Develop Bugs

Correct way to recalibrate/wipe battery stats

Does anyone have a link for the thread that discussed the correct way to wipe battery stats when upgrading to a new Rom? I remember it went something like drain dead, charge to full, drain dead again then charge to full and wipe stats. I can't remember the complete process. Thanks for the help.
Sent from my PC36100 using XDA App

I've seen a couple different threads on that here, one saying discharge fully then charge while powered off, and the other saying to do a full charge "conditioning cycle". I did the latter and it seems to have made a difference.
Here's what I did:
Charge the phone fully with it powered on
When fully charged, disconnect cable
After green LED goes off, power the phone off
When phone is fully powered off, reconnect cable, amber charging light should be on
When LED goes green, disconnect cable
Repeat previous two steps 10 times
After 10th cycle, boot into recovery and wipe battery stats.
I am using Amon Ra recovery which has the wipe battery stats option under the Wipe option. I never did this when I had Clockwork recovery installed, so I don't know if the option is in the same place.
Being an electrical engineer, I find this business of battery conditioning interesting, along with the Ni-Cd "memory" vs. Li-Ion "no memory" issue. If anyone has found a decent physics-based explanation as to why these things do or do not have any basis in fact, I'd appreciate a link. Yes, I'm too lazy to Google it at the moment.

Hmm, I may have to look into this again. I charged my phone all night (powered off) and unplugged it this morning. I did nothing with it this morning but turn it on and look at it, then put it in standby (quick press of power button). It lost 16% of charge in less than 2 hours!
I'm running BS1.2 with the Baked1 (low voltage/best battery) kernel.
Damn, just installed System Panel and found that my CPU is at 100% constantly!

I'm trying this now. The longest I've pushed my battery was 22 hours... and that was with 39 minutes of screen on time, lol. In standby almost the entire 22 hours....

Ok, I believe my issue was related to a camcorder problem, my CPU usage has dropped back to normal levels after fixing that separate problem. After my battery recharges fully I will see what happens with the charge.

the other methods to do "calibrate your battery" (which isnt really calibrating the battery but the battery stats of the phone so it can accuratly judge when it stops and starts charging)
1) charge the phone to full
2) unplug and use phone till it shuts off from no battery (do not plug in until it shuts off)
3) charge phone to full again with out unplugging till 100% (check under about phone > battery it shoudl say full charge there)
this should reset the battery stats.
the last method is one from HTC
1)Charge the phone for 8 hours uninterupted with power on
2) turn off the phone and charge for an additional hour
3) turn ont he phone unplug it and let it sit for 2 minutes then plug it in for an additional hour.
all 3 methods listed should help. I personally dont like the x10 method because it has the potential and basically over charges the battery to make sure it is acctually at a full charge. It is much faster then the other 2 methods though so to each there own.

Dont waste your time on...
plug/unplug 10 times. It really doesn't recal the battery.
the unplug/plug 10 times.
1. Phone on...charge until green light comes on. Immediately unplug and turn phone off.
2. Plug phone back in until green light comes on again. Immediately boot into Recovery and wipe battery stats.
3. Use the phone on battery until dies.
4. recharge phone to 100%
You are good to go!

If I tether during the day (5+ hours) a lot, is it bad on my battery? Isn't that like a constant charge or does once the LED turn green it stops trying to charge?
Thanks.

fldash said:
If I tether during the day (5+ hours) a lot, is it bad on my battery? Isn't that like a constant charge or does once the LED turn green it stops trying to charge?
Thanks.
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the evo doesnt do a trickle charge so when the light turns green it stops, this is why you will almost always drop 1-5% battery rather quickly.

Are you sure? My light has been green for a while, and my phone battery status says 'Full'.

fldash said:
Are you sure? My light has been green for a while, and my phone battery status says 'Full'.
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There's a lot of confusion over how the battery / charging circuit works and how it reports. My advice is to just charge until it's green and full, then unplug it. If you leave it plugged in all night, unplug it for 10 mins in the morning, then plug it back in to top off.

That doesn't really help me SilverZero, my question is only if leaving it tethered (which means connected to USB) is bad for my battery.

Well on mine i would check it every once in awhile and i would see that once it get downs to under 90% that it would charge again till it recognized that it was full again. So based on that i dont think you should have to worry about it. It seems to only draw the charge when needed. I also leave mine plugged in alot when im home so its good to go when i leave and havent noticed a loss of battery life at all.

