, internetting and listening to music will drain the battery faster. It lasts about 2 days for me with moderate use (some internet, some playing around, etc) which is pretty fair imo.
Click to expand...
Click to collapse
I'll give that a try. So will it automatically enable it when I start browsing the internet or something?
I already changed the screen brightness and disabled location services though. That didn't seem to make a big difference.
And how much difference does giving the battery some cycles make?
Thanks.

dagrim1 said:
Look for an application called 'Bandswitch', it can disconnect idle connections. THis way 3G won't be enabled when you don't need it, should save some battery.
Click to expand...
Click to collapse
Sorry, but it doesn't work that way
Bandswitch can definitely do 2 things- it can disconnect idle connections, which will reconnect when needed, but this won't switch the transport between 3G and GSM, and has little effect on battery life
Or it can be used to manually change between 3G and GSM, using whichever is selected for its current transport and then autodisconnecting if required. It is the action of switching to GSM which has the most impact on battery life, but there is no way to switch automatically between to 2 as it needs a phone radio off/on to execute the switch.
Poor 3G signal conditions will hammer the battery because the phone will continually hunt for the strongest signal and switch constantly between modes. If your 3G signal is less than 2 bars I'd suggest switching it to GSM until you are in a stronger signal area. Do this by going to Phone/Menu/ then scroll down to Band and from there switch between Auto and GSM. If that makes a difference then you could install a small utility to make the switch easier to access.

seems very odd, mine was fully charged around 11pm last night, have sent around 20 texts, 20 mins calls, had wifi on, done some browsing, abit of sat nav and its on 68% 20 hours later.

I get at least 24 hours with moderate use. Most of the time i get around 30 hours.
I have weather and peep updating automatically + email retrieval at every hour.

When I first got mine it was lasting less than 12 hours too.
Now I'm on ROM 1.61 and have the following settings:
HSDPA disabled
Weather update every 3 hours
Twitter updates ever 1 hours (though it actually only updates when I scroll to the Peep tab)
Facebook auto updates - Off
Stock auto updates - off
Bluetooth and Wifi off unless needed.
Screen brightness - 30%
Haptic feeback, Vibration - off
Push Email - On
I'm getting over 24 hours of life out of a full charge now. I have got the push email set to manual updates only during off-peak hours ie when I'm sleeping. During the night the charge drops around 1% per hour. It was at 47% when I went to sleep last night and was 40% when I woke 7 hours later. This seems to be typical overnight drop for me.
Over my first few days of tinkering and setting up I found the battery drain to be massive. Once you settle down to regular usage it is a lot lot better.
However, just to be careful, I do now have a desk cradle at work so I can charge my phone if I have to.

Prior to my most recent hard-reset I found that if I left the phone in stand-by over night, with it checking for email every 5 minutes, and weather every 15 minutes, the battery would go from 100% to zero in less than nine hours. And that's without using it at all! As an experiment I tried turning off everything that could possibly be using the data connection, and turning off 3G, so nothing was running at all except the phone in 2G mode listening for calls and texts. It still burned 20% of the battery overnight in stand-by.
Since doing a hard reset, if I repeat the second experiment then I find that overnight battery drain is now only 4% - so clearly some piece of software that I had installed prior to the reset was hammering the battery even in stand-by. Quite what it was, I'm not sure yet. (My current prime suspects are the task manager and 1% battery status icons).
If you're having battery drain issues then I suggest doing a hard-reset and then not installing anything remotely controversial for a day or two to see if that sorts out the drain. If it does, then you can start reinstalling things gradually to see what difference each one makes.

