yashsingh1/xdaforums huggingface dataset:
[Desire General] El Norupz:
It's now 3 hours & 40 minutes since I calibrated the phone and it shows 92%. In this time I have been doing some surfing, adding a few new widgets, sent a bit messages, answered one call (talk time about 2 minutes) and the 3G are always on.

This is a big improvement, very BIG!! But since the main part are experiencing much better improvements, im already starting to think that a calibrate with wipe would give you a better result.

Im planning to do this test over four days. Two days to the calibrate without wipe and two days to the calibrate with wipe.

My test schedule will look like this:

Day 1

a test day with normal usage of the phone

test object: CALIBRATE-WITHOUT-A-WIPE-STATS

Day 2

a test day with "economic" usage

test object: CALIBRATE-WITHOUT-A-WIPE-STATS

Day 3

a test day with normal usage of the phone

test object: CALIBRATE-WITH-A-WIPE-STATS

Day 4

a test day with "economic" usage

test object: CALIBRATE-WITH-A-WIPE-STATS

I will explain normal and economic usage in my next post ;-)
[Desire General] lance36:
i've done the procedure on my htc wildfire, the led remained red only a few second and then turned green. (is it normal?)

will post feedback after use.
[Desire General] larbac:
I am curious how to wipe battery stats on unrooted phone.

Only opts I have is wipe data/factory default...
[Desire General] willy792003:
nahh... don't need to do those overdone steps. just follow the one in the first post. charge til full, turn off, charge til full, turn on, turn back off, charge til full, turn on, done!
[Desire General] skinnypupp:
This did exactly what I thought it would do: NOTHING.

Left my phone unplugged overnight, used 50% battery in 7 hours of just sitting there, syncing all night via wifi.

Let's face it, the Desire/N1 battery life just sucks, and there's no whacky trick that will help it.
[Desire General] geminga:
Charged till green with power on.

Turned off, still waiting since an hour for the LED to become green, but it remains red...Something wrong here
[Desire General] r47z:
strange.. I did this (including battery stat wipe) and reboot.. AND I got 99% when I rebooted. now it's 98% :S and now 96%! WTF!
[Desire General] webber2109:
same here.. it doesn't seem to work for me.. my battery is draining very quickly..

in less than an hour, it dropped from 100% to 94% with a little 3G browsing and about 2 sms sent. What is going on? I was having 4201mv when it first finished charging while phone was on.
[Desire General] r47z:
I tried charging it full, then unplugged and charge it until green light appears after that. And now 1hr 1m 35s after unplugging I'm still at 100%. Checked twitter, sent a few network msg (whatsapp), check market, email for a bit.
[Desire General] bluurpie:
When booting to recovery to wipe the battery stats, should the charger be connected to the phone?
[Desire General] gogol:
How do you wipe the batt stat for non-rooted phone?
[Desire General] fakts13:
i noticed the same with the calibration w/ battery stats wipe. going to try again after it charges, but this time without the wipe.

my battery life seems ok though, lasted about 15hours or so with somewhat more than my average usage to kill the last 15~20% of the battery (which included leaving gps status app on for about 20 min the last 5%).

hopefully after calibrating again without the wipe i will get better battery life.
[Desire General] John Mayer:
so i take it that this will work for the n1 since thats what they are reffering to in the instructions, right?
[Desire General] talhamid:
Well I did the procedure today morning. Unplugged at 7.29 AM. Right now 11.25 AM. Percentage at 64%.

5 minutes of playing a (word-based) game. About 10 minutes of browsing. 15 minutes of voice calls. Set Gmail, coporate mail, FB, to update every 2 hours. The phone automatically connects to wifi for 10 mins every hour and then switches off (JuiceDefender).

Set CPU profile to 384 MHz when screen off.

WTF????? Where are you guys getting these impressive battery stats from? I followed procedure given in the first post to the letter
[Desire General] mariosraptor:
i just connected it on charger. i will try it as soon as it is fully charged. hope this makes a big difference cause i love my desire. thanks.
[Desire General] mariosraptor:
from what i know, you can't.
[Desire General] davorb:
Worked for me. Thanks!
[Desire General] kmetek:
Some positive comments, some negative...why such difference.

