Database Develop

battery dies at 20%?

hi i just recently upgraded to the modaco froyo rom. every time my battery percentage hits 20% the phone dies like its at zero thus making 20% unusable. ive wiped the phone, cache, and the battery stats. ive also drained it from 100-20 multiple times to recalibrate the sensors. any ideas?

ian1001 said:
hi i just recently upgraded to the modaco froyo rom. every time my battery percentage hits 20% the phone dies like its at zero thus making 20% unusable. ive wiped the phone, cache, and the battery stats. ive also drained it from 100-20 multiple times to recalibrate the sensors. any ideas?
Click to expand...
Click to collapse
call HTC and tell them you have a broken battery if you truly have performed all of these steps. You can try manually removing the battery stats first though. I forget where the file is or where it's located but you can search around, I'm sure you will find it.

The thing is I've been using the phone for a while and it just statlrted happening

ian1001 said:
hi i just recently upgraded to the modaco froyo rom. every time my battery percentage hits 20% the phone dies like its at zero thus making 20% unusable. ive wiped the phone, cache, and the battery stats. ive also drained it from 100-20 multiple times to recalibrate the sensors. any ideas?
Click to expand...
Click to collapse
ive noticed this at 15% thought it was a one time fluke (flashed a new intersect raven kernel yesterday before work) then it happened today i was going to flash back to the default froyo kernal and see if that did it but now im worried my battery might be screwed

ian1001 said:
hi i just recently upgraded to the modaco froyo rom. every time my battery percentage hits 20% the phone dies like its at zero thus making 20% unusable. ive wiped the phone, cache, and the battery stats. ive also drained it from 100-20 multiple times to recalibrate the sensors. any ideas?
Click to expand...
Click to collapse
Did this happen before you upgraded to Froyo?

Did you update the radio a long with froyo?
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Sent via the XDA Tapatalk App

I noticed that too when I intentionally let it run down to 15%, seems like its a fail-safe if you will of the phone to limit damage to either the phone itself or maybe the battery. I'm just guessing, but its not something wrong with the rom, it seems thats the cutoff point, I could be wrong though...

ian1001 said:
hi i just recently upgraded to the modaco froyo rom. every time my battery percentage hits 20% the phone dies like its at zero thus making 20% unusable. ive wiped the phone, cache, and the battery stats. ive also drained it from 100-20 multiple times to recalibrate the sensors. any ideas?
Click to expand...
Click to collapse
Yep, i have 2 ideas:
1) Read the forum rules
2) Post questions under Nexus One Q&A instead of Android Development.

Mod edit.: not dev related, moved to q&a

Effective Fix
Hey All,
I recently had the same issue with my S4 and I came across a very cheap but effective fix. There is an app on the play store called "Real Battery" that scales your battery level down to the percentage it dies it. My phone kept dying at 30% so I set the indicator to 30% and it scaled my battery level so that 30% is my new 0%. It lets you know more accurately when your phone is about to die, so that you won't be fooled when your phone says it has charge. Check it out, its called Real Battery.

[Q]Battery indicator showing wrong?

The last couple of days I've got a weird problem. When my battery is fully charged everything seems okay and it drains in normal speed (compared to stock).
But when my phone runs out off battery and i start to charge in the beginning everything seems fine.
But suddenly it can go from 75 to 100% in 1 minute.When i look at the stats in MIUI ROM it seems like it's not at same height as it was the last day of 100%. Maybe only 80%.
Sorry for my bad English, but i hope it makes sense.
I've wiped battery stats in CWM. But is it possible that the phone actually is only 80% charged, even though the indicator shows 100% after wipe?
Because if the ROM think the battery is charged and wipe stats it will afterwards only charge to that point and the battery maximum will decrease over days?
If that's possible, how do i full charge the battery? Just leave it in the charger or?
I hope you can understand what I mean.
Thanks in advance

