Database Users

[Q] 77% battery down to 9% after reboot

Today I was going to browse the web and the phone decided to freeze. The bottom light were on, but would not do anything. Hit the back arrow and nothing. The screen was black as well.
At that time I had 77% battery, and decided to just reboot the phone. I hit the power button, rebooted and then once it rebooted the phone said charge battery and was at 9%. I was like...WTF? So I decided to reboot again and then I got 27%
The phone is at 27% now and never went back to the 77% before it was frozen and I rebooted.
Does anyone know what caused this, or why it would have done this? Seems odd to me it can be at 77% and then go to 9% doing nothing but a reboot after frozen. Not only that, rebooting again took it to 27%
I haven't the slightest idea where to begin.

this has happened to me after rebooting sometimes for flashing kernels, no idea why

fastmikey1969 said:
this has happened to me after rebooting sometimes for flashing kernels, no idea why
Click to expand...
Click to collapse
Flashing eats up battery, that's why they usually say make sure you have a good charge beforehand.
As to the OP, same stuff happens to me too :/ still not sure why
Sent from my SPH-D700 using XDA Premium App

Happened to me a lot also. Thank god I have multiple batteries. Happened a lot more when DI18 was just starting to get custom roms/kernels

Ditto - has happened to me once. Last week.

this has happend to me as well....not sure why....
but what's funny, it seems just the battery gauge (i have tried 3 of them) gets messed up...
few days ago i was at 65%, rebooted and came back at 14%.... i surfed the web for 30min and it stayed at 14%....obviously it must had dropped...
only displayed properly after it fully charged overnight to 100%.

Hmmm....Had no idea there would be people with this problem. So looks like we are all clueless.
I do have a custom Kernel and Bonsai, but this is really the first time this has happened, so there has to be a glitch with something but I am just not sure what.
More than likely my guess would be something with either an app, or a kernel and setcpu, but it's a wild guess.

I've had this happen to me before, several times in fact, while using custom roms while on DK28. Most recently with Bonsai.
Never happened with the stock tho.

Same Here
it has happened to me before.....havent the slightest idea why

This had been an issue that was one of the many things not fixed in eb13, the reboot mod can bring the worst out in it in my experiance too. After a few times of happening and a few drains/charges it hasn't happened since, but keep a spare battery or charger on ya just in case
Sent From My Epic Bonsai Tree

This happened to me today as a matter of fact. And this of what it looks like in juice plotter. I'm not sure about the gaps but notice it goes straight down then straight up after another reboot. It then jumps up again after I plugged it in to charge.
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Sent from my SPH-D700 using XDA Premium App

lol that **** happens to me ALL THE TIME!
Sent from my SPH-D700 using XDA App

I really really like the Bonsai ROMs but (for me) I noticed this ALOT while using the Bonsai DK28 builds... Very frustrating. When it freezes up, do a battery pull..
I did not have it happen (to me) using stock (rooted) EB13, nor have I had it happen (yet) using the ACS frozen build w/ OC/UV kernel. To be fair, I've only been running the ACS ROM/kernel for a week.
You can tell when it's gonna lock up though too if you pay attention, the phone starts to lag, data gets all wonky, almost like a car sputtering and running out of gas.. if you can catch it during this 'wonky' time, reboot or do a battery pull, it can save some frustration.
Something is causing it and I'm wondering if we can get a logcat before or during the 'happening' ?
Just curious

