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I'm having this problem with my i777.
Sometimes when I reboot the phone the battery charge drops enormously, like 30% or so. For example, I will be doing things with the phone, the charge will be at something like 60% then reboot and right after reboot it says charge is 30% which doesn't make much sense.
this happens with the stock battery but the effects seems to be more pronouced with some batteries I bought on ebay.
Anyone has any idea what's going on?
what rom are you running on?
bartolo5 said:
I'm having this problem with my i777.
Sometimes when I reboot the phone the battery charge drops enormously, like 30% or so. For example, I will be doing things with the phone, the charge will be at something like 60% then reboot and right after reboot it says charge is 30% which doesn't make much sense.
this happens with the stock battery but the effects seems to be more pronouced with some batteries I bought on ebay.
Anyone has any idea what's going on?
Click to expand...
Click to collapse
Normal behavior of our fuel gauge hardware - high load (boot process) immediately after a reset confuses it and makes it report low. Effect is much more pronounced at lower states of charge.
pham818 said:
what rom are you running on?
Click to expand...
Click to collapse
Rooted stock 2.3.4
build number: GINGERBREAD.UCKH7
Entropy512 said:
Normal behavior of our fuel gauge hardware - high load (boot process) immediately after a reset confuses it and makes it report low. Effect is much more pronounced at lower states of charge.
Click to expand...
Click to collapse
That's exactly right. Tends to happen more on lower states of charge.
Does this mean that the charge indicator will go up after the reboot? Or maybe it will take longer to drop and the effective battery life will be the same.
Yes when this happens to me my bettery either dies extremely slow or my percent just goes up..
Sent from my SAMSUNG-SGH-I777 using XDA App
Smacdallas said:
Yes when this happens to me my bettery either dies extremely slow or my percent just goes up..
Sent from my SAMSUNG-SGH-I777 using XDA App
Click to expand...
Click to collapse
I see this too. I will be at ~40%, reboot and see 10%. Come back after a while to 12%, and it stays on 12% with like an hours worth of heavy use before going lower. If I look at the battery usage, it trends down, then drops, but stays level, then about when the trend would have been it starts dropping again.
I thought I just needed to calibrate the battery, as I just flashed a new ROM. But, it keeps doing this after a week, and several charge cycles.
Guess I'm relieved to see this weird behavior is not indicative of a problem.
Sent from my Galaxy S II (i777)
bartolo5 said:
That's exactly right. Tends to happen more on lower states of charge.
Does this mean that the charge indicator will go up after the reboot? Or maybe it will take longer to drop and the effective battery life will be the same.
Click to expand...
Click to collapse
Correct - because the gauge thinks the battery is lower than it actually is when this happens.
Attached a screenshot of the battery use with the big drop in effect.
I particularly think this is a bug and Samsung should fix this behavior.
It can't be changed without hardware alterations.
As with anything in engineering, there are tradeoffs. The positive aspect of this fuel gauge design is that it does not require ANY calibration. No wiping battery stats, no "always flash firmware at 100%" - none of that.
The negative is that in a few corner cases, it gets thrown off temporarily. This is basically the only known one.
Ive noticed this as well with both Stock and ICScreweD. I just try to reboot as least as possible.
greystealth said:
Ive noticed this as well with both Stock and ICScreweD. I just try to reboot as least as possible.
Click to expand...
Click to collapse
If you reboot at higher states of charge, OR reboot when on external power, you should not see this issue.
I just had this same problem lol. I was at 42% and when I rebooted my phone it dropped to 23%....This was a few hours after the OTA update to 2.3.6.
I had the same problem also.
-Battery would not charge to 100% ( it would charge between 97% -98%)
-Battery would drop 20% or 30% percent (when reboot).
I tried to recharge many times and cycles the battey but nothing would work.
I tried changing kernal, modem and roms . Nothing would work.
I actually thought i messed my phone up.
So i tried something that work for me.
1) i would let the battery drain till it was completely dead!
2) I would take battery out for 5 minutes.
3) put battery in and charge with phone OFF till it reaches 100%.
4) unplug charger from phone and take battery out and wait 5 minutes.