Hello
Does your phone charge to fx 75% and after that doesnt get higher until after you restart the phone?
Sent from my LG-P990 using XDA App

CescMusta said:
Hello
Does your phone charge to fx 75% and after that doesnt get higher until after you restart the phone?
Sent from my LG-P990 using XDA App
Click to expand...
Click to collapse
Yes excactly. But the numbers differs.
Today it charged to 100% though.
Got the same problem?
Sent from my Optimus 2X using XDA App

have you try calibrate your batt again
yes my friend have this problem too, maybe there is software bug

After flashing Celebration HD 2.0.1b I first used Battery Calibration from market to wipe battery stats. Afterwards the battery indicator problems started.
Yesterday i decided to wipe battery stats manually in CWM and drain to phone to 2% before charging, and afterwards I was able to fully charge the phone.
So maybe the bug in is Battery Calibration app?
I decided to install Juice Plotter to monitor the battery and compare it to one build in in MIUI. Just to get some more data.

Hello again
Yes i had the same problem as you, with my previosly 2 lg optimus 2x, and returned them because of the problem you mentioned. I am on the third op2x and luckily this work good
So if i were in your position i would try to go to the dealer and shift the phone with another lg optimus 2x.
Best regards
Sent from my LG-P990 using XDA App

CescMusta said:
So if i were in your position i would try to go to the dealer and shift the phone with another lg optimus 2x.
Click to expand...
Click to collapse
The user said that he started to have problem after a new rom and wiping battery stats, changing phone for that is not the smartest move at all. Is like changing phone because your rom doesn't work.
I have a similar problem, after you wipe battery stats you don't have a reliable indicator, for me the phone took 3 hours to get from 99 to 100%.
I also noticed that my miui ( 1.8.5 same for 1.7.29) doesn't update battery stats when the screen is off so all those plotter don't work, and i think this messes up with the battery indicator (I guess the phone doesn't have enough data to make a decent estimate)
I think is miui + wipe battery stats that can be problematic

I know that but i am just saying that i also had the same problem with the stock rom.
Best regards
Sent from my LG-P990 using XDA App

How old is the battery? How many cycles does it have?
I know from laptop Li-Ion batteries that the voltage vs. capacity is not linear.
When discharging, the voltage will steadily drop to a "wear-level" where it will jump to an almost depleted level. When charging, this "wear-level" will be at the top.
Why I am telling this? Because if this mapping is kept in SW and you wiped it, Android needs to relearn it again. So at 1st complete charging/discharging you would see a % sudden drop/raise, but at the next cycles it would be linear with time (although the total time will be smaller than a new battery).
When laptop/phone battery tips talk about calibration, it is so whoever monitors the voltage (circuit in battery or SW) to know were the wear drop will be, so your estimates to be better.
As an example, I had a very old Thinkpad that did not have any calibration, and it would discharge to about 40% and drop to 5% within seconds. But when charging, it would raise steadily to 70% (from that 5%) but 70% to 95% in seconds. After years of use, that percentage gap would just increase (40-5 got 60-5, 70-5 on discharging).
PS: my current Thinkpad has 4 years and the battery capacity is 49% with 150 cycles. But this one has a nice feature where if the battery was above a certain percentage, plugging AC would not charge it (and thus save a few cycles). I used it set at 70%.
PS: LiIon batteries have cycle count, heat and time as main enemies. Also don't like prolonged (think storage) low charge.

battery on wallcharger screen of error
CenaDK said:
The last couple of days I've got a weird problem. When my battery is fully charged everything seems okay and it drains in normal speed (compared to stock).
But when my phone runs out off battery and i start to charge in the beginning everything seems fine.
But suddenly it can go from 75 to 100% in 1 minute.When i look at the stats in MIUI ROM it seems like it's not at same height as it was the last day of 100%. Maybe only 80%.
Sorry for my bad English, but i hope it makes sense.
I've wiped battery stats in CWM. But is it possible that the phone actually is only 80% charged, even though the indicator shows 100% after wipe?
Because if the ROM think the battery is charged and wipe stats it will afterwards only charge to that point and the battery maximum will decrease over days?
If that's possible, how do i full charge the battery? Just leave it in the charger or?
I hope you can understand what I mean.
Thanks in advance
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Click to collapse
I have when i turn off my fhone and i charge it it shows a battery icon whit an error in it ics lgp990 please help i dont no what tho do