Looking at my phone this morning, I can say that something is making the battery read as if it was lower than it was.
Here is what I got. It happened when I was shopping yesterday around 3:45pm.
I came home, saw it was at like 29% down from the 77% and didn't use it much. I did check twitter and for a few updates, but that was it.
It was around 10:45pm and guess what? The phone STILL SHOWED 29%
I thought to myself...now how in the world can it still be that and not drop 1%? Something must be making it show that when it is actually much higher. Maybe it went from 77% down to 55%, but the display shows 29% even when it isn't.
Decided to leave the phone unplugged while I went to bed. Got up a few minutes ago and guess what? 8hrs and 45min off the charger at the 29% and guess where it is?
Yes, 29% still. So from 3:45pm till 7:15am it is still showing it is at 29% battery. No way that is correct in any way. The phone has been unplugged for 36hrs.
15hrs of it being unplugged it was showing 29%. I thought when I got home that surely the battery would just keep dropping and never moved 1% in 15hrs.
So at 36hrs, you can tell it is great battery life, but that gauge is TOTALLY wrong and off, and something caused it to go haywire. I am starting to think it is the Kernels we are using with the overclock/undervolt. This is my only guess as I was using Bonsai 2.0 for the longest time and had no problems.
The only other thing installed aside from programs was the custom Twilight Zone Kernel.
I did just get on the web and the 29% went down to 25% in like 60 sec, so if it can go down 0% in 15hrs and then all of the sudden 4% in one minute, you know something is totally wrong battery wise.

When this has happened to me before, I was able to pull battery and restart and it went back up about 60%

heathmcabee said:
When this has happened to me before, I was able to pull battery and restart and it went back up about 60%
Click to expand...
Click to collapse
Just pulled it and it went down to 19% from the 25% before I pulled it.
Where the hell all of these crazy % come from is beyond me. I wish I new why it couldn't just all be correct.
Oh well, the Nexus S 4G may be coming out, so who knows. Maybe i'll sell this phone and get one. (We can thank Samsung if this happens with people)
However, I am SO GLAD we have devs to try and fix things and make things better that Samsung never could do.
Since it is a rare occurrence, its not that big of a deal. I just wish I knew why when the phone freezes and we reboot, the battery decides to bite the dust.

While we've all probably experienced the loss of significant battery after reboot, yesterday I had the opposite happen.
I was down below 10% battery left, rebooted and then had 42% battery left. I did recalibrate after flashing genocide last week, so I'm a little confused about this one.

Clear batterystats in CWM. Worked for me when I was ok DK28.
Sent from my Froyo'd Epic using XDA App

I was all excited to see major improvement in my battery life. Went for 24 hours of modestly active use and battery only went down to 39%. Read this post, rebooted and now I'm at 9%!

nerdtaco said:
Clear batterystats in CWM. Worked for me when I was ok DK28.
Sent from my Froyo'd Epic using XDA App
Click to expand...
Click to collapse
Second this. Sounds like a battery calibration is needed.

The Xoom has awesome sleep time!

Been too busy w/work to spend time w/my baby. But had time to play with her tonight and just wanted to show how awesome the idle drain is on the Xoom.
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Yeah it is great. I generally lose 0-1% on 8 hours of standby with WiFi on.

yea and yours is stock right? imagine what we can get out of it with more reliable battery saving kernels

It's awesome although I never very high tablet idle because I have a bunch of crap running in the background - GMail, 3 IMAP accounts every 10 mins, Twitter every 15 mins, Facebook every 30 mins, etc etc.
I still get about 8 hours of standby on 10% of battery with WiFi. When I'm on 3G though it drains a lot quicker.

bronxknight28 said:
yea and yours is stock right? imagine what we can get out of it with more reliable battery saving kernels
Click to expand...
Click to collapse
100% stock and not even rooted & yes, my wifi is on 100% of the time!

click on the graph and you will see additional information that will rock your mind.

Why don't you use your Xoom instead of letting it sit idle???

Neo3D said:
100% stock and not even rooted & yes, my wifi is on 100% of the time!
Click to expand...
Click to collapse
when you say wifi on 100% you mean you have the disconnect policy set to never (last option)

z06mike said:
Why don't you use your Xoom instead of letting it sit idle???
Click to expand...
Click to collapse
I laughed.

yea i love it also. If you underclock it like around 912 or 760mhz then you get pretty good battery life for the whole day. If you play any games or watch any videos then you can always go back up
Sent from my Xoom using Tapatalk

I was playing gun bros last night. Played for about an hour but then stopped and got caught up to something else. I didn't quit the game either. I totally forgot I was playing it until recently. The game was on for a whole day. 50% of juice still left
Sent from my Nexus One using XDA App