For me, it's worse......I'll try the longer version today.
[Desire General] perettigiuliano:
Let me say...

Finally which is the correct procedure to follow to "calibrate" battery?

In the first post there is a method, in the fifth post there is another one...

Referring to the author's thread please explain step by step what we should do to "DOUBLE" life of our battery.

Yesterday i have followed so called wipe-stats method but after an impressive starting i can't say that battery is doubled its life.

Something better... maybe... but nothing in compare to some post in this thread where they can read about a miracle! DOUBLE BATTERY LIFE!

Please explain one for all THE PROCEDURE!!!

Thanx
[Desire General] jastonas:
If you do it once it doesnt work again?

I did it once when i bought my desire... now after I have changed many roms whenever I go to step two (unplug and charge) the light is always green...
[Desire General] kmetek:
what on earth is UID10001? :confused:
[Desire General] le090146:
I tried this method yesterday night without wipe battery stats (not rooted phone) and I didn't saw much differences. Its still 10% per our without WiFi nor Bluetooth ...
[Desire General] iang123:
You know what. I remember this happening to my phone a while ago, it staying on 100 percent for ages after about 15 - 20 minutes of phone calls. However I was just using the phone when the battery was at 20 percent and the phone switched off, battery dead! Maybe it's the battery being reported falsely
[Desire General] LBTaylor1984:
TBH i've not seen any change, still seems to run low on energy by the end of the day. Sure it's not flat, but i've got it docked for most of the day.
[Desire General] KBanause:
Four questions

Would those who have an amazingly long battery life please tell me:

Do you have any task killers running?

Do you have installed apps like JuiceDefender?

Do you leave WiFi and/or 2G/3G always turned on or just when you need it?

Have you turned on background synchronization?

For me the answers are:

no

no

always

yes
[Desire General] kmetek:
really what is UID 10001 ?

anything wrong?

why voltage so low????
[Desire General] MRE-net:
For a graphical view of how your Desire's battery is being charged, you can install JuicePlotter. It's available in the market. As said before in this thread, the Desire has some kind of protection mechanism so that when on charger, the battery charges to 100% and then decharges to 90% and starts charging to 100% again. The drops from 100% tot 90% within a few minutes after disconnecting from the charger is because the because at the moment of disconnecting from the charger your Desire is in the process of recharging from 90% to 100% although your battery indicator displays 100%.

In the screenshot below you see that I connected my Desire at 2:00 AM and disconnected it at about 8:30 AM this morning. At 3:30 AM you can see that the battery is at 100% and at 4:00 AM you can see its at 90 %. The process repeats itself at 6:30 AM when it's 100% again and at 7:00 AM it's down to 90% again.

I followed the calibrating instructions in the first post, but I already did this 3 days ago. Elsewhere on the forum I found these calibrating instructions a few days ago. I didn't do a Wipa battery stats however because it wasn't mentioned in the other thread http://xdaforums.com/showthread.php?t=689861

You can see I took the screenshot 10:01 AM and disconnected my Desire at 8:30. Charged it in my carkit for about 30mins and it still is at 100%. That's with pushmail on and I received several mails and replied to them on my Desire.
[Desire General] El Norupz:
So now im awake after my beaty-sleep ;) and im sad to say that my has dropped to 40% :(

Im gonna be back with further details..
[Desire General] andycted:
For the N time: don't rely too much on % shown, it's not alway accurate in measuring battery life remaining, it's an estimate, not too different from how cartridge manufactures estimate how much ink is left (well ok, it's a better estimate than that, but that's an example). Not even those mV reported can be very precise, I think.

I've tried to do the process, compared to charge the battery in my dock charger, separately and apparently the dock charger prevents this method to work.

Instead, with the battery inserted in the phone, I got:

first run: 4084mV

second run: 4099mV

third run: 4123mV

fourth run: 4162mV

fifth run: 4182mV

so you do get a marginal increase. I've noticed that the part with the phone on does recharge as well as when powered off. Stats were wiped at the end of the fourth run. For 'run' I mean plugging the phone for 5 minutes after alternating powering it on or off

no

no

always

yes

Battery lasts two days with normal usage.