5) put battery back in and plug charger up and wait till phone marks 100% again ( This time the wait was longer to get to 100%).
6) i repeated step 5 untill finally the phone would mark 100% faster
7) unplug phone and then wait to see the battery status ( if your phone mark 99%) plug charger to phone and let it charge till it reaches 100% again. once it reach 100% reboot and repeat step 7 untill you reboot and it would show 100%.
not sure if this might work for anyone else but it did work for me. battery would charge to 100% and i don't have my phone drop 20-30 percent after reboot.
If it drops 20-30% on a reboot when the battery is near full, you may have a defective battery.
I've only seen major drops on reboot when the battery is low to begin with, never when at higher states of charge.
Doing a full discharge on Li-ion batteries puts a huge stress on it and greatly decreases the life of the battery. To get the longest life out of a battery, you want to generally stay in the medium range of charge (Don't over charge it, and don't discharge it too much). Cars like the Chevy Volt employ these techniques to encourage a longer battery life, however with phones, you get users that think discharging the battery all the way solves problems. If you want to see the true battery life that the fuel gauge averages from, press *#0228# in your dialer and check the battery voltage. Full is around 4.1v and discharged I believe is around 3.5v or so. (maybe 3.3? not sure)
3) put battery in and charge with phone OFF till it reaches 100%. <-- is probably what fixed it, and why I switch batteries instead of charging on my phone because the charger is able to control the current and voltage better than with a slight load on it (with phone on)
I'm sure that that user cut off at least 5% of his overall battery life with overcharging it like that though...
Same issues here pending the ROM I'm using.
4.2 volts is the upper limit for li-ion - and actually, it hits that at around 95% charge.
The method for charging Li-Ion:
Charge with a current limit initially - on our devices this is 650 mA.
Once you hit 4.2 volts, do NOT go above this - maintain voltage at 4.2 volts or lower regardless of current
Once current drops to around C/10 (on our devices, this is about 160 mA), shut off charging completely.
The phone's charge controller does this all automatically for you.
There's usually a timer/averaging filters in the final stages of charge termination - which is why "bump charging" can push a little extra into the battery - but this will lead to degradation in battery total capacity.
As somewhat of an extra trivia on Li-ion batteries, Motorola has apparently managed to get batteries that have nominal voltage at 3.8v and max charged voltage is around 4.3v as opposed to 4.2v.
Hunt3r.j2 said:
As somewhat of an extra trivia on Li-ion batteries, Motorola has apparently managed to get batteries that have nominal voltage at 3.8v and max charged voltage is around 4.3v as opposed to 4.2v.
Click to expand...
Click to collapse
is it Li-ion tech though?
Sent from my SGH-I777 using Tapatalk
hi guys , i got some problem with the information displayed for my razr maxx. the thing is the battery usage curve won't change for the first 10% of power drain, and the awake bar and screen on bar are full. but when the battery drops to 80% and below, the curve starts to count from the 80% position, what is going on? how can i fix it ?
here is the screenshot
How many times have you already charged that battery from 0% to 100% and drained it back again to 0%?
Seems like a simple calibration issue that should have no effect in real world battery performance.
Had that too. If you want to know more about this, look up "batterystats.bin".
So, if you haven't done what I said in the first line, do it and report back.
i have tried delete the .bin file bwfore, nothing changed. i think i will try to charge it from 0to 100again see if there will be any change. btw will the battery calibration apps solve this?
http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
Read that. You don't have to do anything, just let your razr get some charge cycles and the readouts will be right. Remember: There is no need to tinker with this, as this has no effect except for cosmetic terms.
thanks for the information. one more thing, the battery indicator always shows that the screen on and awake time are the same, even after i turn off the screen and play music for an hour. is this normal? or the system keeps recognizing the status of the screen as on? how should i deal with this?
I would just wait a few days (read: charge cycles) and look again. Indeed strange, but if your battery doesn't get drained this also seems just to be another cosmetic issue.
actually it seems it has been more energy draining than before. it wouldn't drop 1% when i turned on flight mode at night and checked it in the morning. but now even i turn on flight mode it drops about 5% next morning.
roroy23 said:
actually it seems it has been more energy draining than before. it wouldn't drop 1% when i turned on flight mode at night and checked it in the morning. but now even i turn on flight mode it drops about 5% next morning.
