Database Develop

Erase battery stats to get better battery life? flash without full battery?

Is it true that the porcentage of battery u have when u flash ur phone is the one that will be used as the new 100% ? also whats the procedure i should use to erase the battery stats? my phone dies in like 4 hours , let it discharge, charge completely and then?

I don't think so, cause i always flash my MS anytime i wish even when the indicator show <20%, or when charging on UBS

I also never bothered to charge fully before flashing. Though I think resetting battery stats does help indeed.

i also read something similar to this, someone told me to charge to full, then let the phone discharge UNTIL IT TURNS OFF BY ITSELF (=battery completely dead), then charge to full again and then delete the file batterystats.bin in /data/system folder (root required).
i suppose this is what you are talking about?
i will try this in a few hours (currently discharging the last % of my battery).

andreju said:
I also never bothered to charge fully before flashing. Though I think resetting battery stats does help indeed.
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Im confused im supposed era the stats before right after chanrging full charging the phone or i sould let it discharge m, then erase the stast and then full charge the phone?

What's your ROM?
On froyomod do you have option to calibrate battery and wipe battery status

Well, I've flashed it to FroyoRom with approx. 40% charge, played around a little, the next day when I was normally using it and my battery went down to 30% I deleted the battery stats, the system rebooted and voilla, I was at 50%
I don't know about this full charge - discharge - full charge - delete stats version. I guess I'll try it on an occasion and see what happens. At this moment I'm at 90% after being disconnected from charger for 5 hrs, though I wasn't using the phone much during this time.

...and currently finishing the same charge - after 1 day and 17 hrs currently at 20%. My Milestone never made it through the day without having to charge it through the night. Love it

The FroyoMod is really the best at the moment...

[Q] Battery charges to 85% maximum

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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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

do i need to wipe battery stat?

I have replaced the stock rom with gingerdx v19. the phone is functioning well. One thing I notice is that if I charge it offline. The most it would get up to is 94% no matter how long I charge it for. If i charge it while on it will shoot past 94% and eventually get to 100% full cap.
I am just wondering if this means I need to wipe battery stat. Other than that the phone could last for 3-4 days on minimal usage.

vientito said:
I have replaced the stock rom with gingerdx v19. the phone is functioning well. One thing I notice is that if I charge it offline. The most it would get up to is 94% no matter how long I charge it for. If i charge it while on it will shoot past 94% and eventually get to 100% full cap.
I am just wondering if this means I need to wipe battery stat. Other than that the phone could last for 3-4 days on minimal usage.
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If you satisfied with your battery then you dont need to do it but if you are not you should do it like this: Charge your phone 100% reboot your wipe battery and reboot it, while its loading unplug your charger and when your phone is loaded charge it again to 100%

[Q] just wanna ask x8 battery life

hello
i just wanna ask something about my battery life on my x8...here's how it goes first i fully charge my battery up to 100% until it says on status battery full...then i unplugged it..after it i texted for a few minutes...and i check the status of my battery and it says: 28 mins 23s on battery..my battery is on 96%..is this normal.? or somethings draining my battery,?
i use minicm7 2.2

this is normal since battery is heating itself while charging, and when it cools down it shows less percentage of itself... to maximaze your current battery life, calibrate the battery:
1. charge it to 100% no more no less
2. leave the charger PLUGGED IN, and reboot to CWM
3. there you should find somewhere under options or advanced "wipe battery stats", and you press that
4. reboot your device and when it starts up it will show about 91%, charge it to 100% and you have your battery calibrated
NOTE: the charger is always plugged in

ok thanks i'll try it... one question should i drain the battery before calibrating it.?..as in zero percent??

menos_grande said:
ok thanks i'll try it... one question should i drain the battery before calibrating it.?..as in zero percent??
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Yes , that is recommended.
Also , one advice from me.
Even after calibration , whenever your phone says 100% charged , reboot it while the charger is plugged. You will get the exact battery charge after reboot.
Do it every time your recharge your phone.
Then stop rebooting when you get a 99% or 100% after a fresh reboot. Trust me , it helps.

ok thanks for the advice i'll try that too...

it is normal dude ....mine is giving 1day on heavy use

use zepplinrox's supercharge script...it really made a CONSIDERABLE change to m battery usage time

I have one question: "Why my battery is giving 6-8h. My battery 2 days ago giving 24 and more hour." Sorry for my English, but i am from Poland

what happened 2 days ago? did you install new ROM?