One thing that caught my eye which seems to not be a problem as it was on my htc incredible is that something (app related) is keeping my xoom awake. For example the xoom batter says its been on for 4 hours and the awake time (under system status) says 4 hours. I couldnt figue out which app was causing this so I did a test to see if this awake time was actually draining battery as it was on my incredible.
In short I charged my battery to 100% before going to bed and restarted xoom to start from 0hours awake and 0hours battery use. Checked it 8 or 9 hours later and saw that my awake time was exactly that of battery use time however my battery read 100% with that much time being awake (by app).
Thus the awake time although drained my incredible does not impact my xoom enough to really care about. Hopefully this may help if anyone else is OCD about awake versus sleep times.

jland22 said:
One thing that caught my eye which seems to not be a problem as it was on my htc incredible is that something (app related) is keeping my xoom awake. For example the xoom batter says its been on for 4 hours and the awake time (under system status) says 4 hours. I couldnt figue out which app was causing this so I did a test to see if this awake time was actually draining battery as it was on my incredible.
In short I charged my battery to 100% before going to bed and restarted xoom to start from 0hours awake and 0hours battery use. Checked it 8 or 9 hours later and saw that my awake time was exactly that of battery use time however my battery read 100% with that much time being awake (by app).
Thus the awake time although drained my incredible does not impact my xoom enough to really care about. Hopefully this may help if anyone else is OCD about awake versus sleep times.
Click to expand...
Click to collapse
IIRC, I read a post somewhere here saying this awake problem was caused by the WeatherBug app (IIRC that is ).

ClydeB1 said:
IIRC, I read a post somewhere here saying this awake problem was caused by the WeatherBug app (IIRC that is ).
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Click to collapse
Yeah I read that as well. I dont have weatherbug though! I dunno what it is, I tried deleting apps and testing and couldnt find the culprit. Seems to not impact the battery whatsoever as I tested it overnight with 100% battery charge and woke up with 100% battery despite being awake all night.
The only thing that stays awake in my running services it seems is my android keyboard so it may be related to that or an app keeping my keyboard awake. All other processes are consistant with the screen on time.

ClydeB1 said:
IIRC, I read a post somewhere here saying this awake problem was caused by the WeatherBug app (IIRC that is ).
Click to expand...
Click to collapse
Weatherbug sure is full of bugs . In fact I used it and deleted it.
Sent from my Xoom using XDA App

It's the latest CNN app, it launches a service which keeps the XOOM awake. It shows up as Android System. If your Android System awake time is high it's CNN.

mobilehavoc said:
It's the latest CNN app, it launches a service which keeps the XOOM awake. It shows up as Android System. If your Android System awake time is high it's CNN.
Click to expand...
Click to collapse
Yep CNN for me too. Its only if u use the widget though it seems. Using the app normally doesn't cause the wakelock.

I'm using Weatherbug on my wifi only Xoom without any problems. I haven't tried the widget, maybe that's where the problem is.

poisike said:
I'm using Weatherbug on my wifi only Xoom without any problems. I haven't tried the widget, maybe that's where the problem is.
Click to expand...
Click to collapse
Yep its the widget problem. It drains battery.
Sent from my Xoom using XDA App

z06mike said:
Why don't you use your Xoom instead of letting it sit idle???
Click to expand...
Click to collapse
cuz i been crazy busy at work taking care of bugs before our release next week! by the time i get home, i just wanna eat shower and go to bed

Horrible battery life on ef02

Ef02
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Ee03
Sent from my SPH-D700 using XDA App

Wow, I'm getting bad battery life on EF02 too, but not THAT bad. Are you solely testing in a no signal zone?

nimaim said:
Wow, I'm getting bad battery life on EF02 too, but not THAT bad. Are you solely testing in a no signal zone?
Click to expand...
Click to collapse
My house
Sent from my SPH-D700 using XDA App

I had the exact same problem on EE03. Couldn't get 8 hours using wifi and the phone in sleep and I live near a tower (never have less than full bars).
Suppose this explains the delay and EF10.

