Okay, I know this won't improve battery life in the end, But is it good to run one of those apps after doing a fresh ROM wipe? I know that if you don't, It can report false battery readings and cause it to appear to be dying faster than normal, etc.
What's a good app to use? Is it worth doing, or even needed?
Most if not all recoveries have a battery stats wipe included. Some ppl recommend doing it every time you flash a new ROM, but that's overkill and completely unnecessary. Certain ROMs will even just calibrate it themselves. I haven't noticed an improvement using it on either of the devices I've used, but if it makes you feel better charge it all the way, turn off the phone, replug the charger until the LED goes green again, boot into recovery, wipe battery stats and then let the battery discharge ALL the way.
Sent from my HTC PH39100 using xda premium
Also, as soon as your battery reaches a 100% the android os is supposed to wipe the battery stats...so if you flash on a full charge there is no need, even if you don't flash on a full charge...just charge it to a 100%, maybe do a reboot and charge again to make sure...
I've never done a battery stat wipe in my life, (well actually I've done a few back on my infuse in the begining of my flashing days) anyways...Ive pretty much never done battery stat wipes and I've never had any issues with battery readings, not on my vivid and not on my infuse...and sometimes I flash when I'm down to 15%!!! I only do that cause I'm confident I could fix a brick from a bad flash...
Sent from my HTC PH39100 using Tapatalk 2
Wiping your battery stats is like throwing salt over your shoulder when you spill some. It's a superstition.
All the battery stats file does is keep track of which apps are using power and for how long (ie what's displayed on the Usage screen in the settings menu).
But you don't have to take my word for it... Google says so: http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
[HTC Vivid] My battery life suddenly decreased by 60%. I know this thread is old as hell but figured out the problem for myself... The orange LED indicating a charge (or even the software) will say charging when it's not. I realized my charger was only halfway in the power strip.. turns out the outlet or cord was bad still not sure but yea.
Related
I never had this problem until recently i've flashed to Cog 4.
It started after i did a full charge. It discharges to 80% and to 50% and to 20% and to 5% and then died off within an hour. My phone heated up even though when it is not active.
Now, after changing a new battery. I find that i can't charge it above 85%. I re-flashed with Phoenix and Serendipity. The maximum charge still stays at 85%.
I've cleared the battery stats and nothing changed. I need help here.
You might find this thread useful
http://forum.xda-developers.com/showthread.php?t=806211
It has some discussion about cog and battery life, but I suspect it might be outdated. Either way, it should have good info for you on how to get the battery fully charged
First of all, with custom roms, battery drains much quicker than normal, but i think you need to do a calibration. Charge your phone for like 12 hours to make sure its completely full, then drain it all the way until it dies. Then make sure its completely dead and wont turn on (sometimes the phone thinks the battery is dead, but its not. To solve turn on and off until there is no more responce. Take out battery, then try and power on. This will get rid of any static charge in the phone. Put battery back in and charge for another 12-15 hours to make sure its completely full. Go into recovery and wipe battery stats. Then let it die. That should do it.
Sent from my SAMSUNG-SGH-I897 using XDA App
Dupontrocks11 said:
First of all, with custom roms, battery drains much quicker than normal, but i think you need to do a calibration. Charge your phone for like 12 hours to make sure its completely full, then drain it all the way until it dies. Then make sure its completely dead and wont turn on (sometimes the phone thinks the battery is dead, but its not. To solve turn on and off until there is no more responce. Take out battery, then try and power on. This will get rid of any static charge in the phone. Put battery back in and charge for another 12-15 hours to make sure its completely full. Go into recovery and wipe battery stats. Then let it die. That should do it.
Sent from my SAMSUNG-SGH-I897 using XDA App
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yes and no.
custom roms wont necessarily use more power, in most cases less. and technically most power consumption is controlled by the kernel, and secondly the installed services in the ROM. new kernels useually come with a new rom but you dont have to keep it or you can upgrade it ect. But yes, when changing the kernel either by itself or with a rom you should reset battery stats.
