yashsingh1/xdaforums huggingface dataset:
[Desire General] roomkokos:
No. Let the battery fully drain out. Till it auto shuts down. Then, hold volume button down and then hold power button till it runs in recovery mode. Go in Custom recovery and wipe stats. When its done, go back and choose reboot from the menu to turn the phone back on and then connect the charger.

BUT, IF

if you cant get to the recovery with the energy that is left in the battery when it was supposed to be fully drained.. in this case plug the charger in and then boot to recovery (while charging) BEFORE you hit wipe stats do this:

- UNPLUG the charger,

- hit wipe stats

- go back in the menu to hit reboot

- plug the charger back in.

Now have the phone fill up to 20% and then unplug again. Use the phone as normal, to see when it will ran out of battery again. Make sure u got a good look on those % or else u did nothing :) From this point on, i guess u can only hope the battery goes down at 1% again instead of at above 15%.

That is not dangerous at all, its not a rom flashin process or anything related to that. Its just stats records.

The only "dangerous" thing about this is, its not good for the battery to autokill itself many times. I mean this by +20 to 30 times. These batteries are not meant to drain so much to die on their own anymore, not like old batteries that that was good for the life circle of the battery. So in the long term, if u plan to kill the phone because of full draining, it might eventually start to hurt your life preformance. But trying this process once, its harmless.

And here is whats impossible...

When i can believe the first part .. I cant believe the second, as its virtually impossible.

100% after 7 hrs of standby phone.. would mean around 700 hours before the phone would ran out of juice on its own. The official HTC tests shown the battery runs out at about 360 hours. Dude thats more than double time less.

And at this point it would mean either:

- your phone is showing wrong % to whats real

or

- your battery shuold last more than 2 days with less than 1% loss per hour of standby

or

- your battery wasnt at 100% after 7hr of standby

As i said, i believe your 2 days of phone alive, (not 2 days of using it) Look at your Phone Idle time and compare it to time Since unpluged and then we will see how much the phone has actually been in use.

Displaying 100% for 7hrs od standby ... thats just your display showing wrong, trust me.

When does your battery go out? at what %?
[Desire General] willexmen:
What rom do you use, and what order did you do this, did you wipe battery?
[Desire General] vidmas:
I use HTC DESIRE, ROOT, NexTsense 5.3 FroYo FRF91. I wipe a battery using fakeflah. Its working!

One thing you must fix - you dont need to overcharge a battery. Its means, when battery is full, you dont need to charge them more. I think this is main reason, why after night charing, you finding only 90% of battery capacity.
[Desire General] vidmas:
Maybe you think , that I lie? See the statistic of using phone
[Desire General] kmetek:
omg vidmas: 1h30 min in just 2 days? i don't make that in month :P
[Desire General] willexmen:
Okey, great i just downloaded Nextsense yesterday! :)

When did you wipe battery stats?

Charge full when phone on

Charge when off

Turn on phone, turn off and charge agian

Wipe battery stats and reboot.

Did you do it like this, because i tryed several times but can't get to work :(

ONE more fast question! when u normaly flash roms you can see the procces in the recoverymode, but when i wipe battery i dont the the procces, is it the same for you? f.ex "formating system - deleting files- done".

Thank you for answering!
[Desire General] roomkokos:
dude get some friends :D joke :D :D
[Desire General] alex_hk90:
That's exactly what I'm saying. Today it's down to 53% after 12.5 hours, but during that time I had WiFi or 3G on continuously (to sync GMail), sent and received a few texts, used Google Maps for around 30 mins (so GPS active during this time), and spent around 15 mins on the internet as well. All with no underclocking of CPU and screen on full brightness while in use.

I'd take a bit of incorrect battery reporting in exchange for over 100% improvement in overall battery life.

What app is that by the way?
[Desire General] kmetek:
"stats"....it's on market....free.
[Desire General] nitrox1:
Easiest to get your battery sorted.

Run phone till empty.

If you can get into recovery, then wipe stats, if battery too low plug it in to the charger, and immediatly go into recovery and battery stats and wipe stats.

Then let it charge.

Turn it off, and let it charge for 8 hrs, as if you have gotten it right out of the packet.

You will then get a true scale, no amazing hanging on 100%, but will reach zero, and not shut you down mid email, at 12%.

Then stop fiddling, and use your phone, let it discharge and charge, build up some stats after that.....

