Discovery about battery drain - Acer Iconia A500

- I discovered that if you are online the battery is not drained a lot during sleeping mode (about 1% for 8 hours)
but if your are CONNECTED to your wifi spot and not have internet connection then the drain will increase by 20 times... (20% for 8 hours)
I use at home a wifi hotspot require to be logged in to can go online, and I forgot to log in last time.... then I saw my battery goes drained faster than normal.
go to sleep : 75%, wake up after 8 hours 55%... I was very surprise, I thougth that was the kernel (I ve just updated from 1.11 to 1.2 thor) but after checking I see that wasn't the kernel but just the fact that I forgot to login to the hotspot..
So
- if you let wifi on always, be sure the internet works properly else your battery will be drain
- if you cut the wifi before sleeping well nothing more have to be done
the fact also is the battery is not drained by let the wifi on always, if you are not browsing or downloading, the drain is really really low...

.....what?

officetally said:
.....what?
Click to expand...
Click to collapse
What is there not to understand? I thought it was clear enough.......

i just did 48 hrs on with 4-5 of use...wifi is set to go off when tabket does. (After a min) ...so I guess this is not good?

Iconianoob11 said:
i just did 48 hrs on with 4-5 of use...wifi is set to go off when tabket does. (After a min) ...so I guess this is not good?
Click to expand...
Click to collapse
you can set the wifi behavior in settings, mine is set to never goes off.

no ryhme or reason
sanaell said:
you can set the wifi behavior in settings, mine is set to never goes off.
Click to expand...
Click to collapse
Mine is set go off when screen times out. I do not think that always happens. Sometimes I hear notifcations even though the screen is off and wifi isset to go off when the screen does Other times i see a significant baterry drain after a few hours sleep

so never sleep is better than off with screen? Just trying to make sure I understand

never off but connected to wifi with internet connection = low battery drain
never off but connected to wifi without internet connection = high drain 20 times higher than previous
for me doesn't see big matter between sleep off wifi and sleep on wifi.

sanaell said:
- I discovered that if you are online the battery is not drained a lot during sleeping mode (about 1% for 8 hours)
but if your are CONNECTED to your wifi spot and not have internet connection then the drain will increase by 20 times... (20% for 8 hours)
I use at home a wifi hotspot require to be logged in to can go online, and I forgot to log in last time.... then I saw my battery goes drained faster than normal.
go to sleep : 75%, wake up after 8 hours 55%... I was very surprise, I thougth that was the kernel (I ve just updated from 1.11 to 1.2 thor) but after checking I see that wasn't the kernel but just the fact that I forgot to login to the hotspot..
So
- if you let wifi on always, be sure the internet works properly else your battery will be drain
- if you cut the wifi before sleeping well nothing more have to be done
the fact also is the battery is not drained by let the wifi on always, if you are not browsing or downloading, the drain is really really low...
Click to expand...
Click to collapse
The above underlined is the equivalent to having cellular/data searching for a network...etc
ie. as with my Nexus One ( Android phone )
At my work, due to interference, I cannot received a cellular/data connection.... if I leave it on ( cellular/data )... it spent times searching & searching until it gets a signal....and if you have something that need syncing, it add to to drainage multiple times...therefore.... faster battery drain then if you do have a data connection. ( I usually have it on airplane mode where I know that I won't get a signal. )
I have tested this theory and proven it numerous times in the past while trying to make my battery last longer with my phone ... our A500 is the same when it comes to Android and battery lasting
You have a kinda weird HOME network setup ?
Most people set their HOME network with a key and get connected with the key & devices remember them... why bother with a login ?... I guess some people won't even trust their own network... LOL

Common in thailand to have a hotspot setup, since it's expensive to install internet private at home, require open a phone line, then pay a fee, then install the DSL line and pay another fee, and pay monthly fee... and also if I want change apartement that makes things much more easy... just leave and go, no need to think about closing line or else
I do not have internet inside my apartment... It's a shared hotspot provided for the whole building.
need to manage users and duration to bills the peoples.
If I had choices I will have my own private internet connection.

yeah from what i read your tab is searching for the network all night, that will drain your battery fast. As you said either login in or turn off wifi.

sanaell said:
Common in thailand to have a hotspot setup, since it's expensive to install internet private at home, require open a phone line, then pay a fee, then install the DSL line and pay another fee, and pay monthly fee... and also if I want change apartement that makes things much more easy... just leave and go, no need to think about closing line or else
I do not have internet inside my apartment... It's a shared hotspot provided for the whole building.
need to manage users and duration to bills the peoples.
If I had choices I will have my own private internet connection.
Click to expand...
Click to collapse
That explains things a lot more clearly. I don't think that's a particularly common setup outside of Thailand though, especially in the US and Europe. We tend to have our own internet connections so such logging on just isn't needed. I, for example, have a 50mbit always on cable connection with my own hotspot.