You guys don't want the charger to trickle charge. Li-Ion does not accept overcharge, even 0.01C (15 mA on the stock Evo battery) will cause it to vent and probably combust.

So does "calibrating the battery" calibrate the phone or the actual battery?
I ask because I have 3 spare batteries, wondering if I have to do this for each of them??? They are all standard size, one of them OEM

[Q] Instant discharge.

So, I'm on my Evo today, playing a game (Air Strike). My battery is at 93% when I picked the phone up to play, and the phone is plugged in. Suddenly, with no warning what-so-ever, my phone shuts off. Of course a mini-freak out and many "wtf's" ensue. No warning, no signs, even the led went off. I pulled the battery, put it back, then plugged the phone in again. After that it gave me the blinking light indicating the battery was too low to turn on. After a few minutes charging she came back on and battery was at 5%.
How the hell does a battery go from 93% to 0% in less than 5 minutes, and give no warning at all?? Anybody else ever have this problem?

Wow I've have never heard or that happening before. Maybe a glitch in the battery stash? Did it take awhile to charge up to 100%? Can you reproduce the issue again?
Sent from my EVO (CM 6.1.1) using XDA App

I had this problem with my older phone once. The battery itself may have a problem or your phone is not getting charged properly.
Try These :
1) Try charging the phone overnite from the Wall charger (Not through USB of your computer)
2) If the above does not work, and you have access to another evo battery, then try using that.(try using a friends battery and charger for a day. ) (Ofcourse needless to say the charger and battery must be for Evoonly )
In my case, my phone started working fine again after getting my battery & charger replaced.

Probably shouldn't worry about it too much just yet. Could be something as simple as your battery meter was mis-calibrated. The meter itself is software so it can easily be wrong/off. If it continues you may have a bad battery.

Sounds to me like something is wrong. Did you just get the phone or have you had it?

Idk... The phone had been plugged in for most of the day (hadn't gone anywhere. Lazy day lol) And like I said, the led went completely out as well.
Haven't had the problem again, so we'll see I guess....

Mark_Hardware said:
Idk... The phone had been plugged in for most of the day (hadn't gone anywhere. Lazy day lol) And like I said, the led went completely out as well.
Haven't had the problem again, so we'll see I guess....
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I've seen some posts about the Evo battery shutting off the charge when its being used. Were you using your Evo while it was charging?
If the battery doesn't seem to be giving you percentages that are accurate, you might want to recalibrate your battery.
Common misconceptions sticky (Evo Q&A) said:
Battery recalibration (Thanks to Cyanogen for this and to fachadick for bringing it to my attention).
If you're experiencing higher than normal battery drain, try the following:
1. Charge the phone to full battery; let it keep charging until the battery says it is fully charged. Do not just wait until the light is green, it isn't always fully charged, causing a lot of inaccuracies. (You can check by going to: Settings -> About Phone -> Status -> Battery Level = Full.)
2. Boot to recovery and wipe battery stats.
(To have the most accurate of battery stats, reboot the phone immediately after wiping the battery stats and wait for your ROM to boot completely to the desktop. Once your entire boot is done and you have full access to the phone, go ahead and pull the charger and continue.)
3. Do not charge the phone until after draining the battery completely, resulting in it automatically shutting off. Take out the battery, and keep trying to turn on your phone until it will not turn back on at all.
4. Recharge the phone completely and then use as you normally would.
This is a method that has been proven to work, I am sure there are other ways. My battery lasts longer after doing this and the reading is much more accurate. It might be advisable to do this after every ROM install if you want the most battery life and most accurate battery reading by the phone's software.
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[Q] im still having problems with my extended battery

I don't understand why its not working correctly I did everything I was my phone isn't rooting is there anything else I can do to get it to work correctly without rooting it???

pjay203 said:
I don't understand why its not working correctly I did everything I was my phone isn't rooting is there anything else I can do to get it to work correctly without rooting it???
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I'm obviously missing something here and your post isn't very clear. Why would you need to root your device just to use an extended battery? That doesn't make any sense. All you should have to do is put the extended battery on a charger and charge it until it is full and then for a few hours more initially, unless the directions state otherwise. Afterwards, insert it in the back of your EVO, turn on your device and voila! If your device isn't functioning after doing that, assume you have a defective extended battery and return it to where you got it from.