I still have not really gotten more that 12hrs on any rom. But that's what I would expect from large screened top of the line smart phone, when using the screen, and speaker etc. all the time

Sent from my 8-bit ZX Spectrum using semaphore.
[Desire General] roomkokos:
Yea dude thats when u actually USE your phone, i cant get get more than 10-12 hours either.

But when u strip your phone down to calls and sms and standby = basic functions, you can get your battery to last for 36+ hours. Meaning your phone isnt "dead" after those hours, it doesnt mean u use it for 36 hours :)

I got to keep my phone up for 1d 12 hrs (36 hrs) and most of that was stanby, 2 and a half hours of talk is practically nothing comparing to what i normaly use my phone for, as i use it instead of my laptop and stational comp. I only use them two for bigger programs like photoshop, dreamweaver, maps, stuff like that. I can get my emails and fb and some forum moderator job on another forum with my phone (usualy).

I am very pleased with my USE of the desire for 10 hours and i think the battery is great, but having it last for 36 hours on "eco" saving mode with very little usage is great to know as well to get a feeling how long the phone can last if u plan to go somewhere without plug in at proximity
[Desire General] malavi:
Well... I think that i did something wrong :( cuz after that my battery drains faster! It might be caused because when it says "Once the phone is powered

completely on

..." i didnt

is it possible?
[Desire General] roomkokos:
What u mean by powered on completly? The phone is completly powered on, when u hit in the PIN code and when it loads the sim card.

If the phone is draining faster... then repeat the whole calibration process again, make it right this time.
[Desire General] Shotma:
Thank so much for your advice and walkthrough!

Must admit that I was trult amazed to see that it actually worked.

Nexus One with cm 6.03
[Desire General] malavi:
Thanxx!

I mean that not all apps (which load at startup) were started...

so I can do it one more time without risk?
[Desire General] Snowtoad23:
So no-one beaten my 56 hours? :P

I'll see how far I can get on this charge to see if its consistent
[Desire General] gianton:
2nd day after the calibration and my device shut down at 0%. I did a full charge with a battery stats wipe before.
[Desire General] juju66:
After having calibrated my battery, my phone last for THREE WHOLE DAYS, 72h with 51h on and with airplane mode by night, from 23h00 to 6h00, normal use for the rest (before=two days). But it shut off by himself at 10% after saying me to charge it at 15%.

Second charge: already 15% left in half a day, I don't know if that "calibration" thing is really durable. I might think that it is a very good charge with this manner (on, unplug, off, plug, on, unplug, ...)... will see

Desire / Official HTC Froyo/2.2
[Desire General] alex_hk90:
Yeah, I'm wondering this as well (whether or not this 'calibration' needs repeating). After a couple of charges with really good battery life, my Desire is now down to 76% after only 4 hours with minimal usage (30 minutes PDF reader, WiFi on to sync GMail), after falling to 91% immediately when unplugging the charger. Perhaps if it survives to 0% instead of 7-8% it will be similar, I'll wait and see.
[Desire General] perevers:
When i choose wipe battery in ClockworkMod i dont see a progress bar, it only jumps right back into the menu, it dosn't even thinks for 1 sec.

Do you get to see a progress bar when choosing wipe battery? Its the same for me when i choose the other wipe possibility in the advanced menu.

Per
[Desire General] nitrox1:
I forgot to check mine, how unhelpful am I! Missed it, had to charge for some reason. Oh yes had to make sure phone was on, will try again soon.

Sent from my 8-bit ZX Spectrum using semaphore.
[Desire General] HellSassa69:
Do you get a cofirmation from clockwork if you wipe your stats? I did get non but was back in the menu!

My battery showed 4.128mv after I reeboted but I am on 92% now after 30mins or so.
[Desire General] nitrox1:
Nope no confirmation, split second, all done. Nothing left but the testing it out, but do test to the end, then build up stats.

Sent from my 8-bit ZX Spectrum using semaphore.
[Desire General] roomkokos:
Lol i messed sth up :)

Btw somone reporyed 50+ hours... cann u tell us the phone idle time? Or screen shot?
[Desire General] thanito:
i did the whole calibration thing, but now im losing 1% every minute!

something is wrong..

Thats what i did:

charge while phone on till led is green

switched off

charged till led green

switched on and after finishing boot switched off again

charged till led green

booted into recovery and wiped battery stats

then switched on

Hmm any tip? Maybe i should wait for battery to drain, then wipe battery stats and do the whole thing again?