NeilM said:
Sorry, but it doesn't work that way
Bandswitch can definitely do 2 things- it can disconnect idle connections, which will reconnect when needed, but this won't switch the transport between 3G and GSM, and has little effect on battery life
Or it can be used to manually change between 3G and GSM, using whichever is selected for its current transport and then autodisconnecting if required. It is the action of switching to GSM which has the most impact on battery life, but there is no way to switch automatically between to 2 as it needs a phone radio off/on to execute the switch.
Poor 3G signal conditions will hammer the battery because the phone will continually hunt for the strongest signal and switch constantly between modes. If your 3G signal is less than 2 bars I'd suggest switching it to GSM until you are in a stronger signal area. Do this by going to Phone/Menu/ then scroll down to Band and from there switch between Auto and GSM. If that makes a difference then you could install a small utility to make the switch easier to access.
Click to expand...
Click to collapse
Oh, I misunderstood it then... thank you for clearing that up!

It's very interesting, to see the number of people who have battery draining problems. I have the french SFR ROM 1.44 and since the beginning found my battery life satisfying (I didn't expect long life, as my wife has to charge her iPhone every night).
My battery lasts in heavy use 24h (though it can go down to 18h when using internet by 3G/HSPDA for long period like 1h or more) and under "normal" daily use (checking e-mail regularly, 20 min phone calls, sending some SMS, 30 mins internet, 45 mins playing around / listening some music) around 1.5 days.
My settings are:
3G/HSDPA enabled
Weather update every 6 hours
Stock auto updates - every 8 hours
Bluetooth and Wifi off unless needed
Screen brightness - auto
Haptic feeback, Vibration - off
E-mail check: every 2 hours (POP3)

Faulty batteries? I think not....
Whilst I'm a master of google searching, I get worse results using the search facility on this forum than just using intuition.
Anyway, I just wanted to add my comments on battery life after owning a stock 1.43 phone from Vodafone UK. I was getting less than 8 hours life with everything on auto and making just a couple of shortish phone calls and a couple of quick browses. The rest of the time I was in standby and I thought that my phone was one of the worst out there. I had also installed Skype which I had running in the background which sometimes causes the phone not to go into auto-standby even though it would dim normally. I also noticed that I was in a very weak signal area and that my phone was constantly switching between 2G/3G/H which I understand can consume a lot of power. Also, I had stopped using wi-fi to see if that helped.
After reading a million threads, I decided to conduct an experiment last night. Usually if I charge the phone before going to sleep for 8 hours it is down to 70% when I wake up having been left in standby. So last night I disabled everything. Turned off 3G, data connections, My Location, Weather update, Stocks Update, FaceBook login, e-mail updates, Skype, bluetooth, wifi. In fact absolutely everything I could find that could be turned off except the basic 2G phone itself.
Guess what, I wake up 8 hours later... 96%.
16 hours later.... 81% with very light use.
Now I'm going to have to spend many days playing around with different settings to see which apps or functions are gobbling the power. I have a nasty feeling that the weak signal is half the problem
So cheer up! It's not ideal, but this is a brand new, smartfone with bugs - not a Nokia 6110. Higher capacity batteries and ROM updates will come. In the meantime you just have to figure out what is sucking up the juice on your HD2 and disable these functions if you don't need them or when you are not using them.
Good luck and enjoy it! The coolest phone around...
Rickster
Donations appreciated (That incompetent government and those reckless banks put me out of busines...)