Your gonna have to go through like 5-6 FULL/discharge sessions. Charge it for like 3 hours after it hits 100% and then disconnect it and dont charge it UNTIL it completely dies. Then do it again like 5 times.

Everyone keep saying I should root my phone for it to work correctly

Thats so you can install a SBC Kernel but forget about that. Just do the full charge/discharge cycles and your battery should be good in like 3 days.

knowledge561 said:
Your gonna have to go through like 5-6 FULL/discharge sessions. Charge it for like 3 hours after it hits 100% and then disconnect it and dont charge it UNTIL it completely dies. Then do it again like 5 times.
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Iight Imma do it that way now

Even HTC said do NO fully discharge your batery, so I'll take anyone that poists that as bad information.
Here's what works for me:
Here's what I do, and I get PHENOMINAL Battery life.
There are two ways of conditioning a battery that stand out above the rest, and I combine them.
Download the battery monitor widget/app
Set it to your battery's maH in settings.
This isn't totally a needed step, but is a useful app.
Charge your phone until full.
Unplug it, turn it off, then plug it in for one hour.
Turn it on for two minutes, so it fully boots.
Turn it off, unplug it, when the light goes off, plug it back in for one hour.
That part of this is actually from HTC, on how they found the best results for charging.
Now, before you plug it in, unplug, wait for the light to go off, plug it back in.
When the light turns green, unplug it again. Repeat that step 10 times.
(It may not take 10, it may take more, but 10 is good)
While plugged in, boot to recovery, wipe your battery stats.
Then reboot to system.
A good habit to preserve battery life is to keep mobile data off, unless you need it. I used to turn wifi off, too, but lately, I leave it on.
How good is this?? I take my phone off the charger when I leave for work at 7AM, and usually, I go to bed at 11PM, when I charge it back in, and it's never below 80%, unless I've been really using the phone excessivley.
The other thing is, I do this, somewhat daily. I wake up, tuen the phone off ,so my alarm doesn't keep ringing every 15 minutes, unplug it, then not turn it back on til just before I leave, so it's getting that "treatment" at some level, every day.

ok but how do i wipe my battery status?

You have to be rooted to wipe your battery stats. Just do what i said byt dont let the phone fully die then. Let it get to like 5% or something then FULLY charge it for like 2 hours after it hits 100%. Do that like 5 times. What the other dude said will work too. Just do what your comfortable with.
Sent from my......ummm...let me get back at'chya!

yeah im doing it ur way now

Battery drains fast when charger plugged in - Urgent help!

I have a odd problem. I have the Leedroid custom rom with its kernel installed, and it seems as when i plug in the charger that the battery DRAINS extra fast instead of CHARGE. I have no idea whats going on. The red LED light is on as usual but when i turn my phone off for a while and let it charge and then turn it on i only had like 5% battery left when i started charging at 20%. What do i do? Is this some kind of bug?
I dont believe that i cannot charge my phone, but im afraid that if i leave the charger in my phone will become completely drained of battery and that i then wont have any option left.
Please help me, my phone only have 5% battery left, and if there is something i can do before the battery drains completely, tell me as fast as you can!
Thanks!
/Joel

Never mind, i got it to work. It seems as if the battery didnt get enough electricity. Probably because i got the charger hooked up to a powerstrip whom also have a halogene spotlight connected to. That was on. The phone died and when i tried to charge it the red light flashed. So i turned off my spotligt and tried bashing the powerbutton.
The LED started to statically glow red and the phone turned on. I almost panicked because i rooted the phone yesterday and have only had the phone for like 1 and a half week.:angel:

jamenjoel said:
I have a odd problem. I have the Leedroid custom rom with its kernel installed, and it seems as when i plug in the charger that the battery DRAINS extra fast instead of CHARGE. I have no idea whats going on. The red LED light is on as usual but when i turn my phone off for a while and let it charge and then turn it on i only had like 5% battery left when i started charging at 20%. What do i do? Is this some kind of bug?
I dont believe that i cannot charge my phone, but im afraid that if i leave the charger in my phone will become completely drained of battery and that i then wont have any option left.
Please help me, my phone only have 5% battery left, and if there is something i can do before the battery drains completely, tell me as fast as you can!
Thanks!
/Joel
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why dont power off the phone and charge it. maybe there are apps that cause it

acid28 said:
why dont you check which apps consume the battery.
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In this case it wouldnt have mattered since i charged the phone while it was turned off, but as i just wrote, i found out what the problem was. Haha :laugh:
So, a moderator can close the thread if he/she would like to. I will change the topic to *SOLVED*