Theory ROM 1.7 battery issue info

Hi All,
I'm a new registered user, so I can't put this in the developer forum yet.
I noticed a problem where I was losing battery power quickly, so I foudn a posting that said to do a "super" wipe. This was to one click recovery to stock, root, bootstrap, then boot into recovery to wipe cache, data, dalvik, format /system, wipe cache, data, install theory ROM 1.7. after clearing dalvik the second time, I threw in a "clear battery stats" for good measure.
What I noticed was this: prior to attempting any of this, the phone reported to be 96% to capacity and said it was "full" so it wouldn't charge any longer. After doing the sequence above, upon initial boot up, the battery was now reporting 88% and was charging again.
It would seem like the mechanism for reporting the battery usage is flawed in some way.

I am running a few days of testing but the calibration methods are to drain fully, and charge (while device is off) to 100%, unplug and before turning on, charge additional. Before my full charge read 95%, on 1.7. I did the above and now it read 100%.
From the beginning, here's how my battery life was:
Day one: full drain with performance mode, I received 8-9 hours. Used maybe 60 mins of voice, email sync w gmail and touchdown, sent about 100-150 texts. Watched 2 episodes of the community streaming from zumocast on 4g radio all day, used Pandora a few times.
Night one: night time saver mode, this is where I discovered my full charge was only 95. My night time mode activates at 10pm, my "full charge" completed at 7pm, used Pandora
On the ride to the gym, had minimal texts, email sync, twenty min phone call, 4g radio on. Went to bed at 10pm left phone idle, no charge. Woke up at 630am night time saver ends at 5am, device reported almost 12 hrs idle time, 40% battery left. Pandora to work, 4g only, synced mail, browsed YouTube, Facebook, no calls. phone full drained around 1140am. So almost 16-17 hrs on one charge, but the high light was 5 hrs from 40% battery... Last to note, I never turned off blue tooth.
Currently, after full charge 100%(not like previous 95) I'm at 1hr26 mins and at 85% bat...same usage, same battery mode
Ill get further results soon.
Update: now at 55%, 3:55hrs on track for about 8-9hrs ... Not using app killers to add or any battery apps. Problem seems sporadic but I'm going to try to run full battery to full drain on performance mode to optimize..in my past experience Droid 1 and Droid x, over time the battery adapts or the phone adapts to the battery usage ... Could be a myth or fantasy ...
Sent from my DROID BIONIC using XDA App

Thanks a bunch for the info. I am in the process of doing the full drain right now. Hopefully, it will show some results.
-Brian

Beefcake550 said:
Hi All,
I'm a new registered user, so I can't put this in the developer forum yet.
I noticed a problem where I was losing battery power quickly, so I foudn a posting that said to do a "super" wipe. This was to one click recovery to stock, root, bootstrap, then boot into recovery to wipe cache, data, dalvik, format /system, wipe cache, data, install theory ROM 1.7. after clearing dalvik the second time, I threw in a "clear battery stats" for good measure.
What I noticed was this: prior to attempting any of this, the phone reported to be 96% to capacity and said it was "full" so it wouldn't charge any longer. After doing the sequence above, upon initial boot up, the battery was now reporting 88% and was charging again.
It would seem like the mechanism for reporting the battery usage is flawed in some way.
Click to expand...
Click to collapse
Our phones read fully-charged at 95 percent, but if you keep it plugged in it will get to 100 - it just takes a good while.