Click to expand...
Click to collapse
Don't count on the battery percentage today. Look again tomorrow/after some charge cycles.
The battery readouts need to be calibrated to display the correct battery level.
I had the same "issues" (in fact, those don't seem to be real issues) and they went away. I assume your razr will behave the same as mine
Is the phone still new? I know mine was a little wonky until the charging and the meter apparently calibrated themselves to Maxx's battery Ever since, it's been very accurate.
yes it is still new. i got it about half a month ago. just got it charged to 100% from 0%. gonna see what will happen。
I have seen lots of threads about people complaining about very poor battery life after flashing roms. Sometimes battery charges to 100% quickly and discharges very quickly.
So, these are the solutions. These solutions are IN ORDER. If the first one has no effect, then try the next one. If the second one doesn't work, then try the third one.
Now-
1) Try reflashing your ROM.
2) If reflashing your current ROM doesn't work, that probably means the ROM itself has poor battery life and you should change it. Stock ROM's have the best battery life.
3) If you are on stock ROM and still having problems, switch off your phone, take off the back cover and remove the battery. If the battery is swollen or the shaped weirdly, this means your battery is dead and almost useless. You need to buy a new one.
I recommend buying only stock batteries manufactured by Samsung because other batteries can be fake, incompatible, or just used batteries sold to you. Don't buy anything else unless you're absolutely sure of what you're doing.
Hopefully I helped.
Re: Solutions to Battery Problems[Newbie Friendly]
General tips for saving your battery-
1) Switch off mobile data whenever you're not using the internet.
2) Change your wifi sleep policy. This can be done by going to wifi settings, pressing menu button and then select advanced.
You can change your sleep policy so that your wifi sleeps when the screen is off.
3) Decrease your brightness! Your screen is responsible for most of the battery drain. Increase your brightness only when you are in bright sunlight or when you're watching videos etc.
4) Switch off GPS. Keeping it on all the time also drains a lot of battery.
5) There is an app called 'Greenify' which hibernates the apps running in the background. This app has increased my battery life. Here a link https://play.google.com/store/apps/...e=google&utm_medium=organic&utm_term=greenify
6) Don't charge your phone when it's at 70%. Wait till it is between 20-30% and then charge it continuously till it reaches 100%.
7) Let your battery completely discharge once every month.
8) Don't use task killers. They use more battery life than they save.
9) NEVER charge your phone overnight. Your phone takes only about 4 hours to charge. Overcharging reduces your battery life
10) If you use a Bluetooth headset, switch off Bluetooth whenever not in use.
11) Using setCPU profiles. This is one of the most effective ways of saving battery. You all know about overclocking, but do you know about underclocking or undervolting? Using profiles, You decrease the clock speed of your CPU when certain conditions are met. These profiles can be on the basis of time, screen off/on, battery etc. So when my screen is off, it automatically reduces the clockspeed which saves battery
chalak said:
General tips for saving your battery-
1) Switch off mobile data whenever you're not using the internet.
2) Change your wifi sleep policy. This can be done by going to wifi settings, pressing menu button and then select advanced.
You can change your sleep policy so that your wifi sleeps when the screen is off.
3) Decrease your brightness! Your screen is responsible for most of the battery drain. Increase your brightness only when you are in bright sunlight or when you're watching videos etc.
4) Switch off GPS. Keeping it on all the time also drains a lot of battery.
5) There is an app called 'Greenify' which hibernates the apps running in the background. This app has increased my battery life. Here a link https://play.google.com/store/apps/...e=google&utm_medium=organic&utm_term=greenify
6) Don't charge your phone when it's at 40%. Wait till is below 10% and then charge it continuously till it reaches 100%.
7) Let your battery completely discharge once every month.
8) Don't use task killers. They use more battery life than they save.
9) NEVER charge your phone overnight. Your phone takes only about 4 hours to charge. Overcharging reduces your battery life
10) If you use a Bluetooth headset, switch off Bluetooth whenever not in use.
