yashsingh1/xdaforums huggingface dataset:
[Epic 4G General] hydralisk:
Juice defender saves your battery like whoa when it's not being used. Here are my current battery stats:

Current battery life: 36%

Time off charger: 9 Hours 30 Mminutes

Display: 57% (screen has been on for 2 Hours 26 Minutes)

Cell Standby: 25%

Phone Idle: 6%

Dungeon Hunter: 4%

Android System: 3%

Media Server 3%

What in the balls is media server?

I consider this phenomenal battery life compared to my EVO when it launched. It will only get better from here

READ THIS:

The way SAMOLED works is that each pixels is individually lit. Because white consists of the most light, viewing anything with a lot of white will kill the battery faster. Black, obviously, uses the LEAST amount of battery life. You can gain a bit of battery life just by using a darker background for your home screens.

Because of this, web browsing is a huge battery killer.
[Epic 4G General] Jsimon9633:
Yeah I've used that program but I'm trying to still be able to use things like gtalk juice defender kills data intermittently making im programs useless

My evo on jd got like 18 hours battery life and without like 7 which would be great for my epic

4 is a bit extreme especially when it goes from 23 to 12 in 1.75 hours with it being off
[Epic 4G General] hydralisk:
The APPS section of Juice Defender allows you to select apps that can use Data. When you open these apps, data is enabled immediately. You'll see the 3G logo kick in. It requires some tweaking to make perfect but id definitely worthwhile.

Just remember. White pixels on epic kills battery faster than Evo.
[Epic 4G General] Jsimon9633:
Thanks for the tips friend
[Epic 4G General] herbthehammer:
Well then now I wish I had the asop browser from cm6 evo. It had inverted display for browser. I prefer dark or white on black themes. One weird thing I noticed is I went from 50's to 8 after a reboot. I pulled it off the charger at noon and it is 830 now. It has been sitting at 8 for quite awhile now. I'm beginning to think that the battery level isn't jiving with what the os is reporting. Maybe a few cycles of run til shutdown then leave off and full charge might straighten things out. It' getting close to 30 minutes at 8%. Hopefully 2.2 will fix a lot of borked stuff.
[Epic 4G General] quasi13:
5 people I know IRL have Epics, 3 (including me) are noticing some strange things with the battery. It seems to stop charging prematurely or charge very slowly. So I'm inclined to agree that it may be an OS issue.

If I didn't have a standalone charger with a spare battery, I'd be pretty frustrated!
[Epic 4G General] LordLugard:
Most of my mkv files are foreign stuff with separate subtitles contained within. Do you have any such mkv files to test if the subs work or are selectable? Thx.
[Epic 4G General] 2.0t03speed:
try turning off data and watch how your phone charges. My battery charges really fast with data turned off. Coincidentally with data toggled off my battery is no longer in super vampire drain mode when i use it.
[Epic 4G General] GucciPilot:
I'm having AWFUL battery life my screen accounts for about 60% of battery usage. Today I unplugged the phone at 8:30am and by 3:30pm it was dead. I set the screen brightness all the way down turned off location, gps, sync, 4g, bluetooth, and barely used it since I was at work. My menu soft key is defective as it isn't as sensative as my brother's epic. I'm hoping that having a defective phone is the problem and when the store gets their next shipment they are going to swap it.
[Epic 4G General] 2.0t03speed:
try toggling off 3g data the battery usage said it was my screen too but as soon as i turned off my 3g data my extreme battery drain went away.
[Epic 4G General] njfoses:
So we bought smartphones to turn off 3g data? If you have to do this to get more than 8 hours of use out of the phone either your phone is defective or the epic is a lemon model.
[Epic 4G General] GucciPilot:
I notice that my phone is constantly keeping an active data connection, this is my first android phone (outside of playing with android on WM devices). I can't seem to find a setting that cancels the connection. I'm going to try the battery programs some have mentioned on here to see if that works until they receive their next shipment.
[Epic 4G General] herbthehammer:
I'm going on 8.5 hours and battery indicator pro is showing 1%, now 0. Moderate internet, 2 hours blue tooth, .5 hours of asphalt 5... Gotta hit post before it dies! It should die any minute now. Battery life is getting better...
[Epic 4G General] Jsimon9633:
Exactly that's ridiculous
[Epic 4G General] benindy:
My wife's Epic is burning though it's battery like crazy. My Evo has been unplugged for 14 hours and I'm still at 50% using it moderately today with wi-fi on all day. She says she's hardly used hers and it was giving her a low battery warning after being unplugged for 7 hours with wi-fi off. I'm waiting on her to get home to see what's been eating it, but something's not right.
[Epic 4G General] 2.0t03speed:
Didn't say you bought it to turn off data just gave you a solution to your battery woes. Also the evo's were having terrible battery problems when they first came out bunch of ppl only getting 5 hours max.
[Epic 4G General] oktanedroid:
Mine tops that. I charged my phone fully overnight to the point where the popup dialog came up telling me I had a full charge and the charging LED turned blue.