I suggest drain it dead, plug it in until it is full, reboot into recovery and wipe batt stats (or use SGS tool script) WHILE PLUGGED IN, unplug.
or if you have an external batt charger, wipe batt stats in CWM then put in full battery.
Trusselo said:
yes and no.
custom roms wont necessarily use more power, in most cases less. and technically most power consumption is controlled by the kernel, and secondly the installed services in the ROM. new kernels useually come with a new rom but you dont have to keep it or you can upgrade it ect. But yes, when changing the kernel either by itself or with a rom you should reset battery stats.
I suggest drain it dead, plug it in until it is full, reboot into recovery and wipe batt stats (or use SGS tool script) WHILE PLUGGED IN, unplug.
or if you have an external batt charger, wipe batt stats in CWM then put in full battery.
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Click to collapse
When I said custom roms i meant that when you are on something other from stock. And for the most part, unless you are on a minimalistic rom, you do get worse battery. It is a known fact. Sure I have gotten 50 hours out of a rom/kernel combination, but it was never consistent. I had to flash back to stock and masterclear because i have random shutoffs and need to return it, and im seeing easily 30 hours out of stock with 3 hours usage of web email phone. Maybe its not the same for you, but stock has had the best consistent battery life for me.
Sent from my SAMSUNG-SGH-I897 using XDA App
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
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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.
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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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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
I just started noticing this after I installed Liberty48 (it might have been happening before)
After some use of my phone, it goes down to like 80% battery, but when i reboot, its back at 100%.
Then I tried doing this calibration technique even though its for the DX2 (figured it couldn't hurt)
http://www.droidxforums.com/forum/droid-x2-hacks/36498-battery-calibration-new-method.html
...afterwards, i experienced the same problem, battery drains a little bit and goes way up after a reboot.
Is there any fix for this? I don't have a problem SBFing (or FXZ whatever you call it). I have all my stuff backed up in multiple places. Is this a Droid Bionic problem, or a Liberty ROM problem?
One thing about calibration is that you want to run the battery all the way down at least once without powering down and then charge it to 100% without unplugging (but while powered on). This gives it a chance to establish new battery stats- otherwise it can revert to the assumed values and usually throw off your fresh calibration.
MillionManMosh said:
One thing about calibration is that you want to run the battery all the way down at least once without powering down and then charge it to 100% without unplugging (but while powered on). This gives it a chance to establish new battery stats- otherwise it can revert to the assumed values and usually throw off your fresh calibration.
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That's what Wipe battery stats on CWM is for. I did that.
Not exactly... you're just giving it a fresh start to rebuild the battery stats log "wrong", in essence. One full discharge and charge usually gives it enough recorded stats to properly establish the full point- otherwise the phone assumes that about 4100 mV is fully charged, when in fact this is a high-voltage battery and it should be at about 4300.
MillionManMosh said:
Not exactly... you're just giving it a fresh start to rebuild the battery stats log "wrong", in essence. One full discharge and charge usually gives it enough recorded stats to properly establish the full point- otherwise the phone assumes that about 4100 mV is fully charged, when in fact this is a high-voltage battery and it should be at about 4300.
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So I should just charge it, then let it die, then charge it again while its on?
You got it. As long as you don't plug it in or power it down during discharge, and leave it powered on and on the charger all the way to 100%, you should be good after one cycle.
MillionManMosh said:
You got it. As long as you don't plug it in or power it down during discharge, and leave it powered on and on the charger all the way to 100%, you should be good after one cycle.
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Could I use it as normal during the discharge?
Yep, that's fine. It shouldn't impact anything if you use it during the charge cycle as well, as long as you don't do anything (like hotspot) that would drain the battery faster than it was charging.