Using these tips, I have gotten almost 2 days of battery life on stock Roms and a whole day of battery life on custom roms like CM10.1 and CM7
If you have your own battery saving tips, please share and help expand this list.
Click to expand...
Click to collapse
I'm interested in the greenify app, the only problem is that it does not support stock gingerbread which can give the most juice. Do you have any other recommendations of similar apps?
stevenkyk said:
I'm interested in the greenify app, the only problem is that it does not support stock gingerbread which can give the most juice. Do you have any other recommendations of similar apps?
Click to expand...
Click to collapse
Greenify is a unique app and I am yet to come across a similar app.
You can try this one but it is paid - https://play.google.com/store/apps/details?id=com.elsdoerfer.android.autostarts
Sent from my pet - Megatron™
6) Don't charge your phone when it's at 40%. Wait till is below 10% and then charge it continuously till it reaches 100%.
9) NEVER charge your phone overnight. Your phone takes only about 4 hours to charge. Overcharging reduces your battery life
Are you sure about these? Because I've read that phones only take how much ever charge that they need, so charging overnight isn't a problem. And i've also heard that letting the battery charge fall below 40% actually reduces the life over time.
Ajayr64 said:
6) Don't charge your phone when it's at 40%. Wait till is below 10% and then charge it continuously till it reaches 100%.
9) NEVER charge your phone overnight. Your phone takes only about 4 hours to charge. Overcharging reduces your battery life
Are you sure about these? Because I've read that phones only take how much ever charge that they need, so charging overnight isn't a problem. And i've also heard that letting the battery charge fall below 40% actually reduces the life over time.
Click to expand...
Click to collapse
Yes, I am sure and it is something I have verified.
Overcharging kills the battery.
I saw a video once of an evo 3d. The battery almost completely died after it was charged for 3 days
And you should always charge only when your battery is low.
This will ensure longer battery life
chalak said:
Overcharging kills the battery.
Click to expand...
Click to collapse
Normally, when the battery is fully charged, the chip that controls the charging process reduce the current exponentially to 0: this avoid the overcharging.
I think all smartphones have the charging chip control integrated (an USB cable is simply a power source, not a battery charger), so I hope we can leave the phones on charge all the night without any problem. I do that always and never had problems.
Clearing battery stats has no effect whatsoever on battery life ...
Prawesome said:
Clearing battery stats has no effect whatsoever on battery life ...
Click to expand...
Click to collapse
Well, if you see again, I never mentioned that clearing battery stats saves battery. It is for those people whose phone charges very quickly with big increments, which typically happens after changing ROM's.
Sent from my pet - Megatron™
smanq said:
Normally, when the battery is fully charged, the chip that controls the charging process reduce the current exponentially to 0: this avoid the overcharging.
I think all smartphones have the charging chip control integrated (an USB cable is simply a power source, not a battery charger), so I hope we can leave the phones on charge all the night without any problem. I do that always and never had problems.
Click to expand...
Click to collapse
It seems both of us have read conflicting and contradicting things.
Sent from my pet - Megatron™
chalak said:
Well, if you see again, I never mentioned that clearing battery stats saves battery. It is for those people whose phone charges very quickly with big increments, which typically happens after changing ROM's.
Sent from my pet - Megatron™
Click to expand...
Click to collapse
Quoting Dianne Hacborn(Android Framework Engineer):
"Today's myth debunking:
"The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/directory."
No, it does not.
This file is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings.
That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your more device more fantastic and wonderful... well, unless you have some deep hatred for seeing anything shown in the battery usage UI. And anyway, it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point), so this would be a much easier way to make it go away."
Its just a myth mate..
And also, it's a myth that you should let ur phone charge reach 10% or get fully discharged before charging. This actually leads to decrease in the battery life over time.
Prawesome said:
Quoting Dianne Hacborn(Android Framework Engineer):
"Today's myth debunking:
"The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/directory."
No, it does not.
This file is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings.
That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your more device more fantastic and wonderful... well, unless you have some deep hatred for seeing anything shown in the battery usage UI. And anyway, it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point), so this would be a much easier way to make it go away."