I unplugged my phone, and an hour later with 8 seconds of screen on time, I was down to 12%.

My first day with the phone and starting with a full charge, maybe sending 1-2 texts, I had to power down in 4 hours.

I have my screen brightness all the way down, Wifi and bluetooth off.

Something is definitely not right here.
[Epic 4G General] Phen0m:
Im actually wondering if i have a defective battery.. mine burns down with normal usage.. internet, texting.. in about an hour.. my display shows 80% battery drain.. this is all on default settings
[Epic 4G General] houkah:
Sounds like a defective battery. I unplugged at 7:30 am today and i still have about half the battery remaining at 10:21 pm. I used it a normal amount today, a little app downloading, some texting, and a little browsing (no voice calls though).

I had to work pretty hard yesterday to get a full drain as well (I wanted to drain fully and then charge while the phone was off to condition the battery). Perhaps it's something they can check at a sprint store?
[Epic 4G General] richse:
Check your "Time without signal" using the battery usage screen. Just click on the entry that reads "Cell standby". If it's at more than a few percent you are probably having the same problem a lot of us are having where the phone is searching for towers even when it has a good signal. This eats the battery up like crazy. There is another thread where we have found a temporary fix by turning airplane mode on and then off but you have to do this everytime you reboot. My hero had this problem for a while too because it was looking for GSM towers. They fixed that so hopefully this is something that is easily fixed too.
[Epic 4G General] rufflez2010:
I have foun my battery issue to be Fring. If you got that, uninstall it. Battery and login issues gallore! Its 2am here on the east coast and I have plenty of battery left in my phone after a long phone call, 8 hours of work, streaming moozone on my way home and beating the angry birds demo. Very happy with battery life today.
[Epic 4G General] GucciPilot:
Phone swapped, GREAT battery life

Best Buy Mobile got more epics in stock and I swapped my phone. This time I didn't even turn it on, I left it charging with my old Palm TREO 800w charger (1.0A out compared to 0.7A, also no usb cable for the charger, straight to plug). I left it charging for about an hour after it turned blue. I then had everything but bluetooth and 4g on, was running scanner, slacker in the background, playing angry birds, which I beat, also downloaded all my apps again and was playing with the settings. The phone lasted over 5 hours, with the screen and wifi on 90% of the time (spare parts told me this), with the sound up pretty high, and I was cutting in and out of roaming (bad reception in my house, airrave isn't provisioning). I'd say that's pretty good a solid 5+ hours doing all that, not even closing apps, leaving them on to multi-task, brightness setting wasn't at 35%,before I got the flashing white battery light.
[Epic 4G General] jnadke:
About the same here. A full day of normal/light use will use about 50%.

Heavy use and it'll last the whole day, though with maybe 10-20% remaining. I agree, this thing is a champ. I have to work to make it drain battery.
[Epic 4G General] dankey:
Same issue, terrible battery life. Was trying to figure out what is killing my dad’s epic, started at 10% plugged in. Well about 30 min use and being plugged in the battery drained completely. Wild the battery dies if I am using the phone and the phone is plugged in and charging.
[Epic 4G General] mc-fine:
I am in the crap battery camp as well. I never got to do the initial full charge cause the Sprint employee deactivated my old phone before I knew what was going on.

2nd day of owning I got only 6 hrs before I was at 5%. I completely drained and charged overnight. Next day I managed 10 hrs before complete shutdown with lighter use but I get quite a bit of drain when the phone is on standby for some reason.

Last night I put the phone up at around 11am to go to bed with 54% battery left. Wake up this morning at 22%. Coming from the Palm Pre I'm used to battery drain but the annoyance was lessened because it charged pretty fast (little less than 2hrs from zero to full). With the phone off it takes almost 4 hrs to go from empty to full on the Epic. Even with the 1 amp Pre charger the charging doesn't seem to go any faster. My wife has one as well and we are having similar battery life.