There's a trick to that. Yank the back back cover, pull the battery, and unplug the phone. Plug the phone back in and wait for the "missing battery" icon to show, then slide the battery back in. It will initially read 5%- wait for it to charge to full, which should take 10-15 min. Repeat this process until the status reads 100% charged within a few seconds of putting the battery back in. Reboot into CWM and wipe the battery stats (or use the battery calibration app that's on the marketplace, if you don't use CWM) and you should be seeing a batter that's not only noticably more accurate in its charge level, but also charges more completely, resulting in somewhat better longevity.
You want to drain it fully and let it charge back up fully at least once after this process for best results.

MillionManMosh said:
There's a trick to that. Yank the back back cover, pull the battery, and unplug the phone. Plug the phone back in and wait for the "missing battery" icon to show, then slide the battery back in. It will initially read 5%- wait for it to charge to full, which should take 10-15 min. Repeat this process until the status reads 100% charged within a few seconds of putting the battery back in. Reboot into CWM and wipe the battery stats (or use the battery calibration app that's on the marketplace, if you don't use CWM) and you should be seeing a batter that's not only noticably more accurate in its charge level, but also charges more completely, resulting in somewhat better longevity.
You want to drain it fully and let it charge back up fully at least once after this process for best results.
Click to expand...
Click to collapse
This is a good trick, one I was taught by juhde. I used it on my x2 to great results.
However, I can't get it to read on my bionic. I get the '?' but nothing after I reinsert the battery.
Sent from my DROID BIONIC using xda premium

I find it only works when I unplug it and plug it back in just before inserting the battery. It sometimes also helps to hold down the power button for a few seconds with both the battery and charger out in between 'bumps'.

my fix
I have flashed every update since the first post and had battery issues starting around 1.5. After reading through the dev thread a bunch it seemed as the when performing wipes, they did not come out "clean" after one wipe. So I started at one wipe of each (factory reset, system, cache and dalvik) and the problem persisted. I then did 2 wipes of each, then 3 and 4. after 4 wipes of each all my issues had been resolved. not sure if it will work for everyone but it was the turning point for my device and might be a good starting point for anyone who is as annoyed as i was. good luck!!!!

Update:
Was able to repeat 17 hrs with custom settings: data off @30 min peak/off peak. Blue tooth was on the entire time, cell idle and Bluetooth were 30% consumption each.
Right now I'm in full performance on track to do 9.5 hrs. I've been playing Pandora for an hour every other hour, and did not kill its process.
I think the most practical usage is to cut data when not used for 30 min, I couldn't imagine anyone on their phone doing multiple things for 8+ hrs STRAIGHT. I'm running unleashed 1.7, no radio problems and no slow downs.
Sent from my DROID BIONIC using XDA App

My brother has been getting twice the battery life that I am getting. The only difference is I have rom installed, and he just debloated. I have a switch out extended battery coming from Verizon and if that doesn't work I may just drop back to stock debloated.
Sent from my DROID BIONIC using Tapatalk

I'm at 10hrs 11 min running performance mode, Bluetooth had been on all day. Cell idle 32%, blue tooth 30%, phone idle 25%, display 7% consumption. No data sync interrupts.
Sent from my DROID BIONIC using XDA App

efingguy said:
I'm at 10hrs 11 min running performance mode, Bluetooth had been on all day. Cell idle 32%, blue tooth 30%, phone idle 25%, display 7% consumption. No data sync interrupts.
Sent from my DROID BIONIC using XDA App
Click to expand...
Click to collapse
And your battery is drained? Or at a certain percentage?
Sent from my DROID BIONIC using Tapatalk

I think I have a faulty battery, I can't last 5 hours on a battery anymore. I'm going to go to VZW and see if I can pickup a spare and test that one.