Tandrew86 said:
I had the exact same problem on EE03. Couldn't get 8 hours using wifi and the phone in sleep and I live near a tower (never have less than full bars).
Suppose this explains the delay and EF10.
Click to expand...
Click to collapse
My ee03 was great
Sent from my SPH-D700 using XDA App

marcusant said:
My house
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
that sucks ... everything is great about the ROM except for battery life (and I guess some of the other crap they still haven't fixed like the physical keyboard lag, grr). It's faster for me than most of the deodexed ROMs I've tried that took out all the Samsprint "bloat".

Wow... I his noticed that my rom somehow fixed the system apps bug...
Sent from my SPH-D700 using XDA App

Odd, I left GPS and wifi on took a nap, five hours later and I'm still at 100%. Of course GPS is not working for me, so now I have to go through that whole rigamorale of getting it to work. Oh yeah I'm on the EF10 modem.

Huh, I had the phone running for 5 hours in a real poor signal area after I flashed EF02 and at the end of the night I was still at 70%. Today I'm going through the usual battery calibration stuff so I won't know for sure for another day or two, but initially it seems pretty good on my phone, (using EF02 modem).

Hm that's weird with 2 hours of usage screen on for a little more than an hour, wifi on the whole time and I still have 79%
Sent from my SPH-D700 using XDA Premium App

Same for me. My phone was almost dead after a long night of sleep. I went back to srf. Stock rom's are boring too

marcusant said:
My ee03 was great
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
My EE03 was killer until I started messing with themes and then it went to ****. EF has been ok so far.
One other thing I noticed is that when you have your phone plugged into the computer and not the wall it doesn't see it as being plugged in even though it's charging. At the moment I have it plugged into my laptop so it's obviously charging but my screen shows it being on battery for 38 min 52 sec

that doesnt display if you put on charge thats highly unlikely to get 7 hours and still @ 100%

XxLostSoulxX said:
that doesnt display if you put on charge thats highly unlikely to get 7 hours and still @ 100%
Click to expand...
Click to collapse
It's not unlikely it's impossible. Looks like a display bug to me.

XxLostSoulxX said:
that doesnt display if you put on charge thats highly unlikely to get 7 hours and still @ 100%
Click to expand...
Click to collapse
Dulanic said:
It's not unlikely it's impossible. Looks like a display bug to me.
Click to expand...
Click to collapse
Or an uncalibrated battery meter. The first battery cycle after a flash can give you some wonky stats, I usually run a calibration and at least one more full charge/discharge before I can pass judgement on battery life.

I seem to be getting IMPOSSIBLY good battery life on this. I've had it off charger for 3 hours + and have been using it like crazy installing apps and configuring. I'm still at 75%.
I fully charged and ran battery calibration when I got up. Who knows, maybe it'll drop 50% in the next hour, but for now, this is stunning!
PS I'm also getting like 15% phone idle, so I don't know if that's accurate.

My battery life is pretty bad too
"The greatest respect you can earn is self respect" Louie Simmons

Hmmm ... EE03 Sucked for me but this is great ! yesterday after 5 hours of no wifi and maybe 3 phone calls and a little browsing in the market i still had 88% ....

It seems that every once in a while something goes rogue in the background and uses 99% cpu that systempanelapp can't see but if I use the memory clear button in the built in task manager and cpu goes back to 2%. Weird
Sent from my SPH-D700 using XDA Premium App

i been on battery for 27 minutes and the battery % is at 78% WTF

BIG battery problem

Hy everyone,
after i change rom to cyanogenmod7 my battery life is very bad. Here is what i did...
Rooted, installed CM7, battery was bad, restarted battery stats (i red it somwhere on this forum that whan changing rom battery stats have to be restarted), before that restart battery was, well not good as in stock froyo, but average... after that it is terrible. In just 6 and half houers when i was sleeping it was drained 33%, and after i wake up and use phone, in just 15min it loose 10%. When i looke at 'what use my batteru' cell standby is 45%!! Thats not normal, right? How to fix this isue?
Sent from my HTC Wildfire using XDA App

have you try to reset the battery stat?