Related

How long does your battery last with internet on 24/7

hey guys. i just wanted to know on average, how long does your battery last with either 3g or edge on 24/7. from what i been experience, after a full charge with edge on, i make one phone call and my battery drops to 90%. after that, from morning till night time, it drops to around 30% at around 6pm with minor activities. so i just want to know how long does your battery last for all you internet users.
My battery lasts about 72hours if only bluetooth is activated and EDGE/3G is used and I use it "normally"(read a few emails and a few phonecalls).
I don't believe EDGE is ever always on...
I use WiFi almost the entire day while I'm in my apartment doing work and constantly getting important emails. My battery could probably go 48 hours but I charge it every night.
THESpideyWVU said:
I don't believe EDGE is ever always on...
I use WiFi almost the entire day while I'm in my apartment doing work and constantly getting important emails. My battery could probably go 48 hours but I charge it every night.
Click to expand...
Click to collapse
ur right its not always on. however, i have few programs that is set it to connect every 20 mintues, so lets say i do get disconnected, it will reconnect and refresh.
Yea I understand. I'd say if your battery isn't lasting all day with minor usage, something's up.
something between 24 and 48 hours, depending on how many phone calls i make and if WiFi is on or not.
usually i talk a bit on the phone, 24/7 Internet through Edge/3G and Push Email enabled i get 40 hours.
my battery life
my battery lasts for 14 hours i hear mp3s on bluetooth headset ,i use 3g couple of times check my inbox or so... wireless s used for 30 mins and 2 hours phone calls and some snapshots using the cam
When browsing ALOT through the day less than 24 hours.
Using often Opera Mini 4.2.
With Opera Mobile 9.5 even less (much more data).
I never keep my internet connection open constantly, always turn off after using.
I've been using CSD to browse the net for the past 4 hours. the screen barely ever turned off during this time. I'm down to the last bar of battery. does that sound reasonable?
Sfkn2 said:
I've been using CSD to browse the net for the past 4 hours. the screen barely ever turned off during this time. I'm down to the last bar of battery. does that sound reasonable?
Click to expand...
Click to collapse
seems reasonable enough. when im at work, screen barely goes off since im always using palringo to chat with my buddies hehe
but yea, after a few hours of usage straight, im usually down to about 40%
The phone only draws power when sending or receiving, more so when sending. Just having the 3G/3.5G connected on idle does not use a lot of power.
korval said:
The phone only draws power when sending or receiving, more so when sending. Just having the 3G/3.5G connected on idle does not use a lot of power.
Click to expand...
Click to collapse
Doesn't it eat up the battery if 3G is constantly on, since it is trying to receive a signal to keep alive the connection? Similar to the regular phone connection?
My data channel had been on for 43 hours when I checked this morning. That is GPRS though, not HSDPA/3G. The phone was still showing 20% after almost 2 days.
Battery use with HSDPA though is much shorter, like 12 hours or so.
ZenithUK said:
My data channel had been on for 43 hours when I checked this morning. That is GPRS though, not HSDPA/3G. The phone was still showing 20% after almost 2 days.
Battery use with HSDPA though is much shorter, like 12 hours or so.
Click to expand...
Click to collapse
how do you check how logn our connected? mine doesnt show. i remember back then when i had my tytn 2, it shows the time.
Tap the signal strength icon and it should tell you how long your data channel has been connected. In my case, right now it says:
mobile web (GPRS, 3G) 06:05:10
ZenithUK said:
Tap the signal strength icon and it should tell you how long your data channel has been connected. In my case, right now it says:
mobile web (GPRS, 3G) 06:05:10
Click to expand...
Click to collapse
yea i know thats what i did when i had my tilt. however, on my x1, it just says connected, no time, and no disconnect button.
Question
I have an iphone, and I only use it for email, because I can leave wifi enabled, and it will connect and check every so often, the wifi goes off when its "sleeping" but will switch itself on to check for email.
My question is, with my xperia, if I leave my wifi enabled and put it to sleep, will it still disconnect/connect if/when it needs to and still give a decent battery life?
So far I keep it off and don't even use it for email, but if i can get similar behaviour and battery life to my iphone (giving me almost a week with wifi left on, not being used for anything else) then i can ditch the iphone and just use my xperia.
My only other option was to take out a data plan add-on, i like having my emails checked regularly for me and being notified, but when i tried it on my second day of owning my xperia, it killed hte battery in under 3-4 hours.
Any suggestions, comments, etc?
Thanks.
bknewtype said:
yea i know thats what i did when i had my tilt. however, on my x1, it just says connected, no time, and no disconnect button.
Click to expand...
Click to collapse
Use Advanced Config to get this option enabled
I am connected to internet 24/7 with HSDPA
Loading web pages here and there around the day, syncing email evey 30 mins, BT 24/7 with MBW-100 watch and my car, WiFi occasional to move files around my work network and home, GPS 1 or 2 times a day, and heavy, heavy phone usage with some videocalls
I even share the SEX1's internet to my desktop computer because it's faster than ADSL
At the end of the day I still have 30-10%
I would say 36 hours of battery life
When I used the Diamond I had to recharge at lunch, TyTn lasted until 3-5 pm
BETTER phone I've ever had, by far
PS: battery drains very fast when sharing HSDPA internet to the desktop PC with WMWiFiRouter, so I prefer USB sharing when at office
always on doesn't mean anything if there's no active data transfer. It's the data transfer that's consuming power, not the fact that your 3G or GSM network is turned on.
For e.g. my phone is connected to internet 24/7 due to my pushmail setup, I do get mails pushed to me, but when it comes to night, since it's off-peak period it's pushed to me on hourly basis. Battery consumption will be around 10-20% over night, but could be less than 10% if I turn off pushmail.
If I were to continuously stream video off from my ISP provider's online TV channel, I would get about 5-6 hours of playback time (I think, since it was awhile since I last do that, can't last full day for sure)

