yashsingh1/xdaforums huggingface dataset:
[EVO 4G General] HipKat:
I can tell you, it totally works, and I swear by this method, not draining the battery fully, removing task killers (which I always had used) and you don't even need to be rooted!
[EVO 4G General] hkbladelawhk:
Epic Win. LOL
[EVO 4G General] willyschwarz:
worked for me too on a htc vox s710

on first sight I didn´t believe what I was reading here, but after 10 hours following the instructions it worked fine on my old htc vox. I did some testing, exactly same usage of the mobile. Before using this method 1 hour required 22% batterylife. AFTER USING THIS METHOD 1 HOUR REQUIRED 7% BATTERYLIFE, so its appr. the half of it. Thumbs up on this thread guys.
[EVO 4G General] fixxxer2008:
this never worked for me at all.
[EVO 4G General] craig198:
if this really was a solution, then why would programmers not tell it to charge in this manner? lazy?

right now its supposed to charge to 100% and then stops until falling to 90% charge and then charges back up to 100%. Thats what I was always told.
[EVO 4G General] empiire:
I just cried. Literally.
[EVO 4G General] HipKat:
What programmers are you talking about??

I'd think the people from the joint where the actually MAKE the phone, might have a clue.
[EVO 4G General] softlikerose:
Here's a few simple ideas to extend your battery usage.

First, turn it off at night if possible, and any time you know you won't be able or want to use it. If you are in bad reception area the phone, even on standbye, is searching for a signal. This wastes the battery charge. So turn it off for a while then too.

There might be an extended battery available for your phone which will give you more talk time and standby time.
[EVO 4G General] Zoidpilot:
You have a good point with the "searching for signal battery drain" comment... but you don't need to turn off your phone... my suggestion: hold the power button then set "mobile network" to OFF. You can still send/receive calls+text, you just can't use the internet. If you do want to use the internet, just simple turn it back on when needed. Takes just a few secs to reconnect. THIS IS GUARANTEED TO EXTEND BATTERY LIFE BY HOURS. Do this + OP's suggestion and my friends, your battery woes are in the past. My father has an Evo and at work what he does is turn the mobile network on once every 2 hour for about 5min to refresh e-mails, and get updates...etc. and he says sometimes he goes 2 days without charging. 2 DAYS!! I called bull on this until today when my battery dropped to about 17% and I was at the mall so I said what the hell and tried it. 1hr later after a few calls and text to find my buddies in the mall I made it to the car. I went to connect the car charger and I was at 16%. This battery regimen worked for me and the mobile network switchoff saved my phone. I hope this helps from one Evo lover to another... I highly suggest everyone try this or else I wouldn't write this long-ass post supporting it. I hope you guys don't fall asleep halfway thru this post... LOL
[EVO 4G General] judhi:
Works for me too, but need to repeat the steps everyday to get extended battery stamina. Impractical.
[EVO 4G General] HipKat:
I took this advice this p[ast weekend. I turned off data, unless I needed it, specifically for any reason.

After 61 hours off the charger, I finally plugged back in @ 20%.

Seems to me, that is the best way to save your battery.
[EVO 4G General] SRT300:
I will give this a try:D
[EVO 4G General] Zoidpilot:
Yep... that's about what I get on mine. Battery woes = a thing in the past. :p
[EVO 4G General] mschaffer:
Google blames app developers

I will never forget how Larry Page blamed Android app developers with a Jobs-esque do as I say, not as I do.

Of course, everyone is to blame:

Google: Their OS is not efficient

Hardware Vendors: Their implementations aren't the best (Would a bigger battery really kill you? I would rather have a bigger batter than a curved phone back.)

App developers: Page is partially correct: poorly written apps can suck the juice out of the battery!

Users: You must optimize for your own usage patterns. Of course, you shouldn't have to do this.
[EVO 4G General] f0rged:
Just tried charging the battery that way.... And it was instantly at 97% wtf? I at least would see 100% for a minute or two before....
[EVO 4G General] solo89:
Hey Gang-- I've been trying to get better battery life on my rooted EVO. I'm trying the mobile network method and it's been great so far.... but I have a question: Is there a way to toggle the mobile network on and off from something like the power control widget?

I have extended controls widget and it gives me an option to turn on and off my data network (disables APN) but I have no idea what APN is... It also gives me an option to switch from 3G to 2G.. would either one of these be the same as disabling my mobile network?