Cheers,

T.
[Desire General] nitrox1:
Sorry feel as is I'm chatting too much but all you have done is introduce your phone to a new highest charge, all dependant on the way you use it. Don't panic

Sent from my 8-bit ZX Spectrum using semaphore.
[Desire General] thanito:
Yeah but since i fully charged it, i was expecting for it to stay at 100% a lot longer (before the calibration it did!),

after calibration it dropped from 100-92% in 10 minutes..weird stuff!
[Desire General] rain5:
I've tried to do this, it seems like after the first time i calibrate my desire it goes back to its old behaviour of going straight from 100% battery to about 92%.

Also, on a side note, anyone notice that the green led never shows up? mine never does, only orange, then again im colour-blind so its hard for me to tell the difference, its there any way on a desire without rooting it to change the led color for charged and charging? Also, SystemPanel never shows the desire at being 'Fully charged' in the monitor section, even when i charge it for 8 hours overnight.

I love this phone but damn this battery issue is ****ting me.

HTC Desire Telstra branded android 2.1-update1
[Desire General] nitrox1:
But were you checking your phone a lot to see the battery drop? Watching paint dry?

Sent from my 8-bit ZX Spectrum using semaphore.
[Desire General] syklitengutt:
hi, did the reset. Now battery is like this:

79%

awake time: 14:40:15

Minimal usage, 20 min calls, couple of text messages, some wifi (7 min) installing some progs, checki juice plotter and stats etc.
[Desire General] vidmas:
I dont know what did you need guys, but I think, you doing something wrong by wiping. See a pictures, this my result after wipe battery.
[Desire General] refnulf:
So what's the consensus then guys? Is it worth doing this? Does it last or will you need to recalibrate after a few days? Is it true or just a lot of smoke? What's the best way? Will Manchester United win the league this season? Will Messi score 50 goals? Will a meteor strike the earth and kill us all?

etc
[Desire General] alex_hk90:
I think it's worth trying if you're not happy with the current battery life.

This still hasn't really been determined. Mine lasted for 16 hours to about 20% yesterday with a bit of usage (45 mins PDF viewer, 45 mins videos on the Internet Browser, some texts).

Don't know. No - Chelsea will (and I say this as an Arsenal fan) :(. No - he's overrated. God knows. :p
[Desire General] xtcislove:
I lost 2 % in 13 Hours! (Not much used) but before i lost up to 30% in this time! Many thanks for this with interactive sheduler and power save profile (245 max) when screen off i have so much Battery!!! Thanks!
[Desire General] sjauquet:
I hear this so many times...

The fact is this is normal behavior.

HTC charges the battery up to 100% then let it discharge to 90% then start again charging to 100%

This choice is to ensure a longest battery life, as overcharging is bad for batterys.

If you disconnected the charger when the battery was at 92% this explain that.

Try removing the charger just when the led goes green, then you should have 100%
[Desire General] KBanause:
If I would remove the charger at that time the led turns green I start with 90%. At my phone, the led turns green when it hits 90% (checked with Overcharged) but it still charges until it reaches 100%. Maybe I should recalibrate again?
[Desire General] willexmen:
I just can't get it to work! i tryed several times, different methods and on different roms.

Can some body explain your progress, rom, when to wipe battery and how long you charged it?

I have always lost about 1% per 5min or so if im on the phone, for exempel after the the calibration i went to the settings, and lost 1% :(
[Desire General] david632:
am i missing something here, when i charge my battery whilst on, for say 12 hours, untill the led is green, power off then charge again untill the led is green, ok after a 12hour charge the battery is going to be green , so the next step dosent work because its fully charged??????
[Desire General] cosmocrapper:
I've had near miraculous battery life since calibrating (no wipe). Was normally getting 24-30 hours with casual usage but since calibrating have had >50 hours with 13% left with similar levels of use. I had to give in and charge in the end as needed a full battery for a business trip.

Very pleased now. :D
[Desire General] thanito:
i removed the charger EXACTLY when the led turned green, both times (while on and while phone off), so something is wrong for sure, battery now drops way quicker than before.

i ll wipe stats again when my battery drains and do another one time the whole calibration and then post results
[Desire General] litening:
Try charging through USB

I've tried all methods and my battery life still hasn't improved.

After charging battery voltage never exceeded 4108 mV.