This rom has absolutely nothing going for it. v1.7 and $6 will get you a cup of coffee from Starbucks. I have never flashed to stock as quickly as I did with this rom, since my first smart phone. Is this guy/team the only Dev with a Bionic??
Downloading/flashing on the fly (streamlined) is great however, what are we going to flash folks? 1.8??
Yes I know theory is only playing the hand he was delt but its clearly time to fold.
This makes me nervous.
For the issue regarding battery life..flash back to stock. Wait for the next developer.

volcomguyaz said:
This rom has absolutely nothing going for it. v1.7 and $6 will get you a cup of coffee from Starbucks. I have never flashed to stock as quickly as I did with this rom, since my first smart phone. Is this guy/team the only Dev with a Bionic??
Downloading/flashing on the fly (streamlined) is great however, what are we going to flash folks? 1.8??
Yes I know theory is only playing the hand he was delt but its clearly time to fold.
This makes me nervous.
For the issue regarding battery life..flash back to stock. Wait for the next developer.
Click to expand...
Click to collapse
Yeah? And what was the issue you had? ANY ROM you flash will nuke the battery stats and need to be recalibrated. Simple as that.
Sent from my DROID BIONIC using Tapatalk

kredlash said:
And your battery is drained? Or at a certain percentage?
Sent from my DROID BIONIC using Tapatalk
Click to expand...
Click to collapse
Sorry, yes it was at 5% when posted that, and that was right before my car ride with Pandora playing through Bluetooth.
The end time was 10hrs 35mins.
Since then, I have done a 4x complete wipe, cleared previous traces of unthrottle and flashed 1.7 again, disabled automatic restore apps while synching with google. I used the battery calibration app from the market this morning and have set custom battery management to turn data off every 15 mins of non use. This is practical since the power boost script shortens the time to speed up, so data on/off shouldn't affect performance. I'll update at the end of the work day. Currently at:
85%
1Hr 21mins
Maps 43% consumption (I'm adding GPS on all day in addition to blue tooth all day)
Cell idle 19%
Blue tooth 18%
Phone idle 14%
Sent from my DROID BIONIC using XDA App

I just want to add, I'm absolutely loving this ROM. I would advise to check your steps if you are experiencing problems, and as always, keep in mind that its an ongoing development.
Sent from my DROID BIONIC using XDA App

efingguy said:
I just want to add, I'm absolutely loving this ROM. I would advise to check your steps if you are experiencing problems, and as always, keep in mind that its an ongoing development.
Sent from my DROID BIONIC using XDA App
Click to expand...
Click to collapse
By your justification you are not getting normal/average battery life.
You are disabling data and your cellphone when not in use just to get close to average.
My battery drain has been pretty bad.
I have done all required steps (multiple times) but it still seems like the phone is just flushing the battery out of it.
The best life i have gotten is when (the other day) I was working from home and completely forgot about my phone.
I left it unplugged and after about 8 hours (of literally ZERO use no WIFI) the battery was at around 36%
Its like its pumping it out at full blast no matter what.
Note: I have all powerboost mods installed.

I just flashed back to stock, have the same apps and still getting the same battery life. I am actually getting more network disconnects for some reason, however common sense says that has nothing to do with stock rom or DT rom. Its a driver issue that will be getting resolved in Nov (hopefully) . Flashing back to my sexy DT rom tonight, with a full wipe.
Sent from my DROID BIONIC using Tapatalk