The OP might not have needed to install a new ROM, just an APP or maybe just a combination of APPs running. My phone sometimes canes the battery in a couple of hours from 50% to nothing for no apparent reason. On both stock and custom (actually better battery life on custom) it lasts about a day but sometimes about 6 hours! Not sure what is going on as this happened on both the stock 1.6, 2.1 and the custom 2.3.4!

Question Battery software or hardware issues?

I havent installed a custom ROM in a while so I was feeling bored and downloaded a new ROM, copied the files overs and booted to TWRP recovery and wiped everything. I cant remember what all but i think whatever was available to wipe, I wiped
I then installed ADB to my new PC and my phone was not showing up in fastboot or adb (possible driver issues) and eventually the battery died while in the recovery.
I plugged the phone into the charger and it kept showing the battery empty icon and was not charging at all. I left it on charge for hours but nothing happened.
I eventually got a new battery and while the battery still had life in it I charged it full and then went on to install a ROM from my old PC that already had adb and I used to use it previously for installing custom ROMS.
No the phone works but dies randomly at different battery percentages. Sometimes at 60% othertimes at 40% etc..
Battery drain doesnt seem too bad. When I disable wifi, bluetooth and NFC the battery only drains 50% after 24 hours but if I leave wifi on it drains faster.
When I try to play games at 100% battery after 30 minutes the battery would be at 75% and then just shutdown saying 0%.
Then I plug it into the charger and while the phone is off it'll start charging from 0% and when it reaches 25%, if I turn it on it shows 70%
Could I have deleted / wiped files that I was not suppose to that could cause this kind of a problem?

ihsaan said:
I havent installed a custom ROM in a while so I was feeling bored and downloaded a new ROM, copied the files overs and booted to TWRP recovery and wiped everything. I cant remember what all but i think whatever was available to wipe, I wiped
I then installed ADB to my new PC and my phone was not showing up in fastboot or adb (possible driver issues) and eventually the battery died while in the recovery.
I plugged the phone into the charger and it kept showing the battery empty icon and was not charging at all. I left it on charge for hours but nothing happened.
I eventually got a new battery and while the battery still had life in it I charged it full and then went on to install a ROM from my old PC that already had adb and I used to use it previously for installing custom ROMS.
No the phone works but dies randomly at different battery percentages. Sometimes at 60% othertimes at 40% etc..
Battery drain doesnt seem too bad. When I disable wifi, bluetooth and NFC the battery only drains 50% after 24 hours but if I leave wifi on it drains faster.
When I try to play games at 100% battery after 30 minutes the battery would be at 75% and then just shutdown saying 0%.
Then I plug it into the charger and while the phone is off it'll start charging from 0% and when it reaches 25%, if I turn it on it shows 70%
Could I have deleted / wiped files that I was not suppose to that could cause this kind of a problem?
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Click to collapse
Try to make a clean ROM installation with prior the fw and formating data with yes.....
Follow installation instructions of the chosen ROM step by step and don't delete everything again except with format data yes

Did you say you installed a new battery? Was it from official service center? You can use some battery monitoring apps like Better Battery stats /GSAM etc and see what's really causing it. Otherwise fresh install, check for few days.

So you got a new battery as a replacement. If you just got this online then there's a high chance the battery is a scam and is not exactly 5020 mAh. I know this because I'm a victim of this too on my older phone, I literally have the same issue. I suggest to get a new replacement, making sure to get it from official Mi Store or service center. In the meantime, calibrate your battery by emptying to 0% (till the phone dies) then charge to 100% while off. Repeat a couple of times and the battery percentage should display correctly. There's also a suggestion of clearing batterybin stats or similar to Poco x3 Pro where you calibrate PMIC, no harm in trying because I tried it before too and it didn't seem to cause any issues.
Here's a link to the guide if you're interested:
Calibration of the PMIC (Vayu/Bhima/Surya) via fastboot.
⚠️HONESTLY READ THIS WARNING ONCE! - CALIBRATION OF THE IC, WOULD NEITHER RESULT IN A HARD BRICK/PREVENT BRICK. AS TO BE CLEAR WITH THIS *HOW TO THREAD*, IS ONLY MENT FOR PEOPLE HAVING PARTIALLY BUGGY PMIC, FACING AFOREMENTIONED ISSUES, HAVING...
forum.xda-developers.com

But the same issue happened on the original battery also

"I cant remember what all but i think whatever was available to wipe, I wiped"
So you wiped internal storage? That's probably causing issues.

Yep I think I did or at least some of it idk.. Can that be fixed?

Re-flash Stock ROM.
BTW: Always use Android USB drivers provided by phone's OEM, not those found in Android platform SDK. Then phone should get detected via USB.