(While still plugged in max battery voltage was 4167 mV)

Have noticed one thing though:

Having obtained green LED while phone-ON charging, charging while OFF resulted in pretty quick change from amber to green LED.

Now trying to charge from USB connection with laptop and it takes much longer for LED to turn green.

Will let you know if charging through USB makes any difference.
[Desire General] alex_hk90:
It should be an option - personally I'd rather have longer battery life right now and have to replace the battery in a year or so (or however long it takes to degrade it) than shorter battery life now in exchange for longer battery life later on.

Today it's down to 65% after 11h 43m unplugged, with casual usage (some texts, 30-45 mins Internet, WiFi on all the time to sync GMail). So still uncertain as to whether the 'calibration' needs repeating, but definitely better than what I was getting before.
[Desire General] Jgruar:
I hope people realize that this won't fix anything if you have some apps keeping your phone awake even when the screen is off (wakelock) or your settings for syncing are every minute or so. Check your battery stats with spare parts or *#*#INFO#*#*. Your running and screen off percentages should be close to each other. If not, your phone is not always idling when the screen is off and is eating the battery a LOT faster.
[Desire General] accel24:
this procedure is very promising. but when i did this "calibration", it made my battery worst than before. i just wish that i didn't do this.

after 1 hour (normal usage) may battery dropped from 100% to 85%. i'm very disappointed.

any procedure to undo what i did? i mean going back to normal. i just realized that i can live with low battery life than this.
[Desire General] Jgruar:
You didn't do much in the first place. I suggest you use your phone normally and in the end you'll find out you have the same amount of usage time.
[Desire General] accel24:
yes maybe i'm expecting my battery to be better because of this.
[Desire General] jeremyoshindle:
SetCPU

Is it possible for someone to put SetCPU in post 1) at the start of this thread?

This is an article on it and it saves a tonne of battery.

Good battery saving settings for SetCPU profiles can be seen here at the end of the review:

http://jeremyoshindle.com/techno/longer-battery-life-for-your-android-mobile-with-setcpu/
[Desire General] willexmen:
please, if someone have a few minutes to help me do the right "calibration" and not mess up the 7th time!

Yes, ive done it several times now, and with shifting results. Some times a little little better battery time and a lot other times it just drained it in a few hours!

So if someone could explain the whole procedure, what rom, when to wipe battery, drain the battery, charge it for how long etc? Write done you procces*

Im using Nextsense latest rom.

This time i drained my battery, wiped the battery when almost no battery, then the calibration from first post, and wiped when fully charged.

Today, from 8am until now 6pm i have 15% left. So 7h , 3 hour in "screen on" (or whatever its called)". Played a games for 15min, internet 15min and played with phone about 30min. Im using ultimatejuice so the data closes everytime my screen is off, i got the ultimate battery settings (20%screenlight, no wifi, black background, no gps etc)

And still i got this sucky battery time, i really need more then 7hours, and even minimal usage!

Thanks in advanced.
[Desire General] syklitengutt:
Ok, charge phone, unplug, turn off, charge, unplug, boot phone, charge, unplug, reboot into whatever and wipe batt stats.

Doesnt really do anything for me.

Used 10% of battery with over average use on 1,5 hours now.

Blæ.
[Desire General] ivanchin99:
Tried the OP's method and it's been 5 and a half hours since I last charged, only lost 2% battery on my galaxy s :D
[Desire General] Adevem:
i'm trying it out myself! last step now... great doing this while catching good ol' 1987's Predator. :D

edit : all done. shall let it see if it improves the battery, starting by the overnight drain!

edit2 : well 1% drop without any use with only auto-sync on my gmail account. in 30mins, let's hope it stops there.

edit3(sadly) : another %tage drop. 2% drop over the span of an hour. shall head to bed and see. oh god please...
[Desire General] alex_hk90:
To follow up my previous posts - it doesn't look like it needs repeating, as with very light use today (WiFi on for GMail sync, 30 minutes PDF reader with screen at maximum brightness) it's down to 74% after "14h 14m 12s unplugged". :)
[Desire General] cCeT:
didnt work for me.it still drops 10% suddenly or stops at about 90%
[Desire General] faxvouy:
Awsome! Thanks a lot. Battery lasted me 1day 3hours and 40minutes.
[Desire General] jheitman:
can u tell me what u mean with this : boot into recovery wipe stats. since i dont understand what u mean here.:rolleyes:
[Desire General] Adevem:
good morning folks. attempt no. 2 lol. probably did something wrong last night, i continue to believe that ;p

anyway heitman, when your phone is off hold...

vol up + power + home (that is if you're on a

Galaxy S

) and wait for the screen to show, use your volume rocker to select advanced > wipe battery stats. (only available in ClockworkMod's Recovery)

edit : well i'm done with it (again), shall monitor it over the day.
[Desire General] damjand:
i'm doing it writght now...