WiFi or 3G, which eats more Power?

i use WiFi @ home and work, 3G everywhere else.
my battery was over 50% before bed, woke up with am with 5% left.....
so 45% of my battery life was eaten up in 8 hours with NO use?
any thoughts?
Wifi seems to be a real battery eater on this device (along with GPS). I leave it switched off unless I'm actively using it, and have no problems with battery life (it would last >24 hours if I let it.. I charge overnight though).
As there's no 3G switch on the widget I don't ever switch that off so haven't seen what improvement that would give. Cell Standby is still the largest user of battery, so maybe it would.
Set wifi to sleep when screen turns off.
There's an option for that? Not seen that one..
muncheese said:
Set wifi to sleep when screen turns off.
Click to expand...
Click to collapse
I didn't know you could do that, however, i already have that option selected....after i found it in the menu.
i guess i'll just have to experiment and see if 3G saves me power over the weekend.
Yeah I am pretty sure that option is the default. It still definitely drains more power with the WiFi enabled than without, sleeping or not. Not sure vs 3g, I disable or enable both as I need them.
I thought Wifi drains very little power ... with my phone on airplane mode and wifi only, the battery lasts over 30 hours with Meebo on, push e-mail on, and e-mail sync every 15 min.
Likewise, I have gps/wifi/2g/screen widgets on my main home page.
This doesn't exactly apply to the OP, but there's a nice app called "Y5 - Battery" in the market that switches off the WiFi radio in areas that you usually don't use WiFi.
Also, you can see what's draining your battery if you go to Settings > About Phone > Battery Use. There's some cool graphs showing where all your battery went since the last charge. Maybe you have a program that's running in the background that's sucking up all your battery.
I have had some battery drain issues since I received my N1 3 days ago. I found that Android 2.1 has a nice battery log (/d/battery_log) which updates every 50 - 55 seconds. In doing some tests to see what was killing my battery I can tell you that it isn't WiFi.
I would say that when in use, 3G draws a bit more than WiFi when actively used, but when WiFi is just idle it seems better than when 3G is connected and not in use.
In case anyone cares...I am still isolating all of the battery drain issues, but one of the biggest I have eliminated by uninstalling seems to be from BeautifulWidgets. I found it hard to believe, but my testing seems pretty clear. I also have a decent draw whenever I'm in the car with Bluetooth sync going. I would have had a hard time confirming this without this battery log file.
Wifi is extremely power efficient on this device.
I use the device on at&t edge and have the wifi turned on all day. the battery drain with pus email i about 4%/hour.
I think the combination of wifi PLUS being on an HSDPA network is killing your battery.
pus email? sounds gross
A quick calculation gives me 2.4% an hour, and that's with sync on, Wifi off, 3G on and using the phone a bit (not so much today). That's consistent with what I see normally - if you never actually used the phone you could push 3 days out of it.. but of course there wouldn't be much point in having it switched on then so it drops to about a day after a bit of driving w/bluetooth on, streaming music, etc.
Of course it's not really productive to look at battery life as 'how long can I make this last' (although knowing I can theoretically push it to 3 days plus is going to be useful on holiday). You work out your average day.. say up at 8am, turn in at midnight, so that's 16 hours actual time that it's needed (assuming you charge overnight like most do) - then fiddle with the settings based on your own use so you hit that comfortably. I'm probably being overconservative right now.. I'm finishing the day with nearly 50% battery left & need to ramp it up a bit Maybe a few more games of Frozen Bubble..
http://www.google.com/phone/static/en_US-nexusone_tech_specs.html
According to the Google spec sheet:
Power and battery
Removable 1400 mAH battery
Charges at 480mA from USB, at 980mA from supplied charger
Talk time Up to 10 hours on 2G
Up to 7 hours on 3G
Standby time Up to 290 hours on 2G
Up to 250 hours on 3G
Internet use Up to 5 hours on 3G
Up to 6.5 hours on Wi-Fi
Video playback Up to 7 hours
Audio playback Up to 20 hours
I'd love to see someone get 12 days of standby!
The specs for mobile phones are always a bit of a fiction.. maybe you could do that if you put it in airplane mode and if you never activated the display at all...
I had a Sony Erricson that claimed 800 hours (over a month!) of Standby. Never got it over 2 days..
Would be interesting to see if anyone has managed 10 hours or even 7 hours of talk time... personally I doubt it.
TonyHoyle said:
I'd love to see someone get 12 days of standby!
The specs for mobile phones are always a bit of a fiction.. maybe you could do that if you put it in airplane mode and if you never activated the display at all...
I had a Sony Erricson that claimed 800 hours (over a month!) of Standby. Never got it over 2 days..
Would be interesting to see if anyone has managed 10 hours or even 7 hours of talk time... personally I doubt it.
Click to expand...
Click to collapse
Some phones in Airplane Mode when not used can do those kind of numbers though. My K800 lasted about 2 weeks in standby when running like above. Though that just proves how pointless such numbers are.
So when using wifi, is 3g auto turned off?
galaxys said:
So when using wifi, is 3g auto turned off?
Click to expand...
Click to collapse
I would assume the data aspect is, but the 3G voice is still active, even with WiFi on.