Hello everyone,
like the majority of the owners of HD2, in order to optimise the duration of accumulator charge, I use Band connection control programs , to pass in 3G only when it is necessary. Thus, I have:
- phoneAlarm: to force the 2G mode the night, and also for differ quiet mode if I am in meeting, etc…. In particular, in the case which interests me there, I force the 2G the night and asks to pass to 2G the morning.
- WMlonglife (version for HD2): which normally loads himself to make the effective switch 2G towards 3G or 3G+ if an application program requiring it is launched, and otherwise to remain in 2G. It should be noted that WMlonglife has two applis, one for the configuration, and to make manually changes 2G 3G, WMbandswitch.
- recently, I tested Bandswitch v2.8
I meet the following phenomena, and I would like to know if others also have them, and/or if there are parameters to change so that it goes better.
Point A: Already some question about the icons of the bar of state in top.
There are always two icons side by side. Tell me if I interpret them well.
one with a letter: G= GSM, E= Edge, 3G = 3G, H = 3G+
This letter tellsonly that this kind of network is available, but it does not say that one is actually connected there. Is it well that?
To know in which mode one is actually connected, it is another icon, on its line, with the 1 to 4 bars of reception and a small letter, which should be looked at.
This small letter, it is “H " ==> connected in 3G+, “3G” ==> connected in 3G, “E” ==> connected in Edge
and finally a simple antenna, which I imagine wants to say that one is just connected in 2G, no data connection
Is what all that is correct?
Is there another mean of knowing in real-time the current mode of connexion (and thus mode of conso of the accumulator)?
Point B, use of Phonealarm:
like said in introduction, I force the 2G (mode GSM/GPRS) during the night, and to 6:00 of the morning, I pass it in mode “house” where I put “Car”, by also putting the pin number at it, because it seems that for this transition, one needs the pin number (is it the radio cycle on-off?)
There, the first thing, they is that every morning, when I unlock it I find myself with the screen for input of the pin number, where it is enough to make cancel (because the code already entered via PA and even already connected). Moreover, if one tries to enter a pin number, then he refuses the input.
on the other hand, at this time, the telephone seems to remain in Edge icon “E”, and does not pass in H. On the other hand, so there I reset, then he will connect to H with the boot
Have you also this history of pin number?
For hangs, it is as if WMlonglife did not take the hand to force a 3G mode or 3G+….
this brings me to the point C
Point C: WMbandswitch… after a software reset, my Tel. is connected automatically towards the 3G network (or 3G+) of orange. On the other hand the morning (after to automatic wake up through PA), it remains in E. When I test action manually a passage in 3G with WMbandswitch, it does not change anything. I tested with radio operator chip on Samsung, or Qualcomm (WCDMA). similar behavior….
To check out, I then loaded and installed Bandswitch 2.8, and tried to change into 3G, and there I see appearing the letter H. so, there is a difference with WMlonglife, which would seem to show that WMlonglife does not manage to make the switch towards 3G.
Which radio chip put in WMlonglife?
Have you to it even thing?
Poind D: use of bandswitch 2.8 (on xda): I tested. Hard to know if that is interfaced well with all the remainder. Of your experiment, which one would you advise? It does not have the system of “whitelist” like WMlonglife…
Here is, in synthesis, to summarise my questions
- Has: major significance of the icons
- B: phonealarm and switch of the 3G mode (after a forcing in 2G the night)
- C: WMbandswitch, and configuration/use for HD2
- D: alternative to WMlonglife?
For info, with normal use of browsing, email and phone, I drop of about 50% battery for 24h, that is not so bad, but I 'd like to make sure about the Bandswitch thing...
Thank you in advance for all…
vdelab

Battery life went from poor to awesome to even worse?

Bought my Xperia just over a month ago, and installed juicedefender and juiceplotter to help manage my power use.
At first, I did the whole charging cycle thing, and managed to get battery life up to nearly 20 hours after a week! In the past few weeks however, my phone barely lasts 10 hours now...the battery dies before I can get a chance to recharge. I am a heavy user, but that doesn't seem to explain the sudden drop in battery capacity.
Because of the drop in power over the last few weeks, I have set EVERYTHING to not update, and google sync has been set to sync every other day.
Will my battery just continue to get worse? or do I have a faulty battery?
don't get me wrong, I love my new phone...I just need to know if this is a typical problem, or if I need to get a new battery.
Thanks!

Hi - I'm getting about 40 hours out of mine.. I tend to switch mobile data off when I'm at home as I use wifi.. the problem seems mainly to lie with 3G.. so when I'm out and about I switch wifi off and mobile data on.. but I tend to keep to 2G (GSM) for background syncing etc.. and switch 3G(GSM/WCDMA preferred) on when I want to do any active stuff.. like internet browsing of using the XDA app... I also have my Wifi sleep policy set to "sleep when screen is off"..
What do you use your phone for? if you can tell me a bit about how your using your handset I might be able to give you some more specific advice.

