Database Users

Battery indicator of HD is unreliable

Before first time reboot , my HD has 32%power
I tried to reboot 4 times..
32%>19%>25%>15%>22%
Or this is just my HD problem?

iamcrazyfire said:
Before first time reboot , my HD has 32%power
I tried to reboot 4 times..
32%>19%>25%>15%>22%
Or this is just my HD problem?
Click to expand...
Click to collapse
Why in the world don't you charge properly the battery before rebooting the device ?
My HD always reports the right battery values because I don't let the battery drain that much, if you wan't the battery to last many months please don't let it drain so close to 30%.

PJMDS said:
Why in the world don't you charge properly the battery before rebooting the device ?
My HD always reports the right battery values because I don't let the battery drain that much, if you wan't the battery to last many months please don't let it drain so close to 30%.
Click to expand...
Click to collapse
Because I want to test the battery consumption of HD .

Perform a complete discharge, recharge fully and then test..
Regards,
Carty..

PJMDS said:
Why in the world don't you charge properly the battery before rebooting the device ?
My HD always reports the right battery values because I don't let the battery drain that much, if you wan't the battery to last many months please don't let it drain so close to 30%.
Click to expand...
Click to collapse
Also some of us have no choice,
My device never lasts a whole day,
The battery consumption on the device is very bad.

iamcrazyfire said:
Before first time reboot , my HD has 32%power
I tried to reboot 4 times..
32%>19%>25%>15%>22%
Or this is just my HD problem?
Click to expand...
Click to collapse
I have the same, when I reboot my HD.
The last 20% drain very fast to 0%

zoro25 said:
The battery consumption on the device is very bad.
Click to expand...
Click to collapse
You should say: some applications I installed or functionality I have enabled are draining my battery badly. The device itself with the standard applications does not drain the battery in one day.
I agree that for example using wifi is a major drainer, but I do not beleive there are other devices out there that do it a lot better, like say continous wifi for two days...
Battery cosumption is always a problem in all devices. There is no single PDA out there that does not have a "battery" thread and how bad it is blah blah blah...
I can give you examples of devices that will be drained within a couple of hours, and the same devices being able to last for three weeks or more. It all depends on what you run and how you use it.

Your may be right or maybe not,
I think I'll un-install my apps and reinstall again with each new app being added one day at a time, to work out if any of them is killing my battery

zoro25 said:
I think I'll un-install my apps and reinstall again with each new app being added one day at a time, to work out if any of them is killing my battery
Click to expand...
Click to collapse
A "normal" application doesn't drain your battery. By a "normal" application I mean something that you open, work on, and close it again.
You have to pay attention to applications, which are running in the background and/or are polling every few seconds something.

nick007 said:
I have the same, when I reboot my HD.
The last 20% drain very fast to 0%
Click to expand...
Click to collapse
Hi,
the battery took long to reach 50%... about a day of heavy usage but after 50%, it took less den an hour of heavy usage to get to 10%. anyone experience this? or is my battery fautly? thanks.

i know that between soft resets my battery will change values, usually go up e.g. if its 40% when i reset when it reboots it will be 44%

i have the same issue here
but the battery last 2 days with me

angka8 said:
Hi,
the battery took long to reach 50%... about a day of heavy usage but after 50%, it took less den an hour of heavy usage to get to 10%. anyone experience this? or is my battery fautly? thanks.
Click to expand...
Click to collapse
Same here...on my device from 50 to 10% goes WAY faster than from 100 to 50%. To me it means crappy indicator. Must be a HTC problem, as my Prophet displayed similar behaviour.

This behaviour ("jumping" percentage after power-off) is completely normal, but the explanation would be very long.
Short version: What the battery % displays is in fact a translation of the voltage of the LiIon battery. When you switch off the device the voltage recovers a little bit, thus you get a higher % value when you switch it on the next time .. and which will fall rather rapidly until it stabilizes under the present load of the battery. Also the discharge curve of a LiIon battery is not completely linear.
-Valynor

Proper way of calibrating battery?