Its just a myth mate..
Click to expand...
Click to collapse
I am aware of what you are saying and I fully agree.
But I have never mentioned that clearing battery stats increases battery life!
Tips to increase battery life are in the 2nd post. I simply said that if you clear your battery stats, UI will show you battery which is more accurate to the actual battery level.
Why are you arguing over something I never said?
Sent from my pet - Megatron™
Ajayr64 said:
And also, it's a myth that you should let ur phone charge reach 10% or get fully discharged before charging. This actually leads to decrease in the battery life over time.
Click to expand...
Click to collapse
Think of your battery as a person working out and charging is like taking rest. If the person's ability is to do 100 reps yet he takes rest after only 60 reps and keeps doing that continuously, he won't be able to do 100 reps after a few weeks!
Look at the logic mate.
Sent from my pet - Megatron™
chalak said:
I am aware of what you are saying and I fully agree.
But I have never mentioned that clearing battery stats increases battery life!
Tips to increase battery life are in the 2nd post. I simply said that if you clear your battery stats, UI will show you battery which is more accurate to the actual battery level.
Why are you arguing over something I never said?
Sent from my pet - Megatron™
Click to expand...
Click to collapse
I am not arguing :/
I am just trying to help make your guide more Informative. Read what I have put in bold letters mate. It doesn't affect the battery level shown to you
Prawesome said:
I am not arguing :/
I am just trying to help make your guide more Informative. Read what I have put in bold letters mate. It doesn't affect the battery level shown to you
Click to expand...
Click to collapse
Sorry if I sounded rude.
And thank you for your advice.
Sent from my pet - Megatron™
Updated
Sent from my pet - Megatron™
(I was Chalak)
Thanks for tips
You misunderstood me :'D
Clearing battery stats does not:
Affect battery life
Affect the battery level displayed to you
The only thing it does is, it wipes the history of battery consumption by each app. I am talking about the battery consumption by each app shown to you in Settings>About phone. If you clear the battery stats.bin file, the only thing that geta erased is this
Prawesome said:
You misunderstood me :'D
Clearing battery stats does not:
Affect battery life
Affect the battery level displayed to you
The only thing it does is, it wipes the history of battery consumption by each app. I am talking about the battery consumption by each app shown to you in Settings>About phone. If you clear the battery stats.bin file, the only thing that geta erased is this
Click to expand...
Click to collapse
This! Anything about wiping battery stats is not a myth anymore, so please stop misleading people,
Also "6) Don't charge your phone when it's at 40%. Wait till is below 10% and then charge it continuously till it reaches 100%."
Not true! Charging your battery around 50% is the most efficient way to keep lithium battery alive longer. A discharge once a month is also recommended.
I accidentally found a way to over come the unsual battery drain. This method may not work out with completely worn out - old batteries. A month after I bought my s3, my battery started to drain excessively. I had installed no new apps..
Phone Usage was almost the same. Before the battery drain I got almost 26~30 hours of battery at normal use... after the battery drain I got less than 12 hours for the same usage.
So here is the method.
Put the phone on charge. After puttting it on charge, switch off the phone... u can restart it after twenty seconds... ideally wait till the phone cools down, if it feels hot... don't use the phone till it reaches 100% charge. This method works for any initial charge. I.e. it works when the battery is at 98% or at 1%. But if u try this method when u have 1% and u keep using the phone while charging, this method may not work... so ideally don't use the phone while charging.
So now I do this everyday and my phone lasts for 26~30 hours on normal use.
I used gsam battery monitor pro to monitor my phone's temperature and battery usage.
It also gives the average number of hours the battery will last.
For those who dont know : Ideally charge the battery when it is leas than 10%. This will increase the overall battery life.
P.s. it works for me. Don't complain if it doesn't work for u!!
Cheers,
Kraadhagaa aka sivakannan
http://batteryuniversity.com/learn/article/battery_calibration
You basically calibrated your battery. Typically only needs done about once a month at most to keep your battery gauge accurate. Any more than that hurts your battery.
t1n0m3n said:
You basically calibrated your battery. Typically only needs done about once a month at most to keep your battery gauge accurate. Any more than that hurts your battery.