I wonder if it has to do with living in a 4G area. I'm in Houston and 4G flickers on and off a lot so the phone is trying to switch back and forth all the time. That might be contributing to the problem.
[Epic 4G General] mc-fine:
Do you have 4G where you live?
[Epic 4G General] houkah:
There you go. I forgot to mention i keep it on 3g and only turn on 4g here and there when i know i'm in a decent service area. When 4g flickers on and off a lot my battery drains quickly. I'm hoping sprint will beef up their 4g service areas a lot more so this won't be as much of an issue.

Just out of curiosity does anyone live in an area with solid 4g all the time? I'm curious what the battery drain is like.
[Epic 4G General] richse:
I live in the center of Philadephia so I have very good 4G reception. The drain with 4G seems to actually be less than with 3G but I think this might be because the 3G seems to have a bug where it is constantly searching for towers even if you have good signal. This was a problem with the Hero for a while too and it causes the battery to drain like crazy.
[Epic 4G General] mc-fine:
At work my building is strange as in its tough for everyone to get consistent coverage.

At home I get 5 out of 6 bars and get 6mbps down easy. Problem is it disconnects with me sitting in the same spot. Lol as I am typing this my 5 bar connect is gone and I am back to 3G.
[Epic 4G General] travo:
4g dropping to 3g, is it sucking juice?

Same thing here, I'm in Houston, we have 4g but the coverage has been spotty at best, even if I get a 3 or 4 bar 4g signal, it never ever stays, it will drop and look for 3g the whole time I'm attempting 4g activities. I may get bursts of 10min solid 4g at a time before a drop to 3g.

For $10 more a month, you'd think Sprint would provide something solid.

That combo of dropping 4g and looking for 3g has to be one big issue regarding battery life. I wonder if the Evo has the same 4g connection issues.

Could it be the 4g service, or is the epic's initial factory stack making it a crappy 4g device?

Battery drain for me has been an issue, I'm new to android and can't stop playing with the phone, Just went from 100% to the plug in charger notice in about 4hrs.

Activity was web browsing, gtalking, few quick calls, and some streaming pandora for about 40min. Tried using 4g, but it kept playing Peek-a-boo, falling back to 3g.

I'm going to try some battery conditioning, 100% to drain a few times to see if that helps.
[Epic 4G General] issai:
Did someone else in this thread mention that their battery level actually went down while using the phone plugged in with the included AC charger? I noticed that today, while browsing some deals websites for at most 20 minutes, and downloaded some B&N Nook e-books, and the battery level went down 10%+.

Doesn't seem right.
[Epic 4G General] koolhand79:
I noticed the same thing. I've never seen a phon do that before. Last night I decided to leave my phne off the charger to see wat would happen. I lost 40% with wifi on. That seems absolutely absurd IMO.
[Epic 4G General] sflores91:
Agreed. I hope that this is fixed in 2.2! I'm afraid to use this thing tethered via usb.
[Epic 4G General] Firon:
Have you guys tried calibrating the battery? One full discharge + recharge cycle would do it. My old WM phone's battery would jump around like crazy until I did that.

It's also possible you have a defective battery sensor, but it's worth trying it anyway.
[Epic 4G General] hydralisk:
It's so weird that people have such varying results with the battery. On a typical work day I get ~22 hours before I decide to recharge. I would call this "light usage."

On weekend days when I have more spare time, the battery lasts ~10-12 hours. This is usually with 4-5 hours of screen on time (the display slams the battery hard).
[Epic 4G General] freddyraptor22:
Best battery life !!