For battery usage testing, see this thread here, http://xdaforums.com/showthread.php?t=743172, particulary after post 54 where we found the mA widget and power tutor and testing became more scientific.
[Desire General] xavierdylan:
so what does the battery wipe do? does it reset it to 100% ?
[Desire General] roomkokos:
NO, you CANT wipe stats without rooting your phone, because you need a custom recovery to do so.

The results are different, because people use diferent ROMs that drain their batteries - some are better coded some worse, and you cant expect same battery life on a cyanogenmod which is as bare as it gets, probably lasts a week with normal usage :) and some other room with 3 diferent launchers and switchers and 100 widgets and syncing FB, twitter, weather, news ... every 15 minutes, using task killers and stuff that runs constantly in ur background, using wifi AND 3G connection on all the time. (Some are so d... they dont even turn of 3G when they have wifi on lol) and not to mention GPS running all the time for no reason...

All of these things return different results for different people using diferent roms.

After flashing my rom for the first time, i had my usb connected to pc and i noticed some battery decrease from stock eclair. I just wiped stats and the battery life increased by 50% (= to 14 hours of rather high usage) instead of 9 hrs before.

Now, my desire, when i charge it to 100% it stops at 4197 mV and my Led goes from amber to green.

What i suggest, is you guys charge our phone to 100% when your mV says its 4197, then unplug it, and test it.

If you charge your phone trough the night, (as mentioned by the guy above, using a graph, the battery auto empties and refills itself, to simulate draining/charging cycle) you will get green light, but its very likely for your phone to be unpluged by you, somewehere in the middle of that 100-90-100% cycle, starting your day with only round 95% full battery and not 100%.

Check your Batttery info, using Spare parts from market, or type *#*#4636#*#* in your caller, it will auto go to screen where u press Battery info. Charge the phone till it says 100% (and stay at the phone when it charges to 100%, dont leave for 5 hours lol) and at that point, look at the mV. If its not 4197 you should do the process, if it is, i dont see a point ;)

One more thing, its disadvised to let your phone dry to kill itself on low battery. These phones batteries are different to what we were used to before. Before, you needed to do just that, full drain to full charge cycles, because batteries had some memmories in them. NOW, they dont (or for what is worth, some stats that are loged can be wiped if needed) and it doesnt matter if you charge your battery every 5 % or if you charge it from 40 to 60% and dont use it any more afterwards. Before, it mattered, now it doesnt anymore.

The only thing you do with full drain and auto kill, is damaging your batter eventually because its not supposed to drain completly. It has some backup margin for the situations when youre nowhere near the charger and u use the phone till its drained, but thats not supposed to happen in long term. You MIGHT eventually kill your battery beyond re-chargable limit and you will have to buy new one.
[Desire General] KBanause:
Thanks I will look into that.

But how do you get the current of your battery? I thought I saw a link to an app somewhere in this thread but I can't find it right now.

edit: Spare Parts is my friend :)
[Desire General] kmetek:
spare parts or now even android system info has that info.......

again what is UID 10001 ????????? check my pics please....is it normal other things?

romokos: The only thing you do with full drain and auto kill, is damaging your batter eventually because its not supposed to drain completly. It has some backup margin for the situations when youre nowhere near the charger and u use the phone till its drained, but thats not supposed to happen in long term. You MIGHT eventually kill your battery beyond re-chargable limit and you will have to buy new one.

So it's better to charge it at 14% when it first warns you?
[Desire General] andycted:
Also note that mV value isn't very reliable too. In that thread, at a certain point, failing other methods to gauge battery drain, I've tried to analyze mV difference in time. It wasn't very consistent and somebody more knowleageable than me confirmed this.

Anyway, among those tests you can find useful, consistent and - more importantly - proven, battery drain statistics. My conclusion is that you can you can change any rom you want and still the increase in battery time will be very marginal, even AOSP vs HTC. Tools and programs help very little as well. This method of plugging/unplugging the phone can be useful, but don't expect miracles.