jblade said:
By your justification you are not getting normal/average battery life.
You are disabling data and your cellphone when not in use just to get close to average.
My battery drain has been pretty bad.
I have done all required steps (multiple times) but it still seems like the phone is just flushing the battery out of it.
The best life i have gotten is when (the other day) I was working from home and completely forgot about my phone.
I left it unplugged and after about 8 hours (of literally ZERO use no WIFI) the battery was at around 36%
Its like its pumping it out at full blast no matter what.
Note: I have all powerboost mods installed.
Click to expand...
Click to collapse
I don't really understand what people are trying to solve.
Your problem is you left your phone on performance mode and it drained your battery. That's like leaving you car lights on and expecting it not to drain the battery. I'm exhibiting extreme heavy usage vs normal practical usage and how the ROM does *not* affect it negatively relative to your daily usage of the phone.
In my normal day, I would not have bluetooth running all day, which from my above data consistently drains 30% of the battery. Bluetooth is only used when I'm in my car which it connects to the car audio for phone and music. In my normal work day, I would not have GPS running all day, which from my recent post is draining 43% of the battery. In a normal week, I would only need to use GPS to find a unique restaurant that maybe I haven't been to or in an area I am not familiar. The main point for the contribution in this "battery investigation" is that I am not experiencing any radio loss, connection failure, or system lag by having Data shut off.
I really do not see the occassion that anyone would ever use their phone heavily for 20+ hours straight. Or even more than a movie's length straight. I could think of possible arguement points such as hiking and needing it to last for saftey/emergencies -- but why would you have it full blast on performance? Long car rides -- but if you are doing an 8+ hour drive, don't you plan on having a car charger? I just don't get what people's frustrations are. I do understand the problem that people's battery tick abnormally which is a fault of either the device, a defective battery, or lack of following directions when using the ROM. Again, the ROM is a development, and no one is forcing you to use it. It is actually quite nice to test, run into a problem, report it and have it fixed within days/weeks instead of months or never like the stock.
I guess I've rambled into a rant, but I'm merely providing my own experience in details so that people have a general feel of how the battery is and if my usage is similar to theirs.
I'm not claiming to have average/above average battery life, I'm justifying that this has not affected my daily use of the phone for everything that I use it for (being connected to work, being socially connected, and games/movies/music).

Extreme Battery Drain

Hello, it's me again with problems. I have an extremely battery drain, even Juice Deffender can't handle on this. When I put the phone on charger, when he turns off after 0 % battery status, indicator shows me 50 % min after only few seconds on charger, and it's fully charged for half an hour maybe. When I turn on 3g and connect to Net, from 100 % to 0% is ONLY 15 min ?!?! I have cm-7-20120812-NIGHTLY-cooper ROM, but when I had offical 2.3.6, it was the same problem. Can I check some-how what is the problem- software, calibration or battery? I did a few calibration without any success. I'm really sorry on my very bad English. I will be grateful if anybody can redirect me on the right topic. Thanks in advance

3G eats a huge battery. I would not expect anything nice from it. But seems that your problem is a bit more problematic. How long do you have your phone?

Make sure you are charging your phone until its actually full not just when it says 100% look here for more details:
http://forum.xda-developers.com/showthread.php?p=28658849

Did you try wiping battery stats in CWM or recalibrating it?

I've tried wipe stats with Battery Calibration, and with CWM wipe battery stats. I've tried different ROMs, DroidACE, official 2.3.6, cooper nightly ROMs, and all of them have same problem. I've noticed that the battery is a little thicker in the middle, before it was flat, and now is a little convex in the middle. I've tried also discharging and charging for a 5+ hours, didn't help me. literally be emptied by 20 min of Use

wabafet89 said:
I've tried wipe stats with Battery Calibration, and with CWM wipe battery stats. I've tried different ROMs, DroidACE, official 2.3.6, cooper nightly ROMs, and all of them have same problem. I've noticed that the battery is a little thicker in the middle, before it was flat, and now is a little convex in the middle. I've tried also discharging and charging for a 5+ hours, didn't help me. literally be emptied by 20 min of Use
Click to expand...
Click to collapse
Sheesh guys. Battery Calibration doesn't affect battery life on your phone. It's just for accurate readings -_-"