It looks like you reset battery stats when you weren't on full battery.
Only reset when calibrating battery, and your battery is full.
Sent from my SPH-D700

It was full, than disconected from charger, than restarted battery stats, after that drained completly and charged to 100%.
Sent from my HTC Wildfire using XDA App

Might have had a bad flash then, unless your battery is still setting in, give it a few cycles and it should start to give you better battery life
Sent from my SPH-D700

And don't keep the minimum cpu frequency value to high. Because the phone doesnt need a huge frequency in standby mode. That also matters.
Sent from my HTC Wildfire using XDA App

CPU is set by default... also i need to say that its charging extremly fast (i can see progress while im typing this post, 4%).
Sent from my HTC Wildfire using XDA App

ilDuceo said:
CPU is set by default... also i need to say that its charging extremly fast (i can see progress while im typing this post, 4%).
Sent from my HTC Wildfire using XDA App
Click to expand...
Click to collapse
Then yeah you need to charge your phone while on to 100%, turn it off till its complete again, the reset batery stats and use it till it dies and it should be good.
Sent from my SPH-D700

Ok, ill try that now. Hope it will help!
Sent from my HTC Wildfire using XDA App

Got the same problem . Yesterday I went to sleep around 12:00 with 49% battery left and in the morning around 09:00 just 6% was left. I will try above tip
@ilDuceo: any improvements on ur battery?

faraaz said:
@ilDuceo: any improvements on ur battery?
Click to expand...
Click to collapse
I recalibrate it again... now its lil bit better when im not using phone and wifi/data are disabled. But, when im using wifi it still sucks!:\ For now i will stay at CM7 cause i like it very much, but im thinking about geting back to my old FroYo.

ilDuceo said:
I recalibrate it again... now its lil bit better when im not using phone and wifi/data are disabled. But, when im using wifi it still sucks!:\ For now i will stay at CM7 cause i like it very much, but im thinking about geting back to my old FroYo.
Click to expand...
Click to collapse
I also recalibrated the battery and reverted back to stock froyo rom (with overclock kernel and I removed a bunch of system apps). Battery seems to last a lot longer now

Another solution would be a 3000mAh battery i saw somewhere.. phone gets a little bit thicker, but its perhaps worth it?

faraaz said:
I also recalibrated the battery and reverted back to stock froyo rom (with overclock kernel and I removed a bunch of system apps). Battery seems to last a lot longer now
Click to expand...
Click to collapse
I will try that. What kernel did u use for that? And how did u remove system apps?
But must say, 23h 18m since of the charger and battery is 41% with some wifi/data, 12-30 sms and few cals. Still not good as FroYo, but not so bad as before recalibration.

For the first few runs after new ROM and batstatts try to have some full cycles
Sent from my HTC Desire S using Tapatalk

ilDuceo said:
I will try that. What kernel did u use for that? And how did u remove system apps?
But must say, 23h 18m since of the charger and battery is 41% with some wifi/data, 12-30 sms and few cals. Still not good as FroYo, but not so bad as before recalibration.
Click to expand...
Click to collapse
infinity mc4 kernel. you can remove system apps with Titanium backup (button backup/restore -> select app -> un-install). Look out that u don't remove apps that are active used by the ROM. I have deleted like 30 apps + widgets.
yesterday same time, like in my post above, from 99% to 97% with wifi/data on. So much better!!

faraaz said:
I also recalibrated the battery and reverted back to stock froyo rom (with overclock kernel and I removed a bunch of system apps). Battery seems to last a lot longer now
Click to expand...
Click to collapse
What SetCPU values do you use?
I have the same battery draining problem since I flashed WildPuzzleRom and I think of going back to stock ROM...

Over the last month or so ive tried various roms nightly's etc and the most i got out of the battery was around 15 hours with the batt stats fix, froyo on the other hand different almost 36 hours at the best and worst still around 18.