Hi folks, I'm running CM6 8/26 nightly with Snap v7.4 kernel with SetCPU set to conservative on 998mhz max and 245mhz min. I'm getting horrid battery life and I think I'm doing something wrong: I wiped battery stats in Clockwork and now my battery SUCKS. -.-
Question is, what its the proper way of calibrating an Evo battery? I've seen the official HTC response but I don't think it's going to make a difference. Isn't there another method that requires you to drain the battery? Any info will be appreciated I've been looking at forums all day.
Sent from my PC36100 using XDA App

letshaveDEX said:
Hi folks, I'm running CM6 8/26 nightly with Snap v7.4 kernel with SetCPU set to conservative on 998mhz max and 245mhz min. I'm getting horrid battery life and I think I'm doing something wrong: I wiped battery stats in Clockwork and now my battery SUCKS. -.-
Question is, what its the proper way of calibrating an Evo battery? I've seen the official HTC response but I don't think it's going to make a difference. Isn't there another method that requires you to drain the battery? Any info will be appreciated I've been looking at forums all day.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
You can't just wipe battery stats - there's a process to go through. What you're referring to is Cyanogen's battery recalibration method found here. Read through fully before wiping anything.

Thank u very much, I wiped the stats by mistake
Sent from my PC36100 using XDA App

fachadick said:
You can't just wipe battery stats - there's a process to go through. What you're referring to is Cyanogen's battery recalibration method found here. Read through fully before wiping anything.
Click to expand...
Click to collapse
Actually it is almost as simple as wiping battery stats. That command he gives is what the wipe battery stats command in the recoveries do.
1. Charge battery to full (where it's actually 100% not green light.
2. Boot into recovery wipe battery stats.
3. Fully boot into os then unplug charger.
4. Leave unplugged until the phone shuts itself off.
At that point you should be calibrated.

On a related topic, the Battery Graph app available in the market also has an option to wipe battery stats from within the OS, doesn't it? Might save having to reboot into recovery once you're charged up.

It's a lithium battery. You can't condition it. Just use it as normal and ignore all these placebo effect steps.
Sent from my PC36100 using XDA App

daving313 said:
It's a lithium battery. You can't condition it. Just use it as normal and ignore all these placebo effect steps.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
This is all about calibrating the software (battery stats).

daving313 said:
It's a lithium battery. You can't condition it. Just use it as normal and ignore all these placebo effect steps.
Click to expand...
Click to collapse
They're not calibrating the battery. they're calibrating the phone to know when the battery is really fully charged which, until you do this, is not the case when the charge light turns green.

Regardless, none of this worked. I've quit all services, no sync, auto brightness and wifi and I'm still getting horrible battery life. SetCPU is set to conservative. It's BULL**** my display is on for thirty minutes and the battery dies 20%. I played a game on my friend's iPhone 4 for twenty minutes and his battery barely died 3%. This is really unacceptable and I'm probably going to return my Evo or sell it if the battery life doesn't get better soon from these methods I'm seeing online
Sent from my PC36100 using XDA App

Crazy man, maybe something happened cause that is pretty bad.
Have a backup to go back to, prior to this happening, to see if it reverts back to normal?

Naw nothing happened to my phone...... All of us Evo owners should be able to use this beautiful phone with all of the features at max without the battery going to ****. My phone has behaved this way since unboxing. I'm not a big fan of the iPhone 4 but I will give it props on battery life. I have yet to try the longer HTC method but it seems kind of pointless.....
Sent from my PC36100 using XDA App

If it has always been like that then you may have a bad battery, if it started after you wiped the battery data then it is just showing you bad readings.
You should be able to get a good calibration if you reset your battery data again, maybe try through your recovery if possible, and then fully charge it with your phone turned off. Once it is charged you can either use it normally till it dies or you can tether, use gps, watch youtube, etc, and drain the battery down. Just make sure you go from a full charge to the phone shutting itself off without plugging it in to anything. Do that charging with it off and using it till it dies two or three times and your battery stats will be calibrated.
When I did this to mine it showed my battery at 0% for at least half an hour before it finally died, and that was with me listening to pandora and browsing the web.
Edit: FYI, the Evo's talk time is usually between 6.5 to 7.5 hrs, the iPhone 4 is around 7 hours also. If your battery is not lasting that long you need to take it in to sprint and have them give you a new battery.