Battery life and idle data connection

Did anyone try to compare battery life between no data connection and idle data connection?
I always turn data connection off after update, but I am asking how does idle data connection effects battery?
I know it drains it...but how much?
And the reason I don't know results from myself...
Sometimes my battery drops from 100 to 90 or less over the night, sometimes from 100 to 80 or even more, with the same usage or any usage at all...so I don't know how to compare it because it's so random...and this is without data connections, it is only device with phone on in sleep mode...
I once compared an over night-drain where no connection took 3% of the battery and with data connection 4%. Approx 8h sleep
It's hard for me to compare during normal use since my usage varies a lot from day to day. So I have nothing to contribute during daytime usage.
umiss said:
I once compared an over night-drain where no connection took 3% of the battery and with data connection 4%. Approx 8h sleep
It's hard for me to compare during normal use since my usage varies a lot from day to day. So I have nothing to contribute during daytime usage.
Click to expand...
Click to collapse
I was using wmlonglife for some time, however one time it stops to work - i have found that i had a permament data connection in idle, but didn't notice a thing, so technically it do not drains the phone dramatically
when you guys say "idle" data connection, is the phone not automatically checking for email accounts etc? If not have you disabled them overnight - how do you do that please?
From yesterday until today, until now, I left idle data connection and it dropped in 12h from 80 to 75.
When I tried to close connection and left it overnight it dropped from 100 to 93.
By my expirience there is difference in battery drain: 15% with idle data connectino and 7% without data connection.
But numbers change from day to day...but more or less is 2x more when i have data connection on idle
might have to do with the network.. most networks do their work at night because they seem to asume everybody is asleep.. it could be offline every now and then but keeps searching for updates..
Mine has 3g toggle turned off, but the 'data connection' toggle is always on, i have three email accounts that get checked over edge every 2 hours, and battery drops roughly 2% during 7 hours sleep.
yuo have 3g off permanently or just overnight?
What do you "lose" when using 2g vs 3g?
My options about 3g mode is set to auto, so I guess it switch to 3g or hsdpa when available...
wigwam12 said:
yuo have 3g off permanently or just overnight?
What do you "lose" when using 2g vs 3g?
Click to expand...
Click to collapse
yea 3g permanently off. I live right on the edge of my local 3g coverage, and with it on itchews through the battery as it switches on/off/on/off. I get full reception using edge which is easily fast enough for surfing low bandwidth sites(like xda dev! ) twitter and emails etc.
my HD2 drains battery VERY fast when i have idle connections. when i don't turn them off my phone battery is from 100% to empty in about 6 hours.. but maybe there is a problem with my device / rom.
i hate to use your thread for topic for this but maybe anyone can help me with my battery being empty so fast? i am using Dutch stock rom v1.66 with standard radio rom. i am going to try a newer radio rom tonight. but i dont think that is going to help mutch.. i dont mind flashing to a custom rom but i want the same user interface as i now have. i dont like the custom one's with their shiny buttons and stuff..
would really apreciate help / advise!
samsamuel said:
yea 3g permanently off. I live right on the edge of my local 3g coverage, and with it on itchews through the battery as it switches on/off/on/off. I get full reception using edge which is easily fast enough for surfing low bandwidth sites(like xda dev! ) twitter and emails etc.
Click to expand...
Click to collapse
Thanks. I think the most bandwidth site I would currently access is Facebook.
I will try 2G then. When I get more into using the phone as an internet device I guess I could turn it on.
Mind you in the middle of a major city and moving from Voda "excellent" to "very good" signal zones it should stay 3G most of the time not switch so often......
the rom i.m using makes it easy to manage data, left soft button on home screen brings up comm manager and all the toggles have been activated, takes moments to switch on/off 3g and wifi, the rest of the time the edge data just works fine.
incidentally, in terms of power use other things to look at that might get overlooked, block size on sd card, if its real small and you have lots of sd card access, such as progs installed there, browser cache there, can significantly increase the number of read writes to the card in any given time period, costing power.