Just found my old one dead
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Sent from my HTC Sensation Z710e using XDA App

My battery life is strange. Once it can handle 6 days without charge(i put it charging at 15%) using wifi, alot of dialing. Second time it handle only two days without using it. Last time it handled 4 days with same dialing and wifi.
I am using Cyanogenmod 7, Smartass governor, min cpu=245mhz, max 710mhz.

wtf is going on with my atrix down to 30% after jus 4 hrs.

so my girlfriend took my phone to school at 7 comes home at 11 nd my battery was that orange-red color i check my stats nd it shows this
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Sent from my Atrix-4G, stock 2.3.4 (rooted)

I have that same issue. Rooted Bell 2.3.4. I don't know wtf is going on, but these past few weeks my phone battery just started too **** the bed. lm going too battery calibrate when l have the time. Might need one yourself too?

DopeHack said:
so my girlfriend took my phone to school at 7 comes home at 11 nd my battery was that orange-red color i check my stats nd it shows this
Sent from my Atrix-4G, stock 2.3.4 (rooted)
Click to expand...
Click to collapse
There's about 2 solid hours of screen time there, I wouldn't consider that too crazy. Did your gf realize the screen was on all that time? Your idle drain doesn't look great, try better battery stats and/or watch dog (mixed reviews).
Sent from my Supercharged CM7 Atrix

Watchdog is awesome, a must have! But yeah if you haven't calibrated you need to.

Wifi + screen on = loads of watching YouTube clips online while many apps using wifi open will definitely kill your battery.
Sent from my MB860 using XDA App

Yeah.. after root my battery has gone HORRIBLE!!!!! Every time I check my phone, I get my messages then + 10% each other time (like every hour)
Sent from my MB860 using XDA App

CM7 + juice defender pro + misc power centric tweaks... My battery drains 4-8% at night, lasts all day with normal use. And then some.
Admitedly im a minimalist though. I tore out a lot of cm7 and its already core.
Toggle background data off when not in use too. There are a lot of smaller power tweaks though, its a science and takes tweaking.
Whip that power junkie 'rix into shape!
Ps: lol! And that gps youre running destroys power.
Sent from my MB860 using xda premium

I had horrible battery life (10% every hour) as well until i flashed the latest Orange UK radio and all of a sudden my battery lasts for two days without charging. Note that wifi is off most of the time and u only use my phone to listen to music on the go, send txt messages all day long and at the end of the day i have around 70%+ battery left.
Sent from my MB860 using XDA App

battery draining too fast!!!!
hey guyz..im new to xda..
like a week ago i deleted a system file on my atrix 4g and it started to give some force closes errors..so i flashed a new custom rom named " homebase " my phone is so fast and i like it bt my battery at the same time is draining so fast last night i recharged my phone and it didnt complete till 100% it sticked at 96% anw i worked for a little bit on my cell phone then left it and went to sleep,,and this morning it was like 63%..i jst need some help is there anyone that can help me with this kind of problems..
thx anw hope someone will know about my issue i realy need help...thx again

Try UV and underclocking for screen off.
I have amazing battery life. (Darkside 2.3.5)

Jibraldor said:
Wifi + screen on = loads of watching YouTube clips online while many apps using wifi open will definitely kill your battery.
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Umm how can she watch YouTube that much in school ? Ill end that one there. And @fishcwrap even if it was its timer is one minute nd my brightness all the way down even if ur contantly texting my battery doesn't die that fast nd she said she only used it to Google something once nd that was it I honestly think it has somethin to do wit the radios
Sent from my Atrix-4G, stock 2.3.4 (rooted)

xhazk said:
CM7 + juice defender pro + misc power centric tweaks... My battery drains 4-8% at night, lasts all day with normal use. And then some.
Admitedly im a minimalist though. I tore out a lot of cm7 and its already core.
Toggle background data off when not in use too. There are a lot of smaller power tweaks though, its a science and takes tweaking.
Whip that power junkie 'rix into shape!
Ps: lol! And that gps youre running destroys power.
Sent from my MB860 using xda premium
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I don't have a data plan so the bg data is always off and GPS has not been on since the day I opened the UPS box its weird how airplane mode my battery would prolly last an entire week
Sent from my Atrix-4G, stock 2.3.4 (rooted)