letshaveDEX said:
......I have yet to try the longer HTC method but it seems kind of pointless.....
Click to expand...
Click to collapse
HTC's method worked wonders for me. i'm a heavy heavy HEAVY user (no, not fat) and I get a good 10 hours with everything besides 4g on plus surfing, gaming and tethering for SEVERAL hours. For all that I do on my EVO 10 hours is HUGE. If I have a moderate day of usage (maybe a little more than moderate for the average user) I get around 19 hours.

Btw none of this will help if you are getting near 100% awake time. If that's the case you need to find the software causing that first.
Sent from my PC36100 using Tapatalk

Try this, it helped me. I did not come up with this btw.
With phone on, charge until green.
Unplug and turn phone completely off.
Charge phone until green once again.
Unplugand turn on. Once phone had turned completely on turn the phone back off again.
Charge until green one more time then unplug and turn on and you're done!
Sent from my Htc Evo 4g

[HELP] Big battery drain. 1 hour battery life

Ok I lied, it's not one hour backup, it's 50 min battery backup. I charged my phone to 100% 4163mv and played about 2 songs, battery dropped to 47 and then suddenly 0%. It all happened in less than 50 min. Just when I was thinking, it can't be more worse. I charged and battery was 99% :O. Another time, phone shut down at 40%, when charged moved up to 70% and number started increasing every 3 seconds. I did calibrated it many times so that's out of question. I bought this phone in May so I will be surprised if battery is defective. I'm confused. Please help!!
Sent from my GT-I5800 using xda premium

friend863 said:
Ok I lied, it's not one hour backup, it's 50 min battery backup. I charged my phone to 100% 4163mv and played about 2 songs, battery dropped to 47 and then suddenly 0%. It all happened in less than 50 min. Just when I was thinking, it can't be more worse. I charged and battery was 99% :O. Another time, phone shut down at 40%, when charged moved up to 70% and number started increasing every 3 seconds. I did calibrated it many times so that's out of question. I bought this phone in May so I will be surprised if battery is defective. I'm confused. Please help!!
Sent from my GT-I5800 using xda premium
Click to expand...
Click to collapse
charge till you get"unplug your charger " message

I did, many times too.
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friend863 said:
I did, many times too.
Sent from my GT-I5800 using xda premium
Click to expand...
Click to collapse
Time for a new battery bro...
Same thing happened with me....
On a side note : Does the back cover of your phone fit?
Cause when I had this problem my battery had literally expanded in size.... :X
Due to which the back cover did not fit perfectly.......

Yeah, it fits perfectly..
Sent from my GT-I5800 using xda premium

Download from market app called Battery Calibration.
Open it and connect your phone to the charger. When you have 100% status, and ~4200mV click Calibrate and unplug your charger.
Then set the LCD Brightness to max, set timeout to never sleep or just use your phone to fast discharge it(that doesn't need to be fast and doesn't need to be slow it just need drop to 0%).
Let it automatically die because of low power, and then charge it to 100%(you can use battery calibration app to see the voltage, around 4.2V it's max).
After that your phone should have a much better battery life.

JoHnNy08PL said:
Download from market app called Battery Calibration.
Open it and connect your phone to the charger. When you have 100% status, and ~4200mV click Calibrate and unplug your charger.
Then set the LCD Brightness to max, set timeout to never sleep or just use your phone to fast discharge it(that doesn't need to be fast and doesn't need to be slow it just need drop to 0%).
Let it automatically die because of low power, and then charge it to 100%(you can use battery calibration app to see the voltage, around 4.2V it's max).
After that your phone should have a much better battery life.
Click to expand...
Click to collapse
He already said, he did calibrate the battery....
I 100% think you need a new battery Mate....