Thanks!
[EVO 4G General] HipKat:
If you have some Sense ROMS, add widget to desktop/Settings/Mobile Data
[EVO 4G General] jagxj220:
Test Subject

Okay so trying this method for one day, and moderate use, e.g. texts, phone calls, internet, and downloading applications, it has worked better than I expected. I did not expect it to work, because of the comments on this thread saying there was not a significant difference in battery longevity.

The battery lasted 12 hours, which is 4 to 6 hours longer than previous instances where this method was not applied.

I did turn off the mobile network and relied on WiFi; therefore thought there was going to be dramatic increase, e.g. 20 hours battery life. Even the sync events for Facebook and E-Mail were decreased to once a day, and every four hours, respectively. In addition, the display timeout was set to 2 minutes.

I will try this method again tonight to determine whether these results are consistent.

Sent from my HTC EVO 4G. EVOke - v.- summon into action or bring into existence, often as if by magic.
[EVO 4G General] iahk:
Are you saying that your battery normally only lasts 6-8hrs? That's pretty horrible. Are you in a very very low coverage area most of the day? I used to work in a building that gave little to no coverage and I was able to squeeze 10-12hrs battery life out of the phone.
[EVO 4G General] dkdude36:
i just hit the 15 hour mark, with 30% left. that's with heavy usage, about an hour of hotspot, some games, bunch of emailing, even a little bit of schoolwork, etc.
[EVO 4G General] {ParanoiA}:
i'm gonna try turning off data except when i need 2 use it...like checking out the XDA forums
[EVO 4G General] jagxj220:
Pretty much the case. I drive in a supposed well coveraged area, so signal strength is not the issue.

Sent from my HTC EVO 4G. EVOke - v.- summon into action or bring into existence, often as if by magic.
[EVO 4G General] jagxj220:
Okay so second day of testing under moderate use I got 11 hours. So far it doubles the battery length, but I think it was due to the changing of sync frequencies of my applications.

Although it seems it was due to the above mentioned, the advice of the HTC e-mail to change the sync times has helped.

I will continue the process to again see if it has the ability to increase battery longevity.

Sent from my HTC EVO 4G. EVOke - v.- summon into action or bring into existence, often as if by magic.
[EVO 4G General] HipKat:
It does. My battery is totally "conditioned" because every morning, I shut my phone off and keep it plugged in when I get up (to keep the snooze alarm from going off every 15 minutes) and now, I leave it unplugged all day at work, and when I get home, I'm normally still above 85%.

That took a little time before it got to that point, and MUCH better than when I first got my phone and my 3500 maH battery..... Even the extended sucked 'til I started doing this.
[EVO 4G General] jae04cc:
well i tried the batt thing, and it def worked...thanks!
[EVO 4G General] xlGmanlx:
i have found SBC has similar results and doesn't require me to turn my phone off.
[EVO 4G General] thowell3:
This is very interesting. Will try it out and see what happens
[EVO 4G General] xCaldazar:
I wanted to try this on my Motorola Droid, but I can't charge it while it is off it appears. It reboots as soon as I plug it in, and if I turn it off while plugged in the light on the side to indicate it is charging doesn't turn on. My droid still gets good battery life but wanted to give this a shot as well.
[EVO 4G General] xda_kwr:
Ok, Even if this thing works, which is likely does, it is not going to give a big boost and it is NOT going to be permanent. In-fact, rather than ovrcharging your battery, you might have a longer life by just doing your normal charge and not leaving it on for too long.

http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
[EVO 4G General] jawang26:
Haha thanks for the post but honestly kinda of a joke to do all this work just to have decent battery life...way to lazy to do this..but hopefully the release an update or something just gonna buy an 2nd batter and car charger for now
[EVO 4G General] HipKat:
When you do this with an SBC Kernel, it actually is a remarkable difference, but on a stock kernel, while there is a noticeable change, it's not ground breaking.
[EVO 4G General] sonicice:
Edit: Nevermind, didn't realize how old that post was
[EVO 4G General] jmorgie:
who exactly are we tricking?

Here's the question: Does working this battery charging trick make the battery hold more charge OR does it better calibrate the battery reporting so we can get the max out of the battery? I am guessing its the battery charge calibration which would be a true software fix as opposed to software fix somehow putting more amps into the battery.:D
[EVO 4G General] jsm927:
How do you know which Kernal to use. Sorry for the noob question but I havent flashed a kernal yet have been trying to figure out which to use. I am using Ti XGB sense. I tried MikG which was an amazing rom but terrible battery (4hrs) I was told there were no sense kernals? Is that true? I would love better battery. Or do you know a good sense rom that has good battery life?