At the end of the only real difference is your usage pattern, some cheap tricks (dark static wallpapers, etc) and more importantly, your expectations from a mobile device. These aren't phones anymore, these are mini-netbooks that make calls.
[Desire General] KBanause:
I know that. But when people say their batteries last more than 48h I have to ask myself "What do I do to not have such a battery life?".

Now, I found out that most of them turned off WiFi/MobileData and even have the phone in Airplane Mode during these 48h.

'Till now I always plugged my phone when I go to sleep to have a fully charged phone in the morning and after these discoveries I will keep on doing that :)

And I found out that HTC Sense seems to use more power as I do have a longer battery life with non-Sense ROMs.
[Desire General] xNavyblue:
What if I am using multiple batteries? Would inserting a second battery messes up the original battery's calibration?
[Desire General] hungrysquid:
Right, after following post 1, I am down to 90% within 2 hours. That's 3G with ebuddy (which could be the battery drainer). Not bad at all.

I wonder what I need to do with my spare battery. I bought it when the battery life seemed so horrible to me...

Do I need to repeat step 1 with my spare battery again? Or does the calibration apply to the phone, rather than the battery?
[Desire General] ItsDace:
so 22h 57m w/o charging - Battery is @ 46%.

Normal usage:

Some Calls, Text Messaging, Facebook, GMail and so

3G + WiFi + GPS

Stock ROM w/o crazy Apps like ATK and such
[Desire General] hensk:
10ks m8 for great battery manuel
[Desire General] siliconaddict:
Maybe most of them, but certainly not all of them. My battery also lasts at least 2 days with modest use.

I never use airplane mode, APN is allways on, background sync allways on, WiFi at home only, Bluetooth when using car kit only, some calling, some texting, newsreader once or twice a day. As I said, I am a modest user but I can imagine that when you don't have a life and fiddle around with your device all day long the battery won't last that long :p.
[Desire General] andycted:
In fact battery life when working = 1.5 days. On a good holiday = 2 days. On a boring holiday = 1 day !

Last time I performed the calibration trick, it showed a value which was lower than the one showed 2 minutes after I unplugged. It's not a reliable measure.
[Desire General] jungoed:
4h32 with a call and some sms,still 100%,weird :)
[Desire General] webber2109:
Somebody help! After calibration my battery life became worse! Much worse! Just 3hrs 20mins and I lost 17%.. I merely sent a few sms and a little of WiFi.. can someone please tell me what's wrong?
[Desire General] roomkokos:
Yes, thats when i usually charge it, thats the latest % i start charging it, i usually dont go below that. Went twice - once dropped dead so i got the feeling how long it takes to kill the battery and once coz i didnt have the charger around. And i get 4197 mV at 100% full battery.

Pa drugac je rumkokos not romokos :D

Yes that is wierd :) i got roufianos v6 and got 2,5 hours (10 minute call and wifi on with auto sync weather, and fb) and i got 95% :)
[Desire General] kmetek:
O **** še en iz SLO :)

Ma kurac zdej nafilal do 100%, opravim klic 5 minut paf pade na 92%....naj gre u kurac ta postopek :)

Just charged till 100%, make 1 call around 5 minutes or so and it dropped to 92%, **** this procesure, it sux :P

what on earth is draining my batter ? UID 10001 ????

Is it possible google contacts etc? Will make a "shoot me" pic and post......
[Desire General] andycted:
So don't use it. But please watch your language.
[Desire General] kmetek:
Well sorry :)
[Desire General] alex_hk90:
Same answers for me, and I yesterday my Desire's battery was at 19% after 1d 12h 30m unplugged. :D
[Desire General] Dany0:
np ;)

/10char
[Desire General] ivas75:
Samsung Galaxy S

I followed the procedure in the 1st post last night on my Samsung Galaxy S, and by now the result is simply amazing...

As I write, the battery is on 73% after 17 hours and 20 minutes of usage.

Of course these 17 hours include the night hours when the phone was unused but from 1:00 AM to 7:40 AM the percentage of the battery remained on 100.