Try installing any stock rom before. Maybe that can help. I was getting ultra fast battery drains when I flashed indroid 5.0
Sent from my GT-I5800 using xda premium

Yes u need a change of batt. I had not even up to half an hour of wifi surfing. After changing i could use the phone for 30+hrs
Sent from my i9003 powered by Poseidon's Rom + UC kernel

Change the Battery.. I had the same problem.. then found out my battery got swollen big time..

ICS Upgrade gives you a shorter battery life ??? Read how to get long battery life

Hello friends,
Here finally I upgraded to ICS and honestly I get great ( huge ) battery life..
before also I get upgrade and i get very low battery life because of low calibration of battery without my knowledge..
so I've reverted back to gingerbread 2.3.5 and I'm happy
But who wants older version when the new shiny and superb upgrade of ICS is there anyone ???
So finally I upgraded to ICS and after many searching ,, finding ,,, reading and confusion with doubt The great battery life will be came out from our Loving SGN.. so please do not get disappointed just see below.
Really here I provide you some small and very easy steps by using it you will be definitely be happy with your ICS upgrade ..
you doesn't have to go anywhere and doesn't have to buy anything with your valuable money ..
Really happy
Then read it and get longer and more juice from your battery..
you have to follow some easy steps below
1 . First upgrade your ICS from any source whichever you like ... by kies air or Kies on PC or mobile odin or Via PC ODIN [ please do full charge of battery before any upgrade low battery can make your phone unusable or dead you can get more info on other threads ]
2 . Hope you have upgraded successfully.. then use your phone till your battery goes down to 5 % or below...
[ Caution ] Do not use it till it switched off automatically.
3 . Plug your charger and charge it till morning if you are charging at night or else charge it around 6 to 7 Hours even after full charged .. it's important step.. Do not Ignore it ..
4 . and then use it as per your requirements till battery shows 5% or below
5 . Repeat the step 3
6 . Do it around 8 or more charging cycles.
You get really miracle after 3 or 4 full cycles...
[ caution ] do not overcharge after that i.e just do 6 to 7 hours charging for around 5 - 6 cycles ... after that charge till battery shows full charge i.e around 3 - 4 hours. do not overcharge ..
made it habit of full charge cycles if you are comfortable with it. it really gives great battery life then average battery life.
Hope It'll be helpful to you
Regards

It is better to charge randomly than doing full charges every time on Li-Ion batteries.
Doing full charges every time on Li-Ion will result in battery being end-of-life faster...
Overcharging is also bull****. The phone automatically stops charging the battery when it's fully charged.

_breez_ said:
It is better to charge randomly than doing full charges every time on Li-Ion batteries.
Doing full charges every time on Li-Ion will result in battery being end-of-life faster...
Overcharging is also bull****. The phone automatically stops charging the battery when it's fully charged.
Click to expand...
Click to collapse
As per research the full cycles of Li-on battery gives good hold of charge and also batter life..

in all honesty your post is as useless as mine right now.

According to me, It can be considered as myth . . If the battery needed to be calibrated then it must have been official.. n 2ndly the procedure above is not professional at all... So dnt even think it wud work.... Neways someone can always try and authenticate...:thumbup:
Noted by the BEAST!!

KAASHP said:
As per research the full cycles of Li-on battery gives good hold of charge and also batter life..
Click to expand...
Click to collapse
Doing full charges for calibrating the battery: no problem if you do it once in a while
But you are suggesting people to ALWAYS do full charges on their Li-Ion battery...
8-10 cycles after eachother is too much as well. 2 charges will be enough.

thanks for more info bro
maybe 2 is enough but in many cases it'll be not...