Charging % difference when phone is off & on

I have a 32GB d855 running 6.0 V30A-ZAF-XX, I put my phone on charge while it was off, charged it until 30% then decided to turn it on, after I booted into marshmallow, suddenly it was saying it is on 57% charge. Does anyone know why and is this a bug which ruins the battery?

t2can said:
I have a 32GB d855 running 6.0 V30A-ZAF-XX, I put my phone on charge while it was off, charged it until 30% then decided to turn it on, after I booted into marshmallow, suddenly it was saying it is on 57% charge. Does anyone know why and is this a bug which ruins the battery?
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Try calibrating using any 'battery calibration' app. I had this problem which was hence solved.
Sent from my LG-D855 using XDA-Developers mobile app

Sreerag ag said:
Try calibrating using any 'battery calibration' app. I had this problem which was hence solved.
Sent from my LG-D855 using XDA-Developers mobile app
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Click to collapse
Do not use any battery calibration app!!!! It can harm your battery unless it has been proven to work on the G3.
Do this instead:
1. Discharge your phone fully until it turns itself off.
2. Turn it on again and let it turn itself off.
3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
4. Unplug your charger.
5. Turn your phone on. It's likely that the battery indicator won't say 100 percent, so plug the charger back in (leave your phone on) and continue charging until it says 100 percent on-screen as well.
6. Unplug your phone and restart it. If it doesn't say 100 percent plug the charger back in until it says 100 percent on screen.
7. Repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without being plugged in.
8. Now, let your battery discharge all the way down to 0 percent and let your phone turn off again.
9. Fully charge the battery one more time without interruption and you should have reset the Android system's battery percentage.
Remember that it is not recommended to perform this process all the time. Even when your battery is so dead your phone won't even turn on, your battery still has enough reserve charge to avoid system damage. But you don't want to poke the tiger with a stick. Perform this process once every three months at the most. If it is required more often than that you have bigger problems at hand.
Put plainly: fully discharging a battery is bad for it. Trying to overload a battery is also bad for it. The good news is that charging batteries automatically shut off when their safe limit is reached and there's always a little in reserve even if your phone won't start. But again: do this only when really necessary, because it does have a negative impact on battery life.
Guide taken of androidpit.com but it is very effective...

aaronkatrini said:
Do not use any battery calibration app!!!! It can harm your battery unless it has been proven to work on the G3.
Do this instead:
1. Discharge your phone fully until it turns itself off.
2. Turn it on again and let it turn itself off.
3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
4. Unplug your charger.
5. Turn your phone on. It's likely that the battery indicator won't say 100 percent, so plug the charger back in (leave your phone on) and continue charging until it says 100 percent on-screen as well.
6. Unplug your phone and restart it. If it doesn't say 100 percent plug the charger back in until it says 100 percent on screen.
7. Repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without being plugged in.
8. Now, let your battery discharge all the way down to 0 percent and let your phone turn off again.
9. Fully charge the battery one more time without interruption and you should have reset the Android system's battery percentage.
Remember that it is not recommended to perform this process all the time. Even when your battery is so dead your phone won't even turn on, your battery still has enough reserve charge to avoid system damage. But you don't want to poke the tiger with a stick. Perform this process once every three months at the most. If it is required more often than that you have bigger problems at hand.
Put plainly: fully discharging a battery is bad for it. Trying to overload a battery is also bad for it. The good news is that charging batteries automatically shut off when their safe limit is reached and there's always a little in reserve even if your phone won't start. But again: do this only when really necessary, because it does have a negative impact on battery life.
Guide taken of androidpit.com but it is very effective...
Click to expand...
Click to collapse
This is an alternate method. The simpler way OS to use the app called 'Battery calibration by NéMa'. The usage instructions are provided with the app. That is, to full charge it after calibration.
I've did this some times because changing roms sometime cause incorrect battery status. And it have not damaged my phone or battery.
Sent from my LG-D855 using XDA-Developers mobile app