wabafet89 said:
I've tried wipe stats with Battery Calibration, and with CWM wipe battery stats. I've tried different ROMs, DroidACE, official 2.3.6, cooper nightly ROMs, and all of them have same problem. I've noticed that the battery is a little thicker in the middle, before it was flat, and now is a little convex in the middle. I've tried also discharging and charging for a 5+ hours, didn't help me. literally be emptied by 20 min of Use
Click to expand...
Click to collapse
Yeah man, Ive got the same problem.
If I charge it for about 3-4 Hours, I get a max of 5 Mins or so, with Wi-fi on.
When the Battery is about 10%, and I put it to charge, It immediately says 99% charged.
I've changed 2 roms, and still no effect, infact, its got worse.
Even Juice defender (even the ultimate version) dosent work, Not even Underclocking.
I saw the battery recalibrating thing and Ive wiped the battery stats, still no use.
I think there's a problem with the battery itself?
Im just sick of it.

Alpha que said:
Yeah man, Ive got the same problem.
If I charge it for about 3-4 Hours, I get a max of 5 Mins or so, with Wi-fi on.
When the Battery is about 10%, and I put it to charge, It immediately says 99% charged.
I've changed 2 roms, and still no effect, infact, its got worse.
Even Juice defender (even the ultimate version) dosent work, Not even Underclocking.
I saw the battery recalibrating thing and Ive wiped the battery stats, still no use.
I think there's a problem with the battery itself?
Im just sick of it.
Click to expand...
Click to collapse
I also think that the battery itself has a problem, not any ROM. I'll go to service for a few days and I'll tell you about what was the problem.

wabafet89 said:
I also think that the battery itself has a problem, not any ROM. I'll go to service for a few days and I'll tell you about what was the problem.
Click to expand...
Click to collapse
Yeah, I suspect it is a problem with the battery.
Anyways, thanks man

If it's deformed, then your battery's life is over, that's it, get a new one.
You can try the freezing method to try and squeeze it for a bit of juice:
Charge to 100, Plastic wrap, in the freezer for maybe an hr (not too long), take it out, put it in your phone, charge it till it says fully charged, turn on your phone and check duration.

seems a deep sleep issue

Just abuy a new battery. I suggest a Anker branded one. Search a battery review topic at the Accesoires section. If you buy the Anker 1400mAh, your battery life will be even better than the original battery life. And Anker is trusted and cheap.
http://forum.xda-developers.com/showthread.php?t=1783344

I listened to your advice and bought a new battery, now I'll see what was the problem, battery or maybe hardware/ROM. I'm charging it now. Any advice how to charge new battery? Advice for scripts or ROMs? I'm going to use nightly cooper cm 7.2 and juice deffender. What about cm9 and this model?

wabafet89 said:
I listened to your advice and bought a new battery, now I'll see what was the problem, battery or maybe hardware/ROM. I'm charging it now. Any advice how to charge new battery? Advice for scripts or ROMs? I'm going to use nightly cooper cm 7.2 and juice deffender. What about cm9 and this model?
Click to expand...
Click to collapse
Since we're in 2012, I'm guessing it's a lithium ion battery.
Just plug it in and wait for some time (~15 minutes)after it reaching 100% to actually fully charge.
It would be best if you don't let it discharge below 20-30%.
Read more about lithium ion batteries by searching around the web for more info.

wabafet89 said:
I listened to your advice and bought a new battery, now I'll see what was the problem, battery or maybe hardware/ROM. I'm charging it now. Any advice how to charge new battery? Advice for scripts or ROMs? I'm going to use nightly cooper cm 7.2 and juice deffender. What about cm9 and this model?
Click to expand...
Click to collapse
So, How did it go?
Was there a problem in the battery?
or, is something wrong in the phone?