Thanks
[EVO 4G General] pandamaja:
I actually knew a girl that would shake her phone...in order to send her text messages faster.
[EVO 4G General] Zoidpilot:
Lmao!
[EVO 4G General] CDKJudoka:
Another useless post.

I followed the directions to this to the T, just for gits and shiggles. My phone has been on after the last unplugging for 4 mins and it dropped from 100% to 95%.

Boo, hiss!!!

Either way, I end up getting a full day on the phone with moderate to heavy use so I am not complaining too much.
[EVO 4G General] HipKat:
1, welcome to stock kernels. This thread is full of people who say it works.

2. see where it is in 4 hours. 14 hours.....

Mine drops like that too, and this morning ,26 hours off the charger, I was at 73%
[EVO 4G General] :
The battery obviously isn't the issue.maybe instead of making people go through this they should do a software fix that will make the phones operate with this kind of battery performance....can't be that hard for them to do

Sent from my Kings Alliance Evo...all hail the King!!!
[EVO 4G General] runcool:
Are ALL OF YOU RETARDED!? I bought the phone for the functionality. not to be told that I can't use my phone. Everyone here knew that the battery life of these phones s)u(c(ked. Learn to deal with it.
[EVO 4G General] CDKJudoka:
That is good to know. Overall, I am happy with the Evo's battery life, even compared to my Moment. I can take it off the charger at 7am and when I get home at 5:30pm, it has anywhere between 30-45% depending on whether I was streaming Pandora all day or playing PvZ while I am waiting for an image to complete.

Such anger!! Such passion!! I like it!!

I have no issues with my battery life. I knew going into the Android world that battery life was an issue, if you didn't set them up right.
[EVO 4G General] mskeys2xx3:
OMG This is AWESOME!!!!

So my battery life did double. But it was TERRIBLE before. I am not sure if it was just this technique or that in combination with changing to Golden Monkey but together they are working beautifully. Yesterday my phone went from 100 (after charging all night) to 80% in an hour without any use. Today it is chugging along beautifully! Thank you! But really HTC you can't figure it out?!?!?!
[EVO 4G General] HipKat:
It's that method. I use it a lot and the difference is striking
[EVO 4G General] djcodine:
Have to give this a shot
[EVO 4G General] stkiswr:
Can't believe I owned my phone for almost a year. Never did this. Did today. My siedio 3500 is very happy and has noticeably more juice.
[EVO 4G General] broad_st_bully:
I've been getting damn-good battery life by charging fully, unplugging when "fully charged" then charging for about one more hour.

As soon as you take the phone off the dock/charger it drops & the green light turns orange...

that's when I turn it off & charge for another hour...then it lasts for about 2 days...I don't stay on it constantly but I do text, e-mail, call, angry birds alot...and use GPS as well...here's one of my recent screenshots (below)...

Juice Defender helps bigtime and setting the right profiles in SetCPU seems to help a bit as well...if I continued using the phone the way I have, technically-by what the battery reads now-it might last for 4 days since 1 day+ only used up 25% of the battery...but I know that ain't happening....

if anyone is wondering I'm running MikG 2.1-3.0 v2.56 & Chop Suey 9.1 Universal...

phone runs better than when it was new...
[EVO 4G General] eejayyeahuuh:
\

Mind sharing your JD settings? Are you on the beta?
[EVO 4G General] kendallc123:
Wow, I'm so going to try this!

EVO love.
[EVO 4G General] stkiswr:
Quick way to keep it going...charge at night. Turn off when you wake up. Charge til green. Turn on. Top off. Hit the road.
[EVO 4G General] stinky_pinky:
I heard if you leave it in a bowl of water, then stick it in the freezer over night, it will tripple your battery life. Can anyone confirm this working?
[EVO 4G General] ch1naski:
I know I'm a little late with this reply, but really dude.... Eat one.
[EVO 4G General] shawayne21:
This really works, just tried it last month. My battery doesnt die for 3 days on moderate use!
[EVO 4G General] dougdascenzo:
This works. I haven't plugged my phone in almost 2 months since reading this post yesterday.
[EVO 4G General] SketchyStunts:
its so funny cause it looked like a kid made it. lol
[EVO 4G General] BlazinThat:
Cool
[EVO 4G General] Paloki1:
What a Classic!!
[EVO 4G General] felty04:
Just finished will update tmr
[EVO 4G General] ziaulh.ch:
This is crazy. are we supposed to charge for 10 hours each time? no ****ing way....
[EVO 4G General] waltnich:
This is a lifesaver.