Why do you need to do this just because the OS has changed? And if so then why is it not require on GB?
Sent from my GT-N7000 using xda premium

_breez_ said:
Doing full charges for calibrating the battery: no problem if you do it once in a while
But you are suggesting people to ALWAYS do full charges on their Li-Ion battery...
8-10 cycles after eachother is too much as well. 2 charges will be enough.
Click to expand...
Click to collapse
I totally agree with you!
Also, never let a battery dry for long periods, it will be damaged beyond repair.
Lithium Ion batteries perform better when you keep it as charged as possible.
I call this thread BS too... But I thank the user for the effort

Yeah ICS battery life sucks. I've done what OP said and I still get 4 hours less Battery life than what gingerbread would give me.

tw15tr said:
Why do you need to do this just because the OS has changed? And if so then why is it not require on GB?
Sent from my GT-N7000 using xda premium
Click to expand...
Click to collapse
It's essential because all the states of your battery will be wiped in most of the cases while you upgrade also it's helpful to you if you upgrade your ROM.

inurb said:
yeah ics battery life sucks. I've done what op said and i still get 4 hours less battery life than what gingerbread would give me.
Click to expand...
Click to collapse
ok bro try this procedure and also report us..
In most of cases we have solved this issue with this procedure even i had this issue before now it works like a charm.

I did several full drain and full charge cycles when I upgraded to ICS. Still got the battery drain bug so I think its more luck than anything else if your battery lasts.
In my case I've discovered that power cycling the device after charging is the most reliable approach.
Install CPU Spy, run it after a charge, reset the timers, and then leave your phone in standby (screen off) for 30s or so. Unlock the phone again, and check CPU Spy - if the 'Deep Sleep' cycle is unused then do a phone restart. This has worked EVERY time for both me and a friend who I told about it. I'm getting similar battery performance to when I was running GB!

Battery life depends on a lot of things, ROM version is not the main thing.
This is my setup:
ICS version LQ3
Speedmod 3-3 Kernel
Disabled a lot of Samsung stuff (Readers hub, social hub...)
No automatic sync of twitter, e-mail, etc
I get pretty much zero battery drain when in deep sleep mode.
Of course when using the phone, screen on, Wifi On, autobrightness... battery usage is bigger and you can drain the battery in only 4 hours if you go for it.
Be careful with:
- Live wallpapers, I've seen cases where they remain active all the time
- Apps syncing data on background every few minutes (facebook, twitter, etc)
- Apps uploading a lot of data on background (google+, dropbox..)
- Games that crash and leave the CPU in a high power state until you reboot

Agree
vcespon said:
Battery life depends on a lot of things, ROM version is not the main thing.
This is my setup:
ICS version LQ3
Speedmod 3-3 Kernel
Disabled a lot of Samsung stuff (Readers hub, social hub...)
No automatic sync of twitter, e-mail, etc
I get pretty much zero battery drain when in deep sleep mode.
Of course when using the phone, screen on, Wifi On, autobrightness... battery usage is bigger and you can drain the battery in only 4 hours if you go for it.
Be careful with:
- Live wallpapers, I've seen cases where they remain active all the time
- Apps syncing data on background every few minutes (facebook, twitter, etc)
- Apps uploading a lot of data on background (google+, dropbox..)
- Games that crash and leave the CPU in a high power state until you reboot
Click to expand...
Click to collapse
I am agree with this reply.
If you want to get best battery back-up;
Disable all apps which are working in background, sync n update really eat the phone battery.
I am using my note with active mobile network or wi-fi for a whole day and playing games too without doing this F**KING trick.

The only way battery life gets sucked of Galaxy note is if it doesn't go into deep sleep when not in use.
To all those reporting low battery life: How much battery do you end up losing overnight. ( approx 6-8 hrs)
I typically lose <5 % ( best case scenario has been 1 %)
I had a problem last week and lost 30% overnight and found that it deep go into deep sleep.
and the best solution i found in another thread was to unlock the phone before unplugging from charger
Simply try it: For me normal time between charges is 36 hrs ( battery is near 25% level)

Witches broom battery modification
Battery Lifecycles are connected with the phases of the moon. So you'll get the most out of your battery if you dance at midnight when having full moon spitting five times on your battery.