I had two alarms set off, made 3-4 phonecalls, received emails through gmail and exchange, used navigation program for about 30 minutes and added two events on the calendar.

I have wifi, bluetooth, 3g, background data and auto sync turned off. Also brightness is on minimum.

Battery usage:

Cell standby 27%

Display 21%

Phone idle 19%

Navigon 18%

Voice calls 14%

Android system 2%

:eek:

I have to say that usually every night I had to charge it....

I am trully amazed.

Thanks for this info! :)
[Desire General] xNavyblue:
So, no one can answer about the multiple battery scenario?

It seems a bit dumb to me if you can physically change the battery but the system won't cater to that.
[Desire General] Lennyuk:
Basically there are two ways to calibrate here.

One calibrates the phones internal settings

the other does the battery and the phones internals.

The methods here are designed to make the % the phone shows more accurate, but won't increase the length of time the battery takes to discharge.

In order to do this you will need to follow these steps:

-Drain your battery right down (ALL THE WAY) turn brightness on and leave gps status running to speed this up

- When no power left, leave phone off and charge all the way to green light, and an hour beyond. (Usb charge takes longer but is better)

- When charged +1 hour boot straight into recovery and wipe battery stats, then boot up

- use as normal but don't charge again, let it drop once more

- charge again till full + 1 hour (phone off)

- boot as normal (no wipe)

DONE
[Desire General] gianton:
Wow this method really works, thanks to the OP!

After 4h discharged with 15mins 3d game and a couple of mins fidling with the phone and battery is still at 100%!!!

Simply amazing. :D
[Desire General] kmetek:
gianton: this 4 discharges of yours did you made them randomly or in some loop are anything?

like 1.day once till drain of battery and again......
[Desire General] gianton:
I did them as described one right after the other.
[Desire General] kmetek:
like i thought you did, i'll continue the same ;)
[Desire General] Sleehond:
Hi,

Just have followed the steps from the 1st post. I really hope to see some difference. Nowadays i can use the phone for a whole day but than i have to charge it. Hope to be able to get around 1.5 day with this method :)

Will reply back soon!
[Desire General] Cooperman_UK:
Done the battery reset and calibration at 1pm today, sent 5 sms, a couple of e-mails and about 5 mins web browsing no phone calls and its now at 90%.

Will post back tomorrow how it goes.
[Desire General] Sleehond:
2 hours further and still 100% :D in those 2 hours:

* Internet (3G) on all the time

* Mail checks every 15 minutes

* 1 sms sent

* 1 call received for about 1-2 minutes

Not bad at all. Before the method i think my battery would say 90% or something, i'm sure! So yes, i think there is really a difference!
[Desire General] Lennyuk:
In 12 hours since I did this I have dropped to 67% but have had a normals days usuage with either wifi or mobile net on all day.

downloaded and installed some apps

played some games.

Not bad I would say
[Desire General] hi0u826d:
For me, I'm

No

No

Wifi when I need it and 2g unless using APN

No

Currently after 28 hours in which I sent 26 texts and made one short call and was underclocking to 384 with screen off I have 92% battery remaining.
[Desire General] vidmas:
Yes, I agree with you - this is wrong way to improve a battery life. I think, that processes, who are not important in firmware, must be disabled, like on windows, where on my laptop, who have phisical RAM 512Mb, I have alvays not more 255mb of ram used. This ir main reason of short battery life.
[Desire General] KBanause:
:eek::eek::eek:

Screenshot or I don't believe you.
[Desire General] ljesh:
Something strange happen in the morning.

I was playing youtube videos over wifi, watching some porn, things like that... really using my Desire and battery. I was at 22% remaining battery. Then, when I hit 21%, I got warning that less then 1% of battery is remaining and the phone shut itself down. I turned it on again, I had 1% or 0% battery, cant remember, and it shut down itself right away, so I had to recharge.

My point is, it seems like this "calibration" doesn't work. It shows 20% of battery more then you have in fact. Just see when you'll hit 20% remaining, and the phone will shut down itself.
[Desire General] b6rt:
Very interesting, thank you. I'll try myself to let the battery empty itself.