:)

I didn't wait the full hour. When the green light came on I went to the next step and it only took half the time.

I don't know how long this works but I've gone over a week since doing this conditioning and battery has been performing fine with no need to re-do yet.

I think this is a general maint item like an oil change. Inconvienent but gotta do when the engine starts knockin.
[EVO 4G General] :
Yeah. Tried the OPs suggest on a few different batteries. For me, the problem appears to be with the logic board. That's what I get for soldering the repairs myself. Oh well. Battery aside, EVO 4G is still my favorite phone. Just break bread and buy a few more batteries if these techniques don't work out.

Sent from my Evo4G on the xda-app.
[EVO 4G General] HipKat:
Look in Evo the guide in my signature.

There's a really good, and it takes forever, I admit, method of battery calibration
[EVO 4G General] :
Zang!

I'm gonna give that a go. That guide, in it's entirety, is fairly extensive. Nice work.:good:
[EVO 4G General] jrollercoasters:
Your guide definitely does the trick just annoying to do haha
[EVO 4G General] HipKat:
Yeah, it's definitely annoying, and if you don't get to where the green light goes on, just move on
[EVO 4G General] albanodesign:
i've not tested yet but i think it's gonna work, because its like staying without breathing, first time you stay only 15 sec but if you do it again and again you can stay breathless up to 90 sec's :)

be careful with breathing you can be updated to jelly bean!
[EVO 4G General] ziaulh.ch:
This is crap. Just leave it charging even if it shows green. It will still intake Mah recharge. This is the extra time you get when you get stuck at 100% for a decent amount of time. You can check the difference between without leaving it charging and leaving if charging for several hours.
[EVO 4G General] SenorEvo:
I did try most of the suggestions and while it does work, after time, the battery does start to fail and drain faster especially if you load the last stock update as the GPS will keep searching when running navigation and cause the battery to overheat.
[EVO 4G General] ChevyLT:
Worked like a charm on My HTC Desire S!

I was having very poor battery life, like literaly only 24 hours. For now it's charged about 8 hours and it's 98%.

Those HTC engineers sure knows what they are doing!
[EVO 4G General] josephpatrick:
If the phone charges in 1.5 to 2 hours, do i still need to keep it plugged in for 8 hours? wont it damage the battery or blast it? Have always been scared to keep it plugged in for long time once it fully charges to 100.

thanks
[EVO 4G General] Albaholic:
Agreed, going through that process should be totally unecessary. I guess I'd be ok with doing it once. But if we have to do it everytime, that's down right rediculous.
[EVO 4G General] OneStepAhead:
Pretty sure that was just a typo, as my email was about the Evo. At least I hope it's a typo... she goes on to talk about the screen separation issue, is that something the Incredible had as well?

I'm almost done with this ridiculous circle jerk of a charge.. 45 more minutes until final step complete. i'll report back my results, although it sounds like this is going to help as other people have already reported so.
[EVO 4G General] nebenezer:
lol..

I'm at the "power on for 2 minutes" step :) I hope this helps

I also REALLY hope this doesn't get undone by flashing a new rom or wiping batt stats. I'm guessing this is more for the sake of actually getting a full charge into the battery itself.
[EVO 4G General] beesneazy:
Yeah, keep us posted. Waiting for my battery to finish draining from yesterday ... seems as if the battery is a little better since the update ... not sure how much of that is me wanting to see a change.

Will get my clown on later with all of this, see what happens on this end.
[EVO 4G General] Joshonekenobi:
Oddly enough, there is truth to this. I had an issues with a ROM stuck in a BOOT loop. Since it was so late at night I left my Evo plugged in overnight turned off.