Click to expand...
Click to collapse
Calibration is draining the battery till 0%, phone switches off and charging it till 100% when the phone is switched off.
This did not do the job. Battery drain was still bad.
After trying out my method, i charged the phone for two or three cycles without this method. Then the battery drain got horrible till the method was repeated.
I have been testing this method for a month. It hasn't caused Any harm. My battery life is good.
Its in effect the well posted bump charge method .
jje
stop playing games!! :silly:
sivajikannan said:
Calibration is draining the battery till 0%,
No its not calibration is using the phone .
Basically many just talk a load on nonsense when it comes to battery's .
jje
Click to expand...
Click to collapse
I don't know a lot about batteries so I don't know how much of this is true.
I read that the phones chip, if it regularly see's the phone's battery going no lower than say, 15% over time (i.e, user always charges it once it hits 15%) that it will start to use this 15% mark as the "empty" level and that the best thing to do is to "remind it" every now and again, that there are battery levels below this 15% by letting it drain to 0%
Anyone got any comments on that?
Dianne Hackborn13 Jan 2012+
1
2
1
Once you get above 90%, I would stop worrying about it. I think most if not all devices need to go through charge/discharge cycles while fully charged to keep the battery life good, so when it is "charged" it will actually be ramping up and down to do that. How this is shown to the user varies across manufacturers, and there is really no clearly right solution -- if you show them the actual changes in level they start complaining and getting concerned about their battery not being at 100%, so it is good to just show it at 100% at this point but then you are giving a little white lie about the actual level.
NOTE last line 100% is not really true .
As to the 15% all i read is that continual dropping below 15% / 10% is bad for the battery's overall life .
jje
JJEgan said:
As to the 15% all i read is that continual dropping below 15% / 10% is bad for the battery's overall life .
Click to expand...
Click to collapse
The other thing with Li-On batteries is that (as you say) using the last 10-15% of charge is damaging to overall battery life. If the battery reaches "True 0", it would be irreparable. That said, this last 10-15% of "Danger zone" (as I will now call it) is inhibited by an EPROM setting so a user cannot actually get below that.
Essentially, what I am saying is that the 10-15% "danger zone" is not included in the 0-100% that we perceive to be the "battery life" as the user.
So in the 1st attached image, the Red area represents the "danger Zone" or EEPROM protected charge. The Green area represents the 0-100% that we use as a user.
But in this case, I am asking if the EPROM sees the 15% remaining charge of the green area (forgetting the danger zone exists), if regularly not dropping below that, it becomes the new 0%, losing the last 15% of the green area as per the second image?
The phone only sees a reported voltage value, which it compares to a table giving an approximate % remaining - based on a fixed battery capacity.
The 15% danger/red zone you refer to is below the minimum voltage the phone will allow the battery to ever reach, as below this value the battery itself will act to disconnect - giving unexpected shut down and data loss/partition corruption. You would also be unable to recover a battery in this condition with a normal charger.
Best advise is still to recharge before the battery reaches 10 to 15% of the phone's indicated remaining value - you can safely go down to 0% indicated but will lose a little battery capacity each time you do this, as the electrodes inside the cell are being worn away. It's no big deal, hence why the phone permits it to happen, you'll just need to replace the battery earlier.
Similarly charging to 100% and holding the cell there is just as bad, remove from the charger and start using it right away.
boomboomer said:
The phone only sees a reported voltage value, which it compares to a table giving an approximate % remaining - based on a fixed battery capacity.
The 15% danger/red zone you refer to is below the minimum voltage the phone will allow the battery to ever reach, as below this value the battery itself will act to disconnect - giving unexpected shut down and data loss/partition corruption. You would also be unable to recover a battery in this condition with a normal charger
Click to expand...
Click to collapse
This I know but it's not related to my question.
boomboomer said:
Best advise is still to recharge before the battery reaches 10 to 15% of the phone's indicated remaining value - you can safely go down to 0% indicated but will lose a little battery capacity each time you do this, as the electrodes inside the cell are being worn away. It's no big deal, hence why the phone permits it to happen, you'll just need to replace the battery earlier.