Thanks for the fast reply!
I use juice defender to switch off 3G when the screen is off. It connects every 15 minutes, could that be the issue?
I've looked for a way to switch to GSM, but I can't seem to do it with my carrier(don't have the option in my settings).
I use a lot of data, up to 3 gigs per month 3G only(on average). 4 or 5 calls a day, and probably 100 texts per day. I keep my screen at around 25% brightness.

If you can't switch to GSM then maybe try switching mobile data off all together when you're not using it..(when travelling etc)... (far from ideal I know!).. but it might help.. I think that the 3G radio isn't sleeping properly.. the new software update which is due out anytime now MIGHT solve it.. but only if you're either on an unbranded handset (sound like you're not) or your carrier pushes the update through to you...
The other things you can try is to switch off "Search for updates automatically" in the phone settings... and switch of determine location by wireless networks (in the location settings menu)..

There was a thread about auto brightness causing constant cpu drain, leaving it autobrightness is thought to be battery kind`er.
Ive stopped using task managers and just use default android control and its good for my battery. I check the ram availability occasionaly and though it gets down to around 30 or 40 or meg it shows no slowdowns or hangups but I do reboot after charging every other night.

I'm experiencing similar behavior: poor, then good, then poor, then good again, of course with similar usage. I don't use any task killer and have 3G always on. I have tried 3 different batteries: the stock one, the one from my X1, and the 1800 mAh from Mugen: same pattern with every battery.
I definitely think that there's something bad in the design of the power circuitry and/or in the kernel.

Battery drain and 3G

G'day everyone,
I'm wondering if anyone has experienced a similar issue to what I'm having on my x10i.
I use to unplug my device from the charger around 7am (100% - fully charged) and the battery dies around 7pm. The main usage of my device is for making a couple of short phone calls, sending/receiving tens of SMSs, regularly checking my facebook, twitter and email account. Not a heavy usage I think, around 85% of the time is put on standby. I was really unsatisfied because my other device "HTC hero" stays for over two days. A few facts about my HTC Hero: 1) It is way much older and nearly damaged, 2) I am using it mainly for family/personal really long calls (30-45mins per call) and 3) Always connected to my car's built in phone system (Bluetooth is up all the time).
Since I bought my device 2 months ago, I was in a continues contact with SE the Middle East regarding battery issues. Honestly, they were very informative and respond quicker than any other company I dealt with before. They replied to me with really useful tips that extended my batter life to stay alive till the mid night (extra 4-5 hrs). Tips given were: Brightness automatic adjustment, Disabling auto Wifi detection... etc. Though, I was still not quite satisfied.
One day I decided to do my own experiments to observe the real problem with my x10 battery. This was 3 days ago. The first thing I started with, and apparently the last, was disabling the 3G service. I turned off the 3G service, and turned on the 2G (Edge) instead. Believe it or not, the first day my device's battery status was about ~85% when I got back home from work, ~70% at the mid night, ~55 percent when I woke up the next day, ~25% when I got back home, and dies around 8pm (from 17hrs to 37hrs). It was a straight shock to me. I already know that enabling 3G would shorten the battery life for both the short and long term, but honestly I wasn't expecting this much of difference in the daily usage. The other thing, I didn't notice any huge difference between before and now. Internet surfing is a bit slower, couldn't notice the difference. Twitter, Facebook and email worked just the same since I check them whenever I got notified. The last thing is I'm using mobile messenger now, i.e. eBuddy, since the battery is giving me longer time, and all my messenger accounts are on all the time.
Please, if you are having the same issue, let me know because I was assuming that there's something wrong on my device, either on the battery itself or the build software (build # R2BA024)
Regards

The improvements you're seeing are probably due to you living in an area with poor 3G reception. The poorer the signal is, the harder the phone has to work to maintain the connection, thus, eating battery faster.
Although, it shouldn't be THAT big of a battery loss... I'd look at what programs you have installed and running and see if any of them are secretly eating battery behind your back.