those with 30-40 hrs on one charge...

How do ya do it?
at most ive gotten bout 20
MINIMAL use (I.e. no browser).
Yes, anyone getting that much battery is running minimal services with < 10% wake time.
I usually get about 14 hours.
I keep my brightness on auto,
surf the web randomly,
I don't turn off auto-sync,
I watch videos, stream Pandora to my car stereo over Bluetooth,
sync 2 email accounts,
send and receive about 20 texts a day,
my facebook and twitter widgets sync once an hour and sometimes I manually sync them in between,
my Tech-Buzz widget syncs once an hour,
Beautiful Widgets syncs once an hour,
I use whatever wallpaper I feel like using on any particular day(some people think black saves power),
On some days I use Navigation and that knocks my usage back by an hour or two if I don't plug it into the car charger while using it.
I refuse to cripple my phones capabilities, or sit it down all day just so I can say I get 30 hours of battery time. If I need more than 12-18 hours, I have 3 spare batteries ready to go.
Disclaimer: DI8 has really reduced my battery life, however I still can get 2 days if I stretch it, and am *always* at around 70% at the end of a normal day. On my last charge before DI8 I was still at around 50% after 36 hours, with normal use.
What I do:
* Wi-fi always on, never sleep
* 4G off unless I know I'm in a 4G area, then on (it stays off anyway if I've got wi-fi)
* GPS off
* DRM and all other non-essential services off
* Screen brightness 1 or 2 ticks above minimum
* Kill only apps that I know are hogs (Google Nav, for example), leave all others alone to do what they want, use ATK as little as possible
* Airplane mode workaround for TWS
I also just don't use a lot of apps that I know are going to potentially prevent the phone from sleeping or otherwise hog up the battery if they happen to start up in the background randomly. I just don't have apps like that. Some people install all sorts of weird crap on their phones that does god knows what, I generally will only install stuff where I know exactly what it does. I also don't run a lot of widgets that check stuff in the background, although I do run Twitter and Facebook.
I am sure I don't use my phone as much as some people here, but it's wrong to assume people who get good battery life just don't use their phones. I make no real attempt at not using my phone; I use it whenever I want. That includes making calls, browsing the web (with one of three browsers), sending text messages or writing emails, using navigation in my car, and playing games.
Of all the things I do with my phone, the only thing I've noticed really super-killing my battery is GPS and navigation. That burns the battery at a rate of about 20% per half hour, which is about as long as I normally use it. But even if I use the GPS for an hour in a day, I can still get about 24 hours out of the battery if I need to.
I'm convinced wi-fi still really helps, and I'm set up so that *most* of the time I have wi-fi. I have wi-fi at home, at work, and actually on most of my route to and from work (my cable company has free wi-fi if you're a cable subscriber). I don't know how good my battery life would be if I didn't have that.
I use to get 20-25 hours easy, now I'm lucky to get maybe 8-10
daazncandyman said:
I use to get 20-25 hours easy, now I'm lucky to get maybe 8-10
Click to expand...
Click to collapse
Same here. Using stock DI18, rooted, mixup kernel with ondemand setcpu and juice defender (it was 5 hours b4 juice dfender installed.
Turned off the DRM service, automatic brightness. That's it. Stock everything else!
I've got GV and talk always on.
I"m a light user; sent 50+ text messages, occasionally check my email, and push email every hour.
At 40% battery life I have 2 days of battery life.
In the background I have
5 essential stock services running
digital clock wdiget
voicemail
email app
switchpro widget
My running time is 5.5% (lol), with display on 2 hours (auto-brightness), 3G on 10 hours, wifi on for the remaining time (Wi-fi policy never sleep), and TWS 0% (airplane mode trick).
Also, if you run wifi make sure you set the sleep policy to never. I'm using the DI18 update and when I turned my phone on I saw the 3G icon in the notification bar when there should be the wifi icon. Setting the wifi sleep policy to never will stop the phone from using 3G when the screen is off. NOT fixed in the DI18 update.
Attached my wallpaper lol
what exactly does wifi never sleep do to save battery ? also I seen it mentioned on a dif site, set it up that way and when the phone went off it appeared the wifi did also .. idk need a lil insight on that whole setting
dumpringz said:
what exactly does wifi never sleep do to save battery ? also I seen it mentioned on a dif site, set it up that way and when the phone went off it appeared the wifi did also .. idk need a lil insight on that whole setting
Click to expand...
Click to collapse
Normally, wi-fi uses a lot less battery life than 3G, so sometimes you want to use wi-fi and not 3G.
You set wi-fi sleep policy to "never," so that when you have wi-fi turned on and the phone goes to sleep, it won't turn off the wi-fi and turn on 3G. So the phone only uses wi-fi and "never" switches to 3G.