The next morning I got my Fresh ROM .3 working again, and I had my phone on USB power at my office for a bit as a Pandora radio. Since then my battery life has doubled. I am a heavy , but this is with out using the 4G radio at all. My 4G/3G radio switch back and forth constantly if I use my 4G.
[EVO 4G General] nebenezer:
Followed the steps to the letter, I'm down to 90% after 30 minutes...

maybe it'll get better after the first discharge/recharge cycle :(
[EVO 4G General] Jykinturah:
Someone already pointed to this guide, but this one works better.

http://xdaforums.com/showthread.php?t=701567
[EVO 4G General] nebenezer:
I did that too, last weekend, it did not help my battery performance..
[EVO 4G General] nbakid2000:
I'll try this method and see. Ever since I changed my phone settings with the Network CDMA trick, I have noticed huge improvement but not enough for what I expect in my phone.

If this works, hopefully it'll work even better with the new 3500 mAh I'm waiting to be released soon.
[EVO 4G General] nbakid2000:
Now I'm not sure I want the battery. It's huge and adds a big bump to the back of the EVO.

Ugh.
[EVO 4G General] mrono:
Just think of it as a baby bump ^_^
[EVO 4G General] OneStepAhead:
2nd reply from HTC below
[EVO 4G General] OneStepAhead:
I'm at 80% after 5:00 hours awake time. Usually my phone was dead after 6 hours. Now that I removed Nimbuzz and my phone will actually sleep, i'm guessing I will be getting REALLY good battery life thanks to this trick. woohooo! sorry to hear its not helping you however.
[EVO 4G General] pecosROB:
I use eBuddy, not sure if it sleeps...
[EVO 4G General] ezkialrage:
ebuddy does not sleep. even battery saver mode keeps phone awake. ymmv
[EVO 4G General] pecosROB:
Wow that sucks. Good thing I only use it when I need to see if someone's online or not.
[EVO 4G General] DraginMagik:
i also did the voodoo mentioned by kthejoker20. ( http://xdaforums.com/showthread.php?t=701567)

I'll try the new official HTC sanctioned voodoo as well. although, a doubling of battery life would be pleasant...I'm highly skeptical that a simple battery conditioning could give such drastic improvement.

in addition i found a blurb from Cyanogen on his site. i can now comfortably make it through the day without a recharge, although it's usually on the USB cable at my desk for part of the day anyway.

"Battery recalibration

If you're experiencing higher than normal battery drain, try the following:

Charge the phone to full battery; let it keep charging until the battery says it is fully charged. Do not wait until the light is green, it isn't always fully charged, causing a lot of inaccuracies. (You can check by going to: Settings -> About Phone -> Status -> Battery Level = Full.)

Boot to recovery mode and go to console (or adb shell) and type:

mount -a

rm /data/system/batterystats.bin

NOTE: Newer Amon_Ra recoveries have an option to delete the battery stats, do this in place of the console commands above.

NOTE: To have the most accurate of battery stats, reboot the phone immediately after wiping the battery stats and wait for CM to boot completely to the desktop. Once your entire boot is done and you have full access to the phone, go ahead and pull the charger and continue with this troubleshooter.

Do not charge the phone until after draining the battery completely, resulting in it automatically shutting off.

Recharge the phone completely and then use as you normally would"
​

I'm not sure if the voodoo or the battery-stats-wiping had the effect, i did them both at the same time. I do notice a difference and it is a positive impact.

....wishing for 8,000mah battery that would not only function as desired/expected, it would fit under the existing battery cover...or a coldfusion powercell belt w/ wireless electrical connection....
[EVO 4G General] muncheroo:
froyo has some new features that should allow people to write some push IM type of apps... probably won't be easy but I can see a lot of interest for that kind of app
[EVO 4G General] sdbarker:
So, even HTC is saying that they don't know why it works? Support needs to talk to Engineering and figure out why they're telling people to fix their problems in a certain way but with no actual reasoning behind it.
[EVO 4G General] nbakid2000:
Does anyone know if the battery is supposed to be completely drained when starting the first 8 hour period or does it not matter?
[EVO 4G General] PoisonWolf:
Interestingly enough, this worked on my HD2. From the usual 5 ~ 8% per hour, I'm now only at 92% after 4 hours.
[EVO 4G General] Minjin:
You guys realize that this tech support person is saying that the idea came from reading forums right? That means that you guys are using this email as a reputable source and they are using you guys as a reputable source. I think the term for that is circular reasoning. :D

Long story short, with something as HIGHLY variable as battery life on a device that has different usage every day, I'm not going to trust anything short of a well thought out experiment. The idea that they are DOUBLING battery life is just laughable. No voodoo for me. Sorry, just the electrical engineer in me speaking. ;)