MillionManMosh said:
Yep, that's fine. It shouldn't impact anything if you use it during the charge cycle as well, as long as you don't do anything (like hotspot) that would drain the battery faster than it was charging.
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This. Last calibration I did, I ran it down via streaming a netflix movie on 4g. Burned it down in a little over 2 hours.
I'm using a HTC sensation with insert coin rom sense 3.5. Sane exact thing is happening to me except the battery is drained after a restart from maybe 40% to down 6% after a reset.
Sent from my HTC Sensation Z710e using XDA App
Similar issue here. New Droid Bionic. Battery went from 40% to 5% within a minute or two while sitting idle.
Hopefully 5% is enough of a discharge to calibrate the battery. I just finished charging it back up fully.
I just completely killed the battery wiped the status and charging now. In the morning I'll do this step and see how well the battery is after tomorrow.
Damn, it used to last me much longer than this, I don't know what happened.
Sent from my HTC Sensation Z710e using XDA App
Alright so I did the Droid x tip as well, it really doesn't have any effect on HTC phones since it just uses the led light to let you know that the battery is charging or full. But I also turned off always on mobile data and it uses less juice that way. I still get Gmail pushing email and twitter with mention updates.
So far, so good. I'm not rebooting mmy phone for a good two days. Afraid the battery meter will jump all around the place again.
Sent from my HTC Sensation Z710e using XDA App
I'm not sure if this is a common problem or not but lately I've noticed that when I unplug my phone after it says 100% charged, it immediately drops to a lower number. At first it would stay between 97 and 99, but i have seen it go as low as 45. I've tried several things like not installing the ROM until it is fully charged, calibrating the battery, and a few others but nothing fixes it. Is it possible it's just a kernel glitch or hardware issue?
Darky's 10.2.2 DarkCore 4.1 KG3 modem
Thanks in advance all!
Edit: Spelling error
Sent from my Samsung Captivate using XDA App
Its not a problem its a feature. The phone will stop charging when the battery gets to a certain temperature. So it will say 100% but it can go as low as 90%. I have no idea why your battery goes down to 45%...thats not normal. Try wiping battery stats from recovery or reinstall your rom.
I've had a similar situation. It helped to fully drain the battery until the phone shuts off.
Wait a while, then restart the phone without plugging in the charger. There should be enough charge to load the ROM.
Then plug in the charger and charge to a full charge.
If you are calibrating the battery, wipe the battery stats only after a full charge, and then be sure to run the battery down all the way before recharging.
2-3 cycles helps.
It's strange because the charge is shown accurately when the phone is off and plugged in. Like if it says 100% while the phone is on and I shut the phone off without removing the charger, it will show the actual amount the battery is charged on the battery meter. it's as if the kernel is having a problem reading the current battery state.
Thank you both for the advice though. I was very careful to install the rom with a full charge this time..or the base anyway..
Sent from my Samsung Captivate using XDA App
It doesn't matter what the battery is at when you flash, the "flash at 100" rule is just a precaution to make sure your battery doesn't die mid flash. I flash as low as 20%
That is a well known bug with gingerbread...yes the feature stops charging at 100 and us let drain to 95 and then starts charging again, the bug is that it Bebe starts charging again at 95 it continues to drain, so even though it says charged as Dijon as you unplug it drops to the actual percentage.
it's really random, and not everyone sees it, and those who do can't replicate it consistently, thus no solid fix has been found.
Some have said turning wifi off while charging helps, some say turning it on...
Well that's a relief. You just saved me the tedious task of fully
Charging my phone before flashing back to froyo. Darky's 9.5 seemed a lot easier for daily operations than the reoriented gingerbread roms. I had to remap my softkeys for starters, and was having a lot of force close issues with apps I used a lot, the battery problem was just the most recent headache.
Thanks for all the help. Hopefully I'll have time to start learning development instead of wasting my time fixing my phone.
Sent from my Samsung Captivate using XDA App
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.