You have to manually change this in the advanced settings.
I don't know if it's something I downloaded which is eating my battery. I guess I'll try to do a hard reset, if that doesn't solve it, time to root
I can't get more than 8 hours on this..any suggestions to increase it?
I never get to 10 hours but I use my phone constantly. I on average use two batteries a day. I believe I should get the most out of my phone, I am paying the monthly fee, why restrict myself cause my phone will have a dead battery, I always carry a spare.
Sent from my SPH-D700 using XDA App
Coin Slot said:
I never get to 10 hours but I use my phone constantly. I on average use two batteries a day. I believe I should get the most out of my phone, I am paying the monthly fee, why restrict myself cause my phone will have a dead battery, I always carry a spare.
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
Same here, I got 2 batteries off of ebay so I use the hell out of my phone. Brightness is on max to show off that screen, stereo bluetooth and pandora,4g is always on, live wallpapers and browse internet and play games a lot (angry birds mostly) . Battery lasts me 7 to 8 hrs which is amazing based on how much I use it. If u are doing normal use and getting 8 hrs then something is wrong, ur maybe not in 4g and 4g is ona nd ur wasting batt looking for signal oor something else. Maybe u have a service running in the background. I removed media hub and drm bc I heard they run a lot, but I never did a proper b4 and after comparison so not sure if it actually does help. I'm using noobs andromeda rom and d18 update.
Sent from my Epic 4G
Id be SO happy if I could even get 6 hours off one charge.
I'm lucky to get more than 3hours these days from 100 to 15%. :\
I did have a lot of widgets, but I removed a majority of them. I NEVER have wifi, 4G, GPS or sync on. My brightness is always set to 0%.
I guess I just use the phone too much! I don't mind because I usually am able to get near a wall outlet to charge my phone in the middle of the day.
But I'm worried about tomorrow, where I'm leaving at 8am and not getting back till 6pm with NO ACCESS to any wall outlets. I'm pretty sure I'm not gonna make it. Lol.
posted from a EPIC4G.
I'm convinced that with regular use you are gonna get 8-10 hrs on a full charge. Hell by 8 hrs you are going need to start charging unless you want to wait until the phone dies so you can claim x amount of hours.
There is no point in turning off everything on your phone and barely using it to say it lasts 20 hrs. Get a charger for work, home and your car. It is what it is.
I wake up at 6am, charge by 2 pm when battery is around 30%.
the problem with this phone bottom line is that 3g is eating the battery life. I set wifi to always on and I'm always on wifi in the house. I can get 12-14 hours sitting in my house. whoopie doo. Thats not hte point of the phone, the point of the phone is to have mobile service, not wifi service. anyone that is getting 30 hours out of the phone is using wifi. So thats not even a fair comparison. I love the phone, but this is just stupid, I shouldn't have to carry a spare battery with me if I go to the daytona 500 from 9am to 9pm.
robl45 said:
the problem with this phone bottom line is that 3g is eating the battery life. I set wifi to always on and I'm always on wifi in the house. I can get 12-14 hours sitting in my house. whoopie doo. Thats not hte point of the phone, the point of the phone is to have mobile service, not wifi service. anyone that is getting 30 hours out of the phone is using wifi. So thats not even a fair comparison. I love the phone, but this is just stupid, I shouldn't have to carry a spare battery with me if I go to the daytona 500 from 9am to 9pm.
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Click to collapse
Yeah 3G does eat more battery life than wi-fi but that doesn't mean you can't have great battery life with 3G on all the time. I can get 1-2 days with 3G on and with light use, but that's in part because I get a good 3G signal.
I probably emphasized too much on wi-fi but the point I'm trying to make is try to avoid using a weak connection. Generally, I use wi-fi/3g/4G in my home but inside most buildings they'll most likely have weak 3G and 4G connections, so I use the wi-fi network inside the building.
You said you could get 12-14 hours with wi-fi and not touching the phone? I'm not trying to be rude but that seems really low. If mines idle on wi-fi in my home it lasts days. With 14 hours idling, that means the battery life drops 7% every hour. Idling on wi-fi I think it should only drop 1-3% per hour.
Mind if you go to settings -> applications -> running services and post what you have?
i get twenty four hours on average a full day so to speak wake up it says fully charged i take it off check twitter and facebook leave the house and dont touch it until i am at school bored in class lol and then it says 95 after a full day of class it usually says 66 thats after 9 hours i go home play with it download apps etc make several calls and i text alot all day by the way and then i go to work and it says 50 or about 48 usually i use it all night off and on til i get home at seven my wife kills the battery and puts it on the charger while i sleep usually about 9