there was a problem in battery, I bought a new battery, not Samsung, but also has 1350 mAh capacity, and it's 2nd time on charging, life is about 2 days of using, average 2-3 h 3g, and playing games, half hour voice and maybe 30 sms and mails, and for me this is a very huge improvement from 15 minutes before death battery. Cheers, sorry again on my bad English

wabafet89 said:
there was a problem in battery, I bought a new battery, not Samsung, but also has 1350 mAh capacity, and it's 2nd time on charging, life is about 2 days of using, average 2-3 h 3g, and playing games, half hour voice and maybe 30 sms and mails, and for me this is a very huge improvement from 15 minutes before death battery. Cheers, sorry again on my bad English
Click to expand...
Click to collapse
Hmm, I did get slight improvement once i calibrated using another app.
But Im still getting a new battery

anyone knows why phone's display blink-up randomly? I saw that earlier, and I thought that was because of battery, but obviously, wasn't that. It's totaly random. And, I have another question, I've played with *#*#4636#*#* code, and sometimes phone can't receive or sent messages, except when preffered network type is GSM only and only after turning on and again off airplane mode. I have cooper cm 7.2 newest nightly ROM.

wabafet89 said:
anyone knows why phone's display blink-up randomly? I saw that earlier, and I thought that was because of battery, but obviously, wasn't that. It's totaly random. And, I have another question, I've played with *#*#4636#*#* code, and sometimes phone can't receive or sent messages, except when preffered network type is GSM only and only after turning on and again off airplane mode. I have cooper cm 7.2 newest nightly ROM.
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I had the same issue when I was using Elegant white by TAZ.
But Then I flashed a fix for it.
I suggest you should too get in touch with the dev.
But first, flash the rom again.

Alpha que said:
I had the same issue when I was using Elegant white by TAZ.
But Then I flashed a fix for it.
I suggest you should too get in touch with the dev.
But first, flash the rom again.
Click to expand...
Click to collapse
Thank you. Anyone knows where is the official topic for cm 7.2 nightly cooper? I found one topic in development section, but at the end of it someone wrote that topic is closed on developer's request. And where I can find changelog? I saw that there is newest nightly update from 19.8. http://download.cyanogenmod.com/?device=cooper

Rebooted and battery went from 45% to 10% WTF

Anyone ever heard of this? What the hell is that about?
Thanks

Happened to me all the time.
Sent from my GT-N7000

Has happened to me many times on both phones. I'm guessing battery calibration goes bad and when reboot it tries to adjust. Also note that when this happens, battery will slowly recover as if the phone is charging. Say it dropped to 10%, leave the phone aside after the reboot, battery will increase to somewhere around 20%. I've had this problem on the stock ROMs of both Note and the SGS II. Hope this helps.
--
Sent via XDA Premium from SGS II

Try calibrate your battery by letting it blackout then take out your battery for two minutes then put it back again, dont reboot yet, let it charge to full, then go directly to CWMR and wipe battery stat and reboot.
Sent from my GT-N7000 using xda premium

same here, happened to me a few times.
Does battery calib really work or its all a myth??

I don't know to consider this a bug, or what.
But.. battery calibration won't help. I've tried.
On my device, it happened :
*) when my device got very hot (when use certain kernel), I reboot, then voila.... the battery drop around 20-30%.
At first I said WTF... then I faster charge (because at that time, after drop, my battery left only 1%)
The next time happened, I was on the road, and can't charge my handphone. So I just leave it there, laid in my bag.
Surprisingly, after some times, the battery start to increase again, though it's not coming back to the same percentage as before it drop.
So is it a bug ? Perhaps... but only happened when your device got very hot.
And when your device is very hot (under certain kernel), and you never reboot / switch off first, you will see that the battery flow like water.
But when you switch off, let it cool, then boot up again, the battery will stagnant at the same percentage when you switch off. Go up and go down at the same percentage for minutes to 1 hour+.
So you want to consider this is a bug ? perhaps, but.... not everytime happen. So long as you are on the correct kernel that suit your device.
:victory:

Huge drain may affect the stats.
The percentage is calculated based on the voltage of the battery. On heavy drain the voltage may drop unpredictably (for the ROM). Also, the temperature will affect the voltage (thus percentage).
With my phone if happened only once, the night after update to LRQ so I assume this is connected to battery stats.
But also, certain ROMs can affect this behavior.