First time i used my Epic the battery went from 100% to 10% in hardly 2-3 hrs, later on i figured out tht live wallpaper was taking to much battery coz the frame rate i set was high and also i installed task killer and batter juice app tht gave me extra long time. Literally i used my Epic for playing games, app, browsing and alot more battery lasted 10 hrs, i bet this is the best android phone out there with best battery life and is the fastest phone ever next to iphone 4. In past phones i had were hero, iphone 3gs, Evo...... EPIC 4G is the best phone i have ever used its too fast didnt lagg once ...hey can anyone tell me tht how to get tht clock + weather widget tht is on EVo???
[Epic 4G General] vactor:
i am about ready to return my Epic because of the poor battery life. it simply is not feasible to have a phone where all i do is light text messaging and the phone won't even last a full work day. i LOVE the phone, but i cannot be rooted to a wall socket :/ and wow, the charging rate is sooooo slooowwwwww!!!!!

otherwise the phone is great. but it's barely useable as a mobile device considering the battery.
[Epic 4G General] bomix:
Trying to decide weather to stay on the EVO or activate my Epic.. I turned it on.. and it's sitting on Wifi, since 8am, and the battery is already at halfway.. IDK with 2.2 froyo.. it will probrably kill the battery life even more.. just like the EVO. Gonna wait a few weeks then activate.
[Epic 4G General] Phen0m:
http://www.anandtech.com/show/3891/samsung-epic-4g-review-the-fastest-android-phone/8

Something has to be done about that 3G drain.. has to be software related
[Epic 4G General] Vandam500:
You can't get the same exact one from what the Evo has because that is exclusive to Sense but you can download Beautiful Widgets and it has nearly all the same exact features!
[Epic 4G General] issai:
Update:

I've come back from the local Sprint store, swapping for a new Epic & accessories. I did everything I could with my 1-week old Epic to conserve battery life: turn off automatic screen brightness and set brightness to the lowest level (which makes the screen basically invisible outdoors), set screen + KB timeout to 15 seconds, only manually turn radios on when absolutely necessary, installed Juice Defender and Task / app killers, fully cycled battery multiple times, ensured minimal tasks / apps were running in the background, ad nauseum.

The power issue was so bad, as some others have reported, that even while being charged with the included AC charger, the battery life would decrease 1% for every minute I was using the default browser on amazon.com, bn.com, and some forums. Two nights ago, while being charged by my car charger, my brother played Real Blackjack for about an hour, and the battery life went from 85%-40%!

Couple other issues I had with the old phone were that some keys on the KB felt like they were beginning to separate from their backing, and the Back soft-key was intermittently unresponsive.

It's been an hour since I got my exchanged unit, which has much more responsive soft-keys and a tighter keyboard. According to Battery Indicator, the phone came with 29% battery life.

About an hour later now, I've dl'ed and installed about 10-15 apps. Configured & sync'ed 5 Gmail accounts. Set screen brightness to automatic. Even played about 20 minutes of the "A Team" MKV.

My battery life has *only* gone down 5%! I'm now down to 24% total capacity!

I'm going to try the battery calibration steps on the EVO thread. If everything continues to look promising as it does now-- I'll be so stoked I could almost cry!
[Epic 4G General] issai:
Another update:

After I got home from work, I charged the phone using the AC charger. Charging from 45% to 95% took about 2 hours, although I didn't keep track of it closely.

Also, I'm happy to report that after carrying out the "battery calibration" steps from the Evo thread, my battery level was at 100% for a good solid hour, according to Battery Indicator, after I unplugged the Epic from the AC charger! Between the 2 Epic's I've already used, this is the first time I've ever seen any of them display 100% charger beyond 5 minutes of unplugging!

Here's hoping to a full day of usage off a single charge tomorrow!
[Epic 4G General] surveysays:
ive tried the evo calibration and use juice defender and my battery seemed to be good for 1-2 days.. but my battery still is crap. my phone shows to be fully charge and my blue led light comes on.. but as soon as i unplug my phone it drops right back down to 98 or 97 percent. i really dont know how people are getting 10+ hours and all day performance off a single charge =x ... im just thinking about returning my epic for another one cause this is redic. im always having to charge my epic throughout the day and all i really do on it mostly is play music on it while im at work and few browsing here and there. even when i have my phone plugged into a charger while im using it, it STILL drains my battery versus actually charging it alot of times. hopefully a new phone will fix my battery issues.
[Epic 4G General] Masterface7:
I would recommend the Fancy widget. It may not have as much function as beautiful widget but it is better looking in my opinion, also it is free. You just have to find it because it is not on the market. HTC said it looked to much like theirs.
[Epic 4G General] Masterface7:
For me The subs didn't work, and there is no options to do tings like disable subs or switch audio stream. I am downloading a new file to test since the one I tried initially used the most advanced codecs and softsubfiles. The (720p) video was choppy as well since it uses variable framerate. I am downloading one that is a little more typical of mkv with subs. Next try the video played smooth but no subs or options to edit filters on the default player.
[Epic 4G General] stud_muffler:
We just got 4G in Rhode Island and at my office I'm having a solid connection, but the battery goes in less then 3 hrs with 4G constantly on. Using 3G only yields about 11-12 hrs.