Battery Drain from WiFi

I'm sure there are others who have experienced this problem. Even though I show no wake locks my phone drains at an unacceptable rate while on my Wifi at home. My phone can have a 60% battery when I go to bed, and be almost dead by the time I get up. The only clue that shows up in Android System Info or Spare Parts is network usage by '0' which is something with root access.
This is happening regardless of Rom. I've tried stock, Syndicate Frozen, Urban Fury, Bonsai, Stock Plus, and maybe another I'm forgetting. They all drain the crap out of my battery with wifi on at home so obviously this isn't a rom issue.
This leaves me to believe that either something on my network is forcing data to my phone keeping it from deep sleep, or the router itself is the cause. Turning on my phone to 3G, my battery life is spectacular overnight. It deep sleeps like it's had a case of beer with a bottle of nyquil as a chaser before bed. 1% an hour.
So, I've ordered a different router to see if that's the issue. I've googled my current router which is a D-Link DIR-655 and seems like others have had similar battery drains using that router but no one can emphatically say it for sure is the router. Guess we'll see when the new router arrives if it is indeed the DIR-655. Otherwise the next step is disconnecting everything else that is connected to my network (3 computers, 2 printers, XBox, Wii and a Blu-Ray player. I just wanted to point out to anyone else having issues with wifi and weird battery drain, that it may not be the phone that is the problem.
I too have massive battery drain when using Wifi. It doesn't matter what Wifi network I'm attached to (work/home/friends/etc), I burn about 10% + per hour on idle; whereas on 3G is burning only ~2%/hour on idle. On stock, Wifi was my battery saving grace.
I've just given up on using Wifi for daily use. I use 3G for everything now.
I hope the newest version of SFR (whatever the new one will be called) will remedy this problem I have. I haven't posted about it in the rom thread since I had a feeling it was just my phone or another bad flash in CWM.
I've been using that OS Monitor app to try and find the problem. On 3G all the network interfaces have static receive and send amounts as long as I'm not doing anything that requires data. Connected to my home wifi, there is a constant trickle of data.
When I let the phone sit overnight, there was over 4mb of data received, even if I turn off any kind of auto syncs on the phone.
wifi settings
Don't know if this will work for you but you can try. In the wifi settings click the menu button and select advanced then set the wifi to never sleep. I know it's counter intuitive but I went to sleep last night at 61% and woke to 57%. Wifi has been fine for me since changing that policy in the wifi advanced settings.
android_mp99 said:
Don't know if this will work for you but you can try. In the wifi settings click the menu button and select advanced then set the wifi to never sleep. I know it's counter intuitive but I went to sleep last night at 61% and woke to 57%. Wifi has been fine for me since changing that policy in the wifi advanced settings.
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Click to collapse
Mine has been set at never sleep since I got the Epic in September, and I double-check after each custom rom flash. Good looking out though.
nikon120 said:
Mine has been set at never sleep since I got the Epic in September, and I double-check after each custom rom flash. Good looking out though.
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Click to collapse
Same here. Mines always been set to never sleep.
Edit: I just tested my phone on my work's wifi network. CPU Spy says it's going into deep sleep just fine. OS monitor shows a static data received/sent number once I was connected. Obviously something about my home network is the problem.
android_mp99 said:
Don't know if this will work for you but you can try. In the wifi settings click the menu button and select advanced then set the wifi to never sleep. I know it's counter intuitive but I went to sleep last night at 61% and woke to 57%. Wifi has been fine for me since changing that policy in the wifi advanced settings.
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Click to collapse
That is my general experience, too. These settings usually keep my WiFi usage low overnight.
But some nights, inexeplicably, I will wake up to find a large battery hit from WiFi. I don't think it is my WiFi router's problem, unless there is some outage duirng the night I am unaware of. Come to think of it, I had that problem last night but did not investigate early this morning before I left. When I get home, I will check with my laptop to make sure my router is running.
I have noticed this too and in particular over the past few days. I'm on the latest bonsai build which does have amazing battery life on 3G but now wifi does draithe battery much more than 3G. This never happened before. I have had my wifi set to never sleep. Any other suggestions?
Obviously haven't tested it overnight yet, but I shut down my one laptop and the constant data trickle immediately stopped. Right now it's looking like something my computer is running might be the culprit. Going to leave it sit overnight to see how it goes.