You should try installing and running "Data on demand" It switches your data connection off when the phones screen is off...

Its well worth upgrading to 026, i saw a huge increase in battery life from that.

iead1 said:
The improvements you're seeing are probably due to you living in an area with poor 3G reception. The poorer the signal is, the harder the phone has to work to maintain the connection, thus, eating battery faster.
Although, it shouldn't be THAT big of a battery loss... I'd look at what programs you have installed and running and see if any of them are secretly eating battery behind your back.
Click to expand...
Click to collapse
Absolutely correct. At home I can leave my X10 for days without it dying with 3G enabled. At work there are dead zones that'll suck a phone dry within an 8 hour shift though. It's almost always a coverage issue.
For any battery issue I suggest a factory reset and THEN make the appropriate adjustments. Sounds useless but sometimes you can emulate all the same settings and things still don't happen as anticipated.
Use a 3G toggle widget for long periods where you KNOW it won't be necessary. Root your X10 and add SetCPU to that bad boy. Screw using task killers because the Android OS is *nix based and handles memory just fine - I only kill tasks before putting my phone away when I know I won't use it for an hour or more. Other than that, don't use task killers, battery monitors or anything that'll keep your phone from sleeping. Use Spare Parts if you need help identifying an annoying program too.

Thanks all for the useful comments.
Now, I feel more confident that I can keep the battery alive for even more than 2 days. Thanks for your information and knowledge : )
[Q]: Is there any application that shows (in bars or digits) the strength of 3G signal?

The power consumption is huge

Yesterday, I was using the Google navigation on 3G network with the phone connected to a 500mA car charger. After 1hr, the battery dropped 20%...Anyone knows if a 1000mA car is enough??
Tonight, I was watching a Youtube HD video on 4G network (2/3 bars on 4G) with the phone connected to a 1000mA USB wall charger. After 10min, the battery dropped 2%...Well, even 1000mA cannot compensate the consumption of the battery.
The power consumption of this phone is ridiculous. Something must be wrong with the system/circuit design.
NOTE: I'm not complaining the battery but the power consumption of this phone. The charging cannot compensate the usage of the power. Think about a laptop. It's even more powerful, but you can use it freely without any concern about the battery as long as you plug it in an ac adapter. Why can't Epic 4G do this?

man i been seeing the same problems i was listen to the sprint radio while hooked up to the charge and would see it stay at the same percent for about a hr before it went up 1%. this battery issues is making me hate the phone right now and i cant find any rapid charge programs or settings for this yet. cant wait for some custom rom to come out that hopes to fix some of these issues

yup 4g is a battery hog which is why people are complaining about battery life,I suggest you turn it off, it's just not worth it IMO, which too bad cause we're paying extra afterall.

seven7dust said:
yup 4g is a battery hog which is why people are complaining about battery life,I suggest you turn it off, it's just not worth it IMO, which too bad cause we're paying extra afterall.
Click to expand...
Click to collapse
I saw a post this morning. The 3G even consumes more battery on Epic 4G during browsing. so we can expect even worse under 3G.

I'm on my third Epic and they have all had battery drain issues. Battery manufacture dates ranged from July to mid August. Right now actually, I'm streaming some radio over 3g and have an AIM client running in the background and the batter is slowly draining while plugged into the charger included in the box.
I have tried a factory reset just to be sure any apps I installed weren't affecting anything and still no dice. Even with running navigation in the car while plugged into a usb charger the battery will drain about 1% every 5 minutes or so. I'm probably returning the phone for good in a few days

This is with 4G disabled, using SwitchPro widget to enable 3G. I also have background updates disabled(under accounts/sync), I manually do them periodically.

fookxixi said:
Yesterday, I was using the Google navigation on 3G network with the phone connected to a 500mA car charger. After 1hr, the battery dropped 20%...Anyone knows if a 1000mA car is enough.
Click to expand...
Click to collapse
That shoul be more than enough. I use a Motorola-branded 850mA microUSB car charger (quite cheap on Amazon). On a recent day-long driving trip, it was sufficient to maintain the battery level while streaming audio over 3G and simultaneously running GPS tracking. I don't think a 500mA unit would have handled the load, however.