Click to expand...
Click to collapse
I'm not sure I agree with this but again, it's not related to my question.
*shrug* Sorry, I read your post about 10 times last night and figured you were talking about calibration. I then posted accordingly. Tonight, after I read your reply, I tried reading your post again a few more times. Finally, I came to the conclusion that your post makes no sense, so I give up trying to decipher what your post was trying to say. I surrender.
The best answer to the battery drain issue is a application called "GREENIFY". It closes all the background applications.. Try it n thank me if u feel it worked.. It increased my battery life more than twice..
Sent from my GT-I9300 using Xparent Cyan Tapatalk 2
Lol... e=mc^2 doesn't make sense to a lot of people either
t1n0m3n said:
*shrug* Sorry, I read your post about 10 times last night and figured you were talking about calibration. I then posted accordingly. Tonight, after I read your reply, I tried reading your post again a few more times. Finally, I came to the conclusion that your post makes no sense, so I give up trying to decipher what your post was trying to say. I surrender.
Click to expand...
Click to collapse
I recently had my Thunderbolt replaced with a refurb from Verizon. When I got the new phone I removed my old battery, which was working fine, from my old phone and placed it in my new phone. Now in the new phone I fully charge the battery and I get about 45 minutes to an hour of battery life before my phone is down to 2% battery life. However, the phone then has the same battery life as it did in my old phone, it just still says there is only 2% battery life left.
I'd tried completely killing the battery then recharging fully for about a week. The battery stats never reset.
I then rooted my phone, charged it completely and purged the battery stats. The issue persists.
Sounds like an aftermarket, non-oem battery...is it?
If it isn't a stock oem battery and especially if running ICS, it will not read correctly.
It may charge and discharge properly, but may never read accurately.
If it is an oem battery, then you got me.
Well i did this thing on my cousin's Htc Amaze a long time ago
i used die hard battrey calibirator to calibrate the battery. the phone was showing 2 percent supposed to be 170 percent so i pressed calibrate button and it worked for about a week until the battery had the same error
try doing that it might do something... or nothing at all but worth a try
santod040 said:
Sounds like an aftermarket, non-oem battery...is it?
If it isn't a stock oem battery and especially if running ICS, it will not read correctly.
It may charge and discharge properly, but may never read accurately.
If it is an oem battery, then you got me.
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Click to collapse
Nope, it's the original battery I received with the phone. I'd understand if it were just time for a replacement but the fact that it stays awake at 2% for so long leads me to believe it's not actually an issue with the battery.
If you calibrate the battery incorrectly it can make the phone display the wrong amount. I did this before using die hard battery calibrator. To manually recalibrate. Discharge the phone totally and then charge it until the green light comes on. Boot into recovery and then wipe battery stats in recovery. That might help you out but I somehow doubt itm
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I tried using a battery calibration app and haven't seen any change.
I also looked for my batterystats.bin file in /data/system to manually delete using a file explorer but I didn't see it there. Does anyone know why that may be or if that could contribute to the issue?
I also looked for my batterystats.bin file in /data/system to manually delete using a file explorer but I didn't see it there. Does anyone know why that may be or if that could contribute to the issue?
Click to expand...
Click to collapse
Disregard that, turns out I didn't have ES File Explorer with root permission.
Li-on batteries don't actually perform the way many people think they do. They do not discharge in a linear fashion. That's what makes metering them on the phone so complicated. As the battery ages it's non-linear output changes as well, and that's what the statistics are designed to correct for when displaying a charge level.
Here's how you know your battery is a dud.
Pay attention to the voltage. As a Li-on battery discharges it discharges in a very flat way. The battery is fully charged when the voltage curve of the battery begins to ramp up sharply. The battery is technically dead when the voltage begins to drop off sharply. What ultimately renders a Li-on battery garbage is when that fat flat spot in it's voltage/charge curve drops below a threshold that will power the device. If the battery is displaying adequate voltage for a reasonable length of time and the phone still reads inaccurate, then it's the fault of the phone.