:cool:
[Epic 4G General] vactor:
plugged with full charge at 9:00 a.m. it is now 3:30 p.m. i am at 9% left.

52m 25s voice calls:

2h 1m 10s screen on time (dimmest setting)

6h 38m 2s cell standby (time without signal 0%)

21m 12s android useage

4h 38m 7s phone idle

most of the screen on was for sending texts. surfed one website for about 1 minute. BT off, wifi off, 4G off. juice defender running. this plain sucks. i am probably going to return it. i just cannot get thru a day of light use with this phone. and i have done at least 4 full 100% to phone powering off by itself at 0% battery cycles. bad bad bad otherwise i really like it. but, it's not useful if i am not able to do what i normally do, or need to be on a charger twice a day (and let's not even talk about the slow recharge rate!!!)

p.s.

that's 6.5 hours of light use. pathetic
[Epic 4G General] hockeymike:
In another thread (or perhaps this one), I saw someone suggest uninstalling Fring if you have it installed. When I did that, my battery life pretty much tripled. This also coincided with a complete discharge + full recharge cycle, so it's unclear which one actually fixed it (if it was a calibration issue).
[Epic 4G General] sultan.of.swing:
I just got my epic yesterday and the battery is fail. One issue is 3g here is very weak so the radio is working hard. But I can have the phone in my pocket half the day, screen off and the phone stays hot. This afternoon I plugged it in turned the screen off and let it charge for about half an hour. Unplugged it and as soon as I unplugged it the battery warning popped up 15 % remaining. Wtf??

Ok my battery just went from 15%to 5% in 10 minutes. Wtf?
[Epic 4G General] Aridon:
Perhaps consider returning it for another and see if it helps.
[Epic 4G General] sultan.of.swing:
Thinking the same
[Epic 4G General] kidnoble:
I unplugged my phone around 8:30 this morning. It's now 12:35 and I'm at about 57% I checked my time without signal and it's at 45% Sprint says this area is one of their strongest service areas, but the dormitories on my campus are MURDER on all cellular signals. Still, 45% seems high seeing as how I've been out of my dorm since this morning and have had at least 2-3 bars if not more of service all day.

I'm going home this weekend where service is stronger, to see if I get better battery life because of better service, but does this sound abnormal to any of you all? Would you recommend I take it back?
[Epic 4G General] Masterface7:
I wouldn't take it back yet. Did you enable airplane mode then disable airplane mode? Reseting the radio like that fixes the problem. Hopefully this is fixed in a future software update.

I went from 25-30% yesterday to 2% today after learning to do this.

I think Juice defender might be the biggest reason you get such good battery life. I am gonna try it out tomorrow. the last few days have all been the same for me about 6-8 hours off the plug 2.5 hours of screen time but a ton of data usage.

If there is a program to force the screen brightness less then the lowest setting that might help too considering the lowest setting is still much brighter than I used to keep my old winmo phone.
[Epic 4G General] MameJunkie:
My first day of use...started @ 7:00am and sucked dry by 11:30am. Granted I fondled it non-stop for those 4+ hours :)
[Epic 4G General] Masterface7:
@hydralisk

Hi, Any chance you can type up a post explaining your juice defender settings? I just installed it and I have not a clue what will help and what won't, or what is more effective and what is less effective.
[Epic 4G General] koolhand79:
Juice defender definitely helps with the battery quite a bit. Only problem is when u use the phone for absolutely anything the battery drops and drops fast. Even with juice defender I feel it loses more than it should tho. I can't figure out what it is. Battery life is just miserable on this phone.
[Epic 4G General] k0nane:
My usage seems in line with what it should be after being unplugged for about 7 hours, making ~43 minutes of calls, and using IM clients/SMS regularly for about an hour. However, calls seem to drain more than expected - of the drain, they're worth 60%? This seems high to me. Also, Battery Life (the widget) seems to be out of line with the status bar battery indicator (which is showing 50%ish). Is the status bar indicator just less accurate?
[Epic 4G General] Phen0m:
lol thats a good point. Were all caught up in battery life overall, but actually using the device, you can watch the battery drop away, like a tic a second.. its crazy