I'm really starting to think this phone is an epic fail. I get from 1.5 hours to 2 hours of use from a full charge! Thats with everything off, 4G, wifi, bluetooth, GPS. The sprint store manager wouldn't exchange my phone because he said their is nothing wrong with it. If it takes 6 hours to charge and then I get 2 hours of use, this phone is worthless to me!

syntax_erorr said:
I'm really starting to think this phone is an epic fail. I get from 1.5 hours to 2 hours of use from a full charge! Thats with everything off, 4G, wifi, bluetooth, GPS. The sprint store manager wouldn't exchange my phone because he said their is nothing wrong with it. If it takes 6 hours to charge and then I get 2 hours of use, this phone is worthless to me!
Click to expand...
Click to collapse
Yeah that doesn't sound right. I think most people would have a hard time making it last only 2 hours. Maybe gaming while running WiFi tether.
Keep in mind with CDMA, the lower the signal to the tower, the more power it takes to keep the connection active. For GSM this is less of an issue. How is the signal where you live?
An interesting side note. I plugged in my charger for my Bluetooth which is only 180ma and it went from 70% to "Fully Charged" in 10 seconds. When I unplugged the charger it went back to 70%. It really didn't like that low power feed.

Sorry if it came out orange. I used screenshot the app and that's what i got. Anywho, its a perfect combo what I've done. See the up time, nearly 15 hours up time. I only lost 35% of life during the time too as you can see how full the batt is.
Remedies: Autokiller set to extreme. ATK: Set to aggressive, with auto kill set to when screen is off. Interval every hour. Cachemate: all settings lit up, so it clears about 12-14 MB every hour or 1-2 every manual clear. Set CPU: Conservative 1000/100 with set to boot. Notice, set CPU resets itself every reboot for now, just make sure your good.
Then you should be good as I have for TWO days on one charge nearly 24 hrs ago.
Sent From The Moon

My battery has increased five fold with that evo fix after an hour and a half I've only used 6 percent of my battery

PlankLongBeard said:
Sorry if it came out orange. I used screenshot the app and that's what i got. Anywho, its a perfect combo what I've done. See the up time, nearly 15 hours up time. I only lost 35% of life during the time too as you can see how full the batt is.
Remedies: Autokiller set to extreme. ATK: Set to aggressive, with auto kill set to when screen is off. Interval every hour. Cachemate: all settings lit up, so it clears about 12-14 MB every hour or 1-2 every manual clear. Set CPU: Conservative 1000/100 with set to boot. Notice, set CPU resets itself every reboot for now, just make sure your good.
Then you should be good as I have for TWO days on one charge nearly 24 hrs ago.
Sent From The Moon
Click to expand...
Click to collapse
I would love to see more info/screenshots on this. The one SS you included somehow ended up thumbnail sized only. 2 days is nuts, anything over 24h would be.

hey guys
I've been really happy with the battery life on my epic - I get about 12-14 hours with on-off use, 4G off. My battery is sitting at about 35% after playing a bunch of games for about 3 hours in between classes and it has been running off battery for about 8 hours, browsing the web, sending texts and downloading apps on both 3g and wifi.
I'm using Advanced Task Killer and its set to kill aggressively every half hour - it kills all apps except Juice Defender, itself and LauncherPro.
I'm running LauncherPro - if that matters - doubtful, but I didn't like touchwiz. And I'm running JuiceDefender on default settings. Basically it kills the 3G radio when screen is off unless its transferring > then 15kbs of data. The normal radio remains on for calls/texts.