Many people are of the myth of overcharging n recharging, but its not true wIth lithium batteries, phone will automatically stop charging, if only anything helps its battery calibration,u can do this with a free app called battery calibration, time for the tread to be regarded as close, still useful for noobs
Sent from my GT-N7000 using xda premium

I get great battery life my phone lasts for months on end without dying. I just plug in the charger every night and my battery has not died yet.
Sent from my GT-P6800 using xda premium

sanghaviraj said:
Many people are of the myth of overcharging n recharging, but its not true wIth lithium batteries, phone will automatically stop charging, if only anything helps its battery calibration,u can do this with a free app called battery calibration, time for the tread to be regarded as close, still useful for noobs
Sent from my GT-N7000 using xda premium
Click to expand...
Click to collapse
Cheers...use BatteryCalibration
Sent from my GT-N7000

false low battery issues

Hi,
I have the galaxy s4 for almost 2months and now it has an annoying bug -
I have more than 50% battery and sometimes it get stucked (freezed) and restart itself, and he is failing to reboot until I plug him to the charger.
When he boots up it says that it has 0% battery, even though it had more than a half before it happened
What should I do?

Dead battery?
Sent from my GT-I9505 using XDA Premium 4 mobile app

TheNewLegend said:
Hi,
I have the galaxy s4 for almost 2months and now it has an annoying bug -
I have more than 50% battery and sometimes it get stucked (freezed) and restart itself, and he is failing to reboot until I plug him to the charger.
When he boots up it says that it has 0% battery, even though it had more than a half before it happened
What should I do?
Click to expand...
Click to collapse
i had same problem. your battery is dead. buy a new stock battery and solve this problem

P_A said:
i had same problem. your battery is dead. buy a new stock battery and solve this problem
Click to expand...
Click to collapse
oh, I didnt think it would die so early.. shame on you samsung
can anyone suggest me from where should I buy a genuine battery? most ones at ebay are fake

Me2
Battery Is fully charged. As soos as I unplugged it. The warning appeared. Battery Critically low. Wtf. Phone is less than 2months old.
This only happened twice. Then I let the battery drain completely and recharged it completely. Now it seems fine.
Samsung.....no words.... :thumbdown: :banghead:

I had a friend who had the same issue, recovery showed a correct value.
Anyway, I took off the back cover and the battery was swolen, he got it replaced under his carrier's warranty the next day.
Sent from my GT-I9500 using xda app-developers app

TheNewLegend said:
Hi,
I have the galaxy s4 for almost 2months and now it has an annoying bug -
I have more than 50% battery and sometimes it get stucked (freezed) and restart itself, and he is failing to reboot until I plug him to the charger.
When he boots up it says that it has 0% battery, even though it had more than a half before it happened
What should I do?
Click to expand...
Click to collapse
To recalibrate the battery go to the dial pad, and input x#0228# and a battery status screen will pop up, giving you some information about your battery and such, tap the Quick start, the screen should go off, then come back on might have to wait few secs. and you will notice your battery % might of changed. try doing it a few time until the % stops changing and give you a "real" battery %, then fully charge the battery. should fix any glitches with the battery being read incorrectly. if it doesn't work might mean your battery had it!
From my experience my battery was on 60% after few hours of use, then I recalibrated it and it went down to 20%, fully charged it now my battery lasting a lot longer than before

At least do a battery pull. Don't bother with apps and scripts that wipe battery stats. Do a pull, inspect for leakage, swollen , or damaged areas.
Sent from my GT-I9505G using Tapatalk 4

Thank you guys,
the battery looks like a new one, I cant see any damage on it
kossiewossie said:
To recalibrate the battery go to the dial pad, and input x#0228# and a battery status screen will pop up, giving you some information about your battery and such, tap the Quick start, the screen should go off, then come back on might have to wait few secs. and you will notice your battery % might of changed. try doing it a few time until the % stops changing and give you a "real" battery %, then fully charge the battery. should fix any glitches with the battery being read incorrectly. if it doesn't work might mean your battery had it!
From my experience my battery was on 60% after few hours of use, then I recalibrated it and it went down to 20%, fully charged it now my battery lasting a lot longer than before
Click to expand...
Click to collapse
How can I input the x letter at the dial pad?

TheNewLegend said:
Thank you guys,
the battery looks like a new one, I cant see any damage on it
How can I input the x letter at the dial pad?
Click to expand...
Click to collapse
my bad, was *#0228#. Late night!