I found the cause of my drain! Narrowed it down to something from my laptop as when I shut my computer down at night, the drain would go away. The culprit was the HP Printer software for my wireless printer. Once I uninstalled it, the drain went away. Noticed in resource monitor that HPZinw12 was sending a constant stream of data from my computer. Why in the hell it would be also sending to my phone keeping it from sleeping seems pretty odd, but I recommend if anyone else who is having battery problems over wifi and happen to also have an HP printer, you might want to look into this as well.
I'd also add that my solution to getting rid of the problem and still being able to use my printer was just to uninstall the crappy HP software that came with the printer and add the printer through the control panel and let windows 7 install it. It doesn't throw on that HPZinw12 file that apparently polls the entire network constantly.
CapsLockKey said:
I found the cause of my drain! Narrowed it down to something from my laptop as when I shut my computer down at night, the drain would go away. The culprit was the HP Printer software for my wireless printer. Once I uninstalled it, the drain went away. Noticed in resource monitor that HPZinw12 was sending a constant stream of data from my computer. Why in the hell it would be also sending to my phone keeping it from sleeping seems pretty odd, but I recommend if anyone else who is having battery problems over wifi and happen to also have an HP printer, you might want to look into this as well.
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Since I have been experiencing similar symptoms intermittently and I also have a WiFi printer, I have tried to eliminate this as a potential cause. (I don't run an HP control app on my laptop, but already map the printer directly in Windows 7 like you suggest.)
In my case, I still get the excessive WiFi battery drain, and low battery level upon waking, sometimes overnight. But other nights the problem does not occur. So lately I have made sure that my laptop and printer are powered down before bedtime. And like you, a always have my WiFi sleep policy set to "never" and have a strong WiFi signal. But last night I still had the problem, and awoke to find the battery drained to 45 percent instad of its typical 90 percent.
Interestingly, I noticed not only high WiFi battery usage but also high "Cell standby" usage attributable to the well-known Time Without Signal problem -- and this despite my habitual use of the Airplane toggle workaround, which usually works.
Somehow, something caused both WiFi and cell radios to go crazy overnight.
BTW, I run a stock, unrooted Epic.
So far with SRF v1.1.1, my Wifi is back to normal.
On my work network, I've dropped 4% in 3.5hours with my work email syncing every 15mins. So that's pretty good usage given that sync interval.
I also do not have a printer at home, so the printer bit wouldn't have been a cause for me.
While the printer thing took care of the biggest problem for me, I still don't get as good of battery life overnight leaving my phone on WiFi rather than 3G. There is still something my computer is doing that wakes my phone up occasionally, but at least I'm not going to bed with a 70% battery then waking up to a dead phone. At least I have it narrowed down to one computer (total of 3 on my network), as when I shut that particular one down battery life for my phone is back to 1% an hour while sleeping. If I had to take a guess at this point, might be something with media sharing as I use that one as my primary location for music/videos to stream via Windows Media Center.
CapsLockKey said:
While the printer thing took care of the biggest problem for me, I still don't get as good of battery life overnight leaving my phone on WiFi rather than 3G. There is still something my computer is doing that wakes my phone up occasionally, but at least I'm not going to bed with a 70% battery then waking up to a dead phone.
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Click to collapse
How do you know it is your computer? Have you tried just turning it all the way off?
Do you watch the services running on your phone? I routinely stop the DRM service, for example.
Except for the mysterious episodes when I experience this intermittent problem, my overnight battery usage is typically about 1 percent per hour.
boomerbubba said:
How do you know it is your computer? Have you tried just turning it all the way off?
Do you watch the services running on your phone? I routinely stop the DRM service, for example.
Except for the mysterious episodes when I experience this intermittent problem, my overnight battery usage is typically about 1 percent per hour.
Click to expand...
Click to collapse
I've tested over a few nights with a mostly full battery off the charger and reset the timer on CPU Spy. The nights I shut that computer completely off, I get very little battery drain and the phone is mostly in deep sleep according to CPU spy. When it's on, the phone shows a good chunk of CPU at 800mhz and more battery drain.

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