lv2bll said:
My battery has increased five fold with that evo fix after an hour and a half I've only used 6 percent of my battery
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What is the EVO fix? I'd love to try some extra tips.
My two cents - a typical day puts me at home and at work for the majority of the day and night, which both have wi-fi. I've turned off "look for open networks", "never allow wi-fi to sleep" and I leave wi-fi on. After a full night of charge I took the phone off of the charger at 11am on Saturnday and it finally turned off Sunday at 8pm - 33 hours is pretty darn good, almost two days. However yesterday I took the phone off the charger after leaving work at 6:30pm (so no wi-fi, just 3G) and in just an hour with watching a 15 minute long normal quality YouTube video, a few texts and a short phone call I was down TWENTY PERCENT. What the heck.
Over wi-fi, like I said, I'm good - great battery life since I'm not waking up the 3G radio to do anything. But when I get out of those wi-fi areas that's when my battery starts to drop. Anandtech is getting similar results with awful 3G battery:
http://www.anandtech.com/show/3891/samsung-epic-4g-review-the-fastest-android-phone/8
Something is wrong with the 3G radio, and I hope Sprint & Samsung seriously do something about it.

You guys are all failing to look at "Cell standby" details.
Time without signal on this phone - no matter WHAT coverage area you're in - is ALWAYS > 50%. This is bull**** and a Samsung software issue. Take a look for yourself.

oxeneers said:
You guys are all failing to look at "Cell standby" details.
Time without signal on this phone - no matter WHAT coverage area you're in - is ALWAYS > 50%. This is bull**** and a Samsung software issue. Take a look for yourself.
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I never had a problem with but I've been reading many having a problem with "Cel Standby" going out of control. Mine it at 17%. Highest I have saw it was in the upper 30's range after a full day (14hr)

Just an update on my usage from Pg.1:

oxeneers said:
You guys are all failing to look at "Cell standby" details.
Time without signal on this phone - no matter WHAT coverage area you're in - is ALWAYS > 50%. This is bull**** and a Samsung software issue. Take a look for yourself.
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I am not seeing this issue. Never seen it above 3%. Besides most of the battery is going to the screen it seems. I am actually wondering if it reporting the usage correctly. If the screen was really take that much of the power, it should be lasting a lot longer.
People getting great battery life are reporting they are using task killers and data connection blockers. That isn't even where they majority of the power goes. The system tells us it is going to the screen. Not the tasks or data connections. It seems counter-intuitive.

oxeneers said:
You guys are all failing to look at "Cell standby" details.
Time without signal on this phone - no matter WHAT coverage area you're in - is ALWAYS > 50%. This is bull**** and a Samsung software issue. Take a look for yourself.
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Click to collapse
Turn airplane mode on then off. (settings -> Wireless & Networks)
This will solve the problem until the next time you reboot. You must do this after every reboot.

I'm working on a more scientific breakdown of power consumption. But here are some brief findings.
The highest power consumer is the display. Even on the lowest brightness setting it consumes more power than a normal LCD (I'm comparing it to my Evo). If the display is only showing a black background it is lower power, but then again if all it is showing is noting, it may as well not be on at all. If you actually want to display something on the screen, it consumes power like it's going out of style. So much for Super AMOLED being a power saver (total and completely false.)
The next highest power consumer is the 3G radio. Under similar circumstances (similar signal strength) the 3G radio is consuming more power than the 4G and Wifi radios combined. Wifi seems to consume the least, followed by 4G then 3G. This is crazy and if not fixed might be unacceptable.
Next is background apps, most specifically anything that uses the network (email syncing, social networking and location reporting services like latitude) being the worst. The sync settings on the Epic are not as robust as the Evo and I've struggled to gain control of gmail without just setting it to manual only. Do not use latitude and although some will speak out against task killers, having one to keep "maps" at bay is worth it alone.
Then there are more obvious things like live wallpaper. Or specifically anything using the CPU / GPU and GPS.
More to come, but right now, something must be done about the 3G radio and GPS or this phone could live up to the moniker of Epic fail. I really hope Sprint and Samsung are doing something because otherwise if the phone worked as it could, it would be awesome.