1st i charged it full, so led was green

2nd turned the phone off, conected charger, and led went green at the moment.

3rd fully powered it and then shutted down, conected to the charger, and now it is still charging (for cca 20mins)..

4th i'll do wiping, but still waiting for led to become green...

:)

5th i'll do the testing...
[Desire General] cyron_at:
6th: Report back ;-)
[Desire General] litening:
Giving up

Ok.

I am giving up. Charging via USB does not change anything. Tried every possible way described in this thread.

I just cannot charge my battery beyond 4108 mV.

Not even using an external battery charger.

N.B. I have two additional spare batteries for my Desire and none of them charge beyond 4108 mV. (Crappy AC current???? Unlikely... ;) )

If anyone has any suggestions on how I can force my battery to get a full charge, please let me know. Otherwise, I'll resign to having to carry my spare batteries with me at all times.
[Desire General] damjand:
6th...

i think that i've finished procedure an hour ago, and i have 96% now

BUT

there might be some mistakes that i've done, like maybe charging via USB not via wall charger, or something in those steps (like twice fully boot, power down, charge)...

so, i'll try it tonight when i come back home, cause now, i have laptop and usb cable only...
[Desire General] talhamid:
OK Guys here are my results after one week of struggling:

1) Running NeoPhyte ROM (5.3) version. Very fast, stable, keeps around 100 MB of RAM free at full load, no complaints there.

2) SetCPU set to 'interactive'

3) SetCPU profile set to dial down CPU to 245 MHz when screen locked.

4) SEt JuiceDefender to go online for 5 mins every 30 mins. Very seamless

Plus I performed the procedure set out in this thread. Now, previously my phone lasted for 4-5 hours with wi fi on and moderate to heavy usage. Now it lasts for around 10-12 hours. Also, it remains on 100-95 range a lot longer. One curious thing though: JuiceDefender doesn't seem to make a lot of difference. Will test for one more cycle though.

Also, please un-check the setting 'enable always-on mobile connection' in Mobile Connections, it seems to help a lot.

Bottom line: If you will use it, you will lose it. But even so, all these steps taken together seem to extend the battery life to roughly 12 hours, which is not bad at all. I just don't know which one did the trick.

One more tip: give it two or three cycles before expecting results - it helped in my case.
[Desire General] damjand:
ok...so here is my 1st result...

yesterday from 12:30 untill 00:30 (12:30PM till 12:30AM) my phone went from 100% - 60% with wi-fi on (shutting down after 15mins without using), few phone calls, about 30sms (sent&received) and with about 45 mins chatting with ebuddy.

not bad at all, but only thing that might confuse me is that it doesn't hang on 100% for some long time. i unplugged my phone from charger this morning at 8:30, and now (10:06) i've got 97% with wi-fi on and with 1-2 phone calls and few sms...

so far so good :)
[Desire General] zoltrix:
*subscribe to thread*
[Desire General] MoxFulder_CH:
I just did the procedure but after the 'start-stop' sequence, I plug the power adapter (here an usb cable on my computer) and the led never turn red nor green, it stays off.

I had to pull out the battery to be able to start the desire. Any idea what I am doing wrong ? I have the official rom, no root.
[Desire General] Adevem:
did you wipe battery stats?
[Desire General] Adevem:
gonna give it another shot without wiping battery stats via clockwork mod.

judging from OP's post in bold and constriction...

Connect charger when phone is ON - charge till full

Disconnect from charger, power it OFF

Connect charger when phone is OFF - charge till full

Disconnect from charger, power it ON

Wait for it to be completely on (media-scanning and all), then OFF it again

Connect charger when phone is OFF - charge till full

Disconnect from charger, power it ON and use it as per normal

shall see if it works!
[Desire General] accel24:
@all

Help me please.. i did this procedure and now when i plugged in my desire for charging it stops at 99% and doesn't change to 100% and green led.

I've tried doing the